US1899029A - Self-sealing filter - Google Patents

Description

Feb. 28, 1933. c. H. GAGEN 1,899,029

SELF SEALING FILTER Original Filed June 20, 1928 Fig. 2

72 III Charles 11.. Ha en INVENTOI? BYMwuaiW ATTORNE Y Patented Feb. 28, 1933 UNITED STATES PATENT OFFIQE CHARLES H. GAGEN, OF MONTCLAIB, NEW JERSEY, ASSIGNOR TO AMERICAN AIR FILTER COMPANY, INC., F LOUISVILLE, KENTUCKY, A. CORPORATION OF DELAWARE SELF-SEALING FILTER Original application filed June 20, 1928,

This invention relates to self-sealing filter construction and is a division of my co-pending application, Serial #286,7 71, filed June 20, 1928 now Patent #1,821,211, issued Sep- 5 tember 1, 1931. This co-pending application discloses a filter constructionin which filter cells or units are mounted or adapted to be mounted on a suitable frame. The cells therein shown are of a special or double passage type being formed with passages that open at the front and rear of the cell unit for the passage of the air stream and at the top and bottom for the passage of a filter cleaning medium. Such application is directed to means for sealing the top and bottom cleaning openings when the filter is in its operative or air filtering position. It is also directed to means for preventing the passage or leakage of air between the cell unit and the frame upon which it is mounted. It is to this latter feature that the present invention is specifically directed. The principal object of the invention is to provide a cell which may be positioned on a frame simply by hooking the cell thereto, and which when positioned will by virtue of its weight tend to maintain such close engagement with the frame as to prevent the passage or leakage of air between the unit and the frame. W

An embodiment of the invention is illustrated in the accompanying drawing, wherein:

Figure 1 is a fragmentary front elevation of a suitable supporting frame, showing in dotted lines the area of the frame covered by a cell unit;

Figure 2 is a sectional view taken along line 22 of Figure 1, showing a filter cell in top plan view; and

Figure 3 is a sectional view taken along line 33 of Figure 1, with a filter cell in operative position.

In carrying out the invention a frame for the support of one or more cells. is provided which is composed of vertical and horizontal Serial No. 288,?71. Divided and this application filed October 18, 1939. Serial Ho. 489,576.. 2

members 70 and 71 arranged to form rectangular openings 72 therein. A filter cell or unit indicated generally at 73 is adapted to be placed in front of each such recess 7 2 and the air drawn through the same in the direction of the arrow 74. The cell 73 overlaps the respective frame members all around the edges of the opening 7 2 to a desired distance as indicated by the dotted lines 75 in Figure 1. Each cell has adjacent to the upper ends of its two vertical side wall members two hooks or suspending devices 76 suitably secured thereto. The hooks 7 6 are adapted to be hung into and thru appropriate recesses 77 cut in the flanges of the vertical T frame members 70. The inner or under edge 78 of the projecting portion 79 of the hook device 76 is formed with an inclined surface so that when the cell is suspended in its proper position't he plane of engagement between the hook and frame inclines downwardly away from the unit. As a result of this mode of engagement the weight of the cell 73 will tend to draw the cell tightly against the respective overlapped surfaces of the vertical and horizontal T frame members 70 and 71 and thereby seal the edges of the opening 72. With the edges sealed it is obvious that the air will be prevented from passing around the side, top and bottom walls of the cell and between the frame and cell unit as a whole and will thereby be compelled to pass into the filtering passages before escaping to the clean air side of the filter cells.

Having described my invention, I claim In a filter the combination of a frame presenting a unit receiving opening, the frame being formed with recesses at the sides of each opening, a unit adapted to be positioned with its edges on one side overlapped by vertical frame surfaces adjacent said opening, and inter-engaging means between said unit and the frame whereby when the unit is operatively positioned its weight constantly tends to maintain in close engagement the overhpping surfaces between aid unit and frnmeeoeetopreventthepemegeofnir therebetw and menus comprismg hooks eecuredto esidewlllsoftheunitlndr en glge th m 3?1'1fi e e an ere y support e umt thereon, the planes of w tween the hooks endfreme in werdly away from the unit. In testimony whereof, I hereunto nfix my signature this first de of October, 1930.

v CHA LES H. GAGEN.

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