EP0452260A2 - Pumping device for a fluid product, particularly liquid or pasty, and dispenser for such a device - Google Patents

Abstract

A dispenser (401) has a pumping device (411) which has a support (413) with a plate-shaped support part (413a), a pump element (411) which can be pressed manually against the latter and at least one pump chamber (439). The latter is connected by means of an outlet valve (437) to the side of the pump element (431) which is accessible from the outside. The pump element (431) and the outlet valve (437) are formed by an elastic diaphragm (433a) which has an outlet hole (433c), and by an essentially dimensionally stable disc (435) which is connected to said diaphragm. When the pump element (431) is non-operative the outlet valve (437) is closed, in which case at most a very small amount of the product to be stored which is present in any case in the outlet hole (433c) can come into contact with the ambient air. If a person manually presses the pump element (431) against the aforesaid support part (413a), the product (451) to be dispensed opens the outlet valve (437). <IMAGE>

Description

The invention relates to a pump device for a flowable, in particular pasty and / or liquid product, and to a dispenser with such a pump device. The pump device and the dispenser are in particular for pumping or storing and dispensing a product for personal care and / or cleaning, for example intended for skin care. The product can, for example, be pasty and consist of a paste or cream. However, the product can also consist of a liquid, for example a liquid sunscreen or a liquid soap, all intermediate states between pasty and liquid being possible.

Many flowable cosmetic products intended for body care, in particular skin care, tend to undergo undesirable changes when exposed to air and / or light. For example, such products can contain active ingredients and / or auxiliary substances and / or fragrances - such as sunscreens or essential oils - which oxidize under the action of the oxygen contained in the air and / or under the action of water vapor contained in the air this and / or react with each other and / or can react chemically in another way. There is also the risk that certain components contained in a product - such as water, alcohol and other volatile substances - can escape from the product in the air through evaporation and / or evaporation. It is known to preserve the products and the like add to prevent undesirable chemical changes of the type mentioned and possibly also drying out. However, this is only partially successful. In addition, preservatives can reduce the effectiveness of the active ingredients and / or have other undesirable side effects.

It would therefore be beneficial for many products intended for skin care to store them in such a way that they can only be used immediately - i.e. when applied to the skin - come into contact with the air. In the case of certain products containing several different active substances and auxiliaries, it would also be advantageous, in order to avoid undesired chemical reactions or other changes, to store two or possibly more components of the product in question and to mix the components in a predetermined ratio only immediately before use .

There are already various dispensers for a pasty product - in particular toothpaste - with a storage device and a pump device for pumping out the product. German utility model 8 518 670, for example, discloses a dispenser for dispensing a toothpaste with two components, namely with a main component and with an additional substance used to form colored stripes. The dispenser has a tubular container with a false ceiling and a jacket in which a piston is slidably guided. This forms the lower limit of a main storage containing the main component of the toothpaste. The container also serves as a support for a pumping device which, above the false ceiling, has a dome-shaped pumping element connected to it, consisting of an elastically deformable membrane and provided in the central area of the dome with a thickening serving to reinforce it, which together with the false ceiling delimits a pumping chamber . The false ceiling is provided with a pivoting valve flap that connects the main accumulator to the pump chamber Provide inlet valve. The pump chamber is connected via an approximately horizontal passage and an outlet valve, which has a pivotable valve flap, to an outlet which is arranged next to the pump element at an edge point of the false ceiling and which is formed by a nozzle and is approximately rectangular in cross section. On both sides of the nozzle serving as an outlet there are two arched storage spaces for the additional substance. These two additional substance stores are each connected to the outlet hole delimited by the outlet connector via an opening in the side walls of the outlet connector. Each of the two additional substance stores is delimited at the bottom by an elastically deformable bottom, which is provided with two check valves each having a flap. One of these two non-return valves enables paste to pass from the pumping chamber into the additional substance reservoir in question. The other check valve in the bottom of each of the two additional substance stores connects the relevant additional substance store to the main store.

When the dispenser known from German Utility Model 8 518 670 is filled, the additional substance is first filled into the two additional substance stores with a press through the main store and the check valves connecting them to the additional substance store. The paste serving as the main component is then poured into the main reservoir from below and the latter is closed off with the piston. When a person uses the dispenser, they temporarily press the dome-shaped pump organ against the resilience generated by its elasticity against the false ceiling of the container. When the pumping goose is pressed down, the paste present in the pumping chamber is pressed into the outlet and through it outwards. At the same time, the check valves connecting the pump chamber with the additional substance stores are opened, so that paste from the pump chamber into the additional substance store is also opened is pressed into it. This paste then in turn presses the additional substance stored in the latter into the outlet. When the person using the dispenser releases the pump organ, the pump organ bulges again due to its elasticity, with paste being sucked into the pump chamber from the main store.

The dispenser known from German utility model 8 518 670 has various disadvantages and would be particularly unsuitable for dispensing a product used for skin care. After the first use of the dispenser, the outlet consisting of a nozzle contains a relatively large amount of the pasty product which is exposed to air until the next time the dispenser is used. As already explained above, however, air contact can have a very disadvantageous effect on products used for skin care and can also cause the outlet to become blocked as a result of the product drying out. Furthermore, the users of pasty skin care products are used to removing them from a can-shaped or potty-shaped container with a finger, so that pushing the product out of a nozzle is undesirable and disadvantageous. Since in the known dispenser the pump chamber delimited on the upper side by the dome-shaped pump element, the passage connecting it to the outlet, the outlet hole delimited by a nozzle and the additional substance store have relatively large volumes, a relatively large volume remains after the last use of the dispenser Amount of the product in this back, which is also disadvantageous in view of the high price of various skin care products. Since a part of the paste pressed out of the pump chamber and serving the main component of the product reaches the additional substance store when the dispenser is actuated, the components can mix in these, which is likewise disadvantageous. The ars the additional substance stores pressed into the outlet Therefore, after some uses of the dispenser, it probably also contains the paste that forms the main component. The mixing ratio of the two components can therefore undesirably change over the course of the donor's period of use. Because of the complicated way around the different corners of the product components pumped out of the different stores and because the piston is located below the paste present in the main store and when emptying the main store contrary to its own weight and especially from When the weight of the paste above it has to be shifted upwards, pumping the product out requires a lot of force. Furthermore, the known dispenser is complicated and accordingly expensive.

In a patent application published on April 11, 1990 by the applicant (EP-A-0 363 307), dispensers with pumping devices were proposed in which the pumping element delimiting the pumping chamber on one side consists essentially entirely of a membrane which is provided with a membrane Exhaust hole is provided and forms the exhaust valve together with a pin rigidly attached to a wall part. In the idle state, the membrane rests on the end face of the pin with an area surrounding the outlet hole. If a person presses the membrane with a finger, the product present in the pumping chamber can bulge the membrane in the area of the pin, so that the outlet valve is opened and product can flow out through the outlet valve. In this dispenser, however, when pressed, the membrane tends to bulge not only depending on the pressure point, but also at other points away from the pressure point, so that the volume of the pump chamber may not be reduced to the intended extent and accordingly not the intended size Amount of the product pressed out of the pumping chamber and then sucked into the pumping chamber when the membrane is released.

The invention has for its object to overcome disadvantages of the known pumping devices and dispensers. Starting from the prior art known from German utility model 8 518 670, a pump device and a dispenser with an outlet hole, which has only a small volume and enables a person to create the dispensed product with at least one finger similar to a can-shaped one, are to be created Wipe container. Furthermore, the pumping device and the dispenser should allow the largest possible portion of the product to be dispensed and be able to be produced inexpensively.

This object is achieved by a pump device and a dispenser with the features of claims 1 and 19, respectively. Advantageous configurations of the pumping device and the dispenser emerge from the dependent claims.

For example, the pump device can have only a single pump chamber. However, the pump device can also have two or possibly even more pump chambers arranged next to one another, each of which is connected via an inlet valve to an associated memory of the dispenser for separate storage of different components of the product to be dispensed. These various components can be fed to the common outlet hole in a predetermined mixing ratio when the pumping gear of the pump device is actuated, and can be mixed with one another in front of and / or in this.

The disk connected to the membrane and together with it forming the outlet valve preferably covers at least that in a plan view of the membrane - ie in plan view most - ie at least 50% - and even better at least 60% or even at least 80% of the area of the or each pumping chamber. For example, the pump chamber and the disk may have a circular outline. The diameter of the disk can then preferably be at least 80% and for example even at least or approximately 90% of the inner diameter of the pump chamber.

In addition to the disk that forms the outlet valve together with the membrane, at least one other disk may possibly be connected to the membrane. The disk used to form the outlet valve can then be arranged, for example, eccentrically to the center of the membrane in an incision or in an opening on the other, larger side. In this case, the aforementioned conditions for the area covered by the disk and the diameter of the disk can then be met by the entirety of the disks connected to the membrane.

The or each disk connected to the membrane is preferably generally dimensionally stable and in particular at least at most of its side or surface facing the membrane - i.e. at least 50% of their surface area taken up in a plan view of the membrane and thus, for example, in the floor plan - stiffer than the membrane. The or each disk is preferably even stiffer than the membrane everywhere - at least with the exception of at least one small disk section serving as a spring or flexible joint. The disk should preferably be stiffer in particular in an area than the membrane, against which the membrane rests when the outlet valve is closed and which, in a plan view of the membrane, encloses its outlet hole and / or valve hole.

