Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3479947 A
Publication typeGrant
Publication dateNov 25, 1969
Filing dateJan 15, 1968
Priority dateJan 15, 1968
Publication numberUS 3479947 A, US 3479947A, US-A-3479947, US3479947 A, US3479947A
InventorsMyers Lawrence A
Original AssigneeChore Time Equipment
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ventilator unit
US 3479947 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Nov. 25, 1969 1 A. MYERS VENTILATOR UNIT Filed Jan. l5, 1968 United States Patent O 3,479,947 VENTILATOR UNIT Lawrence A. Myers, Milford, Ind., assignor to Chore- 'I'ime Equipment, Inc., Milford, 1nd., a corporation of Indiana Filed Jan. 15, 1968, Ser. No. 697,913 Int. Cl. F04d 2.5/14; F24f 13/08 US. Cl. 98-116 7 Claims ABSTRACT OF THE DISCLOSURE There is disclosed a ventilator unit for mounting in a Wall of a building such as a poultry house. The unit cornprises a frame in which a fan is mounted and a combined closure and hood member swingably connected to the frame and adapted to be opened by air pressure when the fan is energized and constructed for minimizing the entry of rain and the like.

The present invention relates to a novel ventilator unit and more specifically to a novel unit particularly suitable to be mounted in an exterior wall of a building.

While ventilator units incorporating features of the present invention may be found suitable for a variety of installations, they are especially adapted for use in poultry or livestock houses. Ventilator units heretofore suggested for poultry houses and the like have usually included a fan and some means for minimizing the possibility of the entry of rain, snow and the like, particularly when the fan is not in operation. Such means have frequently included a plurality of shutters or louvers mounted for opening when the fan is started and/or a fixed hood mounted on and projecting outwardly and downwardly from the building sufficiently substantially to cover the fan opening. Such heretofore proposed structures are usually relatively complicated and expensive. In addition, such devices as louvers or shutters decrease the efiiciency of the fan unduly and are difiicult to clean and maintain.

It is an important object of the present invention to provide a novel ventilator unit having a fan and constructed so as to effectively -preclude the entry of rain and the like without unnecessary interference with the operation of the fan and further constructed so as to facilitate easy maintenance and cleaning.

Another important object of the present invention is to provide a ventilator unit of the above described type which is of relatively economical construction.

A more specific object of the present invention is to provide a novel ventilator unit of the above described type having a fan mounted within a frame and including a closure member pivotally connected to the frame and constructed and arranged so as to open easily upon starting of the fan and so as to close effectively when the fan is stopped.

Other objects and advantages of the present invention will become apparent from the following description and the accompanying drawings wherein:

FIG. 1 is a perspective View showing a ventilator unit incorporating the features of the present invention and further showing the closure member of the unit in broken lines in an open position;

FIG. 2 is a partial sectional view taken generally along line 2-2 in FIG. l;

FIG. 3 is an enlarged fragmentary sectional View taken along line 3-3 in FIG. 1; and

FIG. 4 is an enlarged fragmentary sectional view taken along line 4 4 in FIG. 1.

Referring now more specifically to the drawings wherein like parts are designated by the same numerals throughout the various figures, a ventilator unit incorporating features of the present invention is adapted to be mounted 3,479,947 Patented Nov. 25, 1969 in an opening 12 formed in a wall 14 of a building. As previously indicated, the unit may be installed in a variety of build-ings and is particularly suitable for poultry and livestock houses.

The unit 10 comprises a frame or shell preferably of rectangular configuration having opposite pairs of sides 16-18 and 20-22. These sides may be formed from sheet metal or any other suitable material and are joined together so as to define a rectangular opening complementary to `the opening 12 in the building wall. The sides terminate in marginal flanges 24, 26, 28 and 30. These fianges are adapted to overlie an interior surface of the building and are provided with apertures 32 through which nails or other suitable fastening devices may be driven.

A fan 34 is mounted within the opening defined by the frame on suitable support members or brackets 36 secured to the interior surfaces of the frame side walls. The fan may be of known construction and includes an electric motor 38 having an output shaft 40 on which a fan blade 42 is secured. The construction is such that when the fan is energized, air is pulled from the interior of the building and blown outwardly in the direction of the arrows shown in FIG. 2. Preferably, a circular Cowling 44 is mounted within the frame around the fan blade for increasing the efficiency of the air flow.

In order to prevent inadvertent or accidental contact with the fan blades, a protective screen 46 is secured over the inner or inlet side of the frame. A similar screen or wire grid 48 is also preferably secured along the outer side of the frame and across the discharge opening defined by the cowling 44. These screens may be of known construction and preferably have a grid size which is small enough to prevent accidental engagement with the fan blade but large enough so as to facilitate cleaning. Furthermore, the wire size and grid openings of the screens are such that the screens do not form obstructions which significantly decrease the efiiciency of the fan.

