WO2016195568A1

WO2016195568A1 - Oil filter arrangement

Info

Publication number: WO2016195568A1
Application number: PCT/SE2016/050411
Authority: WO
Inventors: Johan GESTNER
Original assignee: Scania Cv Ab
Priority date: 2015-06-01
Filing date: 2016-05-09
Publication date: 2016-12-08
Also published as: SE539590C2; SE1550703A1; DE112016002064T5

Abstract

The invention relates to an oil filter arrangement (2) comprising a spin-on filter (4) and a filter mount (6),where, when the spin-on filter (4)is mounted on the filter mount (6) in an operating position (A) where at least one primary gasket (30) is arranged to provide a fluid tight seal between the filter mount (6) and the spin-on filter housing (10), at least one oil inlet opening (26, 28) arranged on the spin-on filter (4) is arranged to be in fluid connection with at least one oil source opening (36, 38) arranged on the filter mount (6) and at least one oil outlet opening (24) arranged on the spin-on filter (4) is arranged to be in fluid connection with at least one oil distribution opening (40) arranged on the filter mount (6), where the filter mount (6) further comprises at least one oil drainage opening (42) arranged, in the operating position (A), sealed off from the interior (44) of the oil filter (4) by the at least one primary gasket (30) and arranged, in the operation position (A) and in a draining position (B), sealed off from the ambient atmosphere (46) by at least one secondary gasket (48), and arranged,in the draining position (B), in fluid connection with the interior (44) of the oil filter (4). The invention also relates to a vehicle (54)comprising oil filter arrangement (2) and an engine (56) comprising oil filter arrangement (2)and a spin-on filter.

Description

OIL FILTER ARRANGEMENT

FIELD OF THE INVENTION The present invention relates to an oil filter arrangement comprising a spin-on filter and a filter mount, and to an engine comprising an oil filter arrangement, and to a vehicle comprising an oil filter arrangement, and a spin-on filter for an oil filter arrangement.

BACKGROUND OF THE INVENTION AND RELATED ART

Spin-on filters comprising a filter body defining a mouth, a filter element disposed in the filter body, and a cover covering the mouth are widely used in e.g. engines and gearboxes as e.g. oil filters or fuel filters etc. due to their simple yet reliable design and their easy attachment, removal and replacement. The cover comprises at least one inlet opening and at least one outlet opening for the fluid to be filtered by the filter, where the fluid to be filtered is arranged to pass through the filter element on its way from the inlet to the outlet. The spin-on filter further comprises means for attaching the filter to a filter mount on the device utilizing the filter, which means comprise a thread on the filter which thread is arranged to be brought into engagement with a corresponding thread on the filter mount. Usually, the spin-on filter comprises a first central opening in the cover, the opening having an internal thread to be brought into engagement with a corresponding external thread on the filter mount. The corresponding filter mount thus usually comprises a corresponding central tubular member comprising said external thread on its outer periphery. The cover further comprises at least one further opening, usually a number of further openings, arranged on the cover between the central opening and the radial periphery of the cover. The filter mount comprises corresponding members, e.g. at least one opening and a possible cavity connecting said opening to the further openings in the cover when the spin-on filter is mounted onto the filter mount. If the central opening is the outlet opening from the spin- on filter, the further openings are inlet openings. The above threads together form a seal preventing 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. In modern vehicles it is preferred to use compact designs to save space, which can result in a design where a spin-on oil filter cannot be arranged to be mounted to a corresponding filter mount vertically from below, i.e. with the openings in the filter cover facing upwards, but instead has to be mounted e.g. vertically from above the same or horizontally from the side of the same, i.e. at an angle to the first mentioned position. This means that the oil in the oil filter will not remain therein when the engine is turned off but will instead begin to slowly flow back to the oil reservoir, e.g. an oil trough, via e.g. the crankcase, the flow speed being determined e.g. by the temperature of the oil. Thus, when a spin-on oil filter on a vehicle with such a filter mount design is to be replaced by removing the old filter and mounting a new filter in its place, oil will leak out if the filter is removed soon after that the vehicle has been driven to the garage as the oil in the oil filter takes some time to empty to the oil reservoir, more time if the vehicle has been parked for a time outside the garage waiting for its turn to be serviced. This will lead to oil possibly leaking out on the ground, the mechanic, or on possibly sensitive parts of the vehicle.