• die Figur 1 einen vertikalen oder axialen Schnitt durch einen Spender mit einem einzigen Speicher und einem sich im Ruhezustand befindenden Pumporgan,
• die Figur 2 eine Draufsicht auf das Pumporgan des in der Figur 1 gezeichneten Spenders bei entferntem Deckel,
• die Figur 3 eine schräg von unten her gesehene Ansicht von einem Ausschnitt der zum Pumporgan gehörenden Membran, wobei die an sich unlösbar mit der Membran verbundene Scheibe des Pumporgans weggelassen wurde,
• die Figur 4 einen Ausschnitt aus der Figur 1 mit einem Stück des Pumporgans bei geschlossenem Auslassventil in grösserem Massstab,
• die Figur 5 einen der Figur 4 entsprechender Ausschnitt, aber bei offenem Auslassventil,
• die Figur 6 einen der Figur 1 entsprechenden Axialschnitt durch einen zwei Speicher aufweisenden Spender, von dessen Deckel nur der Umriss angedeutet ist,
• die Figur 7 einen Schnitt durch den Spender gemäss der Figur 6 entlang von deren Linie VII - VII,
• die Figur 8 eine Seitenansicht eines Spenders mit einem verschwenkbaren Pumporgan und zwei Speichern, wobei der Deckel des Spenders nur strichpunktiert angedeutet ist,
• die Figur 9 eine Draufsicht auf das Pumporgan des in der Figur 8 ersichtlichen Spenders,
• die Figur 10 einen Schnitt entlang des Linie X - X der Figur 9 in grösserem Massstab,
• die Figur 11 einen Schnitt entlang der Linie XI - XI der Figur 9 im gleichen Massstab wie die Figur 10,
• die Figur 12 eine separate Schrägansicht von einem der Verschlusskörper des in den Figuren 8 bis 11 ersichtlichen Spenders,
• die Figur 13 einen der Figur 11 entsprechenden Schnitt durch einen Spender mit zwei Speichern, der zu einem grossen Teil ähnlich wie der in den Figuren 8 bis 11 ersichtliche Spender ausgebildet ist,
• die Figur 14 einen Axialschnitt durch einen andern, nur einen einzigen Speicher aufweisenden Spender,
• die Figur 15 eine Draufsicht auf das Pumporgan des in der Figur 14 gezeichneten Spenders bei entferntem Deckel,
• die Figur 16 eine Draufsicht auf die Scheibe des Pumporgans des in den Figuren 14, 15 ersichtlichen spenders bei entfernter Membran,
• die Figur 17 einen Schnitt durch das Pumporgan des Spenders gemäss den Figuren 14, 15 entlang der Linie XVII - XVII der Figur 15,
• die Figur 18 einen Ausschnitt aus der Figur 14 mit einem Teil der Pumpvorrichtung des Spenders gemäss den Figuren 14, 15 in grösserem Massstab,
• die Figur 19 einen Schnitt durch einen Teil des Pumporgans des Spenders gemäss den Figuren 14, 15 entlang der Linie XIX - XIX der Figur 15 in gleichem Massstab wie die Figur 18
• die Figur 20 eine zur Figur 16 analoge Draufsicht auf eine Variante einer Scheibe eines Pumporgans und
• die Figur 21 eine Draufsicht auf zwei zu einer Variante eines Pumporgans gehörenden Scheiben, wobei von der Membran des Pumporgangs nur strichpunktiert die Randlinie und das Auslass- und/oder Ventilloch angedeutet sind.

The subject matter of the invention and further advantages thereof will now be explained with reference to exemplary embodiments shown in the drawing. In the drawing shows

• FIG. 1 shows a vertical or axial section through a dispenser with a single store and a pumping element which is at rest,
• FIG. 2 shows a top view of the pump organ of the dispenser shown in FIG. 1 with the cover removed,
• FIG. 3 shows an oblique view from below of a section of the membrane belonging to the pumping organ, the disc of the pumping goose, which is intrinsically inseparably connected to the membrane, being omitted,
• FIG. 4 shows a detail from FIG. 1 with a piece of the pumping goose on a larger scale with the outlet valve closed,
• 5 shows a section corresponding to FIG. 4, but with the outlet valve open,
• FIG. 6 shows an axial section corresponding to FIG. 1 through a dispenser having two stores, the cover of which only indicates the outline,
• FIG. 7 shows a section through the dispenser according to FIG. 6 along the line VII-VII thereof,
• FIG. 8 shows a side view of a dispenser with a pivotable pump organ and two stores, the lid of the dispenser being only indicated by dash-dotted lines,
• FIG. 9 shows a top view of the pump organ of the dispenser shown in FIG. 8,
• 10 shows a section along the line X - X of FIG. 9 on a larger scale,
• 11 shows a section along the line XI-XI of FIG. 9 on the same scale as FIG. 10,
• FIG. 12 shows a separate oblique view of one of the closure bodies of the dispenser shown in FIGS. 8 to 11,
• FIG. 13 shows a section corresponding to FIG. 11 through a dispenser with two memories, which is largely designed similarly to the dispenser shown in FIGS. 8 to 11,
• FIG. 14 shows an axial section through another dispenser having only a single store,
• FIG. 15 shows a top view of the pump organ of the dispenser shown in FIG. 14 with the cover removed,
• 16 shows a plan view of the disk of the pumping goose of the dispenser shown in FIGS. 14, 15 with the membrane removed,
• FIG. 17 shows a section through the pump organ of the dispenser according to FIGS. 14, 15 along the line XVII - XVII of FIG. 15,
• FIG. 18 shows a detail from FIG. 14 with part of the pumping device of the dispenser according to FIGS. 14, 15 on a larger scale,
• 19 shows a section through part of the pumping gans of the dispenser according to FIGS. 14, 15 along the line XIX-XIX of FIG. 15 on the same scale as FIG. 18
• FIG. 20 shows a plan view analogous to FIG. 16 of a variant of a disk of a pumping goose and
• FIG. 21 shows a plan view of two disks belonging to a variant of a pumping goose, the edge line and the outlet and / or valve hole being indicated only by dash-dotted lines of the membrane of the pumping passage.

The dispenser 1 shown in FIG. 1 and - apart from the lid - in FIG. 2 has a container 3 which, as the main component, has an integral, dimensionally stable can 5 with a flat, horizontal bottom 5a and a generally cylindrical jacket 5b. The latter has a somewhat thinner section on the outside at its upper end with an external thread 5c and an inside surface 5d on the inside. This has a substantially cylindrical main section 5e at the bottom and an essentially likewise cylindrical extension 5f at the upper end, which forms a radial shoulder surface at its base. However, the inner surface 5d is provided with a recess 5g at at least one circumferential point, which extends at an angle from the mouth of the extension 5f through the shoulder surface provided at the base thereof to the upper end region of the main section 5e.

A pump device 11 arranged essentially at the upper end of the can 5 has a support 13 which consists of an integral, dimensionally stable body. The support 13 has a plate-shaped support part 13a which is arranged in the upper end region of the interior of the can 5 and is generally flat, horizontal and radial to the can axis, which is also referred to below as the plate 13a. This forms both a wall part of the pump device 11 and of the entire container 3, namely the base part of the pump device and an intermediate ceiling of the container 3. The plate 13a hangs in its center with one projecting downwards into the vicinity of the base 5a Connection 13b together. The support 13 is provided with a straight, axial passage 13c with a circular cross section, which has a section formed by the interior of the connecting piece and a section the plate 13a has a penetrating section and extends continuously from the lower nozzle end to the upper side of the plate 13a. The plate 13a is provided in an annular connection area 13d on its lower side with an annular groove encircling the connecting pieces 13b in the floor plan, in the bottom of which some continuous anchoring holes distributed over its circumference open, which consist of slots or elongated holes which are bent coaxially to the annular groove. The plate 13a has on its upper side a groove 13f running along its edge and somewhat inside of it an axially upwardly projecting, hollow cylindrical, annular collar 13g, the edge of which is rounded on the outside.

A dimensionally stable retaining ring 15 is delimited on the outside and inside by a cylindrical surface in each case and has a groove 15a on the outside and an extension 15b on the inside. The upper, thicker end section of the retaining ring 15 is for the most part in the extension 5f and lies with the shoulder surface formed by its throat 15a on the shoulder surface formed by the extension 5f of the can 5. The lower, thinner end portion of the retaining ring 15 protrudes into the throat 13f of the plate 13a. The plate 13a is rigidly and tightly connected to the retaining ring 15, for example by ultrasonic welding, which in turn is rigidly and tightly connected to the casing 5b of the can 5, for example by ultrasonic welding. The support 13 and the retaining ring 15 together form the fixed wall of the pump device 11 and together with the can 5 the fixed wall of the container 3.

An axially displaceable, one-piece piston 17 is arranged in the interior of the container 3 between the base 5a and the plate 13a and has a disc with a central hole 17a penetrated by the connector 13b. The latter and on the outer edge, the disc has an upwardly projecting, coaxial collar for sliding guiding and sealing of the piston. The collar located at the outer edge is provided at its upper end with some incisions distributed over its circumference, which serve as air passages. In its initial position shown in FIG. 1, the piston can rest on the plate 13a with both collars. In the initial position, between the part of the piston and the plate 13a located between the two collars, there is a narrow space which, when the container 3 is open, passes through the incisions in the outer collar and the recess 5g with which above the edge of the casing 5b and of the retaining ring 15 located area of the surrounding space is connected. The area of the container interior between the bottom 5a and the piston 17 forms a storage chamber or - in short - a storage 21.

A one-piece, soft, elastic body 25 has as its main component a disk-shaped membrane 25a which is flat in the undeformed state of rest and rests on the upper side of the plate 13a and has at least one valve hole and preferably several, for example two valve holes 25c. These are distributed in plan around the mouth of the passage 13c of the plate 13a and consist of slots or elongated holes which are bent coaxially to the passage 13c. The valve holes 25c are arranged in the floor plan between the passage 13c and the annular connection area 13d surrounding them such that each valve hole 25c is at a distance from the passage 13c and preferably also from each anchoring hole present in the connection area 13d. The membrane 25a is firmly and tightly connected to the plate 13a by connecting means 25d in the connection area 13d. For each anchoring hole, the connecting means 25d have a pin which penetrates the membrane 25a. The pins are in the ring groove of the connecting area by a coherent, ring-shaped one the plate 13a located, lying against the bottom of the annular groove and filling this holding section connected to each other. The membrane 25a is connected at its outer edge to a collar 25f projecting axially away from the plate 13a up to the edge of the collar 13g. This lies with its outer surface on the inner surface of the collar 13g. The edge of the collar 25f is rounded inward and downward away from the inner edge of the edge of the collar 13g. The central regions of the plate 13a and the membrane 25a together form an inlet valve 27 of the pump device 11.

