SE539589C2 - Spin-on filter gasket protection device - Google Patents

Abstract

14 ABSTRACT The invention relates to a spin-on filter gasket protection device for a spin-on filter (2), the spin-on filter (2) having at least one gasket (28) arranged between a corresponding filter mount (4) andthe spin-on filter housing (6) at respective gasket contact surfaces (32, 36) When the spin-on filter(2) is mounted on the filter mount (4), Where the spin-on filter gasket protection device (34) isarranged to be mounted on the spin-on filter housing (6) Where the spin-on filter gasketprotection device (34) is arranged to eXtend between an outer surface (38) of the spin-on filterhousing (6) and an outer surface (40) of the corresponding filter mount (4) outside (E) of therespective gasket contact surface (32, 36) for the outermost spin-on filter gasket (28). Theinvention also relates to a spin-on filter (2) comprising a spin-on filter gasket protection device(34), and a spin-on filter gasket protection arrangement, and an engine (50) and a vehicle (48) comprising a spin-on filter gasket protection arrangement. (Fig. 1)

Description

The present invention relates to a spin-on filter gasket protection device and a spin-on filtercomprising a spin-on filter gasket protection device and to a spin-on filter gasket protectionarrangement, and an engine and a vehicle comprising a spin-on filter gasket protection arrangement.

BACKGROUND OF THE INVENTION AND RELATED ART Spin-on filters comprising a filter body defining a mouth, a filter element disposed in the filterbody, and a cover covering the mouth are widely used in e. g. engines and gear boXes as e. g. oilfilters or fuel filters etc. due to their simple yet reliable design and their easy attachment, removaland replacement. The cover comprises at least one inlet opening and at least one outlet openingfor the fluid to be filtered by the filter, where the fluid to be filtered is arranged to pass throughthe filter element on its way from the inlet to the outlet. The spin-on filter further comprisesmeans for attaching the filter to a filter mount on the device utilizing the filter, which meanscomprise a thread on the filter which thread is arranged to be brought into engagement with acorresponding thread on the filter mount. Usually, the spin-on filter comprises a first centralopening in the cover, the opening having an internal thread to be brought into engagement with acorresponding external thread on the filter mount. The corresponding filter mount thus usuallycomprises a corresponding central tubular member comprising said external thread on its outerperiphery. The cover further comprises at least one further opening, usually a number of furtheropenings, arranged on the cover between the central opening and the radial periphery of thecover. The filter mount comprises corresponding members, e.g. at least one opening and apossible cavity connecting said opening to the further openings in the cover when the spin-onfilter is mounted onto the filter mount. lf the central opening is the outlet opening from the spin-on filter, the further openings are inlet openings. The above threads together form a sealpreventing fluid from passing therethrough. To prevent fluid from leaking out between the filter mount and the filter, at least one gasket is arranged between the filter and the filter mount radially outside of said further holes. Said gasket is usually arranged fixed to the filter, but may also be a part separate therefrom. lt is very important that the surface on the filter mount arranged to abut against the filter gasket isfree from particles such as e.g. dirt etc. in order to avoid leaks between the gasket and the filtermount, this leading to fall in pressure in the fluid system in question and to pollution of theenvironment and surrounding components e.g. on a vehicle chassis. This problem is especiallyrelevant in applications where the spin-on filter in use is exposed to a environment containing dirtsuch as e. g. in the area surrounding the chassis of a vehicle when the filter is to be replaced afterhaving been exposed to dirt etc., and is traditionally addressed by carefully cleaning the surfaceon the filter mount after removal of the old filter but before mounting of a replacement filter thereon.

US 5,8l7,232 A shows a spin-on filter.

SUMMARY OF THE INVENTION The primary object of the present invention is to provide a spin-on filter gasket protection device.

