US2183877A - Oil filter - Google Patents

Description

Dec. 19,- 1939.l

J. W. WILKINSON AE'l' AL on. FILTER Filed June 15, i957 am m m wwmmfmm I .1.1, u i

PatentedDec. 19, 1939 .UNI'IED STATESPPATENT OFFICE 2,183,811 y James W. Wilkinson and William Morgan, Leicester, Mass., and Thomas Edward Aldham, Providence, B. I., assignors to li'lemingr Manufacturing Company, a corporation of Rhode Island Application Junel, 1937, Serial No. 148.328 s calms. (cl. 21o-131) This invention relates to an oil filter, more particularly of the type-to be used in connection with an internal combustion engine such as an automobile engine. One of the objects ofthe invention is to provide van inexpensive lter with a removable cartridge so that the -accumulation of impurities gathered in the cartridge from the oil may be thrown 'away with the used. cartridge and the same replaced from timesto time with a fresh cartridge whereby the oil will be kept clean. .y Another objectof the 'invention is to enable the filter cartridge to be removed with the cover for the outer casing by means of the cover for c the casing acting as a handle for manipulation.

l5 Another object of the invention is to provide a cartridge which, although attached to the cover cartridge which isimounted on the bag and whichserves as a spacer to locate the bag'with reference to the outlet opening and also a means for detachably connecting Athe cartridge to the cover.

Another and more specific object of the invention is the provision Vof spurs on the'attaching member to be-inserted into the fabric of a `bag cartridge by a relative movement of the two parts whereby the bag is securely attached to this spacing member and forms with it a unit which will be placed into orremoved from the casing and thrown away as a complete assembly. With these and other objects in view, the invention consists of certain'novel features of. construction; as will be more fully described, and particularly pointed out in the appended claims. In the accompanying drawings' Fig'. 1 is a sectional view through the iilter assembly;

Fig. 2 is an elevation'of the bag portion of the cartridge and showing the spacing part and cover 5 for the casing in section with a portion of the bag broken away to show itsinterlor;

Fig..3 isa sectional view through the bag porv -ftion of the cartridge and 'its cap along one part.

oi the attachment and on substantially line 3-3 Fig. 4 is a sectional view uke'mg. 3 with the bag omitted;

Fig. 5 is a sectional view on line I-I of Fig. 2,

showing the interlocking connection between the' cartridge and the cover;

Fig. 6 is a. perspective'view of a fragmental portion of the detachable means for connecting the cover to the cap member of the cartridge.

Fig. 'I'is a top plan view of the central portion of the spacing member which is attached to the 10' bag part of the cartridge;

Fig. 8 is a perspective view. of the hands of a person attaching the bag to the cap member of lthe cartridge;

Fig. 9 is largely an elevation of the assembly l5 at right angles to that shown in Fig. 1 with a part in section.

Oil lters for automotive usel require in some instances an inexpensive filter. .It is also desirable that connections of pipes andthe like be au not disturbed in the replacing ofthe cartridge when the same may have-become saturated or have collected therein a material amount of impurities gathered from the oil which is circulated through the same; and in order to provide for 25.

this a cartridge is inserted in the casing which may bel removed and discarded when occasion requiresaand we have provided a simple, inexpensive cartridge which consists ofa fabric bag of iilter material and a cap attached to this bag; 30 the attachment of the cap to the bag being by a very simple expedient which may be easily .and quickly applied, and we have in turn provided a detachable connection between the cap and the cover for. the casing which will enable the cover 85 to act as va. handle to withdraw the cartridge from the casing after which the cartridge'may be detached from the cover to be discarded; and the following is a more detailed description of the present embodiment of this-.inventicmjllus- 'i0 trating the .preferred means'by which these advantageous resultsy be accomplished: c

With reference to the drawing, l0 designates the casing which is of generally cylindrical shape Y with an integral outwardly bulging end orbottom .4.; wall Il having an opening'V i2 Ywith an inturned collar I3about the opening which is threaded as at I4 for connection to a conduit for insertion of loil into the casing. A cc'veri5 for the bedr portion" I0 of the casing is provided with a daags a@ i6 to extend over the outer upper peripheral edge of the casing with a washer l1 between the cover and the upper edge i8 of the casing for sealing the same when the cover is forced demie auch position. any sent 5 able clamp may be provided for forcing the cover "into, closed position, but we have illustrated as one form a bar I9 which extends over the top of the cover with its ends located in openings 2|) in the upstanding ears 2| which are xed to the outer surface of the casing. Through the center of this bar I9 we provide a threaded opening 22 for the reception of the threaded stud 23 and handle 24, which stud engages a recess 25 in the top ofthe cover so that as the handle is turned the stud will force the cover downwardly to compress the washer i1 and form an effective seal between the cover and the upper edge of the' casing.

This casing bulges outwardly as at 26 with-an outlet opening 21 in the wall at this point. The stock about this opening 21 is turned inwardly as at 28 to provide a' collar which is threaded as at 29 to receive the outlet connection for a conduit to return the oil to the circulating sysem of tho engine or the like, which oil is passed through the filter for cleansing thereof. A sup- -fabric 'of the bag and then in the opposite direction we cause the other spurs porting wall 30 may extend across the lower end of the casing, as illustrated in Fig. l, to span the bulging bottom, although this is not essential for the operation of the filter. i

The cartridge consists of a bag part 3l vand a cap part 32. The bag part is of exible porous material through which oil may seep or be forced, usually of cloth or cotton fabric in .which some suitable filter medium such as cotton waste 33 is packed which may or may not be supported by Vsome rigid or semi-rigid material. The waste is preferably chemically treated so as to cause the filter medium tobe more effective in use.

