FILTERING DEVICE FOR GASEOUS MEDIA, FILTER ELEMENT, USE OF A FILTER ELEMENT AND METHOD OF ASSEMBLING A FILTERING DEVICE

Abstract

The invention relates to a filter device (10) for gaseous media. The filter device (10) comprises a filter housing (26) with at least one inlet opening (168) for a gaseous medium that is to be purified and with at least one outlet opening (40) for the purified gaseous medium. A filter element (16) is arranged in the filter housing (26). The filter housing (26) comprises a first housing part (12), which has a filter element receiving space (36) in which the filter element (16) is arranged. The filter housing (26) comprises a second housing part (18), on which the at least one inlet opening (168) is arranged and which has parts (162) of at least one cyclone separator (166). The second housing part (18) closes a service opening in the first housing part (12), and the first and the second housing part (12, 18) are releasably connected to each other. On a side facing the second housing part (18), the filter element (16) has a seal (96) which runs around an axis (22) and which has a peripheral sealing portion with a radially sealing action. A radially outer circumferential side of the sealing portion bears sealingly against a radially inner interior lateral surface of the first housing part (12). A rib (164), which runs around at least partially and projects from the second housing part (18) in the axial direction, exerts a pressing force on the seal (96) in order to press the sealing portion onto the interior lateral surface of the first housing part (12).

Description

1 / 66 FILTERING DEVICE FOR GASEOUS MEDIA, FILTER ELEMENT, USE OF A FILTER ELEMENT AND METHOD OF ASSEMBLING A FILTERING DEVICE Technical Field

[001] The invention relates to a filtering device for gaseous media, in particular for air, comprising a filter housing with at least one inlet opening for the gaseous medium to be purified and at least one outlet opening for the purified gaseous medium, wherein at least one filter element, comprising at least one filter medium body, is arranged in the filter housing between the at least one inlet opening and the at least one outlet opening relative to the gas flow in such a way as to separate a crude side correlated with the inlet opening from a clean side correlated with the outlet opening, wherein the filter housing comprises a first part of the housing in which the at least one outlet opening is arranged and which comprises at least one filter element receiving space in which the at least one filter element is arranged,and wherein the filter housing comprises a second housing part in which at least one inlet opening is disposed and which comprises at least parts of at least one cyclone separator, wherein the second housing part closes a service opening of the first housing part and the first and second housing parts are releasable and separable from each other so that at least one filter element can be removed through the service opening of the first housing part. Petition 870250082959, dated 09 / 15 / 2025, page 8 / 190 2 / 66

[002] Furthermore, the invention relates to a filter element for a filtering device for gaseous media, in particular for air, in particular for a filtering device according to the invention, comprising at least one filtering medium body, - wherein the filtering device comprises a filter housing with at least one inlet opening and at least one outlet opening, - where the filter element can be received in the filter housing between the inlet opening and the outlet opening, in order to separate a coarse side correlated with at least one inlet opening from a clean side correlated with at least one outlet opening, - and wherein the filter housing comprises a first part of the housing in which the outlet opening is disposed, and which comprises at least one receiving space for the filter element in which at least one filter element may be disposed, - and wherein the filter housing comprises a second housing part in which the inlet opening is disposed and which comprises at least parts of a cyclone separator, - wherein the second part of the housing closes a service opening of the first part of the housing and the first part of the housing and the second part of the housing are connectable in a releasable manner to each other and separable from each other in order to be able to remove at least one filter element through the service opening of the first part of the housing.

[003] In addition, the invention relates to the use of a filter element comprising at least one filter medium body in a filtering device according to the invention for gaseous media.

[004] In addition, the invention relates to a method for assembling a filtering device for gaseous media, in particular Petition 870250082959, dated 09 / 15 / 2025, page 9 / 190 3 / 66 of a filtering device according to the invention, in which at least one filter element is inserted through a service opening into a filter element receiving space of a first housing part, comprising at least one outlet opening for purified gaseous media, of a filter housing of the filtering device and, subsequently, the service opening is closed by a second housing part of the filter housing, comprising at least one inlet opening for gaseous media to be purified and at least parts of at least one cyclone separator. Previous technique

[005] US patent 2021 / 0077932 A1 describes an air filter assembly comprising a housing with a body, an access cover, an airflow inlet and an airflow outlet. It also comprises an air filter cartridge that is operatively disposed in the housing, wherein the axial clamping seal is pretensioned by the access cover against the body.

[006] The invention aims to design a filtering device, a filter element, the use of a filter element and a method for assembling a filtering device of the type mentioned above, in which the filtering device can be improved, in particular the filtering device can be improved with respect to function, assembly and / or mounting. Summary of the invention

[007] This objective is solved by the filtering device according to the invention insofar as at least one filtering element comprises a seal, extending circumferentially around a virtual axis, on an inlet side facing the second part of the housing, the seal comprising a sealing section that acts in a way Petition 870250082959, dated 09 / 15 / 2025, page 10 / 190 4 / 66 sealing at least partially radially with respect to the axis and extending circumferentially around the axis, wherein, with respect to the axis, a radially outer circumferential side of the sealing section rests firmly, with respect to the axis, on a radially inner wall surface of the first part of the housing, a rib, extending circumferentially at least partially around the axis and projecting away from the second part of the housing with at least one directional component in the axial direction with respect to the axis, exerts a contact pressure on the circumferential seal to press the circumferential sealing section acting at least partially radially against the inner wall surface of the first part of the housing.

[008] According to the invention, the second part of the housing comprises a circumferential rib, through which, when the filtering device is mounted, a contact pressure is exerted on the circumferential seal. As a result of the contact pressure, a section of the circumferential seal, acting at least partially radially, is pressed against an inner wall surface of the first part of the housing. In this way, the receiving space of the filter element is sealed from the environment by means of the seal. Furthermore, the coarse side of the filter element is separated from the clean side in this way.

[009] By means of the sealing section which acts at least partially radially, it is achieved that a sealing surface of the seal in the first part of the housing in relation to the second part of the housing, in an unfixed state, presents a clearance, in particular a radial opening, in relation to a contact surface of the filter housing, i.e., the surface of the inner wall of the first part of the housing. Only by fixing the second part of the housing to the first part of the Petition 870250082959, dated 09 / 15 / 2025, page 11 / 190 5 / 66 housing, the circumferential sealing section is pressed against the inner wall surface of the first part of the housing. In this way, a sealing action is generated between the first part of the housing, the second part of the housing and the filter element. In addition, a cyclone block comprising at least one cyclone separator is axially sealed with respect to the axis by the seal.

[0010] Overall, the construction of the filtering device according to the invention allows for simple mounting of the filter element in the filter housing, without any force effect. The seal can be secured by means of an axial clamping action of the first part of the housing onto the second part of the housing. For this purpose, a lever action with suitable locking elements can be used.

[0011] By means of the seal, it is possible to prevent the entry of particles and / or water on the clean side between at least one filter element and the filter housing. In addition, it is also possible to prevent the entry of particles and / or water into a region between at least one filter element and the second part of the housing, in particular an immersion tube plate and / or a cyclone block.

[0012] The filtering device and the filter element can be used in vehicles, in particular motor vehicles, in construction and / or agricultural machinery, compressors, in connection with internal combustion engines, in cathodic filters, in particular in connection with fuel cells.

[0013] The gaseous medium to be purified can be air. In this case, the filtering device can also be called an air filtering device. Through the filtering device, solid or liquid particles can be removed from the gaseous medium.

[0014] The shaft may coincide with a housing shaft of the filter housing, a filter element installation / removal shaft in Petition 870250082959, dated 09 / 15 / 2025, p. 12 / 190 6 / 66 first housing part, a connecting shaft of the first housing part and the second housing part and / or a filter element shaft. When “radial”, “coaxial”, “axial”, “tangential”, “circumferential”, “concentric”, “eccentric” or similar is mentioned in the descriptive report, this refers to the shaft, unless otherwise mentioned. In this context, “circumferential” refers to a virtual wall surface surrounding the shaft. The shaft may, in particular, be a longitudinal shaft.

[0015] Advantageously, the second housing part may be fixed to the first housing part by means of a fastening device. Advantageously, by means of the fastening device, a driving force may be generated that acts at least in the axial direction between the first housing part and the second housing part. Advantageously, the fastening device may be releasable.Advantageously, the fastening device may comprise at least one fastening element, in particular at least one screw, at least one fastening hook and / or at least one quick-release hook or similar. Advantageously, the fastening device may be engaged directly on the second part of the housing. Alternatively, or additionally, the fastening device may be engaged on a cyclone-type housing, in which the second part of the housing is arranged between it and the first part of the housing.

[0016] Advantageously, at least one cyclone separator, in particular a cyclone block with a plurality of cyclone separators, may comprise at least one dust discharge device.

[0017] Advantageously, at least one cyclone separator may be an axial cyclone.

[0018] Advantageously, the filtration device may comprise at least one cyclone block comprising a plurality of cyclone separators. In this way, a larger gas flow can be purified and the available construction space can be utilized. Petition 870250082959, dated 09 / 15 / 2025, page 13 / 190 7 / 66 optimized form.

[0019] Advantageously, at least one inlet opening and at least one outlet opening may be located, with respect to the axis, on axially opposite sides of the filter housing.

[0020] Advantageously, at least one filter medium body may comprise at least one filter bellows, in particular at least one single bellows and / or at least one double bellows.