The pump device 11 also includes a pump member 31 arranged above the plate 13a and thus on its side facing away from the accumulator 21, with a one-piece, relatively soft, elastic body 33 and a one-piece disk 35. The body 33 has a membrane 33a with an undeformed idle state flat, horizontal, disc and circular body. This is provided on its upper side with a bowl-shaped, relatively flat recess 33b, in the lowest point of which a continuous outlet and / or valve hole 33c opens. The boundary surface of the recess 33b extends without edges from the mouth of the outlet and / or valve hole 33c to its outer edge and is, for example, continuously concave, but could also be conical. The recess 33b and the hole 33c are arranged, for example, eccentrically to the membrane 33a and to the casing 5b of the can 5 and thus have an axis which is offset from the axis of the can but parallel to it. The body 33 has connecting means 33d with a plurality of, for example four, pins 33f connected to the membrane 33a and distributed uniformly on a circle concentric with the hole 33c. These are bent according to FIGS. 2 and 3 along said circle and are connected at their end facing away from membrane 33a with an annular holding section 33g, which can be seen particularly clearly in FIG. It should be noted here that the membrane 33 in 3 was drawn separately from the disk 35 to improve clarity, but in reality cannot be separated from the disk 35 without destruction. The membrane 33a lies at its outer edge or - more precisely at the outer edge of its main part, which is flat, in the form of a disc-arch, at rest - on the edge of the collar 13g and hangs there over a continuously curved transition section with a downward, that is to say toward the accumulator 21, generally cylindrical edge portion 33h together. This protrudes from above into the annular gap between the collar 13g and the retaining ring 15 and is provided at its lower end with an outwardly projecting projection 33i which engages in the extension 15b of the ring 15. The membrane portion 33a is thus firmly connected with its edge portion 33h at the upper edge of the jacket 5b of the can 5 to the latter and to the plate 13a and thus to the fixed wall of the container 3.

The disk 35 is arranged on the lower side of the main part of the membrane 33a which is flat in the idle state and faces the accumulator 21. The disk 35 is generally flat, but has an upwardly projecting cam 35a and is provided with at least one passage 35c and preferably with several, namely for example two such, which laterally in plan against the outlet and / or existing in the membrane 33a Valve hole 33c are offset and distributed around it and are therefore at a distance from it. The passages 35c consist of slots or elongated holes and form circular arcs in the plan view of the axis of the outlet and / or valve hole 33c. The disk 35 is tightly and firmly connected to the membrane 33a by the connecting means 33d in an inner, circular connection area 35d, which encloses the hole 33c and the passages 35c in the plan. In the connection area 35d, the disk 35 has the same outline shape for each pin 33f that it has penetrated by it having continuous anchoring hole 35f. The anchoring holes 35f open into a circular holding groove 35g which is present on the underside of the disk 35 and which contains the annular holding section 33g of the connecting means 33d which lies against and fills the base thereof. The regions of the diaphragm 33a and the disk 35 provided with the hole 33c and the passages 35c together form the outlet valve 37 of the pump device 11.

It should be noted here that the anchoring holes of the plate 13a, which are not shown in FIG. 2 to improve clarity, and the pins of the connecting means 25d connected to the membrane 25a can have the same or similar outline shapes and dimensions as the anchoring holes 35f of the disk 35 or the pins 33f connected to the membrane 33a.

There is a free space between the diaphragm 25a belonging to the inlet valve 27 and the disk 35 belonging to the outlet valve 37, which serves as a pump chamber 39.

The dispenser 1 also has a cover 41 with an internal thread 41c which can be screwed onto the external thread 5c of the can 5. When screwed on, the cover 41 closes the can 5 and thus the entire container 3 at least approximately gas-tight.

The various parts of the dispenser - apart from the pasty product 51 to be stored - are all made of thermoplastic, injection-molded plastic, for example. The parts used to form the solid wall of the container 3 - ie the can 5, the support 13, and the retaining ring 15 - and also the disk 35 and the cover 41 consist of reasonably hard and dimensionally stable, thermoplastic material. These parts and in particular the support 13 and the disk 35 can have a minimum of 1000 MPa and for example have at least 2000 MPa modulus of elasticity and contain, for example, polypropylene or polystyrene as the basic and main constituent or a copolymer of one of these plastics, such as polystyrene acrylonitrile. The two bodies 25, 33, which form the membranes 25a and 33a, consist of a softer material with a smaller, for example at most 500 MPa and better at most 400 MPa or even only at most 100 MPa. The bodies 25, 33 are therefore relatively soft-elastic or even rubber-elastic and can consist, for example, of a polyethylene, polyamide and at least one additive-containing mixture or of silicone rubber. It should be noted in particular that the disc 35 is stiffer in the region of its entire side or surface facing the membrane than the membrane 33a and is therefore at least dimensionally stable in comparison to the latter. The piston 17 consists of a plastic whose modulus of elasticity lies approximately between that of the parts forming the wall of the container and that of the membranes 25a, 33a and is, for example, approximately 600 to 1000 MPa.

The parts of the dispenser 1 are preferably all produced by injection molding. For the manufacture of the two valves 27, 37, the essentially dimensionally stable body 13 and the essentially dimensionally stable disc 35 are first cast. Then, with appropriate casting molds, the soft, elastic bodies 25 and 33 forming the membranes 25a, 33a are poured onto the Support 13 or on the disc 35. In these injection molding processes, the flowable molding material penetrates the anchoring holes and thereby forms the connecting means 25d and 33d. Thereafter, the pump member 31 consisting of the body 33 and the disk 35 can be clamped to the support 13 forming the plate 13a with the aid of the holding ring 15 and the holding ring 15 can be firmly connected to the plate 13a, for example by ultrasonic welding. To fill and finish the dispenser 1, fill it from above paste product 51 into can 5. Then the piston 17 is pushed onto the socket 13b until it abuts the plate 13a and is inserted into the can 5 together with the pumping device 11. When and / or after the pumping device is inserted, pasty product flows into the passage 13c of the inlet valve 27, through this into the pumping chamber 39 and preferably also into the passages 35c belonging to the outlet valve 37. The retaining ring 15 is then connected, for example by ultrasound welding, to the jacket 5b of the can 5. Advantageously, a not shown, at least the outlet and / or valve hole 33c of the membrane 33a and for example the entire membrane 33a, the retaining ring 15 and the edge cover film covering the can jacket 5a and at least approximately or completely gas-tight against the environment, can be torn away or adhered to the membrane 33a and / or to the retaining ring 15 and / or to the edge of the can jacket 5a or in some other way. Finally, the cover 41 is screwed on.

When the pumping device 11 is in the idle state shown in FIG. 1, the disk 35 is parallel to the plate 13a and - when the dispenser is arranged upright - like this horizontally. The membrane 25a then lies up to the collar 13g and thus in particular in the area of the plate 13a enclosed by the connection area 13d, so that the inlet valve 27 is closed. The membrane 23a lies close to the surface of the disk 35 facing it and in particular to its surface area enclosed by the connecting area 35d. In addition, the cam 35a protrudes into the outlet and / or valve hole 33c, so that the outlet valve 37 is closed.

The membrane 33a can in particular be elastically deformed, namely bent and stretched, in an annular deformation region which is located between the outer boundary of the connecting means 33d and the cylindrical edge section 33h. If a person wants to remove pasty product from the dispenser, he first removes the cover 41, tears away the cover film covering the membrane 33a until the dispenser is used for the first time, and then presses on manually from the surroundings and from above, ie with at least one finger a pressure point of the membrane 33a located in the area of the disk 35 and next to the outlet and / or valve hole 33c - approximately at its center - on this. As a result, the inner part of the pumping goose 31, which is located in the plan inside the collar 25f, and in particular the disk 35, can be displaced against the plate 13a against the restoring force generated by the elasticity of the membrane 33a, starting from the rest position shown in FIG that the volume of the pump chamber 39 is reduced. When the person using the dispenser releases the pump organ, said restoring force brings the inner part of the membrane 33a and the disk 35 back into the rest position, so that the pump organ returns to the idle state. When the inner pump part is depressed, the pasty product contained in the pump chamber is pressurized to open the outlet valve 37. The area of the membrane 33a enclosed by the connecting means 33d in the floor plan is elastically deformed and bulged through the pasty product in the manner shown schematically in FIG. 5, so that the cam 35a comes out of the outlet and / or valve hole 33c and between the latter as well as the passages 35c a connection passage becomes free. As a result of the pressure generated, a portion of pasty product 51 then flows from the pumping chamber 39 through the passages 35c of the disk 35, the said connecting passage and the outlet and / or valve hole 35c of the membrane 33a onto the upper, outer one Side or surface of the latter in the recess 33b and possibly on the region of the membrane 33a adjacent to this. This outflow of pasty product is indicated in FIG. 5 by arrows. At the end of the outflow process, the membrane 33a, due to its elasticity, returns to its idle form, which closes the outlet valve. The person using the dispenser 1 can wipe the portion of the product on the upper sides of the membrane 33a with at least one finger. At least in the event that the dispenser is no longer to be used for a longer period of time, it is advantageous if the lid 41 is screwed onto the can 5 again after the pasty product has been removed.

When the inner part of the diaphragm 33a and the disk 35 of the pumping goose 31 move back into the rest position after the temporary pushing down of the latter, the inlet valve 27 is opened by the negative pressure which arises in the pumping chamber 39, and pasty product from the store 31 into the Pump chamber 39 sucked. The opening process of the inlet valve takes place in a manner similar to that previously described for the outlet valve. The piston 17 slides down as a result of the negative pressure which arises when it is sucked out of the accumulator 21 and as a result of its own weight and thus runs after the product level. Air from the surroundings can flow in through the at least one recess 5g and the incisions in the upwardly projecting outer collar of the piston 17 into the space between the plate 13a and the piston 17 that becomes larger and / or newly created when the piston slides downward.

After the training and the general function of the donor have been previously described, some details and advantages should now be explained.

The portion of the pasty product squeezed out of the dispenser 1 when the pumping goose 31 is actuated can be easily wiped away from the membrane 33a such that even with long fingernails of the person using the dispenser, no product gets under their fingernails. The relatively flat and continuously curved base surface of the recess 33b in the axial section enables the product contained in the recess 33b to be removed practically completely with ease when using the dispenser.

According to FIG. 1, the diameter of the disk 35 is only slightly smaller than the diameter of the main part of the pump chamber 39, or - more precisely - as the inner diameter of the lower main part of the collar 25f. The disk 35 thus covers the largest part in the plan, namely approximately or at least 80% of the plan area of the pump chamber and thus practically the entire pump chamber. Since the disk 35 is also essentially dimensionally stable, it approaches the plate 13a over its entire surface area, almost independently of the pressure point at which a person presses the pump organ, and causes a reduction in the pressure Volume of the pump chamber. The membrane 33, which is firmly connected to the disk 35 in the connection area 35d, also bears against a large part of the surface of the disk 35 facing it when the pumping goose is pressed down. At least when the person using the dispenser 1 presses on the membrane 33a in the central plan area of the pumping goose 31, the disk 35 also remains at least approximately parallel to the plate 13a when pressed down.