The cap 32 consists of a dome-shaped piece of material of a rigid character, usually metal, the same being provided with a plurality of openings 34 so that oil which may be forced up into the cap may easily iiow therefrom. This cap has a plurality of spurs 35 and 36 cut from the stock of the cap and deflected inwardly, such as shown in Fig. 4, which spurs are located in pairs at intervals about the dome member orcap near its edge. We have shown in Fig. 4.these spurs as comprising four sets, although any convenient number may be had. There arealso spurs 31 provided by cutting from the stock of the cap and deflecting the same into contact. Then, by a relative rotative motion between the dome-shaped cap and the bag we cause the spurs such as 36 to pierce through the by similarly rotating such -as 35 to -pierce throughthe fabric of the bag. Thus; these spurs 'become firmly attached k to thebag, whereas by rocking action of the dome-shaped cap about the bag we cause the spurs 31`to pierce through the fabric and become attached 'to the 'bag- `Thus,

'65 andin yuse is handled as a unit to' be-inserted or ,f' taken Vfrom the `'casing 'and after use the complete assembly is -.discarded.

,tion the cap is attached to the bag permanently to detachably connect this carand we provide a member, 5, which is welded to the member is desirable tr ge to itheicover l5 'las Shown in Fig r' surface of 1thejcver.y :This

""d lgnate'd'j generally 38, see Fig. 6, and consists of a center portion 39 witharms 40 extending outwardly from this member, which form one inwardly, these spurs being pointed upwardly, as illustrated in Fig. 2.

by this simple opera-r Y Y attaching part, while the other attaching part of the detachable connection between the cap and the cover is formed in the cap by cutting slots 4| in the top of the cap. Thus, the cap and cover may be detachably connected by the ngers 40 of the member 38 passing through the wide portions 42 of the slots in the cap and then by rela-f tive'rotation being moved into the narrow portions 43 of the slots to extend beneath the cap, as shown in dotted lines in Fig. 5. Further, a slot, such as designated in Fig. 1 at 44, is provided for the reception of a screw driver.

After use of the filter the cover may be detached from the casing which, when lifted, draws with it the cartridge comprising both the cap and the bag. This cartridge may then be held by inserting a screw driver in the slot 44 and by rotation of the cover with reference to the cartridge the same may be detached from the cartridge and discarded Without touching the oily cartridge with the hand. Thereafter, the new cartridge may be substituted for the used one by locking the cap onto the cover and the same inserted into the casing and the cover fastened down in a manner which will require but a minute or two to complete the manipulation.

The cap serves not only as a means for detachably connecting the cartridge to the cover but also as a mea-ns for spacing the bag downwardly from the outlet opening 21 so that the bag will not clog this opening, it being understood that the pressure of the oilentering through the inlet opening I3 will tend to force the cartridge upwardly or toward the cover and being held or limited in its upward movement by the cap will expand the cartridge and form a tight seal between the bag and the inner surface ofthe casing IGK.

The foregoing description is directed solely towards the construction illustrated, but we desire it to be Yunderstood that we reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined. and limited only by the terms of the appended claims.

We clailn: v

1. In an oil filter, an outer casing comprising a hollow` body and a cover therefor, inlet and outlet'openings in said casing adjacent the upper and lower parts thereof, a cartridge within the casing comprising a flexible bag of lter vmaterial, means to position the cartridge inwardly from the lower opening. and rigid means connected to the ba'g to position the cartridge inwardly from the upper opening and provided with one part of a detachable means for connection to the cover, the other part of the detachable means being carried by said cover.

2. In an oil filter, an outer casing comprising a hollow body and a cover therefor and having an inlet opening in the lower part of the casing and an outlet opening in the upper part thereof, a. cartridge comprising a flexible bag of lter material in said casing. and rigid means connected f' to the bag and detachably connectedto the cover and serving to space the cartridge bag inwardly of the outlet opening, y

3. In an oil fllter, an outer casing comprising a .hollow body and a `cover therefor and having an inlet opening in the lower part of the casing and an outlet opening in the upper part thereof, a cartridge comprising a exible bag of filter material in said casing, and a rigid dome-shaped member connected to the bag and detachably 4. In an oil lter, an outer casing comprising a hollow body and a cover therefor and having an inlet opening in the lower part of the casing and an outlet opening in the upper part thereof, a cartridge comprising a ilexible bag of lter material in said casing, and a rigid dome-shaped member connected to the bag and provided with one part of a detachably interlocking connection, and a member xed on the cover providing the. other part of said detachable connection.

5. A removable cartridge for a lter comprising a bag of lter material, and a. rigid domeshaped cap xed to the bag and removable therewith as a unit, said cap being relatively steep and shaped to space the bag inwardly of the casingfor the same.

6. A removable cartridge fora lter comprising a bag of lter material, and a, rigid cap xed to the bag and removable therewith as a unit, said cap carrying one part of means to detachably connect the same to a portion of the casing into which it is-inserted. g 'L'A removable cartridge for a filter comprising a bag of lter material, a dome-shapedfcap,

and mechanical means to iix the cap to the bag by relative movements of the cap and bag comprising spurs provided on the cap to pierce and interlock with the bag, said spurs extending inwardly of the cap and disposed in generally opposite directions at intervals about the inner circumferential face of the cap near itsedge.

8. A removable cartridge fora ilter .comprising a bag of lter material, a rigid cap provided with integral means to x the cap to the bag.

9. A removable cartridge for a lter comprising a bag of filter material, a dome-shaped cap,

and spurs integral with the cap to x the cap to the bag, said spurs piercing the bag and interlocking therewith.

- JAMES W. WILKINSON.

WILLIAM MORGAN. 'THOMAS EDWARD ALDHAM.

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