The above mentioned object of providing a spin-on filter gasket protection device is achieved fora spin-on filter gasket protection device for a spin-on filter, the spin-on filter having at least onegasket arranged between a corresponding filter mount and the spin-on filter housing at respectivegasket contact surfaces when the spin-on filter is mounted on the filter where the spin-on filtergasket protection device is further arranged to be mounted on the spin-on filter housing and isarranged to extend between an outer surface of the spin-on filter housing and an outer surface ofthe corresponding filter mount outside of the respective gasket contact surface for the outermostspin-on filter gasket, the spin-on filter gasket protection device thus being able to keep the filtergasket and the area surrounding the filter gasket clean between replacements. A further advantageis achieved when the filter is used in applications where the device carrying the filter mount is tobe painted after mounting of the filter to the filter mount, thus avoiding the paint to reach the filter gasket and avoiding a “bonding by paint” of the filter gasket outer edge to the filter mount Which then Would require removal of paint from the filter mount near the filter gasket at filter replacement.

Further, the objects of providing a spin-on filter comprising a spin-on filter gasket protectiondevice, and a spin-on filter gasket protection arrangement, and an engine and a vehiclecomprising a spin-on filter gasket protection arrangement are achieved for a spin-on filter, a spin- on filter gasket protection arrangement, and an engine and a vehicle. ln accordance With one embodiment a Spinspi_n-on filter gasket protection device for a spin-onfilter is provided. The spin-on filter has at least one gasket arranged to seal between a filter mountand the spin-on filter housing at respective gasket contact surfaces. The spin-on filter gasketprotection device is further arranged on the spin-on filter housing and is arranged to eXtendbetWeen an outer surface of the spin-on filter housing and an outer surface of a filter mount outside of the respective gasket contact surface for the outermost spin-on filter gasket.

According to one embodiment, the spin-on filter gasket protection device is arranged integrated With the outermost spin-on filter gasket to one unit.

According to one embodiment, the spin-on filter gasket protection device has the shape of a truncated holloW cone Which is rotationally symmetrical about the centre aXis thereof.

According to one embodiment, the spin-on filter gasket protection device is fleXible and has acentral inner opening having an inner diameter smaller than the outer diameter of the spin-on filter housing.

According to one embodiment, the spin-on filter gasket protection device has a holloWsubstantially cylindrical intermediate body Which is rotationally symmetrical about the centreaXis thereof, and further has respectively integrally With the intermediate holloW body arranged atruncated holloW cone at an open end of the filter gasket protection device and a dome-shaped holloW end closure at the closed end of the filter gasket protection device.

According to one embodiment, the spin-on filter gasket protection device is fleXible and has acentral inner cavity having an inner mouth opening having an inner diameter smaller than the outer diameter of the spin-on filter housing.

According to one embodiment, the spin-on filter gasket protection arrangement comprises a spin- on filter gasket protection device, and further comprises a spin-on filter and a filter mount.

According to one embodiment, the spin-on filter gasket protection device is arranged to bepressed against the filter mount While undergoing fleXible deformation When the spin-on filter is mounted on a corresponding filter mount. ln accordance With some embodiments the protection device is provided as a separate item that can be mounted on a spin-on filter on the filter housing thereof. ln accordance With one embodiment the spin-on filter gasket protection device has the shape of a truncated holloW cone Which is rotationally symmetrical about the centre aXis thereof. lnaccordance With one embodiment the protection device has a holloW substantially cylindricalintermediate body Which is rotationally symmetrical about the centre aXis thereof, and further hasrespectively integrally With the intermediate holloW body arranged a truncated holloW cone at anopen end of the filter gasket protection device and a dome-shaped holloW end closure at the closed end of the filter gasket protection device.

These and other advantageous features will be apparent from the detailed description below.

The invention will now be described in more detail below with reference to the appended drawings which illustrate preferred embodiments of the device according to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows schematically a cross-section of a spin-on filter and a corresponding filter mount and a first embodiment of a spin-on filter gasket protection device according to the invention, Figure 2 shows schematically a cross-section of a spin-on filter and a corresponding filter mount and a second embodiment of a spin-on filter gasket protection device according to the invention, Figure 3 shows schematically a cross-section of a spin-on filter and a corresponding filter mountand a third embodiment of a spin-on filter gasket protection device according to the invention, and Figure 4 shows a view of a chassis for a vehicle, e. g. a commercial vehicle, e.g. a truck or a bus, comprising an engine, comprising a spin-on filter gasket protection device for a spin-on filter.

DESCRIPTION OF PREFERRED EMBODIMENTS The same reference numerals are being used for similar features in the different drawings.