In accordance with an important feature of the present invention, the ventilator unit is provided with a closure member or a hood 50 adapted to extend over the outer side of the frame and close the discharge opening when the fan is not in use. The closure member or hood has side marginal portions or flanges 52, 54, 56 and 58 which are disposed in a common plane and are adapted simultaneously to abut edges of the frame or box sides 16, 18, 20 and 22 which are also disposed in a common plane as shown best in FIG. 2. Identical but oppositely disposed side portions 60 and 62 of the hood project outwardly and are inclined slightly inwardly from junctions with the marginal or side anges 52 and 54 and merge with a broad central panel portion 64 of the hood which is formed as discussed in detail below. Preferably the hood is molded in one piece from a suitable plastic material, but it is understood that any desired fabricating means can be utilized.

Bracket members 66 and 68 are secured to the opposite ends of the top side 20 and support therebetween a hinge pin or rod 70. Complementary hinge members 72 and 74 are secured to the upper fiange or marginal portion 56 of the hood. These hinge members embrace the hinge pin or rod 70 as shown best in FIGS. 2 and 4 for pivotally or swingably supporting the hood member. The arrangement is such that the axis of the hinge pin or rod 70 is in a plane containing the marginal fianges of the hood member and preferably slightly laterally outwardly from a plane containing the inwardly facing surfaces of these marginal portions. This arrangement aids in assuring proper sealing or closing engagement of the marginal portions with the outer edges of the frame or box.

T he central panel 64 of the hood has a first or top section 76 extending laterally outwardly from the upper marginal flange 56 a substantial distance. While the section 76 may be inclined downwardly slightly, to promote the runoff of rain water and the like when the hood is closed, it preferably extends primarily laterally outwardly for mergin-g with a second generally vertical or upright section 78 at a junction which is at about the same level as the uppermost point of the fan Cowling 44 and is spaced a substantial distance, at least several inches, outwardly from the fan.

The section 78 extends downwardly and merges with another section 80 at a junction 82 located slightly above the axis of the fan blade as shown best in FIG. 2. The section 80 is inclined inwardly from the junction 82 to a point or junction 84 close to the plane of the marginal flanges of the hood and relatively close to the lowermost point of the fan cowling 44. From the junction 84, the center panel has a section 86 which extends sharply outwardly for a short distance and merges with another section 88 which extends sharply inwardly and in turn merges with the bottom marginal flange 58. The location and arrangement of major portions of the hood Substantially laterally outwardly of the plane containing the marginal fianges and the axis of the rod 70 locates the center of gravity of the hood at a point which is also spaced laterally outwardly from this plane. As a result, the hood is normally biased by gravity firmly against the edges of the frame or box for assuring proper closure of the fan opening.

When the fan is energized, the pressure provided by the air stream causes the hood to shift from the closed position shown in solid lines to the open position shown in broken lines. In this open position, it is seen upon referring to FIG. 2, that the upper sections 76 and 78 of the hood are spaced substantially laterally outwardly from the fan blade even though these sections are closest to the hinge because of the aforedescribed manner in which the sections 76 are formed. The remaining sections 82, 86 and 88 of the hood are progressively spaced even greater distances from the fan opening as result of the inclined position of the hood. The total result is that the central panel portion of the hood is spaced sufficiently outwardly from the fan so as to avoid undue interference with the air stream in a manner which might cause a substantial decrease in the efficiency of the fan. By way of comparison, it has been found that presently available automatically operable louver or shutter structures reduce the efficiency of the fan by more than twice as much as the hood structure of the present invention.

Brackets 90 and 92 are secured to the opposite sides 16 and 18 toward but spaced beneath upper margins thereof. These brackets project forwardly or outwardly from the frame or fan box and carry stop elements or flanges 94 and 96 at outer ends thereof. These flanges may be separately or integrally formed and project inwardly respectively for engaging side marginal flanges 52 and 54 of the hood and thereby positively limiting outward movement of the hood as shown in broken lines in FIGS. l, 2 and 3. In this manner, positive control is maintained over the hood so as to minimize any possibility of the hood being twisted and damaged by any wind blowing around the building. As previously indicated, the central panel portion of the hood is spaced outwardly from the fan in a manner for minimizing any adverse effect on the efficiency of the fan. At the same time, however, the gradual reverse inclination of the section 80 and the sharp inclination of the section 88 effectively increases the lifting action of the air stream against the inner side of the hood for positively and securely holding the hood against the stops 94 and 96. While the relative angle of the sections 80 and 88 may be varied within reasonable limits, one arrangement which has been found to be successful contemplates a 9 angle between the section 88 and the plane of the marginal flanges and a 60 angle between the section 88 and the marginal flanges. As previously indicated, the section 88 merges with an outwardly inclined section 86. The V-shaped rib provided by these sections enhances the strength and rigidity of the lower free marginal portion of the hood.