[0021] Advantageously, the filter medium body may comprise a filter medium, in particular filter paper, non-woven filter material, filter foam or the like, which is suitable for filtering gaseous media, in particular air.

[0022] Advantageously, the filter medium of at least one filter medium body can be folded or coiled. In this way, the active surface area of ​​the filter can be enlarged. The filter element can be designed accordingly as a folded filter element or as a coiled element.

[0023] Advantageously, at least one filter element may be a compact filter element, a hollow filter element, a flat filter element, or the like.

[0024] Advantageously, the filter medium body may comprise, in particular, a zigzag-folded filter medium with deep folds. In the case of a filter medium body approximately in the shape of a cuboid or prism, deep folds are said to exist, in particular, when the fold height is at least as large as the expansion in the direction of the fold edges and / or in the direction transverse to the fold edges.

[0025] A hollow filter element is characterized in that it comprises at least one internal element that is surrounded by a filter medium.

[0026] The hollow filter element can be advantageously a Petition 870250082959, dated 09 / 15 / 2025, page 14 / 190 8 / 66 called a round filter element with a round cross-section, a round oval filter element with an oval cross-section, a flat oval round filter element with a flattened oval cross-section, a round conical filter element in which the round cross-section in the axial direction tapers towards a principal axis, a round oval conical filter element in which the oval cross-section tapers in the axial direction at least towards a transverse axis, a round oval flat conical filter element in which the flat oval cross-section in the axial direction tapers at least towards a transverse axis, or a hollow filter element with a different type of cross-section, in particular an angled cross-section and / or a different type of axial cross-sectional course in the direction of an axis of the element.

[0027] Advantageously, the rib can be arranged in a fixed manner, particularly with respect to the pressure load, and in particular in a stationary manner, in the second part of the housing. In this way, the rib is moved together with the second part of the housing during the axial assembly of the first part of the housing and the second part of the housing with the interposition of at least one filter element. This would not be possible if the second part of the housing were part of at least one filter element. In particular, the rib is moved together with the second part of the housing by the fixing action of a fastening device during assembly.

[0028] The raw side is the side where the gaseous medium still to be purified is located during the operation of the filtering device. The clean side is the side where the purified gaseous medium is located.

[0029] In an advantageous embodiment, the rib can support the circumferential sealing section, which acts at least partially radially, on a radially inner circumferential side of the sealing section, in particular on a radially circumferential side Petition 870250082959, dated 09 / 15 / 2025, page 15 / 190 9 / 66 internal sealing section that is radially opposite to the surface of the inner wall of the first part of the housing. In this way, the sealing section can be pressed against the surface of the inner wall of the first part of the housing by means of the rib, in particular directly.

[0030] Advantageously, the contact pressure exerted by the rib may comprise at least one directional component which, with respect to the axis, is radially oriented from the inside out. In this way, the corresponding sealing section can be pressed directly with the radial sealing force outward against the inner wall surface of the first part of the housing. The contact pressure exerted by the rib can thus directly produce the radial sealing force.

[0031] Alternatively or additionally, the contact pressure exerted by the rib may comprise a directional component oriented at least parallel to the axis. In this way, at least one seal may be compressed in the axial direction. The seal material may yield to compression radially outwards and thus press radially against the inner wall surface of the first part of the housing. The contact pressure exerted by the rib may thus produce the radial sealing force indirectly, in particular by deformation of the seal in the transverse direction.

[0032] Advantageously, at least one sealing section of the circumferential seal can be deformed in the filter housing with at least one filter element mounted compared to at least one filter element not yet mounted. The corresponding sealing section can thus be flexibly pressed against the inner wall surface of the first part of the housing.

[0033] In a further advantageous embodiment, the rib may contact the circumferential seal on an axial end face, Petition 870250082959, dated 09 / 15 / 2025, page 16 / 190 10 / 66 axial in relation to the axis and facing the second part of the housing, with a directional component of the contact pressure acting in the axial direction in relation to the axis. In this way, the circumferential seal can be deformed by compression. The deformed seal can then be pressed, acting partially radially, against the surface of the inner wall of the housing.

[0034] Advantageously, the rib can come into contact, in particular directly, with the circumferential seal on an end face of the inlet side in the axial direction, in order to effect a deformation of the circumferential seal and press the circumferential seal section that acts partially radially against the inner wall surface of the housing in this way.

[0035] In a further advantageous embodiment, the rib may be incorporated in a ramp shape at least in sections and / or a contact surface of the rib facing the radially inner circumferential side of the circumferential sealing section, which acts as a seal at least partially radially, may be positioned at an acute angle to the axis. In this way, the rib, during the axial assembly of the first housing part and the second housing part, may slide along the radially inner circumferential side of the sealing section and successively press it against the inner wall surface of the first housing part. Due to the wedge action between the angled rib and the sealing section, high radially acting seal pretension forces may be achieved by means of manageable axial assembly forces.

[0036] In a further advantageous embodiment, the circumferential sealing section that acts at least Petition 870250082959, dated 09 / 15 / 2025, page 17 / 190 11 / 66 partially radially can be displaced radially outward at least in sections relative to, relative to the axis, a radially external outer wall surface of the filter media body, and / or the circumferential sealing section that acts as a seal at least partially radially can project at least in sections axially beyond the inlet side of the filter media body.

[0037] According to a further advantageous embodiment, the filtering device may comprise a cyclone block with a plurality of cyclone separators, wherein the cyclone block comprises an immersion tube plate as a second part of the filter housing, which comprises a plurality of immersion tubes, and the circumferential rib is formed in the immersion tube plate, and / or at least one inlet opening may be disposed in one or more parts of at least one cyclone separator, in particular in an immersion tube of at least one cyclone separator, and / or the second part of the housing may comprise parts of a cyclone block comprising a plurality of cyclone separators, and / or the second part of the housing may comprise or be an immersion tube plate with at least one immersion tube of a cyclone separator,and / or the second part of the housing may comprise a plurality of immersion tubes of corresponding cyclone separators, Petition 870250082959, dated 09 / 15 / 2025, page 18 / 190 12 / 66 teeth, and / or the second part of the housing can be arranged between the first part of the housing and a cyclonic housing of a cyclonic block to which at least one cyclonic separator belongs. In this way, the filtering device can be designed in a compact configuration with at least one filter element and at least one cyclonic block. By means of the cyclonic block with a plurality of cyclonic separators, it is possible to achieve an efficient pre-separation of particles from the gaseous medium to be purified, minimizing the need for constructive dimensions for pre-separation.

[0038] In a further advantageous embodiment, an axial end of the inlet side of the circumferential seal, viewed in a direction axial to the axis, may project beyond a free end of the rib of the second part of the housing, and / or the rib, viewed in a direction axial to the axis, may project beyond a free end of the circumferential seal, in particular of at least one sealing section, and / or the rib may dip into a recess of the circumferential seal that is open on its side axially facing the inlet side relative to the axis, and / or the second part of the housing may comprise at least one immersion tube of at least one cyclone separator, comprising an outlet end on its side facing the inlet side of at least one filter element, which is surrounded by an edge section of the immersion tube in at least sections, wherein the edge section of the immersion tube, when the device of Petition 870250082959, dated 09 / 15 / 2025, page 19 / 190 13 / 66 filtration is mounted, it can be located at an axial distance from the free end of the circumferential seal radially within the seal section. In this way, an axial overlap between the seal and the second part of the housing, in particular the rib and / or the immersion tubes, can be achieved.

[0039] Advantageously, the edge section of the immersion tube, when the filtering device is mounted, can be positioned at an axial distance from the free end of the seal, radially inward to the sealing section. Advantageously, the outlet end, viewed axially, can be positioned beyond the axial free end of the inlet side of the circumferential seal. The edge section of the immersion tube, which surrounds the outlet end at least in sections, and therefore also the outlet end of at least one immersion tube, can, viewed axially, plunge behind the free end of the circumferential seal and therefore behind the inlet side end of at least one filter element.

[0040] In a further advantageous embodiment, the first part of the housing may comprise a radially projected collar, at least partially circumferential, which provides at least one axial contact surface on which at least one radially projected support section of the filter element is supported. In this way, the circumferential seal may be additionally supported with respect to the axis in the axial direction in the first part of the housing. Here, an additional sealing region may be realized. In the additional sealing region, at least one circumferential seal may act as a seal in the axial direction.

[0041] Advantageously, the designed collar of the first part of the housing can extend continuously in a contiguous manner, in particular circumferentially, or be interrupted.

[0042] In an additional advantageous arrangement, the necklace can buy Petition 870250082959, dated 09 / 15 / 2025, page 20 / 190 14 / 66 having at least two axial contact surfaces, in particular four axial contact surfaces, which are located at different axial heights, and / or the collar may comprise at least two collar sections, in particular four collar sections, with respective contact surfaces, each of them partially circumferentially around the axis. In this way, it is possible to obtain protection against incorrect assembly of the filtering device. In particular, an incorrect orientation of at least one filter element, of the first part of the housing and of the second part of the housing during assembly can be prevented in this way.

[0043] In a further advantageous embodiment, a contact region of the sealing section, in which the sealing section rests radially and acts as a seal on the inner wall surface of the first part of the housing, can be arranged at an axial distance of at least one axial contact surface of the collar. In this way, between the sealing section and the inner wall surface of the first part of the housing, a region can be created in which at least one sealing section does not come into contact with the inner wall surface.

