US3212425A - Forced flow ventilator - Google Patents

Forced flow ventilator Download PDF

Info

Publication number
US3212425A
US3212425A US204575A US20457562A US3212425A US 3212425 A US3212425 A US 3212425A US 204575 A US204575 A US 204575A US 20457562 A US20457562 A US 20457562A US 3212425 A US3212425 A US 3212425A
Authority
US
United States
Prior art keywords
damper
stack
ventilator
fan
side walls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US204575A
Inventor
John O Hazen
Robert G Lindner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HH Robertson Co
Original Assignee
HH Robertson Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HH Robertson Co filed Critical HH Robertson Co
Priority to US204575A priority Critical patent/US3212425A/en
Application granted granted Critical
Publication of US3212425A publication Critical patent/US3212425A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Definitions

  • This invention relates to a forced llow ventilator and more particularly to a forced flow ventilator having freely pivotal dampers for sealing the ventilator gas passageways when the fan is not operating.
  • a ventilator having a ventilator stack which terminates in an external flange at its upper edge.
  • the stack is adapted to surround a curb of a ventilator opening in a roof of a building.
  • a cap member is maintained upwardly spaced from the stack by means of vertical support members.
  • a fan and its associated drive means are mounted within the stack for withdrawing gases from the interior of the building.
  • the gases to be exhausted are drawn through the stack and are subsequently discharged horizontally through at least one gas passageway.
  • the gas passageway is positioned between at least one adjacent pair of the vertical support members and above the external flange and below the cap member.
  • a substantially vertically disposed damper which is substantially the same size as the gas passageway.
  • the damper is positioned externally of the gas passageway and is pivotally secured along its upper edge to the adjacent pair of vertical support members.
  • the damper has magnet means secured thereto, preferably on the external surface thereof, which are adapted to be attracted to portions of the ventilator structure surrounding the gas passageway.
  • the magnet means have sufficient strength to hold the damper in sealing relation with the gas passageway only when the fan is not operating.
  • the damper also is provided with an outwardly extending flashing member along its bottom edge.
  • the flashing member serves three functions. Namely, (a) it serves to seal the lower edge of the gas passageway when the damper is in a closed position by engaging the external flange; (b) it serves to maintain the damper spaced from the cap member so that the magnet means cannot be magnetically engaged thereon to hold the damper in an open position; and (c) it serves as a torsening member for the damper.
  • FIGURE 1 is a cross-sectional view, taken along the line 1-1 of FIGURE 2, illustrating the interior structure of the present ventilator;
  • FIGURE 2 is a plan view, drawn on a smaller scale, of the ventilator of FIGURE l illustrating a cap member;
  • FIGURE 3 is a cross-sectional view, drawn on a smaller scale, taken along the line 3-3 of FIGURE 1, illustrating a stack of the present ventilator
  • FIGURE 4 is a fragmentary isometric view illustrating a freely pivotal damper and associated magnet means engaged with a vertical support member.
  • a generally horizontal roof of a buliding is indicated by the numeral 10.
  • the roof 10 is constructed of structural elements 12 which may include concrete, metal beams, lumber or similar materials of construction.
  • An opening 14, usually of rectangular configuration, is provided in the roof 10.
  • the opening 14 is surrounded by a curbing 16 which extends above the upper level -of the roof 10.
  • a weatherproof coating or surface 18 is provided above the structural elements 12 to Iserve as a weather-proong skin over the exposed surface of the building.
  • the coating 18 may comprise tile, cement, bituminous materials, asbestos materials and the like.
  • the present force flow ventilator is indicated by the numeral 20 and generally comprises a stack 22, vertical support members 24, a cap member 26, gas passageways 27, and dampers 2S which have magnet means 29 secured thereto and which seal the gas passageways 27.
  • the stack 22 is adapted to surround the curbing 16 of the opening 14 and comprises a curb adapter 30, a fan housing 32 and a weathering skirt 34.
  • the curb adapter 30 rests on the curbing 16 and is secured thereto by any suitable means.
  • the fan housing 32 extends downwardly through the curb adapter 30 and into the opening 14.
  • the fan housing 32 is secured to the curb adapter 30 preferably by means of bolts 35 and includes an outwardly extending ange 36 which rests lon the upper edge of the curb adapter 30.
  • the weathering ⁇ skirt 34 comprises a vertical portion 37 which is secured to the vertical supports 24 preferably by means of bolts 39.
  • the vertical portion 37 terminates along its upper edge in an external flange 40 and terminates along its lower edge in a generally L-shaped flange 41 having one leg thereof resting on and secured to the flange 36 preferably by means of bolts 38.
  • the stack 22 is defined by a plurality lof connected vertical side walls generally designated by the numeral 42 each of which comprises one of the weathering skirts 34, one vertical leg of the fan housing 32 and a vertical wall 43 of the curb adapter 30.
  • the stack 22 has a square cross-section. It should be evident, however, that the stack 22 instead could have a hexagonal, octagonal or other polygon cross-section or even may have a circular cross-section since all of these cross-sections fall within the definition of a stack dened by a plurality of connected vertical side walls.
  • a drive means or electric motor 44 is mounted centrally in the fan housing 32 by means ⁇ of a T-shaped motor support 46.
  • the motor 44 drives a fan 48 about a xed vertical axis so that the gases are drawn from the interior of the building through the opening 14 and the stack 22.
  • each of the vertical support members 24 extend upwardly from a corner 52 of the stack 22 (see FIGURE 3) which in the specification and the claims will be termed a juncture of the adjacent ones of the vertical side walls 42. Specifically the vertical support members 24 are secured at their lower ends to the weathering skirt ⁇ Cap member 26 Referring to FIGURES 1 and 2, the cap member 26 has a generally horizontal top 54 and a plurality of downwardly sloped connected side walls 56 which terminate at substantially the same level as the external flange 40 of the stack 22. Comparing FIGURES 1 and 2, the cap member 26 is frusto-pyramidal in shape and has a square horizontal cross-section.
  • cap member 26 instead could have a hexagonal, octagonal or other polygon cross-section or may even have a circular crossasection since all of these cross-sections may be described as a plurality of downwardly sloped connected side walls.
  • the number lof downwardly sloped connected side Walls 56 of the cap member 26 is equal to the number of vertical connected side walls 42 of the stack 22.
  • the cap member 26 is secured to the upper ends of the vertical support members 24 preferably by means of bolts 58. Thus the cap member 26 may be readily removed when the motor 44 of the fan 48 requires servicing.
  • each gas passageway 27 is disposed between one adjacent pair ⁇ of the vertical support members 24 and above the external flange 40 and below the cap member 26.
  • the peripheral edge of each gas passageway 27 comprises the adjacent pair of vertical support members 24, that portion of the external flange 40 and that portion of the inner surface of the cap member 24 which extend between the adjacent pair of vertical support members 24.
  • dampers 28 are provided to seal the gas passageways 27 when the fan 48 is not operating.
  • the dampers 28 are positioned externally of the gas passageway 27 and are freely pivoted along their upper edge 60 to the adjacent pair of vertical support members 24 by means of a rod 62 extending through an ear 64 secured to each of the support members 24.
  • the dampers 28 preferably are fabricated from lightweight, relatively thin gauge aluminum and hence include an outwardly extending flashing member 66 which serves to stillen the damper 28.
  • the outwardly extending flashing member 66 also serves the second function of sealing the lower portion of the gas passageway 27 by engaging the external flange 40 of the stack 22 as shown in FIGURE 4.
  • the position, indicated by the letter A in FIGURE 4 is the normally closed position of the damper 28 when the fan 48 is not operating.
  • the damper 28 being lightweight, is forced outwardly to ride on the gas stream issuing from the gas passageway 27, in the position indicated by the letter B in FIGURE l.
  • each magnet means 29 is secured to the external surface of the damper 28 adjacent a side 68 thereof which overlies one of the vertical support members 24.
  • the vertical support members 24 preferably comprise a magnetically susceptible material.
  • the magnet means 29 preferably are positioned at the lower edge of the damper 28 adjacent to the flashing member 66 as shown in FIGURE 4.
  • the magnet means 29 should be of suflicient strength to maintain the damper 28 in sealing relation with the gas passageway 27 only when the fan 48 is not operating. When the fan is operating, sufficient gas pressure is built up within the ventilator 20 to overcome the magnetic attraction of the magnet means 29. The damper 28 thus is released and floats in the general position indicated at B in FIGURE 1.
  • the damper 28 is also illustrated in the extreme outward position indicated by the letter C.
  • the flashing member 66 serves the third function of a spacer, i.e., it maintains the damper 28 spaced from the side wall 56 of the cap member 26.
  • the magnet means 29 cannot magnetically engage the side wall 56 to hold the damper 28 in an open position.
  • the present invention provides a forced flow ventilator having freely pivotal dampers which seal the gas passageways when the fan is not operating; which pivot outwardly under the influence of the gas discharged from the stack; and which have magnet means secured thereon whose strength is sufficient to hold the dampers in sealing relation with the gas passageways only when the fan is not operating.
  • the present invention further provides a forced flow ventilator which is relatively inexpensive to manufacture and install; and wherein only the cap member need be removed when the fan and drive means require servicing.
  • a ventilator comprising in combination:
  • a ventilator stack adapted to surround a curb of a ventilator opening in a roof of a building, said stack being defined by a plurality of connected vertical flat side walls, said stack terminating in an external flange at the upper edge thereof;
  • a fan mounted within the said stack for rotation about a fixed vertical axis
  • cap member secured to the upper ends of said vertical support members and having a plurality of downwardly sloped connected side walls terminating at substantially the same level as said external flange and spaced therefrom;
  • damper disposed externally of the said gas passageway, said damper being substantially the same size as said gas passageway;
  • hinge means mounted at the junction of said vertical support members and said cap member beneath the said downwardly sloped connecting side walls, said hinge means pivotally securing said damper at its upper edge;
  • the ventilator of claim 1 including:
  • magnet means secured to the external surface of the said damper and adapted to be attracted to portions of the structure surrounding the said gas passage- Way;
  • said damper comprising a non-magnetic material
  • said magnet means being so positioned and being of suicient strength to hold the said damper in sealing relation with the said gas passageway only when the said fan is not operating.
  • the ventilator of claim 1 including:
  • said damper comprising a non-magnetic material
  • the said adjacent pair of vertical support members comprising magnetic susceptible material
  • said magnet means being so positioned and being of suicient strength to hold the said damper in sealing relation with the said gas passageway only when the said fan is not operating.
  • said hinge means are mounted to the upper ends of the said vertical 5 support members.

