US3110582A

US3110582A - Disposable exhaust filter

Info

Publication number: US3110582A
Application number: US150757A
Authority: US
Inventors: Simpson De Roy
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-11-07
Filing date: 1961-11-07
Publication date: 1963-11-12
Anticipated expiration: 1980-11-12

Description

Nov. 12, 1963 DE RoY slMPsoN 3,110,582

DIsPosABLE EXHAUST FILTER Filed Nov. v, 1961 Fig. 2

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United States Patent O 3,110,582 DISPOSABLE EXHAUST FILTER De Roy Simpson, 817 29th St., Oakland 8, Calif. Filed Nov. 7, 1961, Ser. No. 150,757 2. Claims. (Cl. 55-446) This invention relates to new and useful improvements in filters for use particularly but by no means necessarily, in restaurant, home and .other forced air exhaust systems.

Substantially all filters presently in use in restaurant exhaust systems are of the washable type and of rather expensive construction. These filters, although heavy and difficult to handle, must be periodically removed, washed and replaced. Accordingly, it is the primary object of the present invention to provide an exhaust, etc., filter wherein disposal after a single installation or use is economically feasible.

Another highly important object of the invention is to provide a disposable lter of the aforementioned character which may be fabricated in a novel manner from a suitable material which is inherently absorbent, fire-resistant and readily available such as, -for example, asbestos.

Still another important object of the present invention is to provide, in a manner as hereinafter set forth, a disposable, one-time use exhaust ilter of `the character described which may be of any suitable size or capacity and which, further, may be readily installed in single or multiple units as may be required.

Another object of the invention is to provide a disposable exhaust ilter of the character set forth which is adapted to be expeditiously installed in any suitable frame or holder.

Other objects of the invention are to provide a disposable filter which will be comparatively simple in construction, strong, durable and of rigid construction, compact, of light weight and which may be marketed at low cost.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accomv panying drawing forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE l is a view in front elevation of a disposable exhaust filter constructed in accordance with the present invention;

FIGURE 2 is a fragmentary view in transverse section on an enlarged scale, taken substantially on the line 2-2 of FIGURE l;

FIGURE 3 is a fragmentary view vin horizontal section on an enlarged scale, taken substantially on the line 3'-3 of FIGURE 1; and

FIGURE 4 is a diagrammatic view in transverse sec- Ition through the device, showing the iiow of air therethrough.

Referring now to the drawing in detail, it will be seen that the embodiment of the present invention which has been illustrated comprises a generally rectangular frame 5 of `suitable dimensions. Mounted vertically in -the frame 5 are series of spaced, opposed baffles 6. It will be noted that the front balles 6 are `spaced inwardly from the front of the frame 5 and that the rear baiiles 6 are flush with the rear of said frame.

The bales 6 include right angularly bent upper flaps or flanges 7 the uppermost of which are adhered to the top 8 of the frame 5 and end flanges 9 which are adhered to the end members 10 of said frame. The bafes 6 further comprise lower flanges 11 which are folded on themselves to interlock with the flanges 7 of the subjacent battles to which they are adhered. As shown to advan-VA tage in FIGURE 2 of the drawing, the bight portions of the U-shaped anges 11 abut and are adhered -to the ICC opposed lower portions of the adjacent baiiles as at 12. in a manner to provide a rigid lunitary structure.

'I'he baiiies 6 comprising the

flanges

7, 9 and 11 define plenums 13 in the frame 5. Vertically staggered longitudinally elongated openings or slots 14 in the bales 6 communicate the plenums 13 for the zigzag or tortuous flow of streams of air to be decontaminated through the device.

Itis thought that the use of the invention will be readily apparent from a consideration of the foregoing. The complete device including the frame 5 is made of a suitable absorbent, reproof or fire-resistant material which does not deteriorate when saturated with grease, cooking oils, etc. 'Ihe device is installed in the intake end portion of an exhaust duct to cleanse the air before it passes therethrough. As indicated by the arrows in FIGURE 4 of the drawing, the air lows through the unit in a multiplicity of zigzag or tortuous paths. Thus, the air is caused to impinge or wipe against the multiple surfaces of the baflles 6 which extract and absorb the grease, food particles and other foreign matter therefrom in an obvious manner. The construction and arrangement of the ldevice is such that air passing therethrough undergoes several changes in velocity as well as in direction thereby creating turbulence in the filter for causing the air to contact -the absorbent surfaces repeatedly. While the openings or slots 14 are small enough to cause decreases in the velocity of the air as it enters the successive plenums, said slots are also sufficiently large to avoid clogging by lint and other material usually found in the air. The interlocking flanges 11 of the lowermost baffles 6 are adhered to the bottom member 15 of the lframe 5. When the device becomes saturated or substantially so it is simply removed and discarded and a new or fresh unit is installed.