[0044] In a further advantageous embodiment, the first housing part and the second housing part may form a sealing chamber in which the circumferential sealing section, at least partially radially, is received. The sealing chamber is radially delimited inwardly by the rib of the second housing part, radially outwardly by the inner wall surface of the first housing part, and axially by a collar connected to the second housing part, in particular by a collar of another part connected to the second housing part. In this way, it is Petition 870250082959, dated 09 / 15 / 2025, page 21 / 190 15 / 66 provided a space within which the sealing section can be accommodated even after deformation.

[0045] Advantageously, the collar can provide an axial sealing surface on which the circumferential seal rests, acting as a seal in the axial direction. In this way, a sealing action is possible in the external direction, particularly in relation to the environment.

[0046] Advantageously, the sealing chamber can be axially delimited on the entry side by a collar that is connected to the second part of the housing, in particular by a collar of another part that is connected to the second part of the housing.

[0047] In a further advantageous embodiment, the circumferential seal may be delimited at an axial end facing away from the second part of the housing by a structural element that extends at least partially circumferentially around the axis and connected to the filter media body, wherein the structural element, in particular a surface of the structural element, is at least partially exposed, and wherein the structural element, in particular at least an exposed section of the structural element, may form at least partially a radially projecting support section of the filter element, which is supported on an axial support surface of a radially projecting collar of the first part of the housing. In this way, the circumferential seal may be supported on its axially facing away from the second part of the housing.Furthermore, in this way, at least one support section can be stably connected to the filter media body, allowing for a tight and secure contact of the filter element in the housing.

[0048] Advantageously, the structural element can be made of, or be composed of, plastic material. In this way, the structural element can be manufactured in a robust, flexible, and lightweight manner. In this case, the term “plastic structure” can also be used. Petition 870250082959, dated 09 / 15 / 2025, page 22 / 190 16 / 66 for the structural element. Alternatively or additionally, the structural element may also be composed of, or advantageously be composed of, at least one other material, in particular metal, carbon fibers or a composite material.

[0049] Advantageously, the structural element may form part of a filter element skeleton and / or may be connected to a filter element skeleton. At least one filter media body may be fixed to the skeleton. By means of the skeleton, at least one filter element may be stabilized and its shape maintained. At least part of the skeleton may be composed of plastic, metal, carbon fibers, or a composite material.

[0050] Advantageously, the skeleton, in particular the skeleton with the structural element, can be manufactured as a single piece. In this way, the skeleton can be manufactured to be particularly stable.

[0051] The structural element can also be configured as a separate component of the skeleton in some embodiments.

[0052] In a further advantageous embodiment, the structural element, starting at at least one exposed section, may extend at least in sections in the axial direction towards the entry side and / or radially inward, and / or the structural element may be embedded, at least in sections, by the circumferential sealing material.

[0053] Advantageously, the structural element can extend at least in sections in the axial direction towards the inlet side and / or radially inwards. In this way, it is possible to obtain stabilization for at least one filter medium body. Furthermore, a part of the structural element can serve as a casting mold for the sealing material. Petition 870250082959, dated 09 / 15 / 2025, page 23 / 190 17 / 66

[0054] As an alternative or additionally advantageously method, the structural element can be embedded, at least in sections, in the circumferential seal material. In this way, the bearing action of the seal can be improved.

[0055] In a further advantageous embodiment, in a state of the filtering device where at least one filter element is disposed in the receiving space of the at least one filter element and the second part of the housing is released from the first part of the housing, there may be a radial clearance between the inner wall surface of the first part of the housing and the radially outer circumferential side of the circumferential sealing section that acts at least partially. In this way, the at least one filter element can be moved axially into or out of the receiving space of the filter element without the radially acting circumferential sealing section coming into contact with the inner wall surface of the first part of the housing, minimizing the mounting forces.

[0056] In a further advantageous embodiment, the filter medium body may comprise a cross-sectional shape comprising at least two curved sides connected by two straight sides in particular, and / or the filter medium body may comprise a radially external section of the filter medium and a radially internal section of the filter medium which, with respect to the axis, are each circumferentially continuous, wherein the radially internal section of the filter medium is disposed within the radially external section of the filter medium, and / or an external wall of the filter medium body, in particular of a radially external section of the filter medium body, may comprise an elongated oval cross-section, Petition 870250082959, dated 09 / 15 / 2025, page 24 / 190 18 / 66 and / or an inner wall of the filter medium body, in particular of a radially inner section of the filter medium body, may comprise an elongated oval cross-section, and / or an outer wall of the filter medium body, in particular of a radially outer section of the filter medium body, may taper, in particular taper conically, viewed from the inlet side in the direction of the axis, and / or an inner wall of the filter medium body, in particular of a radially inner section of the filter medium body, may taper, in particular taper conically, viewed from the outlet side in the direction of the axis. In this way, a filter medium comprising an improved ratio between space requirement and filter surface area can be produced.

[0057] Advantageously, a section of the filter medium can be made into a filter bellows. In the case of a filter bellows, the filter medium can be folded. In this way, an increase in the active surface area of ​​the filter can be obtained.

[0058] In a further advantageous embodiment, at least one section of the filter medium of the filter medium body, in particular a radially external section of the filter medium body, can flow radially from the inside to the outside, and / or at least one section of the filter medium of the filter medium body, in particular a radially internal section of the filter medium body, can flow radially from the outside to the inside. In this way, the ratio between the axial expansion and the radial expansion of the filter element can be improved. In this way, it is possible to obtain an element Petition 870250082959, dated 09 / 15 / 2025, page 25 / 190 19 / 66 filter with an elongated configuration in the axial direction compared to radial expansion.

[0059] In a further advantageous embodiment, the at least one filter medium body may comprise at least two filter bellows, in particular an inner filter bellows and an outer filter bellows, in particular at least two folded filter bellows, which extend at least partially around the axis and may be traversed in parallel by the gaseous medium to be purified, and / or an inner filter bellows of the at least one filter medium body may be disposed in an interior that is surrounded by an outer filter bellows of the at least one filter medium body, and / or the at least one filter medium body may comprise at least one filter bellows, in particular an inner filter bellows and / or an outer filter bellows comprising an inclination relative to the axis.By utilizing a plurality of filter bellows and their special arrangements in relation to each other, the relationship between the space requirement and the surface area of ​​the active filter fluid can be improved as a whole.

[0060] In this context, “flowing in parallel” means that the filter bellows are operationally arranged, in particular in relation to the flow of the gaseous medium, in a parallel manner. This does not mean that the filter bellows are arranged in parallel in the geometric sense. The filter bellows are flowed in parallel by the gaseous medium to be purified. In contrast, in a series arrangement of the filter bellows, they are flowed one after the other, i.e., in series.

[0061] In a further advantageous embodiment, the filtering device may comprise at least one additional filter element, Petition 870250082959, dated 09 / 15 / 2025, page 26 / 190 20 / 66 in particular a secondary filter element, which is fluidically arranged downstream of at least one filter element, in particular a primary filter element, comprising the circumferential seal. In this way, the separation of particles from the gaseous medium to be purified can be further improved and, alternatively or additionally, the entry of contaminants into the clean side during maintenance of the primary filter element can be avoided.

[0062] Advantageously, at least one additional filter element, in particular the secondary filter element, can be arranged in the filter element receiving space, spatially between the filter element with at least one circumferential seal and at least one outlet opening of the filter housing. In this way, the filtering device can be constructed in a more compact configuration.

[0063] Furthermore, the objective is solved according to the invention for the filter element, insofar as the at least one filter element on an inlet side, which may be disposed facing the second part of the housing, comprises a seal extending circumferentially around a virtual axis, comprising a sealing section that acts as a seal at least partially radially with respect to the axis and extending circumferentially around the axis, wherein, with respect to the axis, a radially external circumferential side of the sealing section may be firmly contacted with respect to the axis, on a radially internal inner wall surface of the first part of the housing, by a rib extending circumferentially at least partially around the axis and projecting away from the second part of the housing with at least one directional component in the axial direction,A contact pressure can be exerted on the circumferential seal to press the section of the circumferential seal. Petition 870250082959, dated 09 / 15 / 2025, page 27 / 190 21 / 66 capable of acting at least partially radially as a seal against the inner wall surface of the first part of the housing.

[0064] Furthermore, the objective is solved according to the invention for use in which the filter element comprises a circumferential seal on an inlet side that is facing a second part of the filtering device housing, which comprises a circumferential sealing section that acts as a seal at least partially radially with respect to a virtual axis, which, with respect to the axis, with a radially external circumferential side rests firmly on, with respect to the axis, a radially internal inner wall surface of the first part of the housing, in which a rib at least partially circumferential, which projects with at least one directional component in an axial direction away from the second part of the housing,It exerts a contact pressure on the circumferential seal to press the circumferential sealing section, which acts as a seal at least partially radially, against the inner wall surface of the first part of the housing.

[0065] Furthermore, the objective is solved according to the invention for the method, wherein a seal, extending circumferentially around a virtual axis on one inlet side of at least one filter element facing the second part of the housing, is pressed in a manner at least partially radial by a rib, extending circumferentially around the axis and projecting away from the second part of the housing with at least one directional component in the axial direction relative to the axis, against, relative to the axis, a radially inner wall surface of the first part of the housing.

[0066] According to the invention, at least one filter element is simply inserted into the filter housing, without any force effect. Petition 870250082959, dated 09 / 15 / 2025, p. 28 / 190 22 / 66

[0067] Advantageously, the installation of the filter element in the filter element receiving space of the first part of the housing and the fixing of the second part of the housing to the first part of the housing can be carried out in the axial direction with respect to the axis.