One way used for speeding up the emptying process mentioned above is to puncture the spin-on oil filter housing using e.g. a screwdriver before removal, which results in air entering the oil filter facilitating the emptying of oil therefrom. US 5,817,232 A and US 2011/0303604 Al show spin-on filters.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide an improved oil filter arrangement comprising a spin-on oil filter and a filter mount.

This is obtained by the oil filter arrangement, the spin-on oil filter and the filter mount as set out in the appended claims.

Thus, the above mentioned object of providing an improved oil filter arrangement comprising a spin-on oil filter and a filter mount is achieved for an oil filter arrangement where the filter mount comprises at least one oil drainage opening arranged, in the operating position, sealed off from the interior of the oil filter by the at least one primary gasket and arranged, in the operation position and in a draining position, sealed off from the ambient atmosphere by at least one secondary gasket, and arranged, in the draining position, in fluid connection with the interior of the oil filter, the oil filter of the oil filter arrangement thus being able to be drained faster before replacement. If the primary gasket begins to leak in the operating position, the leaking oil will be directed back to the oil reservoir via the return opening by that the secondary gasket prevents leaks to the ambient atmosphere. Thus, a further advantage is achieved by that the engine is prevented from being emptied of oil. Further, the objects of providing an engine comprising a filter arrangement and to a vehicle comprising a filter arrangement are achieved for an engine and a vehicle and a method, comprising an inventive oil filter arrangement as mentioned above, and a spin-on filter for an oil filter arrangement. According to one embodiment, an oil filter arrangement comprising a spin-on filter and a filter mount is provided. When the spin-on filter is mounted on the filter mount in an operating position, at least one primary gasket is arranged to provide a fluid tight seal between the filter mount and the spin-on filter housing. Further, at least one oil inlet opening is arranged on the spin-on filter be in fluid connection with at least one oil source opening arranged on the filter mount and at least one oil outlet opening is arranged on the spin-on filter to be in fluid connection with at least one oil distribution opening arranged on the filter mount. In the arrangement the filter mount comprises at least one oil drainage opening arranged, in the operating position, sealed off from the interior of the oil filter by the at least one primary gasket and arranged, in the operation position and in a draining position sealed off from the ambient atmosphere by at least one secondary gasket, and is further arranged, in the draining position, in fluid connection with the interior of the oil filter.

According to one embodiment, the oil filter arrangement comprising a spin-on filter and a filter mount comprises at least one secondary gasket arranged integrated with the at least one primary gasket to one unit. According to one embodiment, the oil filter arrangement comprising a spin-on filter and a filter mount comprises at least one flexible secondary gasket.

According to one embodiment, the oil filter arrangement comprising a spin-on filter and a filter mount comprises at least one secondary gasket having a central inner opening having an inner diameter smaller than the outer diameter of the spin-on filter housing.

According to one embodiment, the oil filter arrangement comprising a spin-on filter and a filter mount comprises at least one secondary gasket arranged to be pressed against the filter mount while undergoing flexible deformation when the spin-on filter is in an operating position or in a draining position.

In accordance with some embodiments a spin-on filter comprising a spin-on filter housing that rotationally symmetrical around a central axis of the filter housing is provided. The spin-on filter further comprises at least one primary gasket, at least one oil inlet opening, and at least one oil outlet opening. The spin-on filter has at least one secondary gasket provided displaced in at least one of a radial direction and an axial direction from the primary gasket.