The piston 17 and the two valves 27, 37 ensure that no air or at least practically no air can flow into the accumulator 21 from the surroundings. Furthermore, the outlet valve 37 also practically completely prevents the inflow of air into the pump chamber 39. Between successive withdrawals of pasty product, there can only be one If necessary, the amount of product still located above the end face of the cam 35a in the outlet and / or valve hole 33c come into contact with the ambient air. However, the diameter of the hole 33c is at most 6%, preferably at most or about 4% of the diameter of the store 21, ie the inside diameter of the can. The maximum, axially measured thickness of the membrane 33a is likewise at most about 6% and for example at most about 4% of the storage diameter. With an outer diameter of the can 5 which is, for example, approximately 70 mm to 80 mm and a diameter of the reservoir which is approximately 6 mm to 10 mm smaller, the diameter of the outlet and / or valve hole 33c can be, for example, at most 5 mm or even only approximately 2 mm. Furthermore, the maximum thickness of the membrane 33a can be, for example, at most or approximately 2 mm. Because of the recess 33b, the axial dimension of the hole 33c is also smaller than the maximum thickness of the membrane 33. Furthermore, the hole 33c is at least partially filled by the cam 35a when the outlet valve 37 is closed. The amount of pasty product remaining in the hole 33c between successive product withdrawals is therefore very small. There is practically no product in the dispenser in contact with the ambient air. Accordingly, hardly any active ingredients or other components of the product can react with the atmospheric oxygen and / or possibly with the water vapor present in the air and / or under the influence of air components. This makes it possible to use products which contain only small amounts of preservatives or none at all. Furthermore, practically no parts of the product can dry out. Accordingly, there is no risk that the outlet and / or valve hole will be blocked.

The passages between the accumulator 21 and the pump chamber 39 and between this and the outer mouth of the outlet and / or valve hole 33c contain only a few corners and require only a few changes in the flow direction when pumping out the product. This has a beneficial effect on the force and energy required to pump out the product. This power and energy requirement is further reduced a little by the fact that the weight of the piston 17 supports its downward movement that occurs during pumping.

When using the dispenser, a certain residual amount of the product that cannot be pumped out may remain in the pumping chamber and in various valve holes after the storage 21 has been emptied. However, this residual amount is relatively small compared to the total amount of product that can initially be stored in the dispenser.

The dispenser 1 is inexpensive to manufacture. Since the piston moves downwards when the product is removed, the can 5 can be completely closed at the bottom. Like the can 5, this allows cans to be used for conventional dispensers not according to the invention without a pump device 11. Under certain circumstances, this makes it possible to manufacture the cans 5 and the lid 41 in larger series and therefore more cost-effectively.

The dispenser 101 shown in FIGS. 6 and 7 has a container 103 with a can 105 and a pump device 111 with a dimensionally stable support 113. This consists of a one-piece body and has a flat, horizontal, plate-shaped support part 113a, ie a plate 113a. Like the plate 13a, this forms a wall part of the pumping device and of the entire container, namely a plate of the container. The can 105 has a similar outline shape to the can 5, but contains a vertical partition 105h which extends from its base 105a to the underside of the plate 113a and which is connected to the base and which is arranged diametrically, for example, and the interior of the can is the same in two subdivide large compartments can. The jacket 105b of the can 105 is provided on the inside in its upper edge region for each compartment with at least one recess 105g corresponding to the recess 5g and indicated by dash-dotted lines in FIG. 6. The body 113 has, for each can interior compartment, a nozzle 113b projecting into it with a passage 113c opening into the upper side or surface of the plate 113a. In each of said compartments there is a piston 117 with a hole penetrated by the relevant connector, the two pistons being displaceable independently of one another. Between the can bottom 105a and each piston 117 there is a storage chamber or - in short - a storage 121, the two storage 121 being completely and tightly separated from one another.

The plate 113a is provided with a group of continuous anchoring holes and continuous, ring-shaped holding grooves in two ring-shaped connection areas 113d, each of which has an outline opening into the plate surface of a passage 113c, for example overlapping and 8-shaped connection areas. Arranged on the upper side of the plate 113a is a body 125 corresponding to the body 25, which has a membrane 125a which has at least one valve hole 125c laterally offset from it for each passage 113c. The or each valve hole 125c associated with a passage 113c is located in the floor plan within the connection area 113d, which surrounds the passage 113c in question. The body 125 has, for each connection region 113d, connection means 125d which are connected to the membrane 125a and which have pins which penetrate the anchoring holes of the plate 113a and which have annular, overlapping, ie continuous, and together forming an 8-holding sections which fill the two holding grooves of the plate. The two connecting areas 113d, their holding grooves and the annular holding sections of the connecting means 125d seated in the latter could but are also at a distance from each other. The membrane 125a is connected by its connecting means 125d to the plate 113a in the two annular connection areas 113d in an analogous manner to the membrane 25a to the plate 13a. The plate 113a and the diaphragm 125a together form two inlet valves 127. The body 125 also has a pair of ribs 125k which are connected to the diaphragm 125a and extend upwards therefrom, which together form a groove which runs along the partition 105h and which coincides with this in plan limit.

A pump organ 131 has a body 133 with an elastic membrane 133a and an essentially dimensionally stable disc 135. The membrane 133a has, for example, an outlet and / or valve hole 133c in its center and is connected to the can 105 and to the disk 135 in a similar manner to the membrane 33a to the can 5 or the disk 35. The disk 135 is suspended a rib 135k that protrudes downward into the groove between the ribs 125k and together with the rib 125k forms separating means that divide the space between the membrane 125a and the pumping element 131 into two pump chambers 139 of the same size. The disk 135 has at least one passage 135c consisting of a through hole in the region of each pump chamber. The regions of the membrane 133a and the disk 135 provided with the hole 133c and the passages 135c together form an outlet valve 137. Furthermore, a cover 141 which can be unscrewed from the can 105 is also present.

The two inlet valves 127 can open and close independently of one another and, in the open state, each connect one of the reservoirs 121 to one of the pumping chambers 139. The outlet valve 137 common to both pumping chambers 139 connects the two pumping chambers 139 in the open state to the common outlet and / or valve hole 135c. Otherwise - that is, so far nothing was specified otherwise - the dispenser 101 is designed similarly to the dispenser 1.

When the dispenser 101 is provided and filled, the one reservoir 121 and the pump chamber 139 connected to it via one of the inlet valves 127 can be filled with a component 151 of a pasty product to be formed. The other reservoir and the other pumping chamber can be filled with another component 153 of a pasty product to be formed. The two components 151, 153 in turn both consist of a flowable, pasty product and can for example contain the same carrier and / or base substance and at least partially different active ingredients. When a person actuates the pumping element 131, the two separately stored components 151, 153 are pumped separately to the outlet valve 137 and are only brought together and more or less at the outlet and / or valve hole 133c which forms the outlet from this and also the outlet of the entire dispenser evenly mixed together. If the person using the dispenser wipes the product from the upper side of the membrane 133a with at least one finger and, for example, applies it to the skin on the face or at another part of the body, the components of the product are also mixed with one another.

The separate storage of two components of a product is particularly advantageous if the two components contain active substances and / or auxiliary substances which can react with one another under the action of air and their constituents - in particular oxygen and / or possibly water vapor - or even without air and / or which, when mixed, have a greater tendency to react with air components than separately. The separate storage can therefore make it possible to store products which otherwise could not be stored or only with the addition of large amounts of preservatives and the like.

When the movable part of the pumping gear 131 is pressed down, the rib 135k of the disk 135 slides temporarily deeper into the groove between the two ribs 125k of the membrane 125a attached to the plate 113a. The person using the dispenser 1 should of course not close the outlet and / or valve hole 133c in this embodiment of the dispenser, for example in the center of the membrane 133a, when manually depressing the pumping element 131, but preferably in the vicinity of the outlet and / or or valve holes 133c and thus press on the inner or middle area of the membrane 133a. Under this condition, the disc 135 remains at least approximately parallel to the position assumed by the disc in the idle state and to the flat surface parts of the plate 113a and the membrane 125a connected to it. When pumping, the two components 151, 153 are then always conveyed at least approximately and practically exactly with the same intended quantity ratio and then mixed together. Likewise, the said ratio is also at least substantially independent of the fill level of the two stores.

The dispenser 201 shown in FIGS. 8, 9, 10 and 11 has a container 203 with a one-piece, generally circular-cylindrical can 205. This has a bottom 205a and a jacket 205b, which is provided at its upper end with an external thread 205c, a cylindrical inner surface 205d and a through hole 205g in the middle height region. It should be noted here that there could possibly also be two or more holes 205g distributed along the circumference at the same height.

The pump device 211 located at the upper end of the can has a support 213 with a plate-shaped support part 213a, which is also referred to briefly below as plate 213a. As in the previously described dispenser variants, this forms both a wall part the pump device 211 as well as the entire container 203 and namely an intermediate ceiling of the latter. A first nozzle 213b and a second nozzle 213c protrude from the plate 213a parallel to the axis of the can up to the vicinity of the base 205a. The two connecting pieces 213c are arranged, for example, symmetrically to the axis of the container 203. The support 213 has a hole 213d in each connection piece 213b, 213c, which has a section penetrating the plate 213a and a section formed by the interior of the relevant connection piece. The first nozzle 213b has a compact, hole-free casing and is open to its lower end, so that the hole 213d present in the first nozzle opens into the interior of the container 203 at the lower nozzle end. The second connecting piece 213c has at its end connected to the plate 213a at least one radial hole 213e penetrating its jacket and namely a plurality of such holes which are distributed over its circumference. A rod-shaped insert 215 inserted in the second connector 213c closes the hole 213d of the second connector 213c between its lower end and the holes 213e. The plate 213a is connected in the vicinity of its edge with a collar 213g which projects upwards, ie from the bottom 205a. This is generally cylindrical, but has a stop 213h projecting outwards at a circumferential location which is located in FIG. 10 on the right side of a plane running through the axis of the two holes 213d. On the other side of the plane passing through the axes of the two holes 213d, inside and near the collar 213g there is a hinge part 213i consisting of a one-piece body with the plate 213a. This is formed by a straight, parallel to the plane mentioned, projecting from the plate 213a rib, which at its end facing away from the plate has a thickening of circular cross-section in cross-section, which performs the function of a hinge pin. In the vicinity of the peripheral portion of the collar 213g having the stop 213h and within this the plate 213a is connected to a pin 213k projecting from it.

In the interior of the container 205 there are two pistons 217 and 219 arranged one above the other, which have the same outline shapes in plan and two holes 217a and 219a, respectively, penetrated by the connecting pieces 213b, 213c and are displaceably guided through the jacket 205b and the two connecting pieces. In the initial position shown in FIGS. 10 and 11, the two pistons 217, 219 bear against one another in places in such a way that a cavity is present between them, into which the hole 205g opens. In the container 3 there is a first accumulator 221 between the base 205a and the piston 217 located closer to it, and a second accumulator 223 between the plate 213a and the piston 219 located closer to the latter. The two stores have at least approximately and preferably exactly the same volumes or - more precisely - interior volumes.