[0068] Advantageously, a circumferential seal fastening action can be performed by means of fastening means that engage between the first housing part and the second housing part.

[0069] Advantageously, the filter element for the gaseous medium, in particular the air filter element, for a filtering device may comprise at least one filter medium body with an inlet side and an outlet side that are present, respectively, at the axial ends of the filter medium body facing each other with respect to a virtual axis, - and a structural element that extends at least partially circumferentially around at least one filter medium body, which, with respect to the axis, projects radially beyond the filter medium body and is connected to at least one filter medium body, - where, on one side of the structural element facing the entrance, there is a seal that extends circumferentially around the axis, - and wherein, on one side of the structural element facing the outlet side, at least one support section is present by means of which the filter element in a filter housing of a filtering device can be supported at least in the axial direction with respect to the axis.

[0070] Advantageously, in the filter element, at least one support section may comprise at least two support surfaces, distributed around the span encircling the shaft, which are Petition 870250082959, dated 09 / 15 / 2025, page 29 / 190 23 / 66 spaced apart from each other in the axial direction relative to the axis, and the circumferential seal may comprise a circumferential seal support that projects relative to the axis in the axial direction and is configured to seal at least partially radially relative to the axis with respect to a corresponding sealing surface of the filter housing.

[0071] Advantageously, the support section may comprise at least two, in particular four, support surfaces distributed around the circumference, which are spaced from each other in relation to the axial direction, respectively. In this way, by means of the support surfaces at different axial heights, protection against incorrect mounting of the filter element in the filter housing can be obtained.

[0072] Advantageously, the sealing support, in the axial direction relative to the axis, can project beyond the inlet side of at least one filter media body. In this way, the inlet side of the filter media body can be arranged radially within the circumferential sealing support relative to the axis.

[0073] Advantageously, the sealing support can be arranged immediately adjacent to, with respect to the axis, a radially external wall surface of the structural element and / or the sealing support can be arranged completely radially outside, with respect to the axis, a radially external wall surface of at least one filter media body.

[0074] Advantageously, the sealing support can be arranged immediately adjacent to the radial surface of the outer wall of the structural element. In this way, the sealing support can be supported by the structural element in the axial direction relative to the axis.

[0075] As an alternative or additional method, the sealing support can be advantageously arranged completely radially. Petition 870250082959, dated 09 / 15 / 2025, page 30 / 190 24 / 66 outside the radially outer wall surface of at least one filter media body. In this way, the sealing support and at least one filter media body can be better separated with respect to contact pressure to perform the sealing action.

[0076] Advantageously, the structural element can be made to be less flexible than the circumferential seal, in particular, the structural element can be formed of a harder material than the circumferential seal and / or the seal can comprise or be composed of elastic material, in particular an elastomer, in particular a foamed elastomer, and / or the structural element can comprise or be composed of plastic material, in particular rigid injection-moldable plastic material.

[0077] Advantageously, the structural element can be designed to be less flexible than the circumferential seal. In this way, the structural element performs a support function and the seal provides better deformability. In this context, differentiated flexibility can be achieved through different materials and / or through different shapes.

[0078] Advantageously, the structural element can be formed from a harder material than the circumferential seal. In this way, the structural element can be shaped to be less flexible than the seal. The material can be a single material or a mixture of materials, in particular a composite material.

[0079] Alternatively or additionally, the structural element may be manufactured in sections of the same material as the seal, in particular of a sealing material. In this way, the connection between the structural element and the seal may be improved.

[0080] Alternatively or additionally, the structural element and the seal may be manufactured as a multi-component piece, in particular a two-component piece. In this way, the Petition 870250082959, dated 09 / 15 / 2025, page 31 / 190 25 / 66 manufacturing can be simplified.

[0081] Advantageously, the seal and the structural element can be produced by a multi-component injection molding method, in particular a two-component injection molding method.

[0082] Alternatively or additionally, the seal may be made of, or advantageously made of, elastic material. In this way, the seal can be deformed. An elastic seal can be produced simply from an elastomer, in particular, a foamed elastomer.

[0083] Alternatively or additionally, the structural element can be made of or composed of plastic material. In this way, it is possible to obtain a stable and lightweight structural element. A rigid and robust structural element can be obtained simply by injection molding from rigid injection-moldable plastic material. Complex shapes for the structural element can also be obtained by injection molding.

[0084] Advantageously, the circumferential seal can be delimited on one side facing the outlet side by the structural element and / or a surface of the structural element facing the outlet side can be exposed at least in sections and provide at least one support section. Due to the delimitation by the structural element, the circumferential seal can be supported on the structural element on the side facing the outlet side. In the exposed sections, the surface of the structural element can contact a corresponding section of the filter housing without the interposition of sealing material.

[0085] Advantageously, the structural element may extend, starting at the support section, radially inward and / or in the direction of the entry side and / or the structural element, at least in Petition 870250082959, dated 09 / 15 / 2025, page 32 / 190 26 / 66 sections, can be embedded in the circumferential sealing material.

[0086] Advantageously, the structural element can extend radially inward from the support section and / or in the direction of the inlet side. In this way, it is possible to obtain stabilization for at least one filter medium body. Furthermore, in this way, a part of the structural element can serve as a casting mold for the sealing material.

[0087] As an alternative or additional method, the structural element may be advantageously incorporated, at least in sections, into the circumferential seal material. In this way, the bearing action of the seal may be improved.

[0088] Advantageously, the structural element, in relation to its stroke, at least on its outer radial surface and / or its inner radial surface, must not exhibit rotational symmetry with respect to the axis. In this way, incorrect mounting of the filter element, in particular incorrect alignment, during installation in the filter housing can be avoided.

[0089] Advantageously, the structural element, along its circumferential course around the axis, may have at least four sections, the respective neighboring sections having differently curved, even straight, courses, and, in the case of at least one pair of, respectively, two of the sections on opposite sides of the axis, the corresponding sections have differently curved courses, and / or the circumferential sealing support projecting in the axial direction may comprise at least four sections along its circumferential course around the axis, the respective neighboring sections having differently curved, even straight, courses, and, in the case of at least one pair of, respectively, two of the sections on opposite sides of the axis, the corresponding sections have differently curved courses. In this way, symmetry can be avoided. Petition 870250082959, dated 09 / 15 / 2025, page 33 / 190 27 / 66 rotational movement of the structural element and / or sealing support relative to the axis. In this way, incorrect mounting of the filter element in the filter housing can be avoided.

[0090] Advantageously, the structural element may comprise at least two curved sections curved with respect to their circumferential course around the axis, which are connected by two connecting sections, in particular two straight connecting sections with respect to their circumferential course around the axis, wherein the connecting sections, in particular the straight connecting sections, are present on the long sides of the structural element, which are opposite each other with respect to the axis, and the two curved sections are present on the short sides of the structural element, which are opposite each other with respect to the axis, and / or the circumferential sealing support projecting in the axial direction comprises at least two curved sections curved with respect to their circumferential course around the axis, which are connected by two connecting sections, in particular two straight connecting sections with respect to their circumferential course around the axis, wherein the connecting sections,Specifically, the straight connecting sections are present on the long sides of the sealing support, which are opposite each other with respect to the axis, and the two curved sections are present on the short sides of the sealing support, which are opposite each other with respect to the axis. In this way, rotational symmetry of the structural element and / or the sealing support with respect to the axis can be avoided. In this way, incorrect mounting of the filter element in the filter housing can be avoided.

[0091] Advantageously, the structural element may comprise a first curved section and a second curved section, wherein the first curved section, at least in some sections, comprises a larger radius of curvature than the second curved section, and / or the circumferential sealing support, projecting in the axial direction, may with Petition 870250082959, dated 09 / 15 / 2025, page 34 / 190 28 / 66 to include a first curved section and a second curved section, wherein the first curved section, at least in some sections, comprises a larger radius of curvature than the second curved section. Due to the different curvatures of the curved sections, in combination with the different lengths of the connecting sections and the curved sections, a rotational symmetry about the axis can be avoided.

[0092] Advantageously, the first curved section of the structural element may comprise a flattened region in which the radius of curvature relative to the radius of curvature of the second curved section is greater and / or the first curved section of the sealing support may comprise a flattened region in which the radius of curvature relative to the radius of curvature of the second curved section is greater. In this way, different radii of curvature can be easily obtained.

[0093] Advantageously, at least one of the structural element's bearing surfaces may be present in at least one long side region of the structural element. In this way, a bearing action with a large surface area can be obtained.

[0094] Advantageously, then, with respect to the axis, the surface of the radially external wall of the filter medium body may comprise at least two curved sections curved with respect to their circumferential course around the axis, which are connected by two connecting sections, in particular two straight connecting sections, and / or an external circumference of the filter medium is reduced, viewed in the axial direction from the inlet side to the outlet side, in particular the filter medium body may taper, in particular taper conically, with respect to its radially external side, when viewed in the axial direction from the inlet side to the outlet side.

[0095] Due to the combination of at least two curved sections and the connecting sections, it is possible to obtain an oval external shape of the filter medium body, viewed in the direction of the axis. Advantageously, the Petition 870250082959, dated 09 / 15 / 2025, page 35 / 190 29 / 66 Two connecting sections can be straight. In this way, an elongated oval outer shape of the filter medium body can be obtained.

[0096] Due to the reduction in the outer circumference, viewed from the inlet side to the outlet side, a space around the filter medium body can be enlarged within the filter housing.