In accordance with some embodiments, the primary gasket and secondary gasket are integrated and forms one unit. In accordance with some embodiments, the primary gasket and secondary gasket are separate from each other.

In accordance with some embodiments, the primary gasket is attached to a bottom side of the spin-on filter housing. In accordance with some embodiments, the primary gasket is attached to an outer side of the spin-on filter housing.

In accordance with some embodiments, the secondary gasket comprises a curved portion and is attached to both the bottom side and the outer side of the spin-on filter housing.

In accordance with some embodiments, a spin-on filter mount is provided. The spin-on filter mount can comprise at least one oil source opening and at least one oil distribution opening, and further comprise a spin-on-filter attachment member. The spin-on filter mount further can comprise at least one oil drainage opening located radially outside said at least one oil source opening and said at least one oil distribution opening. Hereby it is possible to disengage a spin-on filter with a secondary gasket with no or reduced oil leakage.

In accordance with some embodiments the spin-on- filter attachment member are threads formed in the spin-on-filter mount.

In accordance with some embodiments, the at least one oil drainage opening is located in a top portion and with the opening thereof in the same direction as the at least one oil source opening and at least one oil distribution opening. In accordance with some embodiments the at least one oil drainage opening is located in a an outer side wall of the spin-on mount and with the opening thereof axially displaced from the at least one oil source opening and at least one oil distribution opening .

Further 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 devices according to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure la shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to a first embodiment of the invention in an operating position,

Figure lb shows schematically a view of a spin-on filter according to a first embodiment,

Figure 2 shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to figure la in a draining position,

Figure 3 a shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to a second embodiment of the invention, Figure 3 b shows schematically a view of a spin-on filter according to a second embodiment,

Figure 4 shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to figure 3 a in a draining position,

Figure 5a shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to a third embodiment of the invention, Figure 5b shows schematically a view of a spin-on filter according to a third embodiment,

Figure 6 shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to figure 5a in a draining position, Figure 7a shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to a fourth embodiment of the invention,

Figure 7b shows schematically a view of a spin-on filter according to a fourth embodiment. Figure 8 shows schematically a cross-section of an oil filter arrangement comprising a spin-on filter and a filter mount according to figure 7a in a draining position, and

Figure 9 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 an oil filter arrangement comprising a spin-on filter and a filter mount.

DESCRIPTION OF PREFERRED EMBODIMENTS

The same reference numerals are being used for similar features in the different drawings. Figure la shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to a first embodiment of the invention in an operating position A and arranged on a device to which the spin-on filter 4 is to be attached during operation of the system containing the fluid 8 to be filtered by the spin-on filter 4, where the spin- on filter 4 comprises a spin-on filter housing 10, the latter comprising a filter body 12 defining a mouth 14 and further possibly comprising a cover 16, where the spin-on filter 4 further comprises a filter element 18 disposed in the spin-on filter housing 10. The spin-on filter 4 is typically generally cylindrical and can be rotated around a central axis (the dashed line in Fig. la). The spin-on filter 4 is mounted on the corresponding filter mount 6 during operation, in this embodiment by that the spin-on filter 4 comprises an internal thread 20, arranged to be brought into engagement with a corresponding external thread 22 on the filter mount 6 by rotation of the spin-on filter 4 around the axis of the spin on filter 4.

In this embodiment, the cover 16 comprises at least one inlet opening and at least one outlet opening for the fluid 8 to be filtered by the spin-on filter 4, but it is possible to arrange some or all of these openings on the filter body 12 instead if the mouth 14 is of such narrow dimensions that a cover 16 is not present. In this embodiment, the central opening is the outlet opening 24 of the spin-on filter 4, and a number of inlet openings 26, 28 are arranged in the cover 16 radially r outside of the central opening 24 in the cover 16.

