Filter device for filtering a fluid

Abstract

Oil or fuel filter device (10) for filtering fuel or oil of an internal combustion engine, comprising a connecting device (14) for connecting a functional component (12) to a filter housing (16), wherein the connecting device (14) comprises: - a guide section (18) of the functional component (12); - a guide section counterpart (20) of the filter housing (16) which can be joined with the guide section (18) in such a way that the guide section (18) is rotatable about an axis of rotation (28) relative to the guide section counterpart (20), wherein the guide section (18) is fixed radially to the axis of rotation (28) relative to the guide section counterpart (20); - a holding device (40) which has corresponding holding components (42, 44, 46) on the functional component (12) and on the filter housing (16) and which can be activated and deactivated by rotating the guide section (18) relative to the guide section counterpart (20) about the axis of rotation (28) and which, in the activated state, fixes the guide section (18) axially to the axis of rotation (28) relative to the guide section counterpart (20); - a snap-action device (50) which has corresponding snap-action components (52, 54) on the functional component (12) and on the filter housing (16) and which can be activated by rotating the guide section (18) about the axis of rotation (28) relative to the guide section counterpart (20) and which, in the activated state, fixes the guide section (18) circumferentially with respect to the axis of rotation (28) relative to the guide section counterpart (20), wherein the holding device (40) and the snap-action device (50) are activated or deactivated in the same rotational positions of the guide section (18) relative to the guide section counterpart (20), wherein the functional component (12) is a sensor, characterized in that the holding device (40) has at least one holding wing (42) extending radially and partially circumferentially with respect to the axis of rotation (28) and at least one holding hook (44, 46),which, in the activated state of the holding device (40), engages the holding wing (42) and fixes it axially to the axis of rotation (28), wherein the holding wing (42) can be rotated in and out of the holding area of ​​the holding hook (44, 46) by rotating the guide section (18) relative to the guide section counterpart (20), wherein the holding wing (42) is arranged on the functional component (12) and the holding hook (44, 46) is arranged on the filter housing (16).

Description

Technical field

[0001] The invention relates to an oil or fuel filter device for filtering fuel or oil from an internal combustion engine, comprising a connection device for connecting a functional component to a filter housing. The invention further relates to a functional component and a filter housing of such a filter device. State of the art

[0002] In commercially available fuel filtration systems, temperature sensors are inserted into corresponding receptacles in a filter housing and fixed to the filter housing using separate screws.

[0003] DE 296 08 406 U1 discloses a device for respiratory gas filtration comprising a housing with an interior containing a filter that divides the interior into an inlet chamber and an outlet chamber. The two-part housing design, with the upper part detachable from the lower part, allows for the use of a replaceable filter. The combination of a rim on the upper part with a rim on the lower part, along with opposing sealing lips, creates a labyrinthine structure that results in a high degree of sealing when the upper and lower parts are joined.

[0004] WO 2008 / 009 324 A1 relates to an oil filter assembly with a receiving chamber that can be closed with a cover element and with a spring-loaded support tube fixed in the receiving chamber for receiving a filter element through which oil flows radially, wherein the support tube is arranged to be displaceable in the axial direction between an operating position and a draining position such that, when the receiving chamber is closed with the cover element, it closes a draining opening in the operating position and, when the receiving chamber is open, it releases a draining opening in the draining position, the support tube is arranged to be rotatable about an angle of rotation limited by two housing-side rotation stops, wherein the cover element has drive sections that interact with the support tube and / or the filter element for rotating the support tube about the angle of rotation when the cover element is screwed on and / or off.

[0005] DE 103 58 148 describes a fastening element with a stop collar and an anchor projecting from it, with claws provided at its end for fastening to a component having a through-opening for receiving the fastening element anchor, wherein the distance between the stop collar and the claws is adapted to the thickness of the component in the edge area of ​​the through-opening, so that the edge of the through-opening can be clamped between the stop collar and the anchor claws of the fastening element when the fastening element is inserted.

[0006] In DE 198 04 549 A1, a fuel filter is proposed whose water storage chamber can be emptied via a remotely controlled water drain valve, this valve being mechanically actuated by a cable pull. The valve has a disc-shaped valve housing that is tightly and securely installed on the filter housing between its base and a water sensor, and to which the cable pull leads radially.