Figure 1 shows schematically a cross-section of a spin-on filter 2 and a corresponding filtermount 4 arranged on a device to which the spin-on filter 2 is to be attached during operation ofthe system containing the fluid 20 to be filtered by the spin-on filter, where the spin-on filter 2comprises a spin-on filter housing 6, the latter comprising a filter body 8 defining a mouth 10 andfurther possibly comprising a cover 12, where the spin-on filter 2 further comprises a filter element 14 disposed in the spin-on filter housing 6. The spin-on filter 2 is mounted on the corresponding filter mount 4 during operation, in this embodiment by that the spin-on filter 2comprises an internal thread 16, arranged to be brought into engagement with a corresponding external thread 18 on the filter mount 4. ln this embodiment, the cover 12 comprises at least one inlet opening and at least one outletopening for the fluid 20 to be filtered by the spin-on filter 2, but it is possible to arrange some orall of these openings on the filter body 8 instead if the mouth 10 is of such narrow dimensionsthat a cover 12 is not present. ln this embodiment, the central opening is the outlet opening 22 ofthe spin-on filter 2, and a number of inlet openings 24, 26 are arranged in the cover 12 radially outside of the central opening 22 in the cover 12. ln operation, when fluid 20 is carried through the spin-on filter 2, the fluid 20 is usually under apressure higher than the ambient pressure outside of the filter mount 4 and the spin-on filter 2.The above corresponding threads 16, 18 of the spin-on filter 2 and the filter mount 4 togetherform a seal preventing fluid from passing therethrough, thus forcing all of the fluid 20 flowing(see dashed arrows in figure 1) through the spin-on filter 2 to pass through the filter element 14.At least one gasket 28 is arranged between the spin-on filter housing 6 and the filter mount 4 inorder to prevent fluid 20 from leaking out therebetween during operation. The gasket 28 ispreferably fastened to the spin-on filter 2, preferably already at manufacture, and the spin-onfilter 2 is then surrounded by a wrapping (not shown) thus allowing for keeping it clean until thewrapping is removed just prior to the mounting of the spin-on filter 2 to the filter mount 4, tofacilitate ease of mounting. The gasket 28 could optionally be arranged separate from the spin-onfilter 2. ln this embodiment, the surface 30 on the gasket 28 which surface 30 is arranged to abutagainst a gasket contact surface 32 on the filter mount 4 is preferably “moistened” by oil prior to the mounting to further enhance the sealing properties of the gasket 28.

A spin-on filter 2 may comprise one gasket 28 or multiple, preferably coaXially arranged, gaskets.

Here is shown one gasket 28 only. ln case of multiple gaskets (not shown), the gasket 28 is arranged as the outermost gasket 28.

Figure 1 further shows a first embodiment of a spin-on filter gasket protection device 34 for a spin-on filter 2 according to the invention, wherein the spin-on filter gasket protection device 34is to be arranged on a spin-on filter housing 6, and when the spin-on filter 2 is mounted to acorresponding filter mount 4, and when at least one gasket 28 is arranged between the filtermount 4 and the spin-on filter housing 6 at respective gasket contact surfaces 32, 36, is arrangedto eXtend between an outer surface 38 of the spin-on filter housing 6 and an outer surface 40 ofthe filter mount 4 outside E of the respective gasket contact surface 32, 36 for the outermost spin- on filter gasket 28. ln this embodiment, the spin-on filter gasket protection device 34 is arranged to the spin-on filter2 in a manner of a “skirt”, i.e. the spin-on filter gasket protection device 34 has the shape of atruncated hollow cone which is rotationally symmetrical about the centre aXis thereof, as can beseen in the figure. The spin-on filter gasket protection device 34 is preferably, at least somewhat,flexible and preferably has a central inner opening 42 having an inner diameter, at leastsomewhat, smaller than the outer diameter of the spin-on filter housing 6, the rim of the inneropening 42 of the spin-on filter gasket protection device 34 thus being pressed against the outersurface 38 of the spin-on filter housing 6 thus effecting an effective seal between these. Thepreferred flexibility of the spin-on filter gasket protection device 34 also allows for similar pressand seal against the outer surface 40 of the filter mount 4 when the spin-on filter gasketprotection device 34 arranged on the housing 6 is pressed against the filter mount 4 while undergoing flexible deformation.