In operation, when fluid 8 is carried through the spin-on filter 4, the fluid 8 is usually under a pressure higher than the ambient pressure P outside E of the filter mount 6 and the spin-on filter 4. The above corresponding threads 20, 22 of the spin-on filter 4 and the filter mount 6 together form a seal preventing fluid from passing therethrough, thus forcing all of the fluid 8 flowing (see dashed arrows in figure 1) through the spin-on filter 4 to pass through the filter element 18. At least one primary gasket 30 is arranged between the spin-on filter housing 10 and the filter mount 6 in order to prevent fluid 8 from leaking out therebetween during operation. The primary gasket 30 is preferably fastened to the spin-on filter 4, preferably already at manufacture, and the spin- on filter 4 is then surrounded by a wrapping (not shown) thus allowing for keeping it clean until the wrapping is removed just prior to the mounting of the spin-on filter 4 to the filter mount 6, to facilitate ease of mounting. The primary gasket 30 could optionally be arranged separate from the spin-on filter 4. In this embodiment, the surface 32 on the primary gasket 30 which surface 32 is arranged to abut against a primary gasket contact surface 34 on the filter mount 6 is preferably "moistened" by oil prior to the mounting to further enhance the sealing properties of the primary gasket 30.

A spin-on filter 4 may comprise one primary gasket 30 or multiple, preferably coaxially arranged, primary gaskets. Here is shown one primary gasket 30 only which in case of multiple primary gaskets is to be interpreted to represent all primary gaskets 30. The primary gasket 30 is in this embodiment shown arranged axially X on the spin-on filter 4, but could also in another embodiment be arranged radially r on the spin-on filter (see e.g. the embodiment shown in figures 7-8).

The oil filter arrangement 2 comprises a spin-on filter 4 and a filter mount 6, where, when the spin-on filter 4 is mounted on the filter mount 6 in an operating position A (the position schematically shown in figure 1) where at least one primary gasket 30 is arranged to provide a fluid tight seal between the filter mount 6 and the spin-on filter housing 10, at least one oil inlet opening 26, 28 arranged on the spin-on filter 4 is arranged to be in fluid connection with at least one oil source opening 36, 38 arranged on the filter mount 6 and at least one oil outlet opening 24 arranged on the spin-on filter 4 is arranged to be in fluid connection with at least one oil distribution opening 40 arranged on the filter mount 6, where the filter mount 6 further comprises at least one oil drainage opening 42 arranged, in the operating position A, sealed off from the interior 44 of the oil filter 4 by the at least one primary gasket 30 and arranged, in the operation position A and in a draining position (see figure 2), sealed off from the ambient atmosphere 46 by at least one secondary gasket 48, and arranged, in the draining position (see figure 2) in fluid connection with the interior 44 of the oil filter 4. By this design, the oil 8 in the interior 44 of the oil filter 4 of the oil filter arrangement 2 can thus be drained through the drainage opening 42 in the filter mount 6 to such a degree that the oil spill from the oil filter 4 is minimized when the oil filter 4 is disengaged from the filter mount 6, this regardless of in which space orientation (with the openings 24, 26, 28 in the oil filter 4 facing upwards, or downwards or at some position therebetween) the oil filter 4 is positioned when mounted on the filter mount 6 at the time the oil filter 4 is to be removed from the filter mount 6. This is achieved by firstly turning the oil filter 4 from the operating position A to a draining position B, thereafter waiting for oil to flow out from the interior 44 of the oil filter 4 in the draining position B, and finally turning the oil filter 4 from the draining position B until the oil filter 4 is disengaged from the filter mount 6.

In this embodiment, the at least one secondary gasket 48 is arranged to the spin-on filter 4 in a manner of a "ring". The at least one secondary gasket 48 is preferably, at least somewhat, flexible. The preferred flexibility of the at least one secondary gasket 48 allows for press and seal against a surface 50 of the filter mount 6 when the at least one secondary gasket 48 arranged on the filter housing 10 is pressed against the filter mount 6 while undergoing some flexible deformation. The at least one secondary gasket 48 is preferably arranged to be pressed against the filter mount 6 while undergoing flexible deformation when the spin-on filter 2 is in the operating position A or in the draining position B.