Description

United States Patent O 3,212,425 FORCED FLOW vENmAron John 0. Hazen, Monaca, and Robert G. Lindner, Bridgeville, Pa., assignors to H. H. Robertson Company, Pittsburgh, Pa., a corporation of Pennsylvania Filed June 22, 1962, Ser. No. 204,575 6 Claims. (Cl. 98-43) This invention relates to a forced llow ventilator and more particularly to a forced flow ventilator having freely pivotal dampers for sealing the ventilator gas passageways when the fan is not operating.
According to the present invention, a ventilator is provided having a ventilator stack which terminates in an external flange at its upper edge. The stack is adapted to surround a curb of a ventilator opening in a roof of a building. A cap member is maintained upwardly spaced from the stack by means of vertical support members. A fan and its associated drive means are mounted within the stack for withdrawing gases from the interior of the building.
In the present invention, the gases to be exhausted are drawn through the stack and are subsequently discharged horizontally through at least one gas passageway. The gas passageway is positioned between at least one adjacent pair of the vertical support members and above the external flange and below the cap member.
T-o seal the gas passageways when the fan is not operating, a substantially vertically disposed damper is provided which is substantially the same size as the gas passageway. The damper is positioned externally of the gas passageway and is pivotally secured along its upper edge to the adjacent pair of vertical support members. The damper has magnet means secured thereto, preferably on the external surface thereof, which are adapted to be attracted to portions of the ventilator structure surrounding the gas passageway. The magnet means have sufficient strength to hold the damper in sealing relation with the gas passageway only when the fan is not operating. When the fan is started, the built-up gas pressure within the ventilator forces the damper outwardly thereby permitting the exhaustion of the gases. The damper preferably is fabricated from lightweight, relatively thin gauge aluminum.
The damper also is provided with an outwardly extending flashing member along its bottom edge. The flashing member serves three functions. Namely, (a) it serves to seal the lower edge of the gas passageway when the damper is in a closed position by engaging the external flange; (b) it serves to maintain the damper spaced from the cap member so that the magnet means cannot be magnetically engaged thereon to hold the damper in an open position; and (c) it serves as a stiftening member for the damper.
With these remarks in mind, the principle objects of the present invention include:
To provide a forced iiow ventilator having freely pivotal dampers which seal the gas passageways when the fan is not operating;
To provide a force flow ventilator having freely pivotal dampers including magnet means secured thereon whose strength is suiiicient to hold the damper in sealing relation with the gas passageway only when the fan is not operating;
To provide a forced ow ventilator having freely pivotal dampers which pivot outwardly under the inuence of the gases discharged from the stack;
To provide a forced ow ventilator which is relatively inexpensive to manufacture and install; and
To provide a force ow ventilator wherein `only the cap member need be removed in order to service the fan and drive means.
ICC
These and other objects and advantages of the present invention will become apparent from the following detailed description by reference to the accompanying drawings in which:
FIGURE 1 is a cross-sectional view, taken along the line 1-1 of FIGURE 2, illustrating the interior structure of the present ventilator;
FIGURE 2 is a plan view, drawn on a smaller scale, of the ventilator of FIGURE l illustrating a cap member;
FIGURE 3 is a cross-sectional view, drawn on a smaller scale, taken along the line 3-3 of FIGURE 1, illustrating a stack of the present ventilator; and
FIGURE 4 is a fragmentary isometric view illustrating a freely pivotal damper and associated magnet means engaged with a vertical support member.
General Referring to FIGURE l, a generally horizontal roof of a buliding is indicated by the numeral 10. The roof 10 is constructed of structural elements 12 which may include concrete, metal beams, lumber or similar materials of construction. An opening 14, usually of rectangular configuration, is provided in the roof 10. The opening 14 is surrounded by a curbing 16 which extends above the upper level -of the roof 10. A weatherproof coating or surface 18 is provided above the structural elements 12 to Iserve as a weather-proong skin over the exposed surface of the building. The coating 18 may comprise tile, cement, bituminous materials, asbestos materials and the like.
The present force flow ventilator is indicated by the numeral 20 and generally comprises a stack 22, vertical support members 24, a cap member 26, gas passageways 27, and dampers 2S which have magnet means 29 secured thereto and which seal the gas passageways 27.
Stack 22 Referring to FIGURES 1 and 3, the stack 22 is adapted to surround the curbing 16 of the opening 14 and comprises a curb adapter 30, a fan housing 32 and a weathering skirt 34. The curb adapter 30 rests on the curbing 16 and is secured thereto by any suitable means. The fan housing 32 extends downwardly through the curb adapter 30 and into the opening 14. The fan housing 32 is secured to the curb adapter 30 preferably by means of bolts 35 and includes an outwardly extending ange 36 which rests lon the upper edge of the curb adapter 30. The weathering `skirt 34 comprises a vertical portion 37 which is secured to the vertical supports 24 preferably by means of bolts 39. The vertical portion 37 terminates along its upper edge in an external flange 40 and terminates along its lower edge in a generally L-shaped flange 41 having one leg thereof resting on and secured to the flange 36 preferably by means of bolts 38.
Comparing FIGURES 1 and 3 it will be seen that the stack 22 is defined by a plurality lof connected vertical side walls generally designated by the numeral 42 each of which comprises one of the weathering skirts 34, one vertical leg of the fan housing 32 and a vertical wall 43 of the curb adapter 30. In this instance the stack 22 has a square cross-section. It should be evident, however, that the stack 22 instead could have a hexagonal, octagonal or other polygon cross-section or even may have a circular cross-section since all of these cross-sections fall within the definition of a stack dened by a plurality of connected vertical side walls.
A drive means or electric motor 44 is mounted centrally in the fan housing 32 by means `of a T-shaped motor support 46. The motor 44 drives a fan 48 about a xed vertical axis so that the gases are drawn from the interior of the building through the opening 14 and the stack 22. A diaphragm 50, ysecured within the fan housing 32 at `the level of the fan 48, serves to increase the efllciency of the fan 48.