Figure 2 shows a second embodiment of a spin-on filter gasket protection device 34 for a spin-onfilter 2 according to the invention, wherein the spin-on filter gasket protection device 34 is to bearranged on a spin-on filter housing 6, and when the spin-on filter 2 is mounted to acorresponding filter mount 4, and when at least one gasket 28 is arranged between the filtermount 4 and the spin-on filter housing 6 at respective gasket contact surfaces 32, 36, is arrangedto eXtend between an outer surface 38 of the spin-on filter housing 6 and an outer surface 40 ofthe filter mount 4 outside E of the respective gasket contact surface 32, 36 for the outermost spin- on filter gasket 28. ln this embodiment, the spin-on filter gasket protection device 34 is arranged to the spin-on filter 2 in a manner of a “hat”, i.e. the spin-on filter gasket protection device 34 has a hollowsubstantially cylindrical intermediate body which is rotationally symmetrical about the centreaXis thereof, and further has respectively integrally with the intermediate hollow body arranged atruncated hollow cone at an open end of the filter gasket protection device 34 and a dome-shapedhollow end closure at the closed end of the filter gasket protection device 34, as can be seen inthe figure. The spin-on filter gasket protection device 34 is preferably, at least somewhat, fleXibleand preferably has a central inner cavity 44 having an inner mouth opening 46 having an innerdiameter, at least somewhat, smaller than the outer diameter of the spin-on filter housing 6, therim of the inner mouth opening 46 of the spin-on filter gasket protection device 34 thus beingpressed against the outer surface 38 of the spin-on filter housing 6 thus effecting an effective sealbetween these. The preferred flexibility of the spin-on filter gasket protection device 34 alsoallows for similar press and seal against the outer surface 40 of the filter mount 4 when the spin-on filter gasket protection device 34 arranged on the housing 6 is pressed against the filter mount 4 while undergoing flexible deformation.

Figure 3 shows a third embodiment of a spin-on filter gasket protection device 34 for a spin-onfilter 2 according to the invention, wherein the spin-on filter gasket protection device 34 is to bearranged on a spin-on filter housing 6, and when the spin-on filter 2 is mounted to acorresponding filter mount 4, and when at least one gasket 28 is arranged between the filtermount 4 and the spin-on filter housing 6 at respective gasket contact surfaces 32, 36, is arrangedto eXtend between an outer surface 38 of the spin-on filter housing 6 and an outer surface 40 ofthe filter mount 4 outside E of the respective gasket contact surface 32, 36 for the outermost spin- on filter gasket 28. ln this embodiment, the spin-on filter gasket protection device 34 is arranged to the spin-on filter2 in a manner of a “skirt”, i.e. as shown in the embodiment shown in Figure l, which isintegrated with the outermost spin-on filter gasket 28 to one unit, the parts of which unit can beof the same material or differing materials depending e.g. on the flexibility and other propertiesdesired for the different parts thereof. The spin-on filter gasket protection device 34 is preferably,at least somewhat, flexible and preferably has a central inner opening 42 having an inner diameter, at least somewhat, smaller than the outer diameter of the spin-on filter housing 6, the rim of the inner opening 42 of the spin-on filter gasket protection device 34 thus being pressedagainst the outer surface 38 of the spin-on filter housing 6 thus effecting an effective sealbetween these. The preferred flexibility of the spin-on filter gasket protection device 34 alsoallows for similar press and seal against the outer surface 40 of the filter mount 4 when the spin-on filter gasket protection device 34 arranged on the housing 6 is pressed against the filter mount 4 while undergoing flexible deformation. ln a similar manner (not shown), the spin-on filter gasket protection device 34 of figure 2 could be integrated with the outermost spin-on filter gasket 28 to one unit.

As can be seen in figures l to 3, the invention relates to a spin-on filter gasket protection device34 for a spin-on filter 2, the spin-on filter 2 having at least one gasket 28 arranged between acorresponding filter mount 4 and the spin-on filter housing 6 at respective gasket contact surfaces32, 36 when the spin-on filter 2 is mounted on the filter mount 4, where further the spin-on filtergasket protection device 34 is arranged to be mounted on the spin-on filter housing 6 and isarranged to eXtend between an outer surface 38 of the spin-on filter housing 6 and an outersurface 40 of the corresponding filter mount 4 outside E of the respective gasket contact surface32, 36 for the outermost spin-on filter gasket 28. The invention also relates to a spin-on filtergasket protection arrangement, the spin-on filter gasket protection arrangement comprising aspin-on filter gasket protection device 34 and further comprising a spin-on filter 2 and a filtermount 4. The invention further also relates to a vehicle 48 comprising a spin-on filter gasketprotection arrangement, an engine 50 comprising a spin-on filter gasket protection arrangement, and a spin-on filter 2 comprising a spin-on filter gasket protection device 34 for a spin-on filter 2.