[0007] German patent application DE 101 52 257 A1 proposes a sensor module for determining a liquid level. The sensor module has a two-part housing, in which an outer housing part accommodates a cover part in such a way that a dry cavity is formed between the two for accommodating a circuit board, which is connected to electrodes and connector pins. While the housing part carries the electrical flat connector, the cover part has a threaded bolt protruding into the liquid with the poles and, radially offset from this, a drain channel.WO 01 / 96 731 A1 discloses a filter comprising a filter mass contained in a housing, designed so that it is traversed by the fuel on its way into the filter between an inlet connection and an outlet connection, and is provided with a means for separating the water contained in the diesel fuel, the housing being provided with a water collection container on its underside, and a remotely controlled valve being provided.

[0008] From EP 2 002 875 A1, a liquid filter is known which is preferably used for internal combustion engines, for example as an oil filter or as a fuel filter. The filter housing is connected to another component via a bayonet connection. The bayonet connection comprises at least one first positive locking element on the filter housing and at least one second positive locking element on the other component to which the filter housing is to be attached or which is to be attached to the filter housing. The bayonet connection is achieved by axial displacement and subsequent rotation about the longitudinal axis of the filter housing, whereby the positive locking elements are first axially slid past each other.

[0009] The invention is based on the objective of designing a filter device, a functional component and a filter housing of the type mentioned above in such a way that the functional component can be connected to the filter housing easily, preferably without separate components, quickly and reliably. Disclosure of the invention

[0010] This problem is solved according to the invention by the fact that the connecting device comprises: - a guide section of the functional component; - a guide section counterpart of the filter housing that can be joined with the guide section in such a way that the guide section is rotatable about an axis of rotation relative to the guide section counterpart, wherein the guide section is fixed radially to the axis of rotation relative to the guide section counterpart; - a holding device which has corresponding holding components on the functional component and on the filter housing and which can be activated by rotating the guide section relative to the guide section counterpart about the axis of rotation and which, in the activated state, fixes the guide section axially to the axis of rotation relative to the guide section counterpart; - a snap-fit ​​device which has corresponding snap components on the functional component and on the filter housing and which can be activated by rotating the guide section about the axis of rotation relative to the guide section counterpart and which, in the activated state, fixes the guide section in the circumferential direction with respect to the axis of rotation relative to the guide section counterpart, wherein the holding device and the snap-fit ​​device are activated or deactivated in the same rotational positions of the guide section relative to the guide section counterpart.

[0011] According to the invention, a rotary-snap mechanism is provided in which a detent position is assumed by rotating the guide section about the axis of rotation relative to the guide section counterpart. In this position, the guide section is fixed axially and circumferentially with respect to the axis of rotation relative to the guide section counterpart. The radial fixation is achieved by the guide section together with the guide section counterpart. All interacting components are connected to the functional component or the filter housing, so that no separate components, such as screws, are required. Activation of the holding device and the snap mechanism is accomplished in a single step simply by rotating the guide section relative to the guide section counterpart.The retaining components and the snap-in components are separate parts, each optimally designed for its specific function: holding or locking. The retaining components can be rigid and optimized for high tensile forces axially to the axis of rotation. The snap-in components, on the other hand, can interact flexibly when the snap mechanism is activated to facilitate locking. Advantageously, the snap mechanism can be designed to be deactivated, allowing the connection to be released. In the deactivated state, the retaining component can release the guide section axially. Deactivation may preferably require a separate tool. However, the functional component can also be designed as a permanent component that remains attached to the filter device for its entire service life, so that the connection typically does not need to be released.The snap-fit ​​mechanism can then be designed so that it can only be deactivated with considerable effort, thus increasing the reliability of the connection. The retaining components and the snap-fit ​​components can advantageously be made of the same material as the functional component or the filter housing to avoid differences in thermal expansion. Advantageously, the retaining components and the snap-fit ​​components can each be integrally molded onto the functional component or the filter housing.

[0012] In an advantageous embodiment, the guide section of the functional component can be inserted axially to the axis of rotation into the guide section counterpart of the filter housing for assembly. During insertion, an outer circumferential surface of the guide section can slide along an inner circumferential surface of the guide section counterpart, thus guiding the guide section. In the assembled state, the guide section can be protected and stably housed in the guide section counterpart.