In this embodiment, the at least one secondary gasket 48 is integrated with the at least one primary gasket 30 to one unit, the parts of which unit can be of the same material or differing materials depending e.g. on the flexibility and other properties desired for the different parts thereof.

In Figure lb a view from the side of the spin-on filter 4 of Fig. la is shown. As is seen in Fig lb, the cover 16 may e.g. be a substantially circular ringshaped object arranged outside of and about the filter element 18 as shown in the figure, but other suitable shapes, such as e.g. the commonly used circular wave-shape (not shown), are also possible for the cover 16. The secondary gasket 48, here integrated with the primary gasket 30, is arranged radially outside the primary gasket 30. The secondary gasket 48 can be generally rotationally symmetrical. The secondary gasket 48 provides a sealing between the spin-on filter and the filter mount 6. In this embodiment the primary gasket 30 and secondary gasket 48 are located with essentially no axial displacement on the spin-on filter. The primary gasket 30 is arranged to provide a sealing to the top part of the filter mount 6 in an axial direction of the spin-on filter. The secondary gasket 48 is arranged to provide a sealing to the inner lateral of an outer wall 50 of the filter mount 6 to prevent oil leakage during mounting of the spin-on filter 4.

Figure 2 shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to figure 1 in a draining position B. As can be seen in the figure when comparing with figure 1, when the spin-on filter 4 is mounted on the filter mount 6 in an operating position (see figure 1) where at least one primary gasket 30 is arranged to provide a fluid tight seal between the filter mount 6 and the spin-on filter housing 10, where at least one oil inlet opening 26, 28 arranged on the spin-on filter 4 is arranged to be in fluid connection with at least one oil source opening 36, 38 arranged on the filter mount 6 and at least one oil outlet opening 24 arranged on the spin-on filter 4 is arranged to be in fluid connection with at least one oil distribution opening 40 arranged on the filter mount 6, where the filter mount 6 further comprises at least one oil drainage opening 42 arranged, in the operating position (see figure 1), sealed off from the interior 44 of the oil filter 4 by the at least one primary gasket 30 and arranged, in the operation position (see figure 1) and in a draining position (a position schematically shown in figure 2), sealed off from the ambient atmosphere 46 by at least one secondary gasket 48, and arranged, in the draining position (a position schematically shown in figure 2) in fluid connection with the interior 44 of the oil filter 4.

Figure 3 a shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to a second embodiment of the invention in an operating position A. This embodiment differs from the one shown in figure la in that the at least one secondary gasket 48 is arranged "bowl shaped".

In Figure 3b the spin-on filter is seen from the side. As is seen in Figure 3a and 3b, the secondary gasket 48 is formed to follow the outer side of the filter housing for a distance thereof and comprising a outer lip provided radially outside of the portion following the outer side of the filter housing for closing a gap between the filter housing 10 and the filter mount 6 during mounting of the spin-on filter 4. As is seen in Figure 3b, the secondary gasket 48, here integrated with the primary gasket 30, is arranged radially outside the primary gasket 30. The secondary gasket 48 comprises a curved portion arranged to follow the lower part of the outer side of the spin-on filter. The secondary gasket also comprises a lip arranged in a radial direction from the curved portion to contact the surface 50 of the filter mount 6. The secondary gasket 48 thereby provides a sealing between the spin-on filter and the filter mount 6. In this embodiment the primary gasket 30 and secondary gasket 48 are located with some axial displacement on the spin- on filter. The primary gasket 30 is arranged to provide a sealing to the top part of the filter mount 6 in an axial direction of the spin-on filter. The secondary gasket 48 is arranged to provide a sealing to the inner lateral of an outer wall 50 of the filter mount 6 at some axial distance from the primary gasket 30 to prevent oil leakage during mounting of the spin-on filter 4.