[0097] Advantageously, the flow of the filter media body can be radial in relation to the axis, from inside to outside, or in the reverse direction. In this way, the relationship between the required installation space and the available active filter surface area of ​​the filter media body can be improved, to the benefit of the active filter surface.

[0098] Advantageously, the at least one filter medium body may comprise at least two filter bellows, in particular an inner filter bellows and an outer filter bellows, in particular at least two folded filter bellows that extend at least partially around the axis and can be traversed in parallel by the gaseous medium to be purified, and / or an inner filter bellows of the at least one filter medium body may be disposed in an interior that is enclosed by an outer filter bellows of the at least one filter medium body, and / or the at least one filter medium body may comprise at least one filter bellows, in particular an inner filter bellows, and / or an outer filter bellows comprising an inclination relative to the axis.By using a plurality of filter bellows and their specific arrangement in relation to each other, the relationship between the space required and the active surface area of ​​the filter to be traversed can be improved as a whole.

[0099] In this context, “flowing in parallel” means that the filter bellows are operationally arranged, particularly in relation to the flow of the gas medium, in a parallel manner. This does not mean that the filter bellows are arranged in parallel in a geometric sense. The bellows Petition 870250082959, dated 09 / 15 / 2025, page 36 / 190 30 / 66 filter bellows are fluids that run parallel to the gaseous medium to be purified. In contrast, in a series arrangement of filter bellows, they are fluids that run one after the other, that is, in series.

[00100] Advantageously, with respect to the axis, radially between the at least two filter bellows, in particular radially between the inner and outer filter bellows, there may be at least one fluid-permeable support element, in which at least one of the at least two filter bellows, in particular an inner filter bellows and / or an outer filter bellows, is supported at least in sections, and / or the filter element comprises at least one support element in which at least one of the filter bellows is supported, wherein the at least one support element may be formed as a single piece together with the structural element. By means of the support element, the stability of the shape of the filter medium body may be improved. In this context, fluid permeability allows the flow of the gaseous medium not to be impaired.

[00101] Advantageously, the filter element may comprise at least one support element on which at least one of the filter bellows is supported, wherein the at least one support element may be formed as a single piece together with the structural element. In this way, mechanical stability can be further enhanced.

[00102] Advantageously, the support element and / or the structural element can be part of a skeleton. Through the skeleton, the entire shape of the filter element can be stabilized.

[00103] Advantageously, the filtering device for gaseous media, in particular for air, may comprise a filter housing with at least one inlet opening for the gaseous medium to be purified and at least one outlet opening for the purified gaseous medium, Petition 870250082959, dated 09 / 15 / 2025, page 37 / 190 31 / 66 - wherein, in the filter housing, with respect to the gas flow between at least one inlet opening and at least one outlet opening, at least one filter element comprising at least one filter medium body is arranged in such a way that the latter separates a coarse side correlated with the inlet opening from a clean side correlated with the outlet opening, - wherein the filter housing comprises a first housing part in which at least one outlet opening is disposed and which comprises at least one receiving space for the filter element in which at least one filter element is disposed, - and wherein the filter housing comprises a second housing part in which at least one inlet opening is disposed and which comprises at least parts of at least one cyclone separator, - wherein the second part of the housing closes a service opening of the first part of the housing and the first and second parts of the housing are connected in a releasable manner to each other and separable from each other so that at least one filter element can be removed through the service opening of the first part of the housing.

[00104] Advantageously, at least one of the filter elements may be a filter element according to the invention.

[00105] Advantageously, the filter element comprising at least one filter medium body can be used in a filtering device for gaseous media. Advantageously, the filter element can be a filter element according to the invention.

[00106] Advantageously, in a method for assembling a filtering device for gaseous media, at least one filter element can be introduced through a service opening in a Petition 870250082959, dated 09 / 15 / 2025, p. 38 / 190 32 / 66 receiving space for filter elements of a first part of the housing, comprising at least one outlet opening for the purified gas medium, of a filter housing of the filtering device and, subsequently, the service opening may be closed by a second part of the filter housing, comprising at least one inlet opening for the gas medium to be purified and at least parts of at least one cyclone separator. Advantageously, at least one filter element according to the invention may be introduced into the receiving space for filter elements.

[00107] In other respects, the features and advantages described in relation to the filtering device according to the invention, the filter element according to the invention, the use according to the invention and the method according to the invention and their respective advantageous embodiments apply to each other and vice versa.Individual characteristics and advantages can, of course, be combined with each other, potentially resulting in additional beneficial effects that go beyond the sum of the individual effects. Brief Description of the Drawings

[00108] Other advantages, features and details of the invention result from the following description, in which embodiments of the invention will be explained in more detail with the aid of the drawing. A person skilled in the art will consider the features described together in the drawing, description and claims, both conveniently and individually, and will combine them in convenient further combinations. The description is shown schematically in:

[00109] Figure 1 is an isometric illustration of a filtration device for gaseous media with a cyclonic block, showing the side of an outlet port;

[00110] Figure 2 is an isometric illustration of the filtering device of Figure 1 without the cyclone block, showing one side of Petition 870250082959, dated 09 / 15 / 2025, page 39 / 190 33 / 66 inlet of a main filter element of the filtering device;

[00111] Figure 3 is an enlarged illustration of the filtering device in Figures 1 and 2;

[00112] Figure 4 is a detailed view of an immersion tube plate of the cyclone block of the filtering device of Figures 1 to 3 in the region of a circumferential rib;

[00113] Figure 5 is a detailed view of the main filter element of the filtering device of Figures 1 to 3 in the region of a circumferential seal;

[00114] Figure 6 is a longitudinal section through the filtering device of Figures 1 to 3;

[00115] Figure 7 is a detailed view of the longitudinal section of the filtering device of Figure 6 in the region of the circumferential seal of the main filter element;

[00116] Figure 8 is a longitudinal section through the filtering device of Figures 1 to 3 without a cyclone housing of the cyclone block;

[00117] Figure 9 is a detailed view of the longitudinal section of the filtering device of Figure 8 in the region of the circumferential seal of the main filter element;

[00118] Figure 10 is a longitudinal section through the filtering device of Figures 1 to 3 without the cyclone block;

[00119] Figure 11 is a detailed view of the longitudinal section of the filtering device of Figure 10 in the region of the circumferential seal of the main filter element;

[00120] Figure 12 is an isometric illustration of a housing container for the filtering device of Figures 1 and 3, showing a service opening where a rear filter element is disposed in the housing container;

[00121] Figure 13 is an illustration of the housing container of Petition 870250082959, dated 09 / 15 / 2025, p. 40 / 190 34 / 66 Figure 12 with an axial viewing direction of the service opening;

[00122] Figure 14 is a longitudinal section through the housing container of Figures 12 and 13 with the filter element behind along a section line XIV-XIV of Figure 13;

[00123] Figure 15 is a detailed view of the longitudinal section of Figure 14 in the region of a housing container collar that surrounds the service opening;

[00124] Figure 16 is an isometric illustration of a skeleton of the main filter element of the filtering device of Figures 1 to 3 with the viewing direction from the inlet side of the main filter element;

[00125] Figure 17 is an isometric illustration of the skeleton of Figure 16 with the viewing direction from the outlet side of the main filter element;

[00126] Figure 18 is a side view of a short side of the skeleton of Figures 16 and 17;

[00127] Figure 19 is a side view of a long side of the skeleton of Figures 16 to 18;

[00128] Figure 20 is an isometric illustration of the main filter element of the filtering device of Figures 1 to 3 with a viewing direction from one outlet side;

[00129] Figure 21 is an isometric illustration of the main filter element of the filtering device of Figures 1 to 3 with a viewing direction from one inlet side;

[00130] Figure 22 is a side view of a long side of the main filter element of the filtering device of Figures 1 to 3;

[00131] Figure 23 is a side view of a short side of the main filter element of the filtering device of Figures 1 to 3.

[00132] In the Figures, the same components are provided with the same reference characters. Petition 870250082959, dated 09 / 15 / 2025, page 41 / 190 35 / 66 Invention modality(ies)

[00133] In Figures 1 to 23, a filtering device 10 for gaseous media and its components are shown in different illustrations. Gaseous media, such as air, can be freed from solid particles, such as dust, by means of the filtering device 10.

[00134] The filtering device 10 can be used in vehicles, for example, motor vehicles, in construction and / or agricultural machinery, compressors in connection with internal combustion engines, in cathodic filters, for example, in connection with fuel cells, or similar.

[00135] The filtering device 10 comprises, as shown, for example, in an enlarged illustration in Figure 3, a housing container 12, a rear filter element 14, a main filter element 16, an immersion tube plate 18 and a cyclone housing 20. The filtering device 10 as a whole is constructed axially with respect to an axis 22.

[00136] The components of the filtering device 10 and their arrangement in relation to each other with respect to the virtual axis 22 will be explained below. The axis 22 may coincide with an axis of the housing container 12, an axis of installation / removal of the rear filter element 14 and the main filter element 16 in the housing container 12, respectively, out of the housing container 12, an axis of connection of the immersion tube plate 18 to the housing container 12, an axis of connection of the cyclonic housing 20 to the housing container 12, an axis of the rear filter element 14, an axis of the main filter element 16, an axis of the housing container 12, an axis of the immersion tube plate 18 and an axis of the cyclonic housing 20. When in the descriptive report “radial”, “coaxial”, “axial”, “tangential”, “circumferential”, "concentric", "eccentric" Petition 870250082959, dated 09 / 15 / 2025, page 42 / 190 If 36 / 66 or similar is mentioned, this refers to axis 22, unless otherwise specified. In this context, "circumferential" refers to the course of the respective virtual wall surfaces surrounding axis 22.