Vertical support members 24 Each of the vertical support members 24 extend upwardly from a corner 52 of the stack 22 (see FIGURE 3) which in the specification and the claims will be termed a juncture of the adjacent ones of the vertical side walls 42. Specifically the vertical support members 24 are secured at their lower ends to the weathering skirt` Cap member 26 Referring to FIGURES 1 and 2, the cap member 26 has a generally horizontal top 54 and a plurality of downwardly sloped connected side walls 56 which terminate at substantially the same level as the external flange 40 of the stack 22. Comparing FIGURES 1 and 2, the cap member 26 is frusto-pyramidal in shape and has a square horizontal cross-section. It should be evident, however, that the cap member 26 instead could have a hexagonal, octagonal or other polygon cross-section or may even have a circular crossasection since all of these cross-sections may be described as a plurality of downwardly sloped connected side walls. Preferably the number lof downwardly sloped connected side Walls 56 of the cap member 26 is equal to the number of vertical connected side walls 42 of the stack 22.
The cap member 26 is secured to the upper ends of the vertical support members 24 preferably by means of bolts 58. Thus the cap member 26 may be readily removed when the motor 44 of the fan 48 requires servicing.
Gas passageways 27 Referring to FIGURES 1 and 3, each gas passageway 27 is disposed between one adjacent pair `of the vertical support members 24 and above the external flange 40 and below the cap member 26. Actually, the peripheral edge of each gas passageway 27 comprises the adjacent pair of vertical support members 24, that portion of the external flange 40 and that portion of the inner surface of the cap member 24 which extend between the adjacent pair of vertical support members 24. In the illustrated ventilator there are four gas passageways 27.
Dampers 28 Referring to FIGURES 1 and 4, the dampers 28 are provided to seal the gas passageways 27 when the fan 48 is not operating. The dampers 28 are positioned externally of the gas passageway 27 and are freely pivoted along their upper edge 60 to the adjacent pair of vertical support members 24 by means of a rod 62 extending through an ear 64 secured to each of the support members 24.
The dampers 28 preferably are fabricated from lightweight, relatively thin gauge aluminum and hence include an outwardly extending flashing member 66 which serves to stillen the damper 28. The outwardly extending flashing member 66 also serves the second function of sealing the lower portion of the gas passageway 27 by engaging the external flange 40 of the stack 22 as shown in FIGURE 4. The position, indicated by the letter A in FIGURE 4, is the normally closed position of the damper 28 when the fan 48 is not operating.
When the fan 48 is operating, the damper 28, being lightweight, is forced outwardly to ride on the gas stream issuing from the gas passageway 27, in the position indicated by the letter B in FIGURE l.
Magnet means 29 Still referring to FIGURES l and 4, the dampers 28 have magnet means 29 secured thereto which are adapted to be attracted to portions of the ventilator structure surrounding the gas passageway 27. As specifically illustrated, each magnet means 29 is secured to the external surface of the damper 28 adjacent a side 68 thereof which overlies one of the vertical support members 24. The vertical support members 24 preferably comprise a magnetically susceptible material. The magnet means 29 preferably are positioned at the lower edge of the damper 28 adjacent to the flashing member 66 as shown in FIGURE 4.
The magnet means 29 should be of suflicient strength to maintain the damper 28 in sealing relation with the gas passageway 27 only when the fan 48 is not operating. When the fan is operating, sufficient gas pressure is built up within the ventilator 20 to overcome the magnetic attraction of the magnet means 29. The damper 28 thus is released and floats in the general position indicated at B in FIGURE 1.
At the left hand side of FIGURE 1, the damper 28 is also illustrated in the extreme outward position indicated by the letter C. In this position, the flashing member 66 serves the third function of a spacer, i.e., it maintains the damper 28 spaced from the side wall 56 of the cap member 26. Thus the magnet means 29 cannot magnetically engage the side wall 56 to hold the damper 28 in an open position.
From the foregoing detailed description it should be evident that the present invention provides a forced flow ventilator having freely pivotal dampers which seal the gas passageways when the fan is not operating; which pivot outwardly under the influence of the gas discharged from the stack; and which have magnet means secured thereon whose strength is sufficient to hold the dampers in sealing relation with the gas passageways only when the fan is not operating. The present invention further provides a forced flow ventilator which is relatively inexpensive to manufacture and install; and wherein only the cap member need be removed when the fan and drive means require servicing.
We claim:
1. A ventilator comprising in combination:
a ventilator stack adapted to surround a curb of a ventilator opening in a roof of a building, said stack being defined by a plurality of connected vertical flat side walls, said stack terminating in an external flange at the upper edge thereof;
a fan mounted within the said stack for rotation about a fixed vertical axis;
drive means for rotating the said fan;
a vertical support member extending upwardly from each juncture of adjacent ones of said vertical side walls;
means for securing said support member to said adjacent ones of said vertical side walls;
a cap member secured to the upper ends of said vertical support members and having a plurality of downwardly sloped connected side walls terminating at substantially the same level as said external flange and spaced therefrom;
a gas passageway between at least one adjacent pair of said vertical support members and above the said external flange and below the said cap member;
a damper disposed externally of the said gas passageway, said damper being substantially the same size as said gas passageway;
hinge means mounted at the junction of said vertical support members and said cap member beneath the said downwardly sloped connecting side walls, said hinge means pivotally securing said damper at its upper edge; and
an outwardly extending flashing member along the bottom edge of said damper, said flashing member being engaged with a portion of said external flange when the said fan is not operating.
2.` The ventilator of claim 1 wherein the said ventilatorV stack has a square cross-section.
3. The ventilator of claim 1 wherein the said cap member has a frusto-pyramidal shape.
4. The ventilator of claim 1 including:
magnet means secured to the external surface of the said damper and adapted to be attracted to portions of the structure surrounding the said gas passage- Way;
said damper comprising a non-magnetic material;
said magnet means being so positioned and being of suicient strength to hold the said damper in sealing relation with the said gas passageway only when the said fan is not operating.
5. The ventilator of claim 1 including:
magnet means secured along those sides of said damper which overlie the said adjacent pair of said vertical support members;
said damper comprising a non-magnetic material; and
the said adjacent pair of vertical support members comprising magnetic susceptible material;
said magnet means being so positioned and being of suicient strength to hold the said damper in sealing relation with the said gas passageway only when the said fan is not operating. 6. The ventilator of claim 1 wherein the said hinge means are mounted to the upper ends of the said vertical 5 support members.
References Cited by the Examiner UNITED STATES PATENTS EDWARD I. MICHAEL, Primary Examiner.
ROBERT A. OLEARY, Examiner.

