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Publication numberUS2808937 A
Publication typeGrant
Publication dateOct 8, 1957
Filing dateNov 26, 1954
Priority dateNov 26, 1954
Publication numberUS 2808937 A, US 2808937A, US-A-2808937, US2808937 A, US2808937A
InventorsJames P O'meara
Original AssigneeW M Sprinkman Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2808937 A
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Description  (OCR text may contain errors)

Oct. 8, 1957 J. P. OMEARA 2,808,937

FILTER original Filed April les,y 1954 IN V EN TOR.

7 gwno' M BY l ZM @MLU United States arent O FILTER James P. OMeara, Milwaukee, Wis., assignor to W. M.

Sprinkman Corporation, Milwaukee, Wis., a corporation of Wisconsin Continuation of application Serial No. 423,651, April 16, application November 26, 1954, Serial No.

1 Claim. (Cl. 2111-445) The invention relates to filters and more particularly to those using replaceable filter media and especially those for filtering milk or other liquids under sanitary conditions.

Filters of the type above described must be capable of being readily cleaned and be formed so that the filter media may be easily and quickly replaced in the field, It has been found that the usual methods of clamping the filter media and a round ring gasket between the sections is not practical as capillary action of the fibres of the usual fibrous lter pad will cause leakage at the joint between the sect-ions. The object of the present in vention is to provide a new and improved form of housing and sealing gasket as hereinafter described which permits repeated renewals of the pad without danger of leakage occurring through the capillary action of the pad.

The invention further consists in the several features hereinafter set forth and more particularly defined by the cla-im at the conclusion hereof.

ln the drawings:

Fig. 1 is a vertical sectional view taken on the line 1-1 of Fig. 2;

Fig. 2 is a plan view of ,the filter, parts being broken away and parts being shown in section;

Fig. 3 is a side elevation view of the band clamp;

Fig 4 is an enlarged sectional View through the joint before clamping pressure is applied by the band;

Fig. 5 is a view similar to Fig. 4 showing the joint under clamping pressure;

Fig. 6 -is a detailed vertical sectional View taken on the line 6--6 of Fig. 3;

Fig. 7 is an enlarged vertical sectional view of the sealing ring.

Referring -to the drawings, the lter includes complementary housing sections 7 and 8, a sealing ring 9 of rubber .or other yieldable material or composition of material, a ilexible fibrous filter pad 10 of cotton, or other suitable flexible fibres or cloth made from such bres, and means for clamping the sections together with the ring 9 and peripheral portions of the pad V1t) be'- tween them.

After considerable experimenting, the peripheral edges of the housing sections have been formed to provide annular base flanges 11 which have cylindrically curved outer edge portions 12 and back portions 13 which slope or converge inwardly toward each other as shown so that the ring 9 and the outer peripheral edge portion 14 of the pad are clamped together entirely within the flanged area of the sections with the pad extending over one of the flanges. Also it has been necessary to develop a special ovate form of ring 9 which, as best shown in Fig. 7, has an inner cylindrical half portion 9a and an outer elliptical half portion 9b.

The parts may be clamped together by any suitable clamping means but are here shown as clamped together by a `one piece metal band 15 having a ilat central portion 16 and tapered sides 17 provided with laterally disposed reinforcing edge tlanges 18. The width of the 2,808,937 Patented Oct. 8, 1957 ilat portion is less than the width of the'edge to be joined so that the tapered sides of the band are capable of exerting a considerable compressive wedging action on the joint when the ends of the band 15 are drawn together. These 'tapered side portions are designed to engage the curved end portions of the band so that as the band is drawn up from the position shown in Fig.4 to the position shown in Fig. 5, the flanges 11 of the housing sectionsare moved toward each other, and the portions 12 of the flange 11 acting on the elliptical section portion 9b of the ring 9 act to flatten or distort it so that portions of thispart of the ring which are beyond the outer edge of the filter pad are forced out between the edges of the flanges to obturate the opening between said sections and kalso are forced into direct sealing contact with the curved edge of the housing section that projects beyond the pad, thus effectively sealing off the pad from the adjacent outer edges of the housing sections so that any capillary action that might occur in -the edge portion of the pad is prevented from producing a leak at the joint. The convergence of the flanges 11 back of their curved outer edges to the point where they join the sides of their sections acts to prevent the ring 9 from squeezing out between these flanges and causes the ring to be retained in the curved cavity formed by the curved edges 12 of the flanges in which the maximum clamping pressure is produced.

A Any suitable means may be used for drawing the ends of thebands 15 together, and inthe drawings I have shown a metal loop 2li welded or brazed to one end of the band and having a stirrup fitting 21 pivotally connected thereto at one end and provided with a slot 22 and a finger projection 23. A metal loop 24 welded or brazed to the other end of the band receives the pin ends 25 of a bolt socket 26. An F head bolt 27 is adapted to interlock with the slotted end of the stirrup fitting 21 and has its shank mounted to slide in the socket 26. The end of the bolt 27 is threaded for engagement with a threaded socket or nut 28 having pin projections 29 for turning it so as to draw up on the bolt 27 and thus bring the ends of the band 15 toward each other to produce the desired clamping tension of the Wedge sided band on the flanged edges of the housing sections, the ring 9, and the peripheral portion of the pad.