The support 213 is provided at each hole 213d with a sleeve 225 rigidly connected to the plate 213a, which has a main section 225a lying on the side of the plate 213a facing away from the bottom 205a, and a thinner neck which fits snugly into that assigned hole 213d protrudes and is at its lower end flush with the underside of the plate 213a. Each of the two sleeves 225 has a continuous, stepped hole 225c. In the region of the neck 225b, the latter has a narrower section and a cylindrical section at its end facing away from the neck, and a conical widening between the two cylindrical sections, which serves as a valve seat 225d.

For each sleeve 225 there is for the most part a closure body 227 which is arranged in the sleeve and can be moved along its axis and thus along the axis of the hole 213d provided in the sleeve in question. One of these is drawn separately in FIG. Each closure body 227 has, as the main section, a pin which is rotationally symmetrical about the axis, U-shaped, hollow, closed at the lower end formed by the U-bend and open at the other upper end. Its cylindrical jacket is provided on its outside with at least three and for example four guide ribs 227a distributed over its circumference. Furthermore, four elastically deformable, tongue-shaped springs 227b are integrally formed on the upper end of the U-shaped main section, which together form an arc in pairs and are supported on the pump member 231, which is described in greater detail, with their free ends projecting upward. The springs 227b together form spring means which resiliently press the U-shaped main section of each closure body 227 against the associated valve seat 225d. Each sleeve 225 together with the closure body 227 forms an inlet valve 229 of the pump device 211.

The pump member 231, which belongs to the pump device 211 and is arranged on the side of the plate 213a facing away from the base 205a, has a one-piece, soft, rubber-elastic body 233 and a generally dimensionally stable, one-piece body 235. The body 233 has a diaphragm 233a with a main part which is flat in the undeformed idle state and which is penetrated by an outlet and / or valve hole 233c which is in the plan, for example, between the two inlet valves 229 in the center of the diaphragm 233a. The body 233 also has connecting means 233d which are connected to the membrane 233a and which, for example, similar to the connecting means 33d, have a few pegs distributed along a closed line and an annular holding section which is connected to the membrane by the latter and which, in plan view, preferably shows the two in FIG Plate 213a encloses existing holes 213d and, for example, as can be seen in FIG. 9, is elliptical or oval. For example, the edge of the membrane 233a is bent toward the bottom 205a.

The one-piece body 235 has a generally flat disc 235a. From this, two annular collars 235b, each coaxial to one of the valve holes 213d, protrude against the plate 213a, the two collars being connected, for example, in the plan and forming an 8 together. In each of the areas of the disk 235a enclosed by one of the collars 235b, the disk 235a is provided with at least one passage 235c penetrating it and namely with two such. The membrane 233a is tightly connected to the disk 235a by the connecting means 233d in a connecting area 235d surrounding the outlet and / or valve hole 233c and all passages 235c. The disk 235a has in the connection area for each pin of the connection means 233d a hole penetrated by it and an elliptical or oval holding groove which receives the annular holding section of the connection means 233d. Each passage 235c consists of a circular hole, i.e. a bore and on the side of the disk 235a facing away from the plate 213a in this existing groove 235e, which extends into the vicinity of the outlet and / or valve hole 233c but is still at a distance therefrom and the opening facing the membrane 233a of passage 235c. The sections of the membrane 233a or the disk 235a which have the outlet and / or valve hole 233c and the passages 235c together form the outlet valve 237 of the pump device 211.

The body 235 also has a hinge part 235f with two slightly resilient webs projecting from the plate 235a against the plate 213a and parallel to one another, which near their free ends have mutually facing grooves into which the circular cylindrical thickening of the hinge part 213i engages is. The hinge parts 213i, 235f together form a hinge 245 which pivotally connects the pump element 231 to the support 213. The pivot axis of the hinge is parallel to the plate 213a and to the plane which runs through the two holes 213d.

The body 235 also has an annular flange 235g which is connected to the edge of the disk 235a and projects away from it against the plate 213a and surrounds the collar 213g on the outside. Its lower edge is inclined away from its circumferential region located near the hinge part 235f to its most distant circumferential region from the plate 213a, as can be seen particularly clearly in FIG. 8. The flange 235g has at the stop 213h an inwardly projecting stop 235h which engages behind it in the position of the pumping element 231 shown in FIGS. 8, 10, 11. The pump device 211 has at least one spring 241 which engages the support 213 and the pump element 231, namely a helical compression spring which is inserted on the pin 213k and which presses the pump element 231 together with the springs 227b away from the plate 213a.

For each sleeve 225 there is a one-piece ring 243 which has a lower, the main section 225 of the sleeve 225 in question along its axis and at least reasonably tightly enclosing edge section and an upper, somewhat further, edge section firmly inserted in the collar 235b. The web connecting the two edge sections of the ring 241 to one another is slightly deformable, so that it can convert swivels of the body 235 and the ring edge section attached to it into displacements of the ring edge section surrounding the sleeve 225 in question. Each of the two sleeves 225, together with the area of the disk 235a located within a collar 235b and the associated ring 243, delimits a pump chamber 239, namely a first pump chamber located on the right in FIG. 11 and a first pump chamber located on the left in FIG. second pumping chamber. The two sleeves 225 and the two rings 243 each have the same dimensions, so that the inner surfaces measured in the plan and the inner volumes of the two pumping chambers 239 are also of the same size. Hole 213d of the first one, continuously open nozzle 213d and the hole 225c of the sleeve 225 assigned to the first nozzle together form a first passage 251 connecting the first reservoir 221 to the first pumping chamber 229 through the support part 213a. The open section of the hole 213d and the holes 213e of the second Stub 213c together with the hole 225c of the sleeve 225 associated with the second stub form a second passage 253 which connects the second reservoir 223 to the second pumping chamber 239.

The dispenser also has a cover 247, indicated by dash-dotted lines in FIGS. 8, 10, 11, which has an internal thread which is detachably screwed to the external thread 205c. The various parts of the dispenser 201 described are - possibly with the exception of the spring 241 - made of injection-moldable plastics, as in the previously described dispensers. The spring 241 can be made of a metallic material or, like the other parts of the dispenser, can be made of plastic.

When assembling the dispenser 201, its stores 221, 223 are each filled with a component of the product to be dispensed, not shown, in such a way that the two pistons 217, 219 are in their initial positions shown in FIGS. 10, 11, so that this is for ventilation serving hole 205g opens into the cavity between the pistons. The product components are filled in such that they also fill the passages 251, 253 of the two inlet valves 229, the pump chambers 239 and the passages 235c penetrating the disk 235a.

When the pump device 211 is in the idle state shown in FIGS. 8, 10, 11, the disk 235a is parallel to the plate 213a and - when the dispenser is upright - like this is horizontal. Furthermore, the two inlet valves 229 and the outlet valve 237 are closed. If a person with the cover 247 removed the pump element 231 manually counter the force generated by the spring 241 pivoted against the plate 213a of the support 213, the outlet valve 237 opens similarly to the dispensers 1, 101, so that certain quantities of the components of the pasty product present in the two pumping chambers 239 are pumped out through the outlet valve 237 and be mixed together. When the person using the dispenser releases the pump organ, it is pivoted back into the rest position by the springs 227b, 241. Pasty product components from the two reservoirs 221, 223 are sucked in through the inlet valves 229 into the pumping chambers 239. Sucking product components out of the two accumulators 221, 223 in cooperation with the air present between the two pistons 217, 219 has the result that the lower piston 217 is displaced downwards and the upper piston 219 is displaced upwards, air being expelled the environment flows through the hole 205g into the cavity between the two pistons.

Since the pump member 231 is pivotally connected to the support 213 by the hinge 245, the volumes of the two pumping chambers 229 are always exactly the same each time the pump member is pressed down manually, regardless of the pressure point at which a person presses the pump member Ratio changed. Accordingly, the ratio of the quantities of the two product components pumped out each time the pumping element is actuated is always exactly 1: 1.

Unless otherwise stated above, the dispenser 201 has other properties similar to those of dispenser 1 and in particular 101.

The dispenser 301 shown in FIG. 13 is partly quite similar to the dispenser 201 according to FIGS. 8 to 11 and has a container 303 with a can 305, at the upper end of which a pump device 311 is arranged. This has again a support 313 with a plate-shaped support part 313a fastened to the edge of the can and provided with two holes 313d, 313e penetrating it. The hole 313d consists of an eccentrically arranged, straight bore. The hole 313e penetrates the support part 313a in a Z-shape and has an opening on the lower side of the support part 313a which is coaxial to the axis of the container 303 and an eccentric opening on the upper side of the support part 313a. A hollow cylindrical connecting piece 361 coaxial with the container axis has at the upper end an outwardly projecting collar 361a, which is seated and fastened in the lower mouth of the hole 313e, and a continuous axial hole 361c. A first, lower piston 317 and a second, upper piston 319 are each displaceably guided in the container 303, each with a hole 317a or 319a coaxial to the container axis and penetrated by the nozzle 361. A first accumulator 321 is present in the container 301 between its base and the first piston 317, and a second accumulator 323 is provided between the support 313 and the second piston 319. A sleeve 325 is inserted and fastened in each of the upper mouths of the holes 313d, 313e. The sleeves 325 are designed similarly to the sleeves 225 previously described and in particular have a through hole 325c with a section serving as a valve seat 325d. Otherwise, the two sleeves 325 are arranged, for example, symmetrically to the axis of the container 303.

A pump member 331 has a one-piece body 333, which essentially consists of an elastically deformable membrane 333a with an outlet and / or valve hole 333c. The body 333 still has connecting means 333d. These consist, for example, of holding sections, which together form a ring, ie a ring divided by slots, protrude away from the membrane 333a against the support part 313a and for the most part enclose the hole 333c. The disk 335 belonging to the pump organ has an annular holding groove with an undercut in its connecting region 335d. The one with the Membrane 333a connected holding sections are latched and anchored in the holding groove and in particular also engage behind their undercut. The two sleeves 325 and the disk 335, together with rings 343 corresponding to rings 243, delimit two pump chambers 339. The first reservoir 321 is formed by a first passage 351 formed by hole 313d and hole 325c of the sleeve 325 located thereon 13, first pump chamber 339 located on the right. The holes 361c, the hole 313e and the hole 325c of the sleeve 325 located at the latter together form a second passage 353 which connects the second reservoir 321 to the second pump chamber 339 located on the left in FIG.

