US1872229A - Oil filter - Google Patents

Description

Aug. 16, 1932. 1 BLACKMORE OIL FILTER Filed April 25, 1928 Patented Aug. 16, 1932 .UNITED STATES PATENT' Ormea LLOYD BLAGRMORE, or DETROIT, MICHIGAN, AssIGNOR 'ro GNRAL MOTORS oonlrORA'rION, or DETROIT, MICHIGAN, A CORPORATION OR DELAWARE OIL FILTER Application led April 2.8; 1928. Serial No. 272,200.

Thisinvention relatesto filters and has particular reference to a filter for removing impurities from oil'in the lubricating system applied to engines of automotive vehicles.

In prior filters it has been customary to forcethe oil through a fabric, the impurities being caught in the meshes. f The fabric has' been either in the form of a spiral having a plurality of channels or the cloth being mounted on parallel series of screens or perforated plates and the oil forced transversely through the fabric.

The present invention ditfer'sfrom prior constructions in that it forces the oil to ass under pressure along the length of the fa ric which is resiliently held against a container. By forcing the oil along the fabric a purify ing or scrubbing action takes place in which the impurities are caught in the nap of the cloth. The oil passes over and/or across or 'along the length of the fabric and out at the fabric and container from the inlet or one end of the fabric to the outlet or the other end.

use a foraminous member in the form of a;

wire gauze having the wires which run parallel to the path of the oil, of a gage which is somewhat heavier than the -gage of the wires which run at an angle'to the Apath of travel of the lubricant. The function of this; difference in the gage of the wires is' ito give a greater degree of stiffness tothe support so that it will take a greater amount -of pressure in the lubricating system to cause it to give.

One end ofthe support vis preferably attached to the end .of a plate which is rigidly secured to thecontainer inside thereof. This plate is applied at the inlet and is spaced from the container to allow foran open portion or recess which will readily admit of the liquid to be filtered. The oppositeend of the supporting screenis free, and overlaps and is adapted to slide on the plate. As the oil,

mitted to go therethrough. If the oil shouldn seep through the cloth no harm will be done, but in practice it is the obj ect of the invention to forcethe oil along the length of the cloth so that' the impurities therein will be taken up by the meshes and interstices lof the fabric.

The support for the fabric has a certain degree of resiliencysuiicient to normally press the fabric rather tightly ,against the container. This tight contact is maintained through the entire periphery with the exception-of a small space between the fabric and the container at the admission end. This small space is for the .purpose of allowing an easy start for the lubricant along its travelY between the fabric and-.the container. The' ends of the'supportextend short of the ends of the container and have the fabric overlapping and extending slightly inwardly of the support. At both ends, a split resilient spring wire is applied to hold the fabric in place. At the oil deliveryend the fabric is preferably attached in anysuitable way of supporting the screen.

The Outlet to the filter preferably comprises a length of tubing which extends to substantially the filters mid portion, and

leaves. the filter at the center of the cOntain-' ers end. This arrangement ofthe outlet is made in order that the Ibottom of the filter may serve as a settling chamber. Should any im-i purities get around the filter ends, or at the cloth end,or through the fabric, it will arrive at the center lportion -of the filter and ten to settle *at the bottom.

Asan optional construction instead of providing theplate at the inlet, it is within the sol scope of the invention to eliminate the plate entirely and extend the supporting screen and fabric to the point of attachment of the plate of one end of the filter showing the lighter or heavier wire of the supporting screen, and

the manner of securing the fabric to the screen end within the filter.

Figure 4 shows a modification. Referring to Figure 1, the numeral 1() indicates a metallic container of any suitable type, but preferably cylindrical, having the inlet pipe 12 and the outlet pipe 14.

The filter is preferably positioned as shown in Figure 1, the oil arriving at the inlet at the top and leaving at the 'outlet 14 positioned at the center of one of the filter ends 16 or 18.

Secured to the inside of the filter at a point 20 adjacent the inlet 12 is a plate like member 24, which is spaced from the container 10 to form a space 26, which extends the entire length of the filter and is adapted to receive the liquid to be filtered from the inlet 12. This space is for the purpose of allowing the liquid to spread'the entire width of the filter so that a-better filtering is secured.

Secured to the opposite end 26 of the plate 24 is a foraminous supporting member 30, referably in the form of a wire mesh screen, etter shown in Figure 3. This wire mesh screen comprises the relatively heavy gage Wires 32 and the lighter gage wires 34, the purpose of which will be later described. The opposite end 36 of .the supporting screen 30 is free and overlaps and is adapted to slide on the plate 24.

Secured to and supported on the screen 30 is a cloth or fabric 38, the entrance end 40 of which is slightly spaced from the container 10, as is seen in Figure 2. The purpose of this space will be later described. The screen 30 will have considerable resiliency and tend to'expand to force itself against the container 10. Due to this expansion, the fabric 40 is fiatwise and rather tightly held against the inner periphery of the container 10.