Figure 4 shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to figure 3 in a draining position B.

Figure 5a shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to a third embodiment of the invention in an operating position A. This embodiment differs from the one shown in figure 1 in that the at least one secondary gasket 48 is arranged separate from the at least one primary gasket 30, i.e. they are separate units, the parts of which units can be of the same material or differing materials depending e.g. on the flexibility and other properties desired for the different parts thereof.

In this embodiment, the at least one secondary gasket 48 preferably has a central inner opening 52 having an inner diameter, at least somewhat, smaller than the outer diameter of the spin-on filter housing 10, the rim of the inner opening 52 of the at least one secondary gasket 48 thus being pressed against the outer surface of the spin -on filter housing 10 thus effecting an effective seal between the secondary gasket 48 and the outer surface of the spin-on filter housing 10.

In Figure 5b the spin-on filter is seen from the side. As is seen in Figure 5 a and 5b, the secondary gasket 48 is formed as a separate gasket, separate from the primary gasket 30. As is seen in Fig 5b, the secondary gasket 48, is arranged radially outside the primary gasket 30. The secondary gasket 48 is generally formed by a lip arranged in a radial direction to contact the surface 50 of the filter mount 6. The secondary gasket 48 thereby provides a sealing between the spin-on filter 4 and the filter mount 6. In this embodiment the primary gasket 30 and secondary gasket 48 are located with some axial displacement on the spin-on filter. The primary gasket 30 is arranged to provide a sealing to the top part of the filter mount 6 in an axial direction of the spin-on filter. The secondary gasket 48 is arranged to provide a sealing to the inner lateral of an outer wall 50 of the filter mount 6 at some axial distance from the primary gasket 30 to prevent oil leakage during mounting of the spin-on filter 4.

Figure 6 shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to figure 5 in a draining position B.

Figure 7a shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to a fourth embodiment of the invention in an operating position A. This embodiment differs from the one shown in figure 5a in that the at least one primary gasket 30 is arranged radially r, not axially X, on the spin-on filter 4, and in that the at least one oil drainage opening 42 is arranged radially r, not axially X, on the filter mount 6.

In Figure 7b the spin-on filter is seen from the side. As is seen in Figure 7a and 7b, the secondary gasket 48 is formed as a separate gasket, separate from the primary gasket 30. As is seen in Figure 7b, the primary gasket 30 is arranged in a lateral direction to provide a sealing between the outer side of the spin-on filter housing and a first part of a filter mount surface. The secondary gasket 48 is arranged axially displaced in relation to the primary gasket 30. The primary gasket 30 and secondary gasket 48 are generally formed by lips arranged on the outer surface of the spin-on filter housing and extending in a radial direction to contact different portions of the surface 50 of the filter mount 6. The primary gasket 30 is arranged to provide a sealing to the inner lateral of an outer wall 50 of the filter mount 6. The secondary gasket 48 is arranged to provide a sealing to the inner lateral of an outer wall 50 of the filter mount 6 at some axial distance from the primary gasket 30 to prevent oil leakage during mounting of the spin-on filter 4. Figure 8 shows schematically a cross-section of an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to figure 7 in a draining position B.

Figure 9 shows a view of a chassis for a vehicle 54, e.g. a commercial vehicle, e.g. a truck or a bus, comprising an engine 56, comprising an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6, e.g. by that the engine 56 or some other part of the vehicle 54 such as e.g. a gear box or an axle, etc., comprises an oil filter arrangement 2 comprising a spin-on filter 4 and a filter mount 6 according to one embodiment mentioned above. The body of the vehicle 54 is not shown for reasons of clarity regarding the examples of possible uses of the oil filter arrangement 2. The invention thus also relates to a vehicle 54 comprising oil filter arrangement 2 and an engine 56 comprising oil filter arrangement 2.