Unless otherwise stated above, the dispenser 301 shown in FIG. 13 can be configured similarly to the dispenser 201 described with reference to FIGS. 8 to 11.

The dispenser 401 shown in FIGS. 14 and 15 has a container 403 with a can 405 which has a bottom 405a and a generally circular-cylindrical jacket 405b.

A pump device 411 has a one-piece support 413 with a generally plate-shaped support part 413a. The support rests at its edge on the upper edge surface of the casing 405f of the can 405 and with a ring projecting downwards against an inner surface section of the casing 405b and is fastened tightly to it, namely welded on. In contrast to the plate-shaped support parts or plates of the previously described dispenser exemplary embodiments, the plate-shaped support part 413a is not horizontal, but slightly inclined against a horizontal plane - for example at most 10 ° - and thus forms an angle different from 90 ° with the axis of the container. The plate-shaped support part 413a is connected to a connection piece 413b which projects away from it and into the vicinity of the base 405a and is coaxial to the axis of the container 403. The support 413 is provided with a passage 413c which extends from the lower end of the connecting piece 413b to the upper side of the support part 413a and thus penetrates the latter. The support part 413a has a section offset downwards in the central region, so that its otherwise flat upper side or surface has a recess 413e there. In this, however, there is an annular projection or collar which projects upwards from its base and surrounds the upper mouth of the passage 413c and forms a valve seat 413f. The support 413 also has an annular extension projecting downward from the support part 413a, which has a horizontal edge at its lower end and serves as a stop 413g for a piston 417. The support 413 also has an upwardly projecting, annular projection 413h at the edge of the plate-shaped support part 413a with an annular upwardly open holding groove 413i. This has a small undercut near its base, which can be seen particularly clearly in FIG. 18.

The piston 417 already mentioned, which is displaceable in the container 403 between the base 405a and the plate-shaped support part 413a, has a hole 417a penetrated by the connector 413b in the center and forms the upper boundary of a reservoir 421 present in the container. In the recess 413e there is a flat one Disc existing closure body 427 movable, which forms the inlet valve 429 together with the valve seat 413f and springs described.

The pump device 411 in turn includes a pumping element 431 with a one-piece, relatively soft, elastic body 433 and a one-piece, at least generally dimensionally stable disk 435 arranged underneath it. The body 433 is also wholly or partly in FIGS. 17, 18 and 19 evident. The disk 435 is shown separately in FIG. 16 and also in whole or in part in FIGS. 17 to 19. The body 433 forms a membrane 433a with an eccentric outlet and / or valve hole 433c and this connecting means 433d, which largely encloses this. These are formed by a plurality of, for example four to ten, resilient holding sections 433g, each of which consists of a rib which projects downward from the membrane 433a and is curved in the outline in plan view. The holding sections 433g together form a circular ring which is divided by slots. The edge section 433h of the membrane 433a lies on the radial surface of the ring-shaped support projection 413h which is radial to the container axis and has a downwardly projecting holding section 433i consisting of an annular rib, or a plurality of arc-shaped holding sections 433i which together form a ring. The or each holding section 433i is latched into the holding groove 413i in an elastically deformable manner and engages behind the undercut thereof. The edge section 433h of the membrane 433a is thereby firmly and tightly connected to the support 413. The membrane has a central, largely flat and horizontal main section in the idle state of the pumping goose and a narrow, ring-shaped deformation area 433k connected to the edge section 433h attached to the support 413, which is conically inclined downwards and outwards in the idle state.

Disk 435 is generally circular. The diameter of the disk 435 is at least 80% and, for example, at least 90% of the inner diameter of the shoulder 413h. As can be seen particularly clearly in FIG. 16, the disk 435 has a main section 435a and a smaller outlet section 435b, which is arranged eccentrically to its center and to the container axis, with a circular outline. The center of the outlet section 435b is located under the outlet and / or valve hole 433c of the membrane 433a. The outlet portion 435b is in a hole 433c in plan for the most part enclosing connection area 435d is firmly connected to membrane 433a by connecting means 433d. The disc 435 has in the connection area on its side facing the membrane 433a an annular holding groove 435 which has an undercut between its opening opening into the surface of the disc and its base. The holding groove 435g is divided into two arcuate parts at two circumferential locations by a groove 433h which is provided on the upper side of the outlet section 435f and runs radially to the hole 433c. The grooves 435e, 435f have, for example, the same depths. Each elastically deformable holding section 433g connected to the membrane 433a is snapped into the holding groove 435e in such a way that it projects into the latter and engages behind the undercut. The holding sections 433g are distributed along the holding groove 435e in such a way that there are free spaces between the holding sections 433g in the region of the grooves 435f crossing them.

The disc 435 is completely flat on its lower side facing the support part 413a and is horizontal in the idle state shown in FIGS. 14, 17, 18, 19. On its upper side, the disc 435 is also generally flat, but has a small elevation 435g in the area under the outlet and / or valve hole 433c, which is particularly clearly visible in FIGS. 18 and 19. The elevation 435g is, for example, frustoconical and bounded in the central area by a flat surface which is horizontal in the idle state of the pumping goose, at the edge of which adjoins a slightly conically downwardly inclined surface which extends to the inner edges of the arcuate holding grooves 435e. The disc 435 is also provided on its upper side with a conical bevel at its edge, against which the conical deformation region 433k of the membrane 433 bears in the idle state.

The pump member 431 is arranged with respect to the support 413 such that the outlet portion 435b of the disk 435 is located above the uppermost region of the inclined, plate-shaped support 413a. The outlet section 433b is connected to the main section 435a at its circumferential area closest to the center of the disk 435 by a web 435i which is curved in plan. The web is delimited on its upper side by the bottom of an arcuate groove 435k. The outline or edge region of the outlet section 435b facing away from the web 435i partly borders on the surroundings of the disk 435 and thus forms part of the edge thereof. The remaining areas of the outline or edge of the outlet section 435b are formed by two slits 435m which are cut from the edge of the pane and are curved in outline. The web 435i extends in the floor plan - i.e. in a plan view of the side of the disk 435 facing the membrane - over a central angle around the center of the hole 433c which is at most 90 ° and for example at most or approximately 60 °. Accordingly, the outlet section has a free edge which is not connected to the main section 435a and extends along a central angle of at least 270 °. The web 435i is more or less bendable in comparison to the pane sections connected by it and adjoining it, and thus forms a type of flexible joint.

It should also be mentioned that the web 435i could possibly be replaced by two or more narrower webs, separated from one another by slots. These should then all be arranged on the half of the circumference of the outlet section that is closest to the disk center and should preferably extend together at most over a central angle of 90 °.

The main section 435a of the disk 435 is also provided with two elongated slots 435n. These are included in the floor plan each an elongated, wavy spring 435p, which is connected at one end to the remaining disk 435. The springs 435b thus consist of a one-piece body together with the disk. The springs in the plan are somewhat narrower than the slots 435n, so that in each slot 435n a U-shaped gap, which partially surrounds the spring present in the plan, remains free. The flat end sections of the springs which are not connected to the disk are located below the remaining disk 435 and engage the closure body 427 of the inlet valve 429. The springs 435p on the one hand press the closure body 427 against the valve seat 413f and on the other hand the disk 435 or - to be more precise - the non-self-forming disk part upwards away from the support part 413a. Each U-shaped slot 435n is connected by a groove 435q provided on the upper side to the arcuate slot 435m located closer to it.

As already mentioned, the disk 435 is generally dimensionally stable. The disk is in particular - at most with the exception of the web 435i and the springs 435p - and thus at most of its surface facing the membrane 435a stiffer than the membrane 433a.

The section of the membrane 433a provided with the outlet and / or valve hole 433c and with the connecting means 433d forms, together with the outlet section 435b of the disk 435, the outlet valve 437. A pump chamber 439 is present between the plate-shaped support part 413a and the pump element 431, into which the lockable passage 413c of the inlet valve 429 opens. Each slot 435m present in the disk 435 forms, together with the groove 435f connected to it, a passage 441 which defines the pump chamber 439 with the surface area of the disk, which is largely enclosed by the connecting area 435d and apart from the grooves 435f and faces the membrane 433a 435 connects. The Grooves 435f form the mouths of the passages 441 opening into the last-mentioned pane surface area. Incidentally, the slots 435n together with the grooves 435q form branches of the two passages 441 and therefore also belong to these.

The dispenser 401 also has a cover 447 which is detachably screwed onto the can 405 and is only shown in FIG. 14.

After the various parts of the dispenser 401 have been produced, the pasty product 451 to be dispensed is poured into the can 405, which is still separate from the pumping device. Thereafter, the previously assembled pump device 411 - i.e. the support 413 together with the piston 417 held on the nozzle 413b and the pumping element 431 connected to the support - plugged into or into the socket. Then the support 413 is welded to the can 405 and / or glued. The amount of the pasty product 451 previously filled into the can is dimensioned such that, when the pump device is mounted, it fills the reservoir 421 and the passage 413c, flows through the inlet valve 429 into the pumping chamber 439 and also this, the passages 441 Slots 435n and the grooves 435q fills. The air previously present in the pump chamber can flow out through the slots 435m, 435n, groove 435q, 435f and the outlet and / or valve hole 433c.

If, when using the dispenser 401, a person presses the pump organ 431 manually, that is to say with at least one finger, it can be moved - with sufficient pressure - downward, for example, until it is on the lower side or surface of the disk 435 on the plate-shaped support part 413a rests. The disc 435 is both shifted downwards and pivoted, the one in FIGS. 14 and 18 being on the right side Section of the deformation region 433k of the membrane serves as a flexure to a certain extent.

In the inoperative state of the pumping goose 431 shown in FIGS. 14, 17, 18, 19, the membrane 433a rests on the upper side of the disc 435 on the entire flat surface in front of it and also on the bevel present at the edge of the disc. The main section of the membrane 433a enclosed by the deformation region 433k is flat when the membrane is relaxed and separated from the disk. However, the elevation 435g pushes the portion of the membrane 433a located in its area upwards, so that the elastic membrane is tensioned there and in a region which completely surrounds the edge of the outlet and / or valve hole 433c and surrounds it with a certain tension 435g is applied to the elevation and thereby the outlet valve 437 closes well and tightly.