[00137] In the connected state, the immersion tube plate 18 and the cyclone housing 20 form the cyclone block 24. Conversely, the housing container 12, as the first part of the housing, and the immersion tube plate 18, as the second part of the housing, form a filter housing 26 in the connected state. When the filtering device 10 is assembled, the immersion tube plate 18 is connected by means of screws to the cyclone housing 20.

[00138] Next, the housing container 12 will be explained in more detail with the aid of Figures 3 and 12 to 15.

[00139] The housing 12 container is manufactured in one piece. The housing 12 container is composed, for example, of plastic material, for example, a rigid plastic material.

[00140] The housing container 12 comprises a housing wall 30 that contiguously surrounds the shaft 22. On an axial end face of the housing container 12, a housing bottom 32 joins the housing wall 30. On the side that is axially facing away from the housing bottom 32, the housing wall 30 surrounds a service opening 34.

[00141] The wall of housing 30 and the bottom of housing 32 delimit a receiving space for the filter element 36 of the housing container 12. The rear filter element 14 and the main filter element 16 are arranged in the receiving space for the filter element 36 when the filtering device 10 is installed. In this context, the rear filter element 14 and the main filter element 16 can be inserted into the receiving space for the filter element 36 and removed through the service opening 34.

[00142] A 38 output socket is integrated into the bottom of the Petition 870250082959, dated 09 / 15 / 2025, page 43 / 190 37 / 66 housing 32. The outlet 38 comprises an outlet opening 40 for the purified gaseous medium. The outlet 38 extends, for example, axially to the shaft 22. For example, the outlet 38 has a circular cylindrical shape.

[00143] In the region axially adjacent to the bottom of housing 32, on the side axially facing the service opening 34, the wall of housing 30 is stepped twice radially outwards. As a whole, the housing container 12 tapers axially towards the bottom of housing 32. The stepped region forms a receiving region for the rear filter element 14. The filter element receiving space region 36, located between the stepped region and the service opening 34, serves to receive the main filter element 16.

[00144] Viewed perpendicular to axis 22, the wall of housing 30 has an elongated oval cross-section.

[00145] On the axial side with the service opening 34, the housing wall 30 comprises a collar 42 that surrounds the shaft 22 contiguously.

[00146] Viewed in the axial direction, collar 42 has an elongated oval cross-section. The elongated oval cross-section of collar 42 differs, however, from the elongated oval cross-section of the housing wall 30, between collar 42 and the bottom of housing 32. The housing wall 30 is symmetrical with respect to a 180° rotation around axis 22 in the region between the bottom of housing 32 and collar 42. In contrast, the collar wall 44 does not exhibit rotational symmetry with respect to axis 22. This will be explained in more detail below.

[00147] The collar wall 44 is radially displaced outwards relative to a section of the main wall 46 of the housing wall 30. The section of the main wall 46 extends in the axial direction between the collar 42 and the bottom of the housing 32. Petition 870250082959, dated 09 / 15 / 2025, page 44 / 190 38 / 66

[00148] A collar 48 extends between the main wall section 46 and the collar wall 44.

[00149] On its axially oriented inner side, which faces the receiving space of the filter element 36, the collar 48 comprises a plurality of contact surfaces 50. The contact surfaces 50 are arranged circumferentially along the collar 48 in respective collar sections of the collar 42. To facilitate differentiation, the reference characters of the contact surfaces 50 may be given with the indices A, B, C or D, i.e., 50a, 50b, 50c or 50d.

[00150] A ramp surface 52 is arranged between contact surface 50a and contact surface 50d. On the radially opposite side, between contact surface 50c and contact surface 50d, another ramp surface 52 is arranged. The two ramp surfaces 52 are arranged on radially opposite sides.

[00151] The contact surfaces 50 extend in the circumferential direction and perpendicular to axis 22. The ramp surfaces 52 extend circumferentially and are inclined relative to axis 22 in the axial direction towards axis 22, as seen from the service opening 34.

[00152] The ramp surfaces 52 of the collar 42 extend along the long sides 54 of the filtering device 10, which, as a whole, viewed in the axial direction, has an elongated oval configuration. The short sides 56 extend between the long sides 54, respectively.

[00153] Hereafter, the reference characters long sides 54 and short sides 56 are used for greater clarity for the filtering device components 10 that have an elongated oval cross-section.

[00154] A flat curved section 58 extends on one of the short sides 56 of the collar wall 44. A circular curved section 60 of the wall Petition 870250082959, dated 09 / 15 / 2025, p. 45 / 190 39 / 66 of collar 44 extends on the short side 56 which is opposite with respect to axis 22. The flat curved section 58 has a larger radius of curvature than the circular curved section 60. Between the flat curved section 58 and the circular curved section 60, a straight connecting section 62 of the collar wall 44 extends along the long sides 54, respectively.

[00155] In the region of the planar curved section 58, three contact surfaces 50a, 50b, and 50c are provided. The fourth contact surface 50d is located on the side of the circular curved section 60. The two lateral contact surfaces 50a and 50c extend, respectively, from the transition of the respective straight connection section 62 to the planar curved section 58, to the third contact surface 50b. The third contact surface 50b extends between the lateral contact surfaces 50a and 50c.

[00156] The central contact surface 50b in the flat curved section 58 and the contact surface 50d in the circular curved section 60 are positioned at the same axial height. The contact surfaces 50a, 50b, and 50c in the flat curved section 58 are located, as can be seen, for example, in Figures 14 and 15, at different axial levels. The central contact surface 50b and the contact surface 50d are located, viewed in the axial direction, closer to the free edge of the collar wall 44 than the two outer contact surfaces 50a and 50c. An axial distance 64 between the contact surface 50d and the contact surface 50a is less than a distance 66 between the contact surface 50d and the contact surface 50c.

[00157] The contact surface 50d extends circumferentially, as seen in Figure 13, for example, at the center of the circularly curved section 60 in the part of the circularly curved section 60 approximately around a circumferential angle of approximately 90° around a circle center, not shown, of the circularly curved section 60.

[00158] Between the contact surface 50d and each of the surfaces Petition 870250082959, dated 09 / 15 / 2025, page 46 / 190 40 / 66 of adjacent ramp 52, there is a depression 68, respectively. The depressions 68 extend in the axial and radial directions along the collar wall 44, respectively. The ramp surfaces 52 extend along the collar wall 44, from the respective straight connection sections 62, to the respective circularly curved sections 60.

[00159] In the main wall section 46 of the housing wall 30, a plurality of grooves 70 extend approximately axially from the collar 48, to a position immediately before the stepped region of the housing wall 30, respectively. The grooves 70 are arranged distributed along the main wall section 46 in a circumferential direction. Each of the grooves 70 is formed by radially outward projections in the main wall section 46. Each of the grooves 70 forms an elongated recess on the radially inner face of the main wall section 46.Furthermore, each of the grooves 70 forms an elongated projection on the radially external face of the main wall section 46. Depending on the circumferential position, the grooves 70 open towards the contact surfaces 50 or the ramp surfaces 52. Viewed in an axial direction, the cross-sections of the grooves 70 taper towards the bottom of the housing 32, respectively.

[00160] Furthermore, on the radially outer side of the main wall section 46, a total of eight fastening blocks 72 are arranged. Four of the fastening blocks 72 are located, in this context, on the side of the main wall section 46 that is axially facing the collar 42. The other four fastening blocks 72 are located on the side that is axially facing the stepped region adjacent to the bottom of the box 32. On each of the fastening blocks 72, a screw collar 74 is arranged on the side that faces the corresponding long side 54. The screw collars 74 are made as flat metal plates, for example. The screw collars 74 Petition 870250082959, dated 09 / 15 / 2025, page 47 / 190 41 / 66 on a common long side 54 extend in a plane. Each of the screw collars 74 comprises a threaded hole. The axes of the threaded holes of the screw collars 74 extend parallel to each other. By means of the screw collars 74, the filtering device 10 can be fixed to the corresponding fastening elements. The retaining elements can be, for example, fixedly connected to the machine in which the filtering device 10 is to be used.

[00161] Furthermore, on the outer side of collar 48, which is axially directed away from the wall of collar 44, a total of four fastening noses 76 are arranged on the outer side. The fastening noses 76 project axially from the wall of collar 44 away from the wall of collar 44. Two of the fastening noses 76 are located in the region of the flat curved section 58, in the vicinity of the transitions from the flat curved section 58 to the respective adjacent straight connecting sections 62. The other two fastening noses 76 are located in the region of the circular curved section 60, in the vicinity of the transitions to the respective adjacent straight connecting sections 62. Viewed in the axial direction, the fastening noses 76 are aligned respectively with the axially adjacent fastening blocks 72. The fastening noses 76 serve to be engaged by the respective fastening clamps 78.The 78 fastening clamps, as will be explained in more detail below, are supported in the cyclonic housing 20.

[00162] Between collar 48 and the free edge of collar wall 44, collar wall 44 comprises, on the radially inner circumferential side, an inner wall surface 86 extending in the circumferential direction. On the side axially facing the free edge of collar wall 44, the inner wall surface 86 comprises a ramp section 80. In ramp section 80, the inner wall surface 86 extends at an angle to axis 22. The radially inner circumference of collar wall 44 widens in ramp section 80. Petition 870250082959, dated 09 / 15 / 2025, page 48 / 190 42 / 66 in the axial direction towards the free edge. The ramp section 80 therefore forms a funnel-shaped insertion aid for the rear filter element 14 and the main filter element 16. Axially, between the ramp section 80 and the collar 48, the inner wall surface 86 extends parallel to the axis 22.