Y The ends 42 and 44 of the fabric 38 are preferably folded. as at 46 and extended inwardly of the foramnous member or screen 30. Inside the screen and over this folded portion there are applied the spring rings 48 and 50, open at their ends as shown at v52. The purpose of these rings is to resiliently, securelyand removably hold the. ends of the fabric onto the screen 30.

By referring to Figure 3, it will be noted that the end 55 of the screen 30 extends somewhat short of the end 18 of the container 10. This construction allows for a slight space between the container end and screen end 55, which space is slightly less thanthe width .of the fabric 38 so that when end of the container 10 is applied, the fabric 38 will be pressed between the screen-end 55 and the container end 18. A similar construction is applied at the opposite end 16 of the container 10.

In applying the fabric 38, the nap portion is preferably placed adjacent the inner periphery of the container 10. The purpose of this is to afford a greater surface and more obstruction for the impurities in the oil` to catch on.

By referring to Figure 1, it will be noted that the outiow pipe 14, which has been applied at the center of the end 16, is considerably above the bottom 56 of the filter. The space provides a settling chamber for any impurities or foreign matter which have gotten past the`fabricv 38. During the passage of the lubricant along the surface of the fabric 38 there is the possibility that some impurity may travel to the end of the cloth, or between the cloth end eitherof the , container end 16 or 18. This impurity will reach the center of the filter and settle to the bottom instead of leaving the outflow pipe 14.

Referring to the modification of Figure 4 it will be seen that the plate 24 may be eliminated and the screen 30 attached'directly to the container 10 as by means of rivets 58. In this species the free end 36 of the supporting screen 30 will have secured thereto an edo'e piece 60 to permit the free end to readily sli e 48 and 50 in passing through the filter. As'

the pressure increases the oil will be forced between the fabric 38 and the inner periphery of the container 10, the space 40 allowing for the initial entry of oil. This increased pressure will cause the screen 30 to coil up due to the fact that itsend 36 is free and may roll up and slide over the surface of the plate 24. As the pressure increases, the'oil will be forced farther and farther along the surface o f the cloth until it reaches the end 52, from where it will flow through the supporting screen 30 and drop to the inner portion of the filter. As the oil accumulates, the level will finally rise to the level of the outlet pipe 14, from Where it will How and be between the bottom 56 and outlet 14 l 'l sage through the filter.

vconducted to any suitable point by means of the outflow pipe 54. .1

l I claim:

1. In a filter, the container inletand outlet means in said container, a fabric mounted in said container, means for causing the liq- 'pressure of the liquid to be filtered so as t0 cause said liquid to travel longitudinally over .substantially the entire surface of said fabric between the fabric and container in its pas- 3. In a filter, inlet and outlet means therefor, a container, a fabric in .said container held thereagainst, a support forsaid fabric,

said support adapted to yield in response to v the-pressure of the liquid to be filtered so as to cause said liquid to travel over the surface of said fabric in its passage through the filter, said support including a Wire mesh fabric having the Wires running yin one direction of a heavier gage. q i 4. In a filter, inlet and outlet means therefor, a container, a fabric in said container held thereagainst, a support for said fabric, said support adapted to yield in response to the pressure of the liquid to be filtered so as to cause said liquid to travel over the surface of said fabric in its passage through"the filter, said support includin a wire mesh fabric' having th'e wires runnln in'Y the direction of' the flow of liquid to be ltered of a heavier gage.

v5. In. a filter, inlet and outlet means therefor, a container, a fabric in said container held thereagainst, a support for said fabric',

said support adaptedto yield in response to the pressure of the liquid to be filtered so as to cause said liquid to travel over the surface of said fabricin itspassage'through the filter, and a metallic plate for securing said sup-l port to the container. v A v 6. In an oil filter,.inlet and outlet means therefor, a foraminous member secured at one of its ends, its other end bein free, a plate like member for securing sai foraminous member to the'inside of said container, said plate like member` spaced from said container to forma space at the liquid inlet and the free end ofsaid foraminous member slidably overlapping said plate, and a fabric mounted on saidy foraminous member and resiliently held against said container, the liquid in itsftravel through the filter 0being forced to travel over the surface of the fabric throughout its length. I

.. 7. .The invention of claim 6, and a settling chamber below said outlet means.

8. The invention of claim 6, and a resilient. ,member for holding said fabric on said foraminous member. I

9. In a filter, a-contamer, inlet and 'outlet means therefor, a filteringfabric 1n sald container, a foraminous member free at one end for supporting said fabric against the interior Wall of said container, said member causing substantially all of the liquid to befiltered to pass between the fabric and container. 1

10. In a filter, a container, inletand outlet means therefor, afiltering fabric in said container, andi a foraminous memberA rigidly mounted at one end to the container wall for supporting said fabric` against the interior wall of the container., saidmember causing substantially all ofthe liquid to be filtered \to pass between the fabric and container.