If a person presses the pumping element against the plate-shaped support part 413a in the manner already described, however, the pasty product 451 present in the pumping chamber can lift the membrane 433a in the region of the outlet section 435b of the disk 435 analogously to the previously described accumulators , so that pasty product can flow from the grooves 435f to the outlet and / or valve hole 433 and through this to the outside. The part of the membrane 435 which is located above the main section 435a of the disk 435, on the other hand, is still at least largely in contact with the disk even when the pumping goose is pressed down. The web 435i connecting the main section 435a and the outlet section 435b of the disk 435 and serving as a flexible joint makes it easier for the membrane and the disk to adapt well to one another when pressed down. Unless otherwise previously written, the dispenser 401 has similar properties to the dispenser 1.

The disk 435 of the dispenser 401 can be replaced by the disk 535 shown in FIG. This differs from the disk 435 in that the slots 435m and the grooves 435f, 435q are missing and four of them each have a circular hole, i.e. Passages 535c existing in a bore are distributed in the floor plan around the outlet and / or valve hole of the membrane, not shown in FIG. 20, located above the disk 535. The passages 535c and, in particular, their openings opening into the surface of the disk 535 facing the membrane are, of course, in turn at a distance from the outlet and / or valve hole of the membrane or - more precisely - from the edges of this hole. The passages 535c open, for example, into the conical surface of the truncated cone-shaped elevation 535g of the disk 535. Moreover, the retaining groove 535e present in the connecting area 535d of the disk 535 in the disk 535 consists of an outlet and / or valve hole in the membrane and the passages 535d completely and uninterrupted enclosing ring groove with an undercut. The connecting means of the membrane, not shown, have an annular holding section or some, for example about four to ten holding sections, each consisting of an arcuate rib and evenly distributed along the annular holding groove 535c and anchored in the latter. Apart from the differences described above, the disk 535 can be designed the same or similar to the disk 535.

The pump element 631 shown in FIG. 21 has a one-piece body 633, which is only partially indicated by dash-dotted lines and which forms a membrane 633a with an outlet and / or valve hole 633c. The pump member 631 includes two disks 635 and 643 arranged under the membrane. These disks 635 and 643 have similar outline shapes and are similarly arranged to the outlet section 435b and the main section, respectively 635a of the disc 635, but the two discs 635, 643 are completely separated from one another by an arcuate slot 645. The disk 635 has around its center and around the outlet and / or valve hole 533c of the membrane located above it, each of which has a circular hole, that is to say a bore, passages 635c and is sealed in a connecting region 635d which completely surrounds this by connecting means connected to membrane 635a. In the connection area, the disk is provided, for example, with an annular holding groove 535e which has an undercut and in which a holding section belonging to the body 633 and connected to the membrane 533 is latched and anchored. The disk 635 together with the membrane 633a forms the outlet valve 637. The disk 643 has a holding hole 643a approximately in the middle between the disk 635 and its circumferential location facing away from it. This consists of a hole that is provided with an extension at the lower end. The body 633 has the membrane 633a with the disk 543 connecting means, namely a molded on the membrane 533a, locked in the holding hole 643a and anchored in this.

The pump device, to which the pumping element 631 belongs, also has a support, which is designed, for example, similarly to the support 413 and which, for example, forms an inlet valve together with a closure body designed similarly to the closure body 427. The pump device can also have a leaf spring or other spring consisting of a separate body, which acts on the disk 643 and / or possibly on the disk 635 and on the closure body mentioned and corresponds functionally to the springs 435p. Unless otherwise specified previously, the pumping device and the dispenser, to which the pumping element 631 belongs, can be designed similarly and have similar properties to the pump device 411 or the dispenser 401.

As already mentioned in the introduction, a dispenser according to the invention can also be used to dispense a liquid product. In this case, the dispenser can be arranged, for example, in such a way that the pump organ is located on the lower side of the dispenser. If, for example, a dispenser is used to dispense liquid soap, it can be attached with a pump organ underneath it over a washbasin.

The design of the donors can be changed in other ways within the scope of the invention. For example, features of dispensers 1, 101, 201, 301, 401, disc 535 and pump goose 631 can be combined in a variety of ways. For example, in the case of the dispensers 1 and 101, similarly to the dispensers 201, 401, at least one spring can be provided in or next to the or each pumping chamber, which, for example, engages the rigid disc of the pumping goose and pushes it away from the support part opposite it. In addition to the restoring force generated by the elasticity of its membrane, the or each spring then exerts a restoring force on the pump member. This can be particularly advantageous if the product to be pumped has a very high viscosity.

Furthermore, the outlet and / or valve hole 33c of the dispenser 1 can possibly be arranged more eccentrically or in the center of its membrane 33a. Furthermore, the outlet and / or valve hole 133c, 233c, 333c of the dispenser 101 or 201 or 301 can be arranged eccentrically with respect to the can 105 or 205 or 305 and the membrane 133a or 233a or 333a, whereby but the outlet and / or valve hole for such changes in the dispensers 101, 201, 301 expediently in the The middle should lie between the two pumping chambers 139, 239 and 339.

The dispensers 101, 201, 301 can also be modified such that the two product components are donated and mixed with each other instead of in a ratio of 1: 1 in any other ratio. For this purpose, the two pumping chambers are made of different sizes, so that the ratio of their volumes or - more precisely - interior volumes and the ratio of their inner surfaces measured in the floor plan is the same as the ratio with which the components are to be donated. The volume ratio of the two stores is then also made approximately or exactly equal to the desired ratio of the components to be dispensed.

This can be done, for example, starting from the dispenser 101 by replacing the diametrical rib 135k and the diametrical dividing wall 105h by a rib or dividing wall with two radial sections which form an angle with one another and are contiguous with the axis of the can, so that the between the Plate 113a and the pump organ 131 existing cavity and the interior of the can in the floor plan are each divided into two different sized circular sectors. Instead, one could also provide a rib or partition, which is straight but eccentric and thus forms a chord of the can jacket in the plan, which is shorter than the inside diameter of the can jacket.

If, for example, a dispenser, which like the dispenser 201 has pistons and accumulators arranged one above the other, is to be provided for dispensing product components with a quantity ratio different from 1: 1, the outer diameter of the main sleeve sections 225a and the inner diameter of the rings can be used 243 for the two pumping chambers dimension differently and set the initial positions of the two pistons accordingly.

If the accumulator and piston are arranged next to one another, as in the case of the dispenser 101, it is also possible, if necessary, to provide more than two separate accumulators and the same number of separate pumping chambers, and then to store more than two product components separately and to mix them when they exit the dispenser.

Furthermore, the shells of the cans and lids can have outer and / or inner surfaces which - apart from their threads serving for screwing together - are not circular cylindrical, but are, for example, elliptical, oval or polygonal in cross section.

Furthermore, the dispensers 1, 101 and 401 can be changed such that the or each accumulator is located between the pump device and the one or the pistons, so that the or each piston, when the accumulator is full, is the most distant from the pump device Has position and shifts towards the pumping device when pumping out the product. In this case, the wall of the container can be provided in the vicinity of its side facing away from the pumping device with a ventilation opening through which air can flow into the container when the or each piston is excited. Possibly one can even dispense with a wall part corresponding to the can base 5a or 105a or 405a and only provide means at the relevant end of the container casing in order to secure the piston or pistons against falling out. The container would then be essentially open on its side facing away from the pumping device, ie only closed by the piston or pistons. For this purpose, the support part corresponding to the plate-shaped support part or the plate 13a or 113a 413a could possibly consist of an integral body together with the casing of the container. Instead of that by the In this case, passages 13b, 113b, 413b running through are only to be provided for passages penetrating the plate-shaped support part. Such a design of the dispenser is particularly advantageous if, when using the dispenser, the pump organ is on its lower side, as is useful, for example, in the case of a dispenser for liquid soap.

In the dispenser 201, the nozzle 213c which improves the guidance of the pistons but is not absolutely necessary for removing the product component stored in the memory 223 can be omitted.

In the case of the dispensers described above, the or each store consists of a storage chamber which is delimited by a dimensionally stable wall and a displaceable piston and which is at least reasonably and preferably completely gas-tight against the environment. However, the or each store can also be at least partially and, for example, essentially completely delimited by a flexible sheath and sealed gas-tight to the environment and thus be formed by the interior of a bag, which is provided, for example, with a connection consisting of a piece of hose or socket and is connected via this to a connection of the or an inlet valve. The bag can be arranged, for example, in a container having a dimensionally stable wall with at least one ventilation opening, so that the ambient air has access to the outer surface of the envelope and this is compressed by the air pressure when the product is pumped out of the store. The connections of the inlet valves and bags can also be detachably connected to one another and the containers can be designed such that the users of the dispensers can each replace the empty bags with full bags.

The annular holding sections of the connecting means of the membranes can also form polygonal or polygon-like, closed or interrupted rings, in which the polygon corners are replaced by curved transitions. Furthermore, in the case of the dispensers 1, 101, 201, instead of holding sections closed in the form of a ring, a separate head-like holding section protruding radially beyond the pin, at least in parts of the pin circumference, protruding for each pin of the fastening means. The configurations of the parts connected to the membranes by the connecting means must then be adapted accordingly.

In the case of the inlet valves having a membrane and the outlet valves, the number of passages penetrating the plate-shaped support part or the disk can of course also be varied. For example, the disk 35 belonging to the outlet valve 37 could have more than two passages 35c or only one. Furthermore, the membrane 33a, 133a, 233a, 333a, 433a, 633a can even be provided with two or more outlet and / or valve holes, which then together form the outlet of the dispenser in question.