[0013] In the embodiment according to the invention, the holding device comprises at least one holding wing extending radially and partially circumferentially with respect to the axis of rotation and at least one holding hook which, in the activated state of the holding device, can engage the holding wing and fix it axially with respect to the axis of rotation, wherein the holding wing can be rotated in and out of the holding area of ​​the holding hook by rotating the guide section relative to the counterpart of the guide section. The interaction of the holding wing with the holding hook enables simple and stable axial fixation. To activate the holding device, the holding wing can be easily pivoted into the holding area of ​​the holding hook without requiring significant force.

[0014] According to the invention, the retaining wing is arranged on the functional component and the retaining hook on the filter housing. This allows for a compact design of the functional component and the filter housing, which has a particularly positive effect on manufacturing, packaging and storage.

[0015] In a further advantageous embodiment, the snap mechanism can have at least one snap spring element, in particular a spring arm extending axially to the axis of rotation, and a locking element, in particular a locking lug, with which the snap spring element locks in the activated state of the snap mechanism. The locking element can be designed such that it provides mechanical resistance to the snap spring element for activating the snap mechanism, which the snap spring element can overcome by means of elastic deformation. To minimize the forces on the snap mechanism and the material stress, the snap spring element can advantageously be relaxed in both the activated and deactivated states.Advantageously, the snap spring element can be inelastic in the circumferential direction to the axis of rotation in order to prevent rotation of the guide section relative to the axis of rotation in the circumferential direction relative to the guide section counterpart.

[0016] Advantageously, the snap spring element can be located on the functional component and the locking mechanism on the filter housing. This offers manufacturing advantages.

[0017] Furthermore, the locking element can have a guide section, in particular a ramp, which guides the snap spring element during the transition from the deactivation state to the activation state. The guide section simplifies the activation of the snap mechanism by guiding the snap spring element into its activation position and supporting the elastic deformation of the snap spring element. Conversely, the asymmetrical locking element prevents the snap mechanism from unintentionally deactivating.

[0018] According to the invention, the functional component is a sensor, in particular a temperature sensor, a pressure sensor, or a fluid level sensor, or a shut-off and / or throttling device for fluid, in particular a valve or a fluid drain or fluid inlet closure. Such functional components can generally be manufactured separately from the filter housing, since they can contain electrical and / or mechanical components, in particular springs, which can also be encapsulated. The invention enables simple, quick, and reliable mounting of such functional components to the filter housing. A secured drain plug can also be connected to the filter housing using the invention. Brief description of the drawings

[0019] Further advantages, features, and details of the invention will become apparent from the following description, in which an embodiment of the invention is explained in more detail with reference to the drawing. The person skilled in the art will expediently consider the features disclosed in the drawing, the description, and the claims individually and combine them into meaningful further combinations. The drawing shows... Fig. 1 schematically a front view of a fuel filter assembly of an internal combustion engine with a temperature sensor connected to a filter housing by a connecting device; Fig. 2. Schematic isometric detail view of the fuel filter assembly from the Fig. 1 in the area of ​​the temperature sensor; Fig. 3 schematically a cross-section of the fuel filter assembly from the Fig. 1 and Fig. 2 in the area of ​​the temperature sensor; Fig. 4. Schematic representation of the temperature sensor in isometric view. Fig. 1, Fig. 2 to Fig. 3. embodiment of the invention

[0020] In Fig. Figure 1 shows a fuel filter assembly of an internal combustion engine, designated as reference numeral 10. A temperature sensor 12 is connected to a filter housing 16 of the fuel filter assembly 10 by means of a connecting device designated as 14.

[0021] The temperature sensor 12, which is located in the Fig. 3 and Fig. As shown in detail in section 4, the content is contained within the Fig. 1, Fig. 2 to Fig. Figure 3 shows the installation state with a guide section 18 in a guide section counterpart 20 of the filter housing 16. The guide section 18 and the guide section counterpart 20 are part of the connecting device 14. On the free end face of the guide section 18, a Fig. 3 and Fig. 4 sensor element 24 shown, which is thermally connected to the interior of the filter housing 16 for the purpose of detecting the fuel temperature.

[0022] A connection section 26 of the temperature sensor housing 22, which is located outside the filter housing 16 when installed, has a socket-like connection for an electrical plug (not shown) for electrical leads. The electrical leads are connected to an electronic control unit (not shown).