Claims (1)

1. A VENTILATOR COMRPRISING IN COMBINATION: A VENTILATOR STACK ADAPTED TO SURROUND A CURB OF A VENTILATOR OPENING IN A ROOF OF A BUILDING, SAID STACK BEING DEFINED BY A PLURALITY OF CONNECTED VERTICAL FLAT SIDE WALLS, SAID STACK TERMINATING IN AN EXTERNAL FLANGE AT THE UPPER EDGE THEREOF; A FAN MOUNTED WITHIN THE SAID STACK FOR ROTATION ABOUT A FIXED VERTICAL AXIS, DRIVE MEANS FOR ROTATING THE SAID FAN; A VERTICAL SUPPORT MEMBER EXTENDING UPWARDLY FROM EACH JUNCTURE OF ADJACENT ONES OF SAID VERTICAL SIDE WALLS; MEANS FOR SECURING SAID SUPPORT MEMBER TO SAID ADJACENT ONES OF SAID VERTICAL SIDE WALLS; A CAP MEMBER SECURED TO THE UPPER ENDS OF SAID VERTICAL SUPPORT MEMBERS AND HAVING A PLURALITY OF DOWNWARDLY SLOPED CONNECTED SIDE WALLS TERMINATING AT SUBSTANTIALLY THE SME LEVEL AS SAID EXTERNAL FLANGE AND SPACED THEREFROM; A GAS PASSAGEWAY BETWEEN AT LEAST ONE ADJACENT PAIR OF SAID VERTICAL SUPPORT MEMBERS AND ABOVE THE SAID EXTERNAL FLANGE AND BELOW THE SAID CAP MEMBER; A DAMPER DISPOSED EXTERNALLY OF TE SAID GAS PASSAGEWAY, SAID DAMPER BEING SUBSTANTIALLY THE SAME SIZE AS SAID GAS PASSAGEWAY; HINGE MEANS MOUNTED AT THE JUNCTION OF SAID VERTICAL SUPPORT MEMBERS AND SAID CAP MEMBER BENEATH THE SAID DOWNWARDLY SLOPED CONNECTING SIDE WALLS, SAID HINGE MEANS PIVOTALLY SECURING SAID DAMPER AT ITS UPPER EDGE; AND AN OUTWARDLY EXTENDING FLASHING MEMBER ALONG THE BOTTOM EDGE OF SAID DAMPER, SAID FLASHING MEMBER BEING ENGAGED WITH A PORTION OF SAID EXTERNAL FLANGE WHEN THE SAID FAN IS NOT OPERATING.
US204575A 1962-06-22 1962-06-22 Forced flow ventilator Expired - Lifetime US3212425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US204575A US3212425A (en) 1962-06-22 1962-06-22 Forced flow ventilator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US204575A US3212425A (en) 1962-06-22 1962-06-22 Forced flow ventilator

Publications (1)

Publication Number Publication Date
US3212425A true US3212425A (en) 1965-10-19

Family

ID=22758489

Family Applications (1)

Application Number Title Priority Date Filing Date
US204575A Expired - Lifetime US3212425A (en) 1962-06-22 1962-06-22 Forced flow ventilator

Country Status (1)

Country Link
US (1) US3212425A (en)