Claims (21)

Pumping device for a flowable, in particular pasty or liquid product (51, 151, 153, 451), with a one having an elastically deformable membrane (33a, 133a 233a, 333a, 433a, 633a) against a restoring force against a support part (13a, 113a , 213a, 313a, 413a) pushable pump element (31, 131, 231, 331, 431, 631) and a pump chamber (39, 139, 239, 339) between this and the support part (13a, 113a, 213a, 313a, 413a) , 439) which have an inlet valve (27, 127, 229, 429) and an outlet valve (37, 137, 237, 337, 437, 637) with an outlet hole (33c, 133c, 233c, 333c, 433c, 633c) , characterized in that the outlet hole (33c, 133c, 233c, 333c, 433c, 633c) penetrates the membrane (33a, 133a, 233a, 333a, 433a, 633a) and that the pump chamber (39, 139, 239 , 339, 439) facing side a disc (35, together with the membrane (33a, 133a, 233a, 333a, 433a, 633a) forming the outlet valve (37, 137, 237, 337, 437, 637) 135, 235a, 335a, 435, 535, 635) and is connected to the membrane (33a, 133a, 233a, 333a, 433a, 633a) in such a way that the latter in a closed position in an outlet hole (33c, 133c, 233c , 33c, 433c, 633c) surrounding area on the disc (35, 135, 235a, 335a, 435, 535, 635) and partially in a release position by a pressure exerted on it by the product (51, 151, 153, 451) bulging away from the disk (35, 135, 235a, 335a, 435, 535, 635) and a connection between its outlet hole (33c, 133c, 233c, 33c, 433c, 533c) and the pump chamber (39, 139, 239, 339, 439) can release. Pump device according to claim 1, characterized in that the membrane (33a, 133a, 233a, 333a, 433a, 633a) into its outlet hole (33c, 133c, 233c, 333c, 433c, 633c) at least around the largest part of its circumference connection area enclosing at a distance (35d, 235d, 335d, 435d, 535d, 635d) is firmly connected to the disc (35, 135, 235a, 335a, 435, 535, 635) so that the disc (35, 135, 235a, 335a, 435, 535, 635) has at least one it has a penetrating passage (35c, 135c, 235c, 441, 535c, 635c) which connects the pump chamber (39, 139, 239, 339, 439) with an at least partially from the connecting area (35d, 235d, 335d, 435d, 535d, 635d ) enclosed, the membrane (33a, 133a, 233a, 333a, 433a, 633a) facing surface area of the disc (35, 135, 235a, 335a, 435, 535, 635), and that in the said surface area of the disc (35 , 135, 235a, 335a, 435, 535, 635) opening of the or each passage (35c, 135c, 235c, 441, 535c, 635c) in a plan view of the membrane (33a, 133a, 233a, 333a, 433a, 633a) is at a distance from the outlet hole (33c, 133c, 233c, 333c, 433c, 633c). Pump device according to claim 2, characterized in that at least two passages (35c, 135c, 235c, 441, 535c, 635c) penetrating the disc (35, 135, 235a, 335a, 435, 535, 635) are present, which are at around the Points distributed around the outlet hole (33c, 133c, 233c, 333c, 433c, 633c) open into said surface area of the disk (35, 135, 235, 335, 435, 535, 635). Pump device according to claim 2 or 3, characterized in that the or each passage (35c, 135c, 235c, 535c, 635c) penetrates the disc (35, 135, 235a, 335a, 535a, 635) and opens into the surface area mentioned Hole. Pump device according to claim 2 or 3, characterized in that the or each passage (441) has a groove (435f) which is present in the side of the disk (435) facing the membrane (433) and which extends partially from the connecting area (435d ) enclosed surface area into a surface area outside the connection area (435d) Surface area extends and is connected through the disc (435) to the pump chamber (439). Pump device according to one of claims 1 to 5, characterized in that the disc (435) has a main section (435a) and an eccentrically arranged to its center, smaller outlet section (435b) which is connected to the membrane (433a) and by at least one The web (435i) is connected to the main section (435a) and, in a plan view of its side facing the membrane (433a), has a free edge which extends over a center angle of at least 270 ° around the center of the outlet hole (433c). Pump device according to one of claims 1 to 6, characterized in that the disc (35, 135, 235a, 335a, 435, 535) in a plan view of it at least 50% of that of the pump chamber (39, 139, 329, 339, 439 ) covered area or that in addition to the disk (635) forming the outlet valve (637) together with the membrane (633a), another disk (643) is attached to the membrane (633a) and the two disks (635, 643) together cover at least 50% of the area occupied by the pump chamber and that the or each disk (35, 135, 235a, 435, 535, 635, 643) connected to the membrane (33a, 133a, 233a, 333a, 433a, 633a) , at least when it is in its position furthest away from said support part (13a, 113a, 213a, 313a, 413a), at least with most of its surface facing the membrane (33a, 133a, 233a, 333a, 433a, 633a) abuts the membrane (33a, 133a, 233a, 333a, 433a, 633a). Pump device according to one of claims 1 to 7, characterized in that the disc (35, 135, 235a, 335a, 435, 535, 635) at least one in the closed position of the membrane (33a, 133a, 233a, 333a, 433a, 633a ) around their outlet hole (33c, 133c, 233c, 333c, 433c, 533c) this adjoining area is stiffer than the area of the membrane (33a, 133a, 233a, 333a, 433a, 633a) surrounding the outlet hole (33c, 133c, 233c, 333c, 433c, 533c) and that the disc (35, 135, 235a, 335a, 435, 535, 635) and an optionally additionally present disc (643) connected to the membrane (633a) is stiffer than this at least for most of its surface facing the membrane (33a, 133a, 233a, 333a, 433a, 633a) is. Pump device according to one of claims 1 to 8, characterized in that the membrane (33a, 133a, 233a, 333a, 433a, 633a) consists of a material whose modulus of elasticity is smaller than the modulus of elasticity of the or each with the membrane (33a , 133a, 233a, 333a, 433a, 633a) connected disc (35, 135, 235a, 335a, 435, 535, 635, 643) forming material, the membrane (33a, 133a, 233a, 333a, 433a, 633a) as well the disc (35, 135, 235a) consist of an injection-moldable, thermoplastic. Pump device according to one of claims 1 to 9, characterized in that the disc (35, 135, 235a) has continuous anchoring holes (35f) distributed around the outlet hole (33c, 133c, 233c) of the membrane (33a, 133a, 233a) and that the membrane (33a, 133a, 233a) is connected to the pegs (33f) penetrating the anchoring holes (35f), which are connected at their end adjoining the pumping chamber (39, 139, 239) with at least one holding section (33g) which adjoins the side of the disk (35, 135, 235a) facing the pump chamber (39, 139). Pump device according to one of claims 1 to 9, characterized in that the disc (335a, 435, 535, 635) on its side facing the membrane (333a, 433a, 633a) has at least one holding groove (435e, 535e, 635e) which has an undercut between its opening facing the membrane (333a, 433a, 633a) and its base, and that the membrane (333a, 433a, 633a) has at least one holding section (433g) which consists of a one-piece body (333, 433, 633) and which projects into the holding groove (435e, 535e, 635e) and engages behind the undercut. Pump device according to one of claims 1 to 11, characterized in that the membrane (33a, 133a, 433a, 633a) has an outlet hole (33c, 133c, 433c, 633c) and the disc (35, 135, 435, 535, 635) enclosing, firmly and tightly connected to the support part (13a, 113a, 413a) edge portion (33h, 433h). Pump device according to one of claims 1 to 11, characterized in that the disc (235a, 335a) is pivotally connected to the support part (213a, 313a) by a hinge (245). Pump device according to one of claims 1 to 13, characterized by at least one disk (2353) engaging the disk (235a, 335a, 435, 535, 635) and / or an additional disk (643) attached to the membrane (633a) , 335a, 435, 535, 635, 643) spring (227b, 241, 435p) pushing away from said support part (213a, 313a, 413a). The pump device according to claim 14, wherein a passage (251, 319) that penetrates said support part (213a, 313a, 413a) and opens into the pumping chamber (239, 339, 439) and forms a valve seat (225d, 413f) of the inlet valve (229, 429) 253, 413c) and wherein the inlet valve (229, 429) has a movably held closure body (227, 427), characterized in that the spring or at least one (227b, 435p) of the springs (227b, 435p) the closure body (227, 427) presses against the valve seat (225d, 413f). Pump device according to one of claims 1 to 14, wherein said support part (13a, 113a) has a passage (13c, 113c) penetrating it, characterized in that on the side of the support part (13a, 113a) facing the pumping chamber (39, 139) ) a membrane (25a, 125a) serving to form the inlet valve (27, 137) is arranged together with its passage (13c, 113c) and has at least one side of the opening (13c, 113c) of the support part (13a , 113a) has an offset valve hole (25c, 125c) and, for example, at least two valve holes (25c, 125c) distributed around the mouth of the passage (13c, 113c) of the support part (13a, 113a) and in one of these mouths and this at least one valve hole (25c, 125c) surrounding connection area (13d, 113d) is firmly and tightly connected to the support part (13a, 113a). Pump device according to one of Claims 1 to 16, characterized in that at least two pump chambers (139, 239, 339) which are separate from one another are present between said support part (113a, 213a, 313a) and the pumping element (131, 231, 331), each of which is connected to an inlet valve (127, 229) and that all pumping chambers (139, 239, 339) are connected to the same outlet hole (133c, 233c, 333c) when the outlet valve (137, 237) is open. Pump device according to claim 17, characterized in that the support part (213a, 313a) for each inlet valve (229) with a passage (251, 253, 351, 353) penetrating it and with one opening into the associated pump chamber (239, 339) Mouth-limiting sleeve (225, 325) projecting against the disk (235a, 335a) is provided, which forms a valve seat (225d) and in which a closure body (227) is arranged to be movable along its axis, and that the pump element (231, 331) for each inlet valve (229) one tightly connected to the disc (235a, 335a) and the Has sleeve (225) tightly enclosing ring (243) forming part of the boundary of a pump chamber (239). Dispenser with a pump device according to one of claims 1 to 18, characterized in that the or each pump chamber (39, 139, 239, 339, 439) via the inlet valve (27, 127, 229, 429) with a memory (21, 121, 221, 223, 321, 323, 421) is connected. Dispenser according to claim 19, characterized in that a bottom (5a, 105a, 205a, 405a) and a jacket (5b, 105b, 205b, 405b) which is firmly connected to said support part (13a, 113a, 213a, 313a, 413a) ) comprising the can or each store (21, 121, 221, 223, 321, 323, 421) is present, that the or each store (21, 121, 221, 223, 321, 323, 421) partly through a piston (17, 117, 217) guided in the can (5, 105, 205, 305, 405) along the jacket (5b, 105b, 205b, 405b) , 219, 317, 319, 417) and that the or at least one accumulator (21, 121, 221, 321, 421) on the bottom (5a, 105a, 205a, 405a) and on the or a piston ( 17, 117, 217, 317, 417) and through a pipe (13a, 113a, 213a, 313a, 413a) which penetrates it and extends from the support part (13a, 113a, 213a, 313a, 413a) to the vicinity of the base (5a, 105a, 205a, 405a) , 113b, 213b, 361, 413b) with the or an inlet valve (27, 127, 229, 429) connected is. Dispenser according to claim 20, characterized in that two pistons (217, 219, 317, 319) and two accumulators (221, 223, 321, 323) are present in the can (205, 305) such that the two pistons (217 , 219, 317, 319) between the bottom (205a) and the support part (213a, 313a) one above the other and that the one reservoir (223, 323) is between the support part (213a, 313a) and the piston located closer to it (219, 319).

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