[0023] The command section 18 has, as in the Fig. 3 and Fig. Figure 4 shows the shape of a cylinder stepped in the axial direction. The radially outer circumferential surfaces 27 of the guide section 18 are shaped around a [missing information - likely a specific feature or feature]. Fig. 3 indicated axis of rotation 28 rotationally symmetrical. A section (18a) adjacent to the free end face of the guide section 18. Fig. 4) smaller diameter has a circumferential sealing groove 30 with an O-ring seal 32, which is located in the Fig. 3 and Fig. Figure 4 shows that, with the temperature sensor 12 installed, the O-ring seal 32 rests with its radially outer side against a radially inner circumferential surface 34 of the guide section counterpart 20, sealing against it.

[0024] The counterpart to the guide section 20 has, as in the Fig. 1, Fig. 2 to Fig. Figure 3 shows approximately the shape of a hollow cylinder, rotationally symmetrical about the axis of rotation 28 and open at both ends, whose inner surface is stepped according to the radially outer circumferential surfaces 27 of the guide section 18. In the installed state, the radially inner circumferential surfaces 34 of the guide section counterpart 20 abut the radially outer circumferential surfaces 27 of the guide section 18. The axial extent of the radially inner circumferential surfaces 34 of the guide section counterpart 20 corresponds to the axial extent of the radially outer circumferential surfaces 27 of the guide section 18. In the installed state, the guide section 18 is completely enclosed in the guide section counterpart 20 without projecting in the axial direction.

[0025] The guide section counterpart 20 is embedded in a dome-shaped wall 36 of the filter housing 16, such that, when the temperature sensor 12 is not inserted, the interior of the guide section counterpart 20 connects the interior of the filter housing 16 to the environment. A radially outer circumferential surface 38 of the guide section counterpart 20 is accessible from the outside over a large portion of its circumference in the region of its end face facing the environment. This is achieved by the fact that the axis of rotation 28 is inclined to the curved surface of the dome-shaped wall 36.

[0026] A holding device, designated 40, for the connecting device 14 has two holding wings 42 on the temperature sensor housing 22, which correspond to two holding hooks 44 and 46 on the filter housing 16. The holding device 40 can be activated and deactivated by rotating the guide section 18 relative to the guide section counterpart 20 about the axis of rotation 28. In the activated state, the holding device 40 fixes the guide section 18 axially to the axis of rotation 28 relative to the guide section counterpart 20. In the deactivated state, the holding device 40 releases the guide section 18 in the axial direction.

[0027] The retaining wings 42 are arranged axially behind the guide section 18 on an outer circumferential surface 48 of the temperature sensor housing 22, viewed from the end face facing the interior of the filter housing 16. They extend partially circumferentially and radially with respect to the axis of rotation 28. In the axial direction, the retaining wings 42 form the insertion limit of the temperature sensor housing 22 into the guide section counterpart 20. In the installed state, they rest against the ambient end face of the guide section counterpart 20, thus also preventing the temperature sensor 12 from being inserted too far into the guide section counterpart 20.

[0028] The first retaining hook 44 is integrally formed on the outer circumferential surface 38 of the guide section counterpart 20, i.e., on the filter housing 16. It projects beyond the surrounding end face of the guide section counterpart 20 in the axial direction of the axis of rotation 28. The second retaining hook 46 is integrally formed on the side of the axis of rotation 28 opposite the first retaining hook 44, directly on the filter housing 16. In the activated state of the holding device 40, the retaining hooks 44 and 46 each radially engage one of the retaining wings 42 from the outside and fix it axially to the axis of rotation 28. The retaining hooks 44 and 46 are open circumferentially with respect to the axis of rotation 28, so that the retaining wings 42 can be rotated in and out of the holding areas of the retaining hooks 44 and 46 by rotating the guide section 18 relative to the guide section counterpart 20.

[0029] A total of 50 designated, in which Fig. The snap-fit ​​device 50 of the connecting device 14 shown in Figure 2 has a snap spring element 52 (in particular, a snap spring arm) on the temperature sensor housing 22, which corresponds to a locking lug 54 on the filter housing 16. The snap-fit ​​device 50 can be activated by rotating the guide section 18 about the axis of rotation 28 relative to the guide section counterpart 20. In the activated state, the snap-fit ​​device 50 fixes the guide section 18 circumferentially with respect to the axis of rotation 28 relative to the guide section counterpart 20. The holding device 40 and the snap-fit ​​device 50 are activated or deactivated in the same rotational positions of the guide section 18 relative to the guide section counterpart 20.