[00163] Furthermore, the collar wall 44 comprises four depressions 82, which can be seen, for example, in Figures 12 and 13, and which are arranged along the free edge of the collar wall 44. The depressions 82 deepen, respectively, in the ramp section 80 in the axial direction and extend circumferentially, as well as in the radial direction. Two of the depressions 82 are located, respectively, on one of the long sides 54, at the corresponding transition between the connecting section 62 and the planar curved section 58. The other two depressions 82 are located on the long sides 54, at the transitions between the respective connecting section 62 and the circular curved section 60.

[00164] On the outside of the bottom of housing 32, which is axially facing the receiving space of the filter element 36, two nozzles 84 are arranged. The nozzles extend parallel to axis 22, respectively. The nozzles 84 are located on radially opposite sides of axis 22, adjacent to the short sides 56 of the housing container 12, respectively.

[00165] The rear filter element 14 is designed, for example, as a so-called flat filter element. The rear filter element 14 serves as a secondary filter element. Viewed in the direction of axis 22, the radially outer side of the rear filter element 14 has an elongated oval shape. The course of the radially outer wall surface of the rear filter element 14 corresponds to the elongated oval shape of the radially inner circumferential side of the housing container 12 in the doubly stepped region adjacent to the bottom of the housing 32. On one of its axial faces, the element Petition 870250082959, dated 09 / 15 / 2025, page 49 / 190 The 43 / 66 rear filter element 14 has a seal 88 that extends circumferentially with respect to axis 22. By means of the seal 88, the clean side of the rear filter element 14 is separated from the raw side in the installed state.

[00166] Next, the main filter element 16 will be explained in more detail, particularly with regard to Figures 3, 5 and 16 to 23.

[00167] The main filter element 16 comprises a filter medium body 90, a skeleton 92, an end member 94 and a seal 96.

[00168] Skeleton 92 is shown in detail in Figures 16 to 19. Skeleton 92 as a whole is manufactured as a single piece. For example, skeleton 92 is manufactured as a single injection-molded piece of rigid plastic material.

[00169] The skeleton 92 comprises a central element 98 and a structural element 100.

[00170] The central element 98 serves as a support element on which the filter bellows 134 and 136 rest, which will be explained in more detail below. The central element 98 comprises a plurality of axial supports 102. The axial supports 102 each extend approximately parallel to the axis 22. The axial supports 102 are arranged in a distributed manner around the axis 22. On one axial side of the skeleton 92, the ends of the axial supports 102 located there are connected to each other by a connecting ring 104.

[00171] Viewed in the axial direction, the axial tie rods 102 have an approximately rectangular cross-section. The long sides of the rectangular cross-section of each axial tie rod 102 are aligned, respectively, parallel to a radial direction with respect to axis 22. The circumferential dimensions of the axial tie rods 102 with respect to axis 22, i.e., the expansion of the short sides of the rectangular cross-section of the axial tie rods 102, are constant along their length. Petition 870250082959, dated 09 / 15 / 2025, page 50 / 190 44 / 66 axial. The radial dimensions of the axial tie rods 102 with respect to axis 22, i.e., the expansion of the long sides of the rectangular cross-section of the axial tie rods 102, increase from the end facing the connecting ring 104, viewed in the axial direction. As a whole, the axial tie rods 102 with respect to axis 22 are designed approximately in a wedge shape, viewed in the circumferential direction.

[00172] The radially external sides of the axial supports 102 with respect to axis 22 are inclined towards axis 22, as seen from the structural element 100 towards the connecting ring 104. Thus, a virtual radially external wall surface surrounding the central element 98 and defined by the radially external sides of the axial supports 102 comprises a conical shape that tapers towards the connecting ring 104. The virtual radially internal wall surface defined by the axial supports 102 comprises a shape that tapers from the connecting ring 104 towards the structure 100, as seen axially.

[00173] The connecting ring 104 has an elongated oval cross-section viewed in the axial direction. The connecting ring 104 comprises two parallel coaxial ring sections, with the same circumference, connected to each other by supports that extend axially.

[00174] The ends of the axial supports 102, which are axially opposite to the connecting ring 104, are connected to a radially inner ring 106. The radially inner ring 106 extends, on one side, parallel and, on the other side, coaxially to the connecting ring 104. The radially inner ring 106 extends between the radially inner circumferential sides of the ends of the axial supports 102.

[00175] Between the radially inner ring 106 and the connecting ring 104, there is an intermediate ring 108. The intermediate ring 108 connects the axial tie rods 102 to each other. The intermediate ring 108 extends, by Petition 870250082959, dated 09 / 15 / 2025, page 51 / 190 45 / 66 on one side, parallel and, on the other, coaxially to the connecting ring 104 and the radially inner ring 106. The intermediate ring 108 extends radially from the radially inner circumferential sides of the axial tie rods 102 to the radially outer circumferential sides. The intermediate ring 108 is positioned at an axial distance from the radially inner ring 106 that corresponds to approximately one third of the axial distance between the radially inner ring 106 and the connecting ring 104.

[00176] Two connecting arcs 110 extend on the short sides 56, respectively. Each of the connecting arcs 110 is connected with its free ends to the connecting ring 104. At the curved center, each of the connecting arcs 110 is connected to a central axial support 102. The connecting arcs 110 extend from the connecting ring 104 on the side that is axially facing the structural element 100 at an inclination relative to the axis 22 in the direction of the central axial support 102. On each short side 56, one of the connecting arcs 110 is connected, at an axial distance relative to the connecting ring 104, to the central axial support 102, a distance that is approximately equivalent to about one-fifth of the axial distance between the structural element 100 and the connecting ring 104. This connecting arc 110 connects the connecting ring 104 to the central axial support 102.The other connecting arc 110 on the short side 56 is connected, at an axial distance relative to the connecting ring 104, to the central axial support 102, a distance that corresponds to approximately one quarter of the axial distance between the structural element 100 and the connecting ring 104. This last connecting arc 110 connects the connecting ring 104 to the central axial support 102 and to the two axial supports adjacent to the central axial support 102 on the short sides 56.

[00177] At their wide end in the radial direction, the axial supports 102 comprise, on the outer radial face, a step that rises Petition 870250082959, dated 09 / 15 / 2025, page 52 / 190 46 / 66 in the axial direction. The steps of the axial supports 102 are connected to an outer ring 112.

[00178] The radially outer ring 112 has an elongated oval cross-section. The radially outer ring 112 extends coaxially to the axis 22. The radially outer ring 112 is axially spaced from the radially inner ring 106. This is achieved by means of steps.

[00179] At the ends of the axial supports 102, respective connection openings 114 are made between the outer ring 112 and the radially inner ring 106. The connection openings 114 comprise the axial height of the steps at the ends of the axial supports 102. Through the connection openings 114, axially extending flow spaces 140, which are located between two adjacent axial supports 102, are connected to each other at the level of the radially inner ring 106.

[00180] The radially outer ring 112 is surrounded by a support ring 116 of the structural element 100. The support ring 116 extends coaxially to the shaft 22. The support ring 116 comprises an elongated oval cross-section that differs from the elongated oval cross-section of the radially outer ring 112, the radially inner ring 106, and the connecting ring 104, as will be explained in more detail below.

[00181] The support ring 116 is connected by means of radial supports 118 that extend radially to the radially outer ring 112. The radial supports 118 comprise, on the side facing the support ring 116, a bend of approximately 90°, respectively, in the direction of the connecting ring 104. The ends of the radial supports 118, behind the bend, engage respectively on the side of the support ring 116 that is axially facing away from the connecting ring 104. Petition 870250082959, dated 09 / 15 / 2025, page 53 / 190 47 / 66

[00182] The support ring 116 comprises four support sections 120 which can be seen, for example, in Figures 17 to 19. The reference characters of the support sections 120 are identified with the indices A, B, C and D for better differentiation.

[00183] The sides of the support sections 120, axially facing the connecting ring 104, each form a support surface 122. The reference characters of the support surfaces 122, as well as the reference characters of the respective support sections 120, are provided with the indices A, B, C and D for better differentiation. The support surfaces 122 are planar. The planes of the support surfaces 122 extend perpendicularly to the axis 22, respectively.

[00184] As a whole, the structural element 100 extends radially inward, starting at the support sections 120 and in the direction of an inlet side 226 of the main filter element 16.

[00185] The cross-section of the radially outer circumferential side of the support ring 116 corresponds in its shape to the cross-section of the radially inner circumferential side of the collar wall 44 of the housing container 12. The radially outer circumference of the support ring 116 is slightly smaller than the radially inner circumference of the collar wall 44.

[00186] The support ring 116 comprises a planar curved section 124 on the radial outer wall surface and a circular curved section 126. The planar curved section 124 and the circular curved section 126 are connected to each other by two opposite straight connecting sections 128. The radius of curvature of the planar curved section 124 is greater than the radius of curvature of the circular curved section 126. As a whole, the support ring 116, and therefore also the radial outer wall side of the structural element 100, has no rotational symmetry about the axis 22.