It is believed that the many advantages of a disposable filter constructed in accordance -with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be -understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed. For example, the material may be of a waffle design for increased eiciency. Also, in

lieu of an inherently absorbent material such as asbestos, the unit may be made of an even less expensive material having on the surfaces thereof a viscous or sticky coating.

What is claimed as new is as follows:

1. A panel-like air lter adapted to be disposed in an airstream with the medial plane of the filter extending transversely of said air stream, said filter comprising a plurality of horizontally spaced and vertically extending reaches of vertically stacked and horizontally elongated upright baffles, corresponding baies of adjacent reaches being generally horizontally aligned, each of said bales having a plurality of horizontally elongated openings 4for-med therein at points spaced longitudinally therealong, the openings in each reach of bailles being disposed adjacent one of the upper and lower edge portions thereof and the openings in adjacent reaches of bales being inversely positioned relative to the corresponding ones of said upper and lower edge portions, corresponding openings in each reach of baflies being in substantial vertical alignment and corresponding ones of Ithe openings in corresponding bafes being disposed in the same vertical plane extending transversely through said filter, the upper edges of the lower set of openings in corresponding ones of said bales being spaced below the lower edges of the upper set of openings and the corresponding baliles of the adjacent reaches of baiiles, and the vertical extent of said openings being less than the spacing between adjacent ones of said reaches.

2. The combination of claim 1 wherein said baflles terminate at their lower ends in right angulated lower anges extending longitudinally thereof, projecting outwardly therefrom a distance equal to the spacing between said reaches, and terminating in reversely bent portions at their free ends slightly vertically spaced from the corresponding right angulated anges and defining therebetween horizontally disposed channels opening rearwardly in the direction in which the right angulated flanges eX- tend outwardly ffrom said `batles, said baes terminating at their upper ends in right angulated upper lianges extending longitudinally thereof and projecting outwardly therefrom a distance equal to the space between said reaches, lthe free ends of said upper anges being seated and secured in the corresponding channels, the bent portions connecting said right angulated and reversely bent cured to the upper edge portions of the corresponding baffles.

References Cited in the tile of this patent UNITED STATES PATENTS 1,621,026 P'ukerud Mar. 15, 1927 2,214,750 Myers Sept. 17, 1940 2,720,938 Cates Oct. 18, 1955 2,926,747 Wright et al. Mar. 1, 1960 FOREIGN PATENTS 234,516 Great Britain Feb. 18, 1926 281,066 Germany Dec. 12, 1914 302,071 Great Britain Dec. 13, 1928 309,116 Germany Sept. 30, 1919

Claims

1. A PANEL-LIKE AIR FILTER ADAPTED TO BE DISPOSED IN AN AIRSTREAM WITH THE MEDIAL PLANE OF THE FILTER EXTENDING TRANSVERSELY OF SAID AIR STREAM, SAID FILTER COMPRISING A PLURALITY OF HORIZONTALLY SPACED AND VERTICALLY EXTENDING REACHES OF VERTICALLY STACKED AND HORIZONTALLY ELONGATED UPRIGHT BAFFLES, CORRSPONDING BAFFLES OF ADJACENT REACHES BEING GENERALLY HORIZONTALLY ALIGNED, EACH OF SAID BAFFLES HAVING A PLURALITY OF HORIZONTALLY ELONGATED OPENINGS FORMED THEREIN AT POINTS SPACED LONGITUDINALLY THEREALONG, THE OPENINGS IN EACH REACH OF BAFFLES BEING DISPOSED ADJACENT ONE OF THE UPPER AND LOWER EDGE PORTIONS THEREOF AND THE OPENINGS IN ADJACENT REACHES OF BAFFLES BEING INVERSELY POSITIONED RELATIVE TO THE CORRESPONDING ONES OF