While a preferred embodiment of the present invention has been shown and described herein, it is obvious that many structural details may be changed without departing from the spirit and scope of the appended claims.

The invention is claimed as follows:

1. A ventilator comprising frame means defining an opening through which an air stream is to be blown outwardly when the ventilator is in operation, a closure member traversing said opening, and means between said frame means and a first margin of said closure member pivotally mounting closure member for movement between a closed position and an open position, said closure member including a section adjacent said mounting means extending substantially outwardly from said opening and an additional section extending from said first mentioned section transversely of said opening for promoting movement of said closure member to said open position under the influence of said air stream upon operation of the ventilator and for minimizing any decrease in the efiiciency of the flow of said air stream. said second section extending generally parallel to said opening to a line traversing a mid portion of the opening, said closure member including a third section extending from a junction at said line with said second section and inclined at a relatively small angle rearwardly with respect to said second section, and a fourth section adjacent a margin of said closure member opposite from said mounting means and inclined rearwardly at a relatively large angle with respect to said second section.

2. A ventilator comprising frame means defining an opening through which an air stream is to be blown outwardly when the ventilator is in operation, a closure member traversing said opening, and means between said frame means and a first margin of said closure member pivotally mounting closure member for movement between a closed position and an open position, said closure member including a section adjacent said mounting means extending substantially outwardly from said opening and an additional section extending from said first mentioned section transversely of said opening for promoting movement of said closure member to said open position under the influence of said air stream upon operation of the ventilator and for minimizing any decrease in the efficiency of the fiow of said air stream, said closure member including peripherally substantially continuous marginal portions disposed substantially in a common plane and engageable with and around the periphery of said frame means when the closure member is in said closed position, said closure member further including opposite spaced apart side portions extending laterally outwardly from adjacent opposite marginal portions, said side portions and said last mentioned marginal portions extending transversely away from said mounting means, and said closure member comprising a central panel portion extending between and joining said side portions and including said rst and second mentioned sections.

3. A ventilator, as defined in claim 2, wherein said second mentioned section is inclined reversely with respect to said first mentioned section.

4. A ventilator, as defined in claim 2, wherein said closure member includes another section adjacent a margin opposite from said mounting means and extending in a direction sharply reversed with respect to said rst mentioned section.

5. A ventilator, as defined in claim 2, which includes stop means connected with opposite sides of said frame means and disposed outwardly therefrom for engaging said opposite marginal portions of said closure member when the closure member is in said open position and for preventing the closure member from moving outwardly beyond said open position.

6. A hood for a ventilator of the type described coniprising an upper marginal portion, a lower marginal portion, opposite side marginal portions joining said upper and lower marginal portions, all of said marginal portions being dsposed substantially in a common plane, said upper marginal portion being adapted to be connected with hinge means for pivotally mounting the hood for movement from an upright closed position to an outwardly inclined open position, said hood including spaced apart opposite side portions projecting laterally outwardly from said opposite side marginal portions, and said hood including a central panel portion extending between said upper and lower marginal portions and joined to outer edges of said opposite side portions, said central panel portion including a first section extending laterally outwardly from said upper marginal portion and an additional section extending reversely of said iirst section and toward said lower marginal portion.

7. A hood, as dened in claim 6, wherein said additional section of said central panel portion extends from a line generally centrally positioned between said upper and lower marginal portions and at a relatively small angle with respect to the plane of said marginal portions, said central panel portion including another section adjacent said lower marginal portion and extending reversely with respect to said first section and at a relatively large angle with respect to said plane.

References Cited UNITED STATES PATENTS 2,804,008 8/1957 Koch 98-43 2,580,797 1/1952 Koch 98-116 2,571,374 10/1951 Mayr 98-116 2,159,498 5/1939 Birkolz 98-116 2,225,349 12/ 1940 Morse 98-116 2,933,241 4/1960 Braskamp 230-259 2,950,859 8/1960 Kirk 230-259 FOREIGN PATENTS 709,785 8/ 1941 Germany. 1,061,261 11/1953 France. 1,162,268 4/1958 France.