Cited By (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315587A (en) * 1965-06-28 1967-04-25 John J Horan Window-mounted ventilating apparatus
US3330379A (en) * 1964-11-12 1967-07-11 Loren Cook Company Device for attenuating sound waves and the combination thereof with a curb and ventilator
US3396652A (en) * 1966-06-15 1968-08-13 Jenn Air Corp Ventilating skylight with heat vent
US3433145A (en) * 1966-03-04 1969-03-18 Colchester Woods Impellers,especially for ventilators
US3472150A (en) * 1967-10-19 1969-10-14 Strawsine Mfg Co Self-closing flexible damper
US4036120A (en) * 1975-11-14 1977-07-19 Colt International Limited Ventilators
US4510851A (en) * 1981-11-24 1985-04-16 Broan Mfg. Co., Inc. Ventilation fan
US4596180A (en) * 1981-03-26 1986-06-24 Emerson Electric Co. Whole house fan
US4784049A (en) * 1981-03-26 1988-11-15 Emerson Electric Co. Whole house fan
US6802770B2 (en) 1999-12-18 2004-10-12 Broan-Nutone Llc Ventilating exhaust fan
US20050111840A1 (en) * 2003-11-21 2005-05-26 Craw Gary J. Ventilating and heating apparatus and method
US20050111972A1 (en) * 2003-11-21 2005-05-26 Broan-Nutone Llc Modular ventilating exhaust fan assembly and method
US20050218289A1 (en) * 2004-04-02 2005-10-06 Penlesky Robert G Fan mounting spacer assembly and method
US20090130970A1 (en) * 2007-11-21 2009-05-21 Corey Scott Jacak Exhaust fan and method of operating the same
USD618782S1 (en) 2009-12-22 2010-06-29 Broan-Nutone, Llc Grille
USD635238S1 (en) 2009-07-14 2011-03-29 Broan-Nutone Llc Ventilation grille
US8616842B2 (en) 2009-03-30 2013-12-31 Airius Ip Holdings, Llc Columnar air moving devices, systems and method
US20150027066A1 (en) * 2013-07-29 2015-01-29 Cox Engineering Company Curb adapter
US20150192219A1 (en) * 2014-01-09 2015-07-09 International Business Machines Corporation Air valve for electronics enclosures
US9151295B2 (en) 2008-05-30 2015-10-06 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD745652S1 (en) 2014-01-28 2015-12-15 Homewerks Worldwide, LLC Fan grille
USD752199S1 (en) 2014-09-22 2016-03-22 Homewerks Worldwide, LLC Bath fan with speaker
USD752202S1 (en) 2013-08-08 2016-03-22 Homewerks Worldwide, LLC Fan grille
US9335061B2 (en) 2008-05-30 2016-05-10 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9344787B2 (en) 2012-12-22 2016-05-17 Homewerks Worldwide, LLC Audio equipped fan
USD759800S1 (en) 2008-01-02 2016-06-21 Broan-Nutone Llc Grille
US9398357B2 (en) 2012-12-22 2016-07-19 Homewerks Worldwide, LLC Audio equipped fan
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9609407B2 (en) 2012-12-22 2017-03-28 Homewerks Worldwide, LLC Method of manufacturing an audio equipped fan assembly
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
US9631627B2 (en) 2004-03-15 2017-04-25 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9702576B2 (en) 2013-12-19 2017-07-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD804627S1 (en) 2015-05-19 2017-12-05 Broan-Nutone Llc Vent hood
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
USD808001S1 (en) 2016-03-14 2018-01-16 Homewerks Worldwide, LLC Square fan grille
USD814009S1 (en) 2015-05-19 2018-03-27 Broan-Nutone, Llc Vent hood
USD815724S1 (en) 2015-09-14 2018-04-17 Broan-Nutone Llc Ventilation grill
USD816206S1 (en) 2015-09-14 2018-04-24 Broan-Nutone Llc Ventilation grill
USD820428S1 (en) 2013-06-20 2018-06-12 Broan-Nutone Llc Range hood
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device
USD822821S1 (en) 2015-09-14 2018-07-10 Broan-Nutone, Llc Ventilation grill
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD826391S1 (en) 2015-05-19 2018-08-21 Broan-Nutone Llc Vent hood
USD836765S1 (en) 2015-08-31 2018-12-25 Broan-Nutone Llc Vent hood
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
USD850601S1 (en) 2014-05-01 2019-06-04 Broan-Nutone Llc Grill element
USD858734S1 (en) 2015-05-19 2019-09-03 Broan-Nutone Llc Vent hood
USD861639S1 (en) 2015-10-06 2019-10-01 Broan-Nutone Llc Wireless speaker
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
USD881375S1 (en) 2018-05-22 2020-04-14 Broan-Nutone Llc Grille assembly for a bathroom ventilation fan
USD883467S1 (en) 2015-09-14 2020-05-05 Broan-Nutone Llc Ventilation grill
USD884869S1 (en) 2015-09-14 2020-05-19 Broan-Nutone Llc Ventilation grill
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
US20200173674A1 (en) * 2014-03-06 2020-06-04 Gregory S. Daniels Roof vent with an integrated fan
USD886983S1 (en) 2015-09-14 2020-06-09 Broan-Nutone Llc Ventilation grill
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
USD897521S1 (en) 2016-10-14 2020-09-29 Broan-Nutone Llc Vent hood
USD898896S1 (en) 2019-01-22 2020-10-13 Broan-Nutone Llc Ventilation grille
USD899582S1 (en) 2019-01-22 2020-10-20 Broan-Nutone Llc Ventilation grille
USD902372S1 (en) 2018-11-28 2020-11-17 Broan-Nutone Llc Ventilation grille
USD904594S1 (en) 2015-09-14 2020-12-08 Broan-Nutone Llc Ventilation grill
USD908200S1 (en) 2015-09-14 2021-01-19 Broan-Nutone Llc Ventilation grill
USD908861S1 (en) 2018-11-28 2021-01-26 Broan-Nutone Llc Ventilation grille
USD909560S1 (en) 2018-11-28 2021-02-02 Broan-Nutone Llc Ventilation grille
USD932611S1 (en) 2019-06-24 2021-10-05 Homewerks Worldwide, LLC Fan grille
USD932612S1 (en) 2019-11-26 2021-10-05 Homewerks Worldwide, LLC Fan grille
USD933194S1 (en) 2019-06-24 2021-10-12 Homewerks Worldwide, LLC Fan grille
USD933195S1 (en) 2019-11-26 2021-10-12 Homewerks Worldwide, LLC Fan grille
USD933809S1 (en) 2019-11-26 2021-10-19 Homewerks Worldwide, LLC Fan grille
USD943730S1 (en) 2018-11-28 2022-02-15 Broan-Nutone Llc Ventilation grille
USD946137S1 (en) 2019-05-01 2022-03-15 Broan-Nutone Llc Ventilation grille
USD946136S1 (en) 2018-11-28 2022-03-15 Broan-Nutone Llc Ventilation grille
USD948025S1 (en) 2019-11-26 2022-04-05 Homewerks Worldwide, LLC Fan grille
US11300305B2 (en) 2019-02-15 2022-04-12 Broan-Nutone Llc Grille attachment feature for a ventilation system
US11326792B2 (en) 2019-02-15 2022-05-10 Broan-Nutone Llc Grille attachment system for a ventilation system
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332552A (en) * 1943-03-24 1943-10-26 John T Belanger Roof fan ventilator
US2711682A (en) * 1951-08-04 1955-06-28 Ilg Electric Ventilating Co Power roof ventilator
US2739521A (en) * 1952-06-14 1956-03-27 Nu Tone Inc Magnetic damper holder
US2812703A (en) * 1954-02-04 1957-11-12 Uno Ventilator Company Roof ventilator
US2898841A (en) * 1954-02-01 1959-08-11 Knutson Harold Air scupper
US2981172A (en) * 1959-01-22 1961-04-25 John S Kalman Updraft ventilator and magnetic damper catch therefor
US3064543A (en) * 1960-05-23 1962-11-20 Peters Leo Container manipulating apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332552A (en) * 1943-03-24 1943-10-26 John T Belanger Roof fan ventilator
US2711682A (en) * 1951-08-04 1955-06-28 Ilg Electric Ventilating Co Power roof ventilator
US2739521A (en) * 1952-06-14 1956-03-27 Nu Tone Inc Magnetic damper holder
US2898841A (en) * 1954-02-01 1959-08-11 Knutson Harold Air scupper
US2812703A (en) * 1954-02-04 1957-11-12 Uno Ventilator Company Roof ventilator
US2981172A (en) * 1959-01-22 1961-04-25 John S Kalman Updraft ventilator and magnetic damper catch therefor
US3064543A (en) * 1960-05-23 1962-11-20 Peters Leo Container manipulating apparatus