Each housing section has a centrally located opening 30 which at its outer end 31 is formed as a boss or threaded fitting to receive the nut of a union coupling connecting the filter in the filtering circuit. Either one of these fittings may be an inlet or outlet for the liquidV to be filtered. Instead of the plain openings Sil, these openings may be provided with inwardly extending tube portions as more particularly shown, described, and claimed in my copending application Serial No. 326,086, filed December 18, 1952, now Patent Number 2,727,634, for Filter, if desired.

This application is a continuation of my prior application Serial No. 423,651, filed April 16, 1954, now abandoned for Filter, as to common claimahle subject matter.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claim.

What I claim as my invention is:

In a filter of the type described, the combination of a flexible fibrous self-sustaining filter pad, a sealing ring of yieldable material having an inner half of cylindrical cross section and an outer half of elliptical and greater cross section, a pair of complementary housing sections having outwardly extending base flanges with curved outer edge portions to engage the `outer portions of said ring, said flanges adapted to receive and position said 3 rirglbelweelhem wi'vi'dlhe peripheral portions of the pad' disposed jb'etween `l:mide"fofsadrrhtrgrrd-a"part^c f the ange of one of said sections, and damping means for exerting a clampingpressure substantially .conned to 'he "curved outer 'edge poto'ns "of said anges to Squeeze' the ring to v a Lflattenedforrnoce1use'sai'drfng to" seal ithe space kbetween 'said 'anges `rrell'idngthespaee betweenthe end of the pad and'theend of "itsiassocated 'flange land-"to extrude a portion of 111e' elliptical halfof thefringrbetween theouterside edges'of sa'idanges to 10 preventlekage 'by 'capillaryn'ctonof the pad.

References VCitedin' the le 01:'V this fpatent UNITED' STATES` PTENTS :604,931 VIAEisendrath -;Myh .1898

'4 Y l Lackland Apr. 2, Mittinger "Apr."26,` Switzer Ian. 15, Kenney Mar. 4, Sykes Feb. 3, Birch v Cox Apr. 21, Hansen etl. Apr. 23, Smith -..July 23, ,l Booth Junef2l,

Russell et al. ,.Mayf 3-1,

Patent Citations
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US604931 *Oct 1, 1897May 31, 1898 Filter
US1261558 *Aug 31, 1915Apr 2, 1918Thomas C LacklandFilter.
US1376216 *May 18, 1920Apr 26, 1921 Three-piece metallic shipping-barbel
US1481160 *Jan 31, 1922Jan 15, 1924Switzer Packing CompanyHydraulic packing
US1749730 *Jun 22, 1928Mar 4, 1930Kenney Francis L MFilter device
US1790957 *Feb 9, 1926Feb 3, 1931 Seal i-ob vacuum jabs
US2011031 *Apr 25, 1934Aug 13, 1935William T BirchStrainer for automobile cooling systems
US2280480 *Apr 20, 1940Apr 21, 1942Hamett H CoxOil filter
US2399115 *May 20, 1944Apr 23, 1946Aluminum Goods Mfg CoPressure cooker
US2404409 *Oct 3, 1942Jul 23, 1946Maytag CoContainer
US2473986 *Oct 18, 1945Jun 21, 1949Wallace & Tiernan Co IncWater purification unit
US2709524 *Sep 24, 1953May 31, 1955Luber Finer IncFluid filter
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3085689 *Feb 9, 1960Apr 16, 1963Johnson & JohnsonFilter assembly
US3206031 *Mar 2, 1962Sep 14, 1965Met Pro IncLiquid dispenser for the purification and filtration of water
US3931015 *Dec 4, 1974Jan 6, 1976C. B. Kaupp & Sons, Inc.Filter vessel and filter element assembly
US4126559 *Aug 10, 1977Nov 21, 1978Pall CorporationPharmaceutical filter
US4367081 *Jan 16, 1981Jan 4, 1983Beckman Instruments, Inc.Particulate filter assembly
US4446017 *Jun 10, 1982May 1, 1984Oberg Gordon DOil filter assembly having a removable filter member
US4450081 *Jul 16, 1981May 22, 1984Sealed Power CorporationTransmission fluid filter and method of manufacture
US5147545 *Apr 16, 1990Sep 15, 1992Eastman Kodak CompanyMated disk filter housing
US5667566 *Mar 12, 1996Sep 16, 1997Reading Technologies, Inc.Apparatus for water vapor removal from a compressed gas
US6592758 *May 8, 2002Jul 15, 2003Delaware Capital Formation, Inc.Filter element for a liquid-state process stream
US6595372 *Jul 16, 1999Jul 22, 2003Honda Giken Kogyo Kabushiki KaishaFilter device
US8409311 *Sep 5, 2007Apr 2, 2013Mann+Hummel GmbhFiltering device
US20110042280 *Aug 19, 2009Feb 24, 2011Access Business Group International LlcBag Path Fluid Filter Assembly
DE1217799B *May 9, 1962May 26, 1966Ford Motor CoAnordnung des Druckfluessigkeitskreislaufes fuer ein Kraftfahrzeuggetriebe
DE1576348A1 *May 9, 1967Mar 26, 1970Bosch Gmbh RobertBrennstoffilter fuer Brennkraftmaschinen
DE2710894A1 *Mar 12, 1977Oct 13, 1977Pall CorpFiltervorrichtung
DE19821279A1 *May 13, 1998Nov 18, 1999Giselher KloseFilter for effluent water bearing flocculated load discharged from chemical or electrolytic process
U.S. Classification210/445
International ClassificationB01D29/01
Cooperative ClassificationB01D29/01
European ClassificationB01D29/01