Referring to Figures 1-8:

In the operation position A and in a draining position B of the oil filter arrangement 2, the at least one oil drainage opening 42 is arranged radially r outside of the oil inlet and oil outlet openings 26, 28; 24, the secondary gasket 48 is arranged radially outside of the primary gasket 30, and the secondary gasket 48 is arranged between the filter housing 10 and the filter mount 6.

The primary 30 and secondary 48 gaskets may be mounted on the filter 4 at manufacture of the filter, i.e. the filter 4 may comprise the primary 30 and secondary 48 gaskets. Referring now to figures 1-8, the invention thus also relates to a spin-on filter 4 for an oil filter arrangement 2, the oil filter arrangement 2 comprising a filter mount 6 on which the spin-on filter 4 is arranged to be mounted, the spin -on filter 4 comprising a spin-on filter housing 10 and further comprising at least one primary gasket 30 which is arranged to provide a fluid tight seal between the filter mount 6 and the spin-on filter housing 10 when the spin-on filter 4 is mounted on the filter mount 6 in an operating position A, the spin-on filter 4 further comprising at least one oil inlet opening 26, 28 arranged to be in fluid connection with at least one oil source opening 36, 38 arranged on the filter mount 6 and at least one oil outlet opening 24 arranged to be in fluid connection with at least one oil distribution opening 40 arranged on the filter mount 6 when the spin-on filter 4 is mounted on the filter mount 6 in the operating position A, where the at least one primary gasket 30 is arranged, in the operating position A, to seal off at least one oil drainage opening 42 arranged in the filter mount 6 from the interior 44 of the oil filter 4, the spin-on filter 4 further comprising at least one secondary gasket 48 which, in the operation position A and in a draining position B, is arranged to seal off the at least one oil drainage opening 42 from the ambient atmosphere 46, and which, in the draining position B, further is arranged to enable fluid connection between the at least one oil drainage opening 42 and the interior 44 of the oil filter 4. The material for the secondary gasket 48 may e.g. be natural rubber, synthetic rubber, foamed rubber, metal, etc. other materials having the preferred flexibility. The secondary gasket 48 has to show some stiffness in order to maintain its desired shape, as it is exposed to pressures existing in e.g. an engine crankcase in normal use. The primary gasket 30 can e.g. be made of nitrile rubber, etc.

The secondary gasket 48 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. E.g., the secondary gasket 48 of figures 5-8 could be integrated with the primary gasket 30 to one unit as shown in figures 1-4.

Claims

CLAIMS:

1. Oil filter arrangement (2) comprising a spin-on filter (4) and a filter mount (6), where, when the spin-on filter (4) is mounted on the filter mount (6) in an operating position (A) where at least one primary gasket (30) is arranged to provide a fluid tight seal between the filter mount (6) and the spin-on filter housing (10), at least one oil inlet opening (26, 28) arranged on the spin-on filter (4) is arranged to be in fluid connection with at least one oil source opening (36, 38) arranged on the filter mount (6) and at least one oil outlet opening (24) arranged on the spin-on filter (4) is arranged to be in fluid connection with at least one oil distribution opening (40) arranged on the filter mount (6), characterized in, that the filter mount (6) further comprises at least one oil drainage opening (42), located radially outside said at least one oil source opening (36, 38) and said at least one oil distribution opening (40), arranged in the operating position (A), sealed off from the interior (44) of the oil filter (4) by the at least one primary gasket (30) and arranged, in the operation position (A) and in a draining position (B), sealed off from the ambient atmosphere (46) by at least one secondary gasket (48), and arranged, in the draining position (B), in fluid connection with the interior (44) of the oil filter

(4).

2. Oil filter arrangement according to claim 1, characterized in, that the at least one secondary gasket (48) is arranged integrated with the at least one primary gasket (30) to one unit.

3. Oil filter arrangement according to claim 1 or 2, characterized in, that the at least one

secondary gasket (48) is flexible.