Cited By (110)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3330379A (en) * 1964-11-12 1967-07-11 Loren Cook Company Device for attenuating sound waves and the combination thereof with a curb and ventilator
US3315587A (en) * 1965-06-28 1967-04-25 John J Horan Window-mounted ventilating apparatus
US3433145A (en) * 1966-03-04 1969-03-18 Colchester Woods Impellers,especially for ventilators
US3396652A (en) * 1966-06-15 1968-08-13 Jenn Air Corp Ventilating skylight with heat vent
US3472150A (en) * 1967-10-19 1969-10-14 Strawsine Mfg Co Self-closing flexible damper
US4036120A (en) * 1975-11-14 1977-07-19 Colt International Limited Ventilators
US4596180A (en) * 1981-03-26 1986-06-24 Emerson Electric Co. Whole house fan
US4784049A (en) * 1981-03-26 1988-11-15 Emerson Electric Co. Whole house fan
US4510851A (en) * 1981-11-24 1985-04-16 Broan Mfg. Co., Inc. Ventilation fan
US6802770B2 (en) 1999-12-18 2004-10-12 Broan-Nutone Llc Ventilating exhaust fan
US20060073008A1 (en) * 2003-11-21 2006-04-06 Broan-Nutone Llc Modular ventilating exhaust fan assembly and method
US6979169B2 (en) 2003-11-21 2005-12-27 Broan-Nutone Llc Modular ventilating exhaust fan assembly and method
US20050111972A1 (en) * 2003-11-21 2005-05-26 Broan-Nutone Llc Modular ventilating exhaust fan assembly and method
US7203416B2 (en) 2003-11-21 2007-04-10 Broan-Nutone Llc Ventilating and heating apparatus with heater shielded by tapered discharge duct
US7455500B2 (en) 2003-11-21 2008-11-25 Broan-Nu Tone Llc Modular ventilating exhaust fan assembly and method
US20050111840A1 (en) * 2003-11-21 2005-05-26 Craw Gary J. Ventilating and heating apparatus and method
US11053948B2 (en) 2004-03-15 2021-07-06 Airius Ip Holdings, Llc Temperature destratification systems
US9631627B2 (en) 2004-03-15 2017-04-25 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9714663B1 (en) 2004-03-15 2017-07-25 Airius Ip Holdings, Llc Temperature destratification systems
US11703062B2 (en) 2004-03-15 2023-07-18 Airius Ip Holdings, Llc Temperature destratification systems
US11365743B2 (en) 2004-03-15 2022-06-21 Airius Ip Holdings, Llc Temperature destratification systems
US10487840B2 (en) 2004-03-15 2019-11-26 Airius Ip Holdings, Llc Temperature destratification systems
US7128303B2 (en) 2004-04-02 2006-10-31 Broan-Nu Tone Llc Fan mounting spacer assembly
US20070040091A1 (en) * 2004-04-02 2007-02-22 Broan-Nutone Llc. Fan mounting spacer assembly and method
US20050218289A1 (en) * 2004-04-02 2005-10-06 Penlesky Robert G Fan mounting spacer assembly and method
US20090130970A1 (en) * 2007-11-21 2009-05-21 Corey Scott Jacak Exhaust fan and method of operating the same
USD837966S1 (en) 2008-01-02 2019-01-08 Broan-Nutone Llc Grille
USD759800S1 (en) 2008-01-02 2016-06-21 Broan-Nutone Llc Grille
US9335061B2 (en) 2008-05-30 2016-05-10 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9970457B2 (en) 2008-05-30 2018-05-15 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9151295B2 (en) 2008-05-30 2015-10-06 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US8616842B2 (en) 2009-03-30 2013-12-31 Airius Ip Holdings, Llc Columnar air moving devices, systems and method
USD635238S1 (en) 2009-07-14 2011-03-29 Broan-Nutone Llc Ventilation grille
USD618782S1 (en) 2009-12-22 2010-06-29 Broan-Nutone, Llc Grille
US10184489B2 (en) 2011-06-15 2019-01-22 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
USD926963S1 (en) 2012-05-15 2021-08-03 Airius Ip Holdings, Llc Air moving device
US9609407B2 (en) 2012-12-22 2017-03-28 Homewerks Worldwide, LLC Method of manufacturing an audio equipped fan assembly
US9398357B2 (en) 2012-12-22 2016-07-19 Homewerks Worldwide, LLC Audio equipped fan
US9344787B2 (en) 2012-12-22 2016-05-17 Homewerks Worldwide, LLC Audio equipped fan
USD820428S1 (en) 2013-06-20 2018-06-12 Broan-Nutone Llc Range hood
US20150027066A1 (en) * 2013-07-29 2015-01-29 Cox Engineering Company Curb adapter
US9134040B2 (en) * 2013-07-29 2015-09-15 Cox Engineering Company Curb adapter
US9625175B2 (en) 2013-07-29 2017-04-18 Cox Engineering Company Curb adapter
USD752202S1 (en) 2013-08-08 2016-03-22 Homewerks Worldwide, LLC Fan grille
US10655841B2 (en) 2013-12-19 2020-05-19 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11092330B2 (en) 2013-12-19 2021-08-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10641506B2 (en) 2013-12-19 2020-05-05 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9702576B2 (en) 2013-12-19 2017-07-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11221153B2 (en) 2013-12-19 2022-01-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US20150192219A1 (en) * 2014-01-09 2015-07-09 International Business Machines Corporation Air valve for electronics enclosures