[0030] The snap spring element 52 is integrally formed at one end on the outer circumferential surface 48 of the temperature sensor housing 22 in the circumferential direction between the retaining wings 42, in the area of ​​the insertion limit of the guide section 18 described above. Following a 90-degree bend, the snap spring element 52 extends parallel to the axis of rotation 28 towards the free end of the guide section 18 to approximately the level of the sealing groove 30 ( Fig.4) The radial distance of the snap spring element 52 to the outer circumferential surface 27 of the guide section 18 with the larger circumference is slightly greater than the smallest radial dimension of the guide section counterpart 20, so that the snap spring element 52 bears against the radially outer circumferential surface 38 of the guide section counterpart 20, while the outer circumferential surfaces 27 of the guide section 18 bear against the radially inner circumferential surfaces 34 of the guide section counterpart 20. The side of the snap spring element 52 facing the outer circumferential surface 27 of the guide section 18 is bent in a manner complementary to the radially outer circumferential surface 38 of the guide section counterpart 20, so that it bears against the latter in a flat and stable manner when installed. The snap spring element 52 has a reinforcing rib 56 on its side facing away from the outer circumferential surface 27 of the guide section 18.

[0031] The circumferential extent of the snap spring element 52 with respect to the axis of rotation 28 corresponds to the distance between the locking lug 54 and the second retaining hook 46. In the activated state of the snap device 50, the snap spring element 52 engages between the locking lug 54 and the retaining hook 46.

[0032] The locking lug 54 is formed on the radially outer circumferential surface 38 of the guide section counterpart 20 in the circumferential direction between the two retaining hooks 44 and 46. The locking lug 54 is wedge-shaped on its side facing the first retaining hook 44 and 46, and thus asymmetrically shaped overall. A ramp 58 thus formed serves as a guide section for guiding the snap spring element 52 during the transition from the deactivation state to the activation state.

[0033] One of the flat sides 60 of the locking lug 54 opposite the inclined side 58 extends radially and axially to the axis of rotation 28.

[0034] For assembly, the temperature sensor 12 is inserted into the guide section 20 in direction “A” parallel to the axis of rotation 28 with the guide section 18 leading, until the retaining wings 42 abut the outer end face of the guide section 20. To achieve this, the temperature sensor 12 is aligned relative to the guide section 20 so that the snap spring element 52 engages in the free space between the locking lug 54 and the first retaining hook 44, and the retaining wings 42 are positioned in the free space between the retaining hooks 44. The guide section 18 is rotatable about the axis of rotation 28 relative to the guide section 20 and fixed radially to the axis of rotation 28 relative to the guide section 20.

[0035] To activate the holding device 40 and the snap-in device 50, the temperature sensor 12 is rotated counterclockwise around the axis of rotation 28 relative to the guide section counterpart 20. During this rotation, the holding wings 42 engage in the holding areas of the retaining hooks 44 and 46. Simultaneously, the snap spring element 52 is tensioned radially outwards by means of the chamfer 58 of the locking lug 54. The mechanical resistance to be overcome is perceptible. In the activated state, the snap spring element 52 engages in a relaxed position between the locking lug 54 and the holding hook 46, thus fixing the temperature sensor 12 circumferentially.

[0036] A separate tool is required to deactivate the holding device 40 and the snap-in device 50. This tool lifts the snap spring element 52 radially over the detent lug 54, allowing the temperature sensor 12 to rotate clockwise. In the deactivated state, the temperature sensor 12 can be pulled axially relative to the axis of rotation 28 out of the guide section counterpart 20.

[0037] In the above-described embodiment of a filter device 10, the following modifications are possible, among others:

[0038] The invention is not limited to a fuel filter device 10; rather, it can also be used in other types of filter devices for filtering a fluid, for example oil, air or water, in particular an internal combustion engine.

[0039] Instead of the temperature sensor 12 or additionally, at least one other type of functional component, for example a pressure sensor or a fluid level sensor, or a shut-off and / or throttling device for fluid, for example a valve or a fluid drain or fluid inlet closure body, can be detachably connected to the filter housing 16 with a connection device similar to the connection device 14.