The protection device 34 can thus comprise a lip eXtending in a direction out from the side wallof the filter housing 6. The lip can preferably be of the same material as the main body of theprotection device 34, but can also be of a different material. For example, different materials asset out below can be used or combined in the protection device. The lip acts to form a sealbetween the outer side surface of the spin-on filter and a surface, in particular a top surface, of afilter mount 4 on which the spin-on filter is to be mounted. The lip can in some embodiments eXtend in a direction out from the side wall of the filter housing, i.e. out from the centre of the rotationally symmetrical protection device 34. The lip can preferably project at an angle, such asabout 45 degrees, out from the centre line of the protection device in a direction towards the surface of a mount 4 to which the protection device is to seal.

Figure 4 shows a view of a chassis for a vehicle 48, e.g. a commercial vehicle, e.g. a truck or abus, comprising an engine 50, the vehicle 48 comprising a spin-on filter gasket protection device34 for a spin-on filter 2, e.g. by that the engine 50 or some other part of the vehicle such as e. g. agear box or an axle, etc., comprises a spin-on filter gasket protection device 34 for a spin-on filter2 according to one embodiment mentioned above. The body of the vehicle 48 is not shown forreasons of clarity regarding the examples of possible uses of the spin-on filter gasket protection device 34.

The material for the spin-on filter gasket protection device 34 may e.g. be natural rubber,synthetic rubber, foamed rubber, metal, etc. other materials having the preferred flexibility. Thespin-on filter gasket protection device 34 has to show some stiffness in order to maintain itsdesired shape, but is not exposed to high pressures in normal use. The gasket 28 can e.g. be made of nitrile rubber, etc.

The spin-on filter gasket protection device 34 may be a reusable part or a disposable article.

The features of the embodiments discussed above may be combined in further ways than those explicitly described in the embodiments above.

Claims (1)