HENRY F. RADUAZO, Primary Examiner U.S. C1. XR.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2159498 *Apr 5, 1937May 23, 1939Midwest Mfg CompanyVentilating apparatus
US2225349 *Feb 1, 1939Dec 17, 1940Gen ElectricVentilating fan control
US2571374 *Jun 21, 1948Oct 16, 1951Theresa MayrVentilating fan
US2580797 *Jun 5, 1948Jan 1, 1952Westinghouse Electric CorpWall box fan
US2804008 *Jan 19, 1954Aug 27, 1957Koch Gustav HFan apparatus
US2933241 *Nov 4, 1957Apr 19, 1960Braskamp W H NvWindow or ring ventilator
US2950859 *Dec 3, 1956Aug 30, 1960Meier Electric And Machine ComFan housing and protective grill
DE709785C *Oct 5, 1939Aug 27, 1941Johann OrlowskiVorrichtung zur selbsttaetigen zeitlichen Steuerung der Luftzufuhr fuer Kesselfeuerungen
FR1061261A * Title not available
FR1162268A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3826105 *Apr 19, 1973Jul 30, 1974IttVentilation damper for air conditioning apparatus
US3865021 *May 2, 1973Feb 11, 1975Danfoss AsAir injecting apparatus for air conditioners or the like
US4002110 *May 6, 1975Jan 11, 1977Institutal Pentru Creatie Stintifica Si TehnicaAutomatic obturator for a gasodynamic ventilation device
US4006672 *Dec 4, 1975Feb 8, 1977Matsushita Seiko Co., Ltd.Ventilation fan (ventilation system)
US4016809 *Jul 16, 1975Apr 12, 1977Contamination Control Laboratories, Inc.Clean air workbench
US4062274 *Jun 7, 1976Dec 13, 1977Knab James VExhaust system for bone cement
US4131060 *May 6, 1977Dec 26, 1978The Crest CompanySelf-closing exhaust fan cover
US4292954 *May 25, 1979Oct 6, 1981Martin Industries, Inc.Wood burning heater
US4371386 *May 18, 1981Feb 1, 1983Veco International, Inc.Filter housing
US4438680 *Jul 6, 1981Mar 27, 1984Four Seasons Solar Products CorporationGreenhouse construction provided with special ridge for ventilation
US4607567 *Dec 27, 1983Aug 26, 1986Four Seasons Solar Products CorporationGreenhouse construction provided with special ridge for ventilation
US4616560 *Apr 2, 1985Oct 14, 1986Four Seasons Solar Products Corp.Greenhouse construction provided with special ridge for ventilation
US4628702 *Aug 22, 1985Dec 16, 1986The Coleman Company, Inc.Exhaust apparatus for recreational vehicle air conditioner
US4633769 *Oct 15, 1985Jan 6, 1987Milks Stephen ARoof vent fan assembly
US4807444 *Oct 5, 1987Feb 28, 1989Mitsubishi Denki Kabushiki KaishaAir flow control device
US4815530 *Mar 10, 1987Mar 28, 1989Kool Kap Corp.Kool kap
US5567114 *Apr 26, 1995Oct 22, 1996F F Seeley Nominees Pty LtdFan closure flap
US5921862 *Jan 30, 1998Jul 13, 1999Consol, Inc.Air flow reversal prevention door assembly
US5941193 *Nov 3, 1997Aug 24, 1999Ctb, Inc.Adjustable poultry feeder assembly
US6167575 *Sep 17, 1999Jan 2, 2001James Norman SmithBathroom ventilator inlet
US6173676Jan 20, 1998Jan 16, 2001Ctb, Inc.Adjustable poultry feeder assembly
US6468054 *Oct 28, 1999Oct 22, 2002Christopher L. AnthonyCrawl space ventilator fan
US6474936 *Apr 13, 2001Nov 5, 2002Hewlett-Packard CompanyBlower impeller apparatus with one way valves
US6547519Apr 13, 2001Apr 15, 2003Hewlett Packard Development Company, L.P.Blower impeller apparatus with pivotable blades
US8128465 *Jun 27, 2008Mar 6, 2012Airdri LimitedAir displacing device
US8919142 *Mar 29, 2011Dec 30, 2014Daniel J. TippmannSwing seal for a rack-aisle freezing and chilling system
US20050081466 *Oct 17, 2003Apr 21, 2005Dovell David K.Foundation ventilation system and method
US20090004962 *Jun 27, 2008Jan 1, 2009Airdri LimitedAir displacing device
US20100267329 *Apr 16, 2009Oct 21, 2010Chung Ta ChihReturn air blocking device for fan-based heat dissipation mechanism
US20130263614 *Mar 29, 2011Oct 10, 2013Daniel J. TippmannSwing seal for a rack-aisle freezing and chilling system
US20140242902 *Feb 27, 2013Aug 28, 2014Petra Engineering Industries Co.Gravity shutter
US20150044042 *Aug 30, 2013Feb 12, 2015Hon Hai Precision Industry Co., Ltd.Fan assembly
Classifications
U.S. Classification454/344, 415/146, 454/350, 454/353, 415/26, 454/355
International ClassificationF24F7/013
Cooperative ClassificationF24F7/013
European ClassificationF24F7/013