. 11. In a filter, a container, inlet and outlet' means therefor, a filtering fabric in said container, and a foraminous member rigidly mounted at the container Wall at one end and vfree at its other end for supporting said fabric against 'the interior wall of the container, said member causing substantially all of the liqud to be filtered to pass between the fabric and container.

l2. In a filter, a container, inlet and outletv means therefor, a filtering fabric in saidcontainer, and a foraminous member secured to said container for supporting said fabric resiliently against the interfor wall of the container, said member causing substantially all of the liquid to be filtered -to pass between the fabric and container.

13.I In a filter, a cylindrical container, inlet and outlet means-therefor, a filtering fabric in said conta'ner,a cylindrical foraminous member rigidly muntedin said container and supporting said fabric over substantially itsentireextent against the interior wall of said container.

14. In a filter, a container, inlet and outlet' means therefor, a filtering fabric in said container, a foraminous member rigidly mount-' ed in said container and supporting said fabric `over substantially its entire extent against the interior wall of said container, and a settling chamberin said container below said outlet. *Y

15. In a filter, a container, an inlet, an outlet at the mid portion of the container, a filtering fabric in said container, and a, foraminous member rigidly mounted at one end thereof at the inner "Wall of said container for supporting said fabric on one side only. l Y

A 16. In a filter, a container, an inlet and an outlet for said container, a filtering fabric,

anda foraminous member mounted in said and member extendingronly' at the face of said container.

17. In a filter, a container, an inlet at the inner suri side center portion thereof, a filtering fabric 4in the filter, and a foraminous membersupporting said fabric against the containers interior, said support and container providing a space at the inlet extending longitudinally of the filter.

V 18. In a filter including a container, a foraminous supporting member in said filter, a filtering medium over said member, said medium held tightly against the ends and re- ,siliently against the sides of the filter con- -tainer by said member, and means to secure said medium throughout substantially its y tainer. f

entire extent at the inner periphery7 of said container in resilient relation, and an outlet for said container.

2l. In a filter, a container, inlet and outlet means for said container, a filtering fabric,`a foraminous member mounted in-said container and resiliently holding said fabric flatwise against the containers interior,'said fabric and member being substantially coex-` tensive with the inner surface of the con- 22. In a filter, inlet means to said filter, a filtering medium in said fi/lter, means for holding said medium flatwise against the fil- "ter, said fabric andrmember vbeing substantially vcoextensive with the inner surface of the lter, and an loutlet from said lter. 23. In a filter, a container, inlet and outlet of the liquid to be filtered thereby causing substantially all of said liquid yt'o travel over substantially the entire surface and to the s end of said fabric in its passage through the filter, said fabric having its nap arranged directly against the container.

26. In a filter, a container, inlet and outlet ymeans therefor, a fabric in said container held thereagainst throughout substantially 4its entire extent, a support for said fabric,

said'support yielding in response to the pressure of the liquid to be filtered thereby causing' substantially all of said liquid to travel oyer substantially the entire surface and to the end of said fabric in its passage through the filter, said fabric and container arranged to provide a space therebetween at one of the fabric ends.

27. In a filter, a container, inlet and outlet means therefor, a fabric in said container held thereagainst throughout substantially its entire extent, a support for said fabric, said sup ort yielding in response to` the pressure of t e liquid tobe filteredthereby causing substantially all of said liquidto travel over substantially the entire surface on one side of said fabric in its passage through the filter, said container and support forminga lrecess or space at the inlet extending the length of the container to allow for the read infiow of the liquid to be filtered.

28. In a filter, a cylindrical reticulated supportingmember secured in said filter, and a filtering medium secured to and .positioned on one side only of said member 'and held therebyagainst the filter walls throughout substantially its entire length, the fluid to be filtered passing lengthwise over said medium in passing through the filter. f

In testimony whereof I-affix mysignature. LLOYD BLACKMORE.

means therefor, a filteringfabric in said container, and a foraminous member free at one end and positioned adjacent `the inner periphery of the container vand pressing said fabric over substantially its entire extent-outwardly 0f the container, said 'member causing the liquid to be filtered to pass between the fabric f and the container.

24. In a filter, a container,

tainer, a foraminous member rigidly mount- A inlet and outlet l means therefor, a filtering fabric in said con 12.0y

throughout substantially its entire extent against the interior of the container, said member causing theliquid to be filtered to pass between the fabric'and the container. 25.. In a filter, a container, inlet and outlet v means therefor, a lfabric in said container held thereagainst throughout substantially its entire extent, a support for said fabric, saidl support yielding in response to the pressurev ibol

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