[00187] The central support section 120 b with the support surface Petition 870250082959, dated 09 / 15 / 2025, page 54 / 190 48 / 66 central 122 b extends into the center of the flat curved section 124 between the two outer support sections 120αθ 120c with the corresponding outer support surfaces 122αθ 122c. The support sections 120a and 120c with their respective support surfaces 122αθ 122c extend between the respective straight connection sections 128. The circumferential extension of the two lateral support sections 120αθ 120c corresponds to the circumferential extension of the two lateral contact surfaces 50a and 50c of the housing container 12.

[00188] The support section 120 d with its support surface 122d extends radially opposite the central support section 120b centrally in the circular curved section 126. The circumferential extent of the support section 120oe of the support surface 122dó is greater than the circumferential extent of the contact surface 50d of the housing container 12.

[00189] The support section 120 d with the support surface 122d passes without step in the respective neighboring straight connection sections 128 of the support ring 116.

[00190] The central support surface 120b and the central support surface 122d are located at the same axial height. The external support surface 122a is located on the side of the support ring 116 facing the connecting ring 104 at an axial distance 130, which is identified, for example, in Figure 18, relative to the central support surface 122b. The other external support surface 122c is located on the side of the support ring 116 facing the connecting ring 104 at an axial distance 132 relative to the central support surface 122b. The distance 130 from the external support surface 122a is greater than the distance 132 from the external support surface 122c. The distance 130 from the outer support surface 122a corresponds to the distance 66 from the outer support surface 50a of the housing container 12. The distance 132 from the outer support surface 122c corresponds to the Petition 870250082959, dated 09 / 15 / 2025, page 55 / 190 49 / 66 distance 64 of the external contact surface 50 c of the housing container 12.

[00191] Overall, the side of the support ring 116 that is axially facing the connecting ring 104 in the region of the support sections 120 is complementary to the side of the collar 48 of the housing container 12 that is axially facing away from the bottom of the housing 32.

[00192] The filter medium body 90 comprises, as shown in Figure 3, for example, an outer filter bellows 134 and an inner filter bellows 136. The filter bellows 134 and 136 are each composed of folded filter medium, for example, nonwoven filter.

[00193] The external filter bellows 134 has the shape of a hollow truncated cone with an elongated oval base surface. The external filter bellows 134 is coaxial to the axis 22. The base surface of the external filter bellows 134 is located on the side of the main filter element 16, where the structural element 100 of the skeleton 92 is also located. The radially inner wall of the external filter bellows 134 extends parallel to its radially outer wall. The folds of the external filter bellows 134 extend in the axial direction, respectively. The folds define the respective side wall.

[00194] The radially outer wall surface of the outer filter bellows 134 forms a radially outer wall surface 242 of the filter medium body 90. The radially outer wall surface 242 of the filter medium body 90 comprises, with respect to its course around the axis 22, two curved sections 244 and two straight connecting sections 246. The curved sections 244 are located on radially opposite sides on the short sides 56. The connecting sections 246 are located on radially opposite sides on the long sides 54. The curved sections 244 are connected by the straight connecting sections 246.

[00195] The radial thickness of the external filter bellows 134 is defined Petition 870250082959, dated 09 / 15 / 2025, page 56 / 190 50 / 66 by the height of the fold. The radial thickness of the outer filter bellows 134 corresponds approximately to the radial distance from the support ring 116 of the structural element 100 of the skeleton 92 to the radially outer ring 112 and to the radially outer sides of the axial supports 102.

[00196] The radially external circumference and the radially internal circumference of the external filter bellows 134 decrease respectively in the axial direction away from the structural element 100 of the skeleton 92 towards the connecting ring 104. The external filter bellows 134 tapers, viewed in the axial direction, from the structural element 100 towards the connecting ring 104.

[00197] The radially inner wall side of the external filter bellows 134 is supported on the respective radially outer sides of the axial supports 102, the intermediate ring 108 and the connecting arches 110 of the skeleton 92.

[00198] The internal filter bellows 136 has the shape of a hollow truncated cone with an elongated oval base surface. The internal filter bellows 136 is coaxial to the shaft 22. The base surface of the internal filter bellows 136 is located on the side of the main filter element 16, where the connecting ring 104 of the skeleton 92 is also located. The radially inner wall of the internal filter bellows 136 extends parallel to its radially outer wall. The folds of the internal filter bellows 136 extend respectively in the axial direction. The folds define the respective side wall.

[00199] The radial thickness of the inner filter bellows 136 is defined by the fold height. The radial thickness of the inner filter bellows 136 corresponds approximately to the radial thickness of the outer filter bellows 134.

[00200] The radially outer circumference and the radially inner circumference of the inner filter bellows 136 decrease respectively in the axial direction, moving away from the connecting ring 104 of the skeleton 92 towards the structural element 100. Viewed in the axial direction, the bellows Petition 870250082959, dated 09 / 15 / 2025, page 57 / 190 51 / 66 internal filter 136 tapers from the connection ring 104 towards the structural element 100.

[00201] The radially outer wall side of the inner filter bellows 136 is supported on the respective radially inner sides of the axial supports 102, the intermediate ring 108, the radially inner ring 106 and the connecting arches 110 of the skeleton 92.

[00202] The circumference of the radially outer wall of the inner filter bellows 136 in the base surface region is slightly smaller than the circumference of the radially inner wall of the outer filter bellows 134 in the lid region. The inner filter bellows 136 is arranged coaxially within an interior enclosed by the outer filter bellows 134.

[00203] On the side of the connecting ring 104 of the skeleton 92, the base side of the outer filter bellows 134 is connected by a connecting bend 138 that extends circumferentially and radially to the base side of the inner filter bellows 136.

[00204] Between the radially outer circumferential side of the inner filter bellows 136 and the radially inner circumferential side of the outer filter bellows 134, there are the flow spaces 140. Circumferentially, each of the flow spaces is delimited by one of the two adjacent axial supports 102. The gas to be purified can flow into the flow spaces 140. From the flow spaces 140, the gas to be purified can flow functionally parallel through the outer filter bellows 134, from inside to outside, in the radial direction, and through the inner filter bellows 136, from outside to inside, in the radial direction.

[00205] End member 94 closes an internal element 42 surrounded by the internal filter bellows 136 on the axial end face facing the structural element 100. End member 94 is arranged coaxially to axis 22. End member 94 has an elongated oval cross-section. End member 94 is circumferentially connected with respect to axis 22 to the ring. Petition 870250082959, dated 09 / 15 / 2025, page 58 / 190 52 / 66 radially internal 106 of the skeleton 92 and is supported by the latter. The extremity 94 is made, for example, of elastic material, such as elastomer.

[00206] Next, seal 96, shown in detail in Figure 5, will be explained in more detail. Seal 96 is annular and has an elongated oval extension viewed in the axial direction. Seal 96 is manufactured as a single piece of an elastic material, for example, elastomer. The material of seal 96 is softer than the material from which the skeleton 92 with the structural element 100 is formed.

[00207] Seal 96 comprises a retaining section 144 and a sealing section 146.

[00208] By means of the fastening section 144, the seal 96 is connected to the structural element 100 of the skeleton 92. In this context, the seal 96 with the fastening section 144 can be glued or molded onto the side of the structural element 100 that is axially facing away from the connecting ring 104. The fastening section 144 surrounds, on its respective radially inner side, the radially outer ring 112 of the skeleton 92 and the steps at the ends of the axial supports 102 on their radially outer sides. The structural element 100 is embedded in sections by the material of the seal 96.

[00209] The retaining section 144 leaves exposed the support surfaces 122 on the side of the support ring 116 which is axially facing the connection ring 104.

[00210] The retaining section 144 extends beyond the radially outer ring 112 of the skeleton 92 radially outward and passes into the region of the radially outer side of the support ring 116 into the sealing section 146.

[00211] The sealing section 146 is arranged immediately adjacent, with respect to axis 22, to the radially outer wall surface of the support ring 116 and, therefore, of the structural element 100. Petition 870250082959, dated 09 / 15 / 2025, page 59 / 190 53 / 66 Furthermore, the sealing section 146 is arranged completely radially off, with respect to axis 22, from the radially outer wall surface of the filter medium body 90.

[00212] A free side 150 of the fastening section 144 on the side of the fastening section 144 facing away from the skeletal structural element 92 extends in a plane perpendicular to the axis 22.

[00213] The sealing section 146 is a sealing support. The sealing section 146 extends away from the support ring 116 in the axial direction. The free end of the sealing section 146 extends in a virtual plane perpendicular to the axis 22. The axial free end 148 of the sealing section 146 projects beyond the side 150 of the retaining section 144, facing away from the skeleton 92 in the axial direction. The radially outer circumference of the sealing section 146 in the region of its free end 148 is slightly greater than the radially outer circumference of the sealing section 146 in the region of the support ring 116. Correspondingly, the radially inner circumference of the sealing section 146 in the region of the free end 148 is greater than the radially inner circumference of the sealing section 146 in the region of the transition to the retaining section 144. The sealing section 146 tapers conically in the axial direction from the free end 148 towards the support ring 116.

[00214] The sealing section 146 is radially offset outwards relative to the radially external outer wall surface 242 of the filter medium 90.

[00215] When the seal 96 is relaxed, as illustrated, for example, in Figure 11, an axial distance 188 between the respective section surface 122 of the structural element 100 of the skeleton 92 and the free end 148 of the seal 96 is greater than an axial distance 190 between the corresponding contact surface 50 of the collar 48 of the housing container 12 and a free edge 192 of the collar wall 44. Petition 870250