[0040] The guide section 18 and the guide section counterpart 20 can also be designed so that the guide section 18 can be placed on the guide section counterpart 20 instead of inside the guide section counterpart 20.

[0041] It is also possible to provide more or fewer than two retaining wings 42 and retaining hooks 44, 46.

[0042] The retaining wings 42 can be arranged on the filter housing 16 instead of on the temperature sensor 12. The corresponding retaining hooks 44 and 46 are then attached to the temperature sensor 12. It is also possible to combine both variants.

[0043] More than one snap spring element 52 with locking lug 54 can also be used, which are arranged, for example, on radially opposite circumferential sides of the guide section 18 and the guide section counterpart 20.

[0044] The snap spring element 52 can be arranged on the filter housing 16 instead of on the temperature sensor 12. The corresponding locking lug 54 is then arranged on the temperature sensor 12. It is also possible to combine both variants.

[0045] Instead of the snap spring element 52 (in particular snap spring arm), a different type of snap spring element can also be used.

[0046] Likewise, instead of the locking lug 54, a different locking element, for example a recess, may be provided.

[0047] The inclined section 58 of the locking lug 54 can also be designed differently. The inclined section 58 can also be curved.

Claims

[1] Oil or fuel filter device (10) for filtering fuel or oil of an internal combustion engine, comprising a connecting device (14) for connecting a functional component (12) to a filter housing (16), wherein the connecting device (14) comprises: - a guide section (18) of the functional component (12); - a guide section counterpart (20) of the filter housing (16) which can be joined with the guide section (18) in such a way that the guide section (18) is rotatable about an axis of rotation (28) relative to the guide section counterpart (20), wherein the guide section (18) is fixed radially to the axis of rotation (28) relative to the guide section counterpart (20); - a holding device (40) which has corresponding holding components (42, 44, 46) on the functional component (12) and on the filter housing (16) and which can be activated and deactivated by rotating the guide section (18) relative to the guide section counterpart (20) about the axis of rotation (28) and which, in the activated state, fixes the guide section (18) axially to the axis of rotation (28) relative to the guide section counterpart (20); - a snap-action device (50) which has corresponding snap-action components (52, 54) on the functional component (12) and on the filter housing (16) and which can be activated by rotating the guide section (18) about the axis of rotation (28) relative to the guide section counterpart (20) and which, in the activated state, fixes the guide section (18) circumferentially with respect to the axis of rotation (28) relative to the guide section counterpart (20), wherein the holding device (40) and the snap-action device (50) are activated or deactivated in the same rotational positions of the guide section (18) relative to the guide section counterpart (20), wherein the functional component (12) is a sensor, characterized by, that the holding device (40) has at least one holding wing (42) extending radially and partially circumferentially with respect to the axis of rotation (28) and at least one holding hook (44, 46) which, in the activated state of the holding device (40), engages the holding wing (42) and fixes it axially to the axis of rotation (28), wherein the holding wing (42) can be rotated in and out of the holding area of ​​the holding hook (44, 46) by rotating the guide section (18) relative to the guide section counterpart (20), wherein the holding wing (42) is arranged on the functional component (12) and the holding hook (44, 46) is arranged on the filter housing (16). [2] Filter device according to claim 1, characterized by , that the guide section (18) of the functional component (12) can be inserted axially to the axis of rotation (28) into the guide section counterpart (20) of the filter housing (16) for assembly. [3] Filter device according to any of the preceding claims, characterized by, that the snapping device (50) has at least one snap spring element (52), in particular a spring arm which extends axially to the axis of rotation (28), and a locking means, in particular a locking lug (54), with which the snap spring element (52) locks in the activated state of the snapping device (50). [4] Filter device according to claim 3, characterized by , that the snap spring element (52) is located on the sensor (12) and the locking means (54) is located on the filter housing (16). [5] Filter device according to claim 3 or 4, characterized by , that the locking means (54) has a guide section, in particular an inclined section (58), with which the snap spring element (52) can be guided during the transition from the deactivation state to the activation state. [6] Filter device according to any of the preceding claims, characterized by that the sensor is a temperature sensor (12), a pressure sensor or a fluid level sensor. [7] Sensor (12) of a filter device (10) according to one of the preceding claims. [8] Filter housing (16) of a filter device (10) according to one of the preceding claims.

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