US9482349B2 (en) * 2014-01-09 2016-11-01 International Business Machines Corporation Air valve for electronics enclosures
US20160018008A1 (en) * 2014-01-09 2016-01-21 International Business Machines Corporation Air valve for electronics enclosures
US9523432B2 (en) * 2014-01-09 2016-12-20 International Business Machines Corporation Air valve for electronics enclosures
USD745652S1 (en) 2014-01-28 2015-12-15 Homewerks Worldwide, LLC Fan grille
US20200173674A1 (en) * 2014-03-06 2020-06-04 Gregory S. Daniels Roof vent with an integrated fan
US11788743B2 (en) * 2014-03-06 2023-10-17 O'daniels, Llc. Roof vent with an integrated fan
USD850601S1 (en) 2014-05-01 2019-06-04 Broan-Nutone Llc Grill element
US11236766B2 (en) 2014-06-06 2022-02-01 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US11713773B2 (en) 2014-06-06 2023-08-01 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US10724542B2 (en) 2014-06-06 2020-07-28 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD752199S1 (en) 2014-09-22 2016-03-22 Homewerks Worldwide, LLC Bath fan with speaker
USD826391S1 (en) 2015-05-19 2018-08-21 Broan-Nutone Llc Vent hood
USD804627S1 (en) 2015-05-19 2017-12-05 Broan-Nutone Llc Vent hood
USD814009S1 (en) 2015-05-19 2018-03-27 Broan-Nutone, Llc Vent hood
USD858734S1 (en) 2015-05-19 2019-09-03 Broan-Nutone Llc Vent hood
USD836765S1 (en) 2015-08-31 2018-12-25 Broan-Nutone Llc Vent hood
USD815724S1 (en) 2015-09-14 2018-04-17 Broan-Nutone Llc Ventilation grill
USD816206S1 (en) 2015-09-14 2018-04-24 Broan-Nutone Llc Ventilation grill
USD886983S1 (en) 2015-09-14 2020-06-09 Broan-Nutone Llc Ventilation grill
USD822821S1 (en) 2015-09-14 2018-07-10 Broan-Nutone, Llc Ventilation grill
USD908200S1 (en) 2015-09-14 2021-01-19 Broan-Nutone Llc Ventilation grill
USD904594S1 (en) 2015-09-14 2020-12-08 Broan-Nutone Llc Ventilation grill
USD884869S1 (en) 2015-09-14 2020-05-19 Broan-Nutone Llc Ventilation grill
USD883467S1 (en) 2015-09-14 2020-05-05 Broan-Nutone Llc Ventilation grill
USD861639S1 (en) 2015-10-06 2019-10-01 Broan-Nutone Llc Wireless speaker
USD808001S1 (en) 2016-03-14 2018-01-16 Homewerks Worldwide, LLC Square fan grille
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
US11105341B2 (en) 2016-06-24 2021-08-31 Airius Ip Holdings, Llc Air moving device
US11421710B2 (en) 2016-06-24 2022-08-23 Airius Ip Holdings, Llc Air moving device
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
USD897521S1 (en) 2016-10-14 2020-09-29 Broan-Nutone Llc Vent hood
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
USD881375S1 (en) 2018-05-22 2020-04-14 Broan-Nutone Llc Grille assembly for a bathroom ventilation fan
USD895783S1 (en) 2018-05-22 2020-09-08 Broan-Nutone Llc Grille assembly for a bathroom ventilation fan
USD943730S1 (en) 2018-11-28 2022-02-15 Broan-Nutone Llc Ventilation grille
USD908861S1 (en) 2018-11-28 2021-01-26 Broan-Nutone Llc Ventilation grille
USD902372S1 (en) 2018-11-28 2020-11-17 Broan-Nutone Llc Ventilation grille
USD946136S1 (en) 2018-11-28 2022-03-15 Broan-Nutone Llc Ventilation grille
USD909560S1 (en) 2018-11-28 2021-02-02 Broan-Nutone Llc Ventilation grille
USD898896S1 (en) 2019-01-22 2020-10-13 Broan-Nutone Llc Ventilation grille
USD899582S1 (en) 2019-01-22 2020-10-20 Broan-Nutone Llc Ventilation grille
US11326792B2 (en) 2019-02-15 2022-05-10 Broan-Nutone Llc Grille attachment system for a ventilation system
US11732914B2 (en) 2019-02-15 2023-08-22 Broan-Nutone Llc Grille attachment feature for a ventilation system
US11300305B2 (en) 2019-02-15 2022-04-12 Broan-Nutone Llc Grille attachment feature for a ventilation system
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake
US11781761B1 (en) 2019-04-17 2023-10-10 Airius Ip Holdings, Llc Air moving device with bypass intake
USD946137S1 (en) 2019-05-01 2022-03-15 Broan-Nutone Llc Ventilation grille
USD933194S1 (en) 2019-06-24 2021-10-12 Homewerks Worldwide, LLC Fan grille
USD932611S1 (en) 2019-06-24 2021-10-05 Homewerks Worldwide, LLC Fan grille
USD948025S1 (en) 2019-11-26 2022-04-05 Homewerks Worldwide, LLC Fan grille
USD933809S1 (en) 2019-11-26 2021-10-19 Homewerks Worldwide, LLC Fan grille
USD933195S1 (en) 2019-11-26 2021-10-12 Homewerks Worldwide, LLC Fan grille
USD932612S1 (en) 2019-11-26 2021-10-05 Homewerks Worldwide, LLC Fan grille