4. Oil filter arrangement according to claim 3, characterized in, that least one secondary gasket (48) has a central inner opening (52) having an inner diameter smaller than the outer diameter of the spin-on filter housing (10).

5. Oil filter arrangement according to one of claims 1 to 4, characterized in, that the at least one secondary gasket (48) is arranged to be pressed against the filter mount (6) while undergoing flexible deformation when the spin-on filter (2) is in the operating position (A) or in the draining position (B).

6. Oil filter arrangement according to one of claims 1 to 5, characterized in, that the spin-on filter housing (10) comprises a filter body (12) defining a mouth (14), and that the spin-on filter (4) further comprises a filter element (18) disposed in the spin-on filter housing (10).

7. Oil filter arrangement according to one of claims 1 to 6, characterized in, that the spin-on filter housing (10) further comprises a cover (16).

8. Oil filter arrangement according to claim 7, characterized in, that the cover (16) comprises at least one inlet opening (26, 28) and at least one outlet opening (24) for the fluid (8) to be filtered by the spin-on filter (4).

9. Oil filter arrangement according to one of claims 1 to 8, characterized in, that the spin-on filter (4) is arranged to be mounted on the corresponding filter mount (6) by that the spin-on filter (4) comprises an internal thread (20) arranged to be brought into engagement with a corresponding external thread (22) on the filter mount (6).

10. Oil filter arrangement according to one of claims 1 to 9, characterized in, that the primary gasket (30) is arranged axially (X) or radially (r) on the spin-on filter (4).

11. Oil filter arrangement according to one of claims 1 to 10, characterized in, that the at least one oil drainage opening (42) is arranged radially (r) outside of the oil inlet and oil outlet openings (26, 28; 24) in the operation position (A) and in the draining position (B) of the oil filter arrangement (2).

12. Oil filter arrangement according to one of claims 1 to 11, characterized in, that the

secondary gasket (48) is arranged radially outside of the primary gasket (30) in the operation position (A) and in the draining position (B) of the oil filter arrangement (2).

13. Oil filter arrangement according to one of claims 1 to 12, characterized in, that and the secondary gasket 48 is arranged between the filter housing 10 and the filter mount 6 in the operation position (A) and in the draining position (B) of the oil filter arrangement (2).

14. Engine, characterized in, that it comprises an oil filter arrangement (2) according to one of claims 1 to 13.

15. Vehicle, characterized in, that it comprises an engine according to claim 14.

16. Spin-on filter (4) for an oil filter arrangement (2), the oil filter arrangement (2) comprising a filter mount (6) on which the spin-on filter (4) is arranged to be mounted, the spin-on filter (4) comprising a spin-on filter housing (10) and further comprising at least one primary gasket (30) which is arranged to provide a fluid tight seal between the filter mount (6) and the spin- on filter housing (10) when the spin-on filter (4) is mounted on the filter mount (6) in an operating position (A), the spin-on filter (4) further comprising at least one oil inlet opening (26, 28) arranged to be in fluid connection with at least one oil source opening (36, 38) arranged on the filter mount (6) and at least one oil outlet opening (24) arranged to be in fluid connection with at least one oil distribution opening (40) arranged on the filter mount (6) when the spin-on filter (4) is mounted on the filter mount (6) in the operating position (A), characterized in, that the at least one primary gasket (30) is arranged, in the operating position (A), to seal off at least one oil drainage opening (42) arranged in the filter mount (6) radially outside said at least one oil source opening (36, 38) and said at least one oil distribution opening (40), from the interior (44) of the oil filter (4), the spin-on filter (4) further comprising at least one secondary gasket (48) which, in the operation position (A) and in a draining position (B), is arranged to seal off the at least one oil drainage opening (42) from the ambient atmosphere (46), and which, in the draining position (B), further is arranged to enable fluid connection between the at least one oil drainage opening (42) and the interior (44) of the oil filter (4).