1. lll lfš 11 CLAlh/lS : Stina-tili filtar gashet protecftion devfictf for a spin~on filter (2), the spin~on lilter (2) liaving atleast one gaslaet (28) arranged to seal hetwerëri av filter niount (4) and the spin~on filter liousing(ö) at respective. gaskat contact surfzrcrss (32, šo), cliararzteirizerl irl., that the spin-tan tiltergasltet protection rlrsvica (34) is further arrangarl to he niounted on the spin-on filtar housing(o) and is arrangrfd to exterid between an outei* surface (3 til' the spin-on tiltar liousnig (6)and an outar surface (49) of the corresprriiding filter rnount (4) outside (E) of the respective. gaslaet contact surface (32, 36) for the riuterrnost spiricn filter gasltet (28) Strain-oli filtar' gasket protaction device according to clairn l , characterized iii., that the spiri~on 'filter gasltet protectiori dei/ica (34) is arrangati integrated vvith tha outarniost spirr-oii filtar' gasket (28) to one 'uiiit Spin-on filter gasltet protection riavica according to c1aini 1 or 2, oharaeterized in, that thesIoiri-oii filtar' gasket protection device (34) has the sliape of a trnncatati iiolirvvv cone tvhicli is rotational l y s yfrrrrnatrieal about the centre axis thereol". Split-tvn filter gasltet protection tlevice according to elaini 1 or 2 or 3, characterlzed in, thattha spin-on filtar' gasket protection device (34) is flexibla and has a eantral inner' opening (42) liaving an iriner diaineter sniallar' than tha outar' rliarneter of the spin-on filter liousirig (ti), Stein-on filter' gasket protection device accrrrdirig to claiin l or 2, eliaracterized in, that thespiri-oii filter gasltet iïrroteetion device (34) lias a hoilow sulïsstantially cylindrical iriternrediatebody' vvhiali is rotationally syrninetrieal about the centra axis thereof, and ftirtlier' hasresiïrectitfelyf integralljv' With the interrnerliate hollova' hody arranged a truncatetl hollow cone atan open and of the filter gashet protection rlevfice (34) arid a derna-Shaped lrollovv' end closure at the closed end of the filter gasket iirotection device (34). Spin~on filter gasket protection device according to claini l or 2 or 5, eharacterizetl in, that the spirit-on filter gasltet protection device (34) is flexihle and lias a central inner cavity (44) lt) lfš ti). li, 12. 14» haviiig an inner inouth opening (46) having an inner diaineter' srnaller than the outer dianieter of the spin~on filter housing (6) Spin~on filter, eharaeterized in, tliat it coniprises a spin-on fiiter gasiret protection tievice (_34) for a spin~on filter (2) aceiortiing to one of clainis l to 6. Spin~on filter' gaslcect protection arrangernent ihr a spin~on iiiter (2), ehairacttëriïrtcd in., that itconipriscës a spin~on filter gasket protection tittat/ice (34) according to tone otieiairns l to o, and tiirtiier ttiriniprises a spin-on filter (Z) and av filter nftrinnt (4), Spira-ort filter gasiret protecftion arrangenftent actttiiftiiiig to claini 8, eharaeteeriztëd in, that thespin~on filter housing (ti) conipristfs a filter hody (8) deiinirtg a rnouth (19), and tiïtat the spin- ori filter' (2) further cornprises a tilter eiernent (lll) riisposed in the :Artin-fira filter hottsirrg (6). Spin-on filter gasltet protection arrangerneiit according to clairn 9,, citnraetcirized in., that the spin-ort filter housing (6) further cornprises a etiver' (12). Spin-on filter gasltet protection arrangerneiit according to clairrr lt), citnraeteirized iii, that thecover (12) cornpri at least one inlet opening (24, 26) and at least one (autlet tipenlrrg (22) for the titiiti (29) to he 'liltered hy the sriin-rirr filter (2). Spin-on filter gasket protection arrangeinent according to one of clairris 8 to l l,enaracterized in, that the sitvin-oii filter (2) is arranged to he rnoniiterl on the corresprindirigfilter rnount (4) hy that the spin-on filter (2) coinprises an internai thread (16) arranged to lie lirouglit into engagerneiit vvitli a corresponding external tiireacl (i 8) on the filter' rnount (4). ' . Spin-on filter gasket protection arrangenient according to one of ciaiins 8 to 12, eharacterized in, that the spin~on filter gasket protection device (34) is arranged to thepressed against the fiiter niount (4) ivhile nndergoing fiexihle deforination When the spiri-oii filter (2) is nionnted on the corresponding filter nionnt (4), Engine, characterized in, that it cornprises a siiinnori filter gaslcet protection arrangeinent for a spin-on filter (2) according to one of clainis å? to l2. 15, Xfehicíe, charactefizeai m, thai it compriscs ax: nnnnn: .In nfnnßnn» Wn ._n_ nnhnnnn:n;;\n_-..n_nnf_n..n bn). n. : ¿,__.n_\ n_n_n nnn_n.fn,_nn~_n..n;;\ n_n.- ___. _ n,_n wnnnbnnnø n. _,n.- nå., k.)'r ~' -. . »__ -. \ i., . __ . _ __ :'^\.^ ._ .f n -_ï_-__.-_--n~_ “fn-_ .ä f -_ 0:. _1-n , _ »__._,n V... , n n). n. n, _ n: n.-n_n _n_n_.nn.-_ n _n.- n_\n;_\ n \- g., _ _n_nnn_\ nnwnnn _n n,n.-n._n n.n_\n; _.n_nnn_n. _ _ . _ _ _ .__ _ _ _ »än _____.-~ -_n-_-_- -n-.nn .___ ._n~___-____--__«_~ __ *n ~-~__nn»~_~. 1,3 ~n _ v- »___ »_ -_ ._ .__n n) J 1- n n: !_ ,'\_ !_n\f \_\.~ I nåt, n n _ nvlçf \v) n ,: n»'-\~n.\l_nn\fnß \ n),n\_!_n n\_n-.\.n _ ),\.f.*\ nk. ,nn~.' 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