Similar Documents

Publication Publication Date Title
US3212425A (en) Forced flow ventilator
US3918226A (en) Thermoplastic heat responsive fire vent apparatus
JPS62112987A (en) Cooling tower
US3520093A (en) Cover for roof ventilator
US3302551A (en) Ventilator
US2913576A (en) Louver-diffuser
US2304500A (en) Chimney
CN108678616A (en) A kind of internal-open and inner tilt window construction
US2721630A (en) Building construction
US3732730A (en) Weather vane and vent assembly
JPH0741345U (en) High diffusion type outlet
US3202083A (en) One way flow ventilator damper
US3247775A (en) Composite gravity ventilator
US3975576A (en) Rotatable furnace pot including stoking means
US2903956A (en) Stack top
JPH0531215U (en) Simple dustproof room for on-site assembly of gas insulation equipment
JPS6130106Y2 (en)
JPS6119117Y2 (en)
JPS6115468Y2 (en)
JPH0248768Y2 (en)
JPH0960965A (en) Hanging device of air conditioner
CN201129523Y (en) Building air exhausting path fire-proof valve
JP2768965B2 (en) Floor inspection opening with ventilation function for underfloor pit
CN207137537U (en) A kind of purification detection means of chimney
JPS608045Y2 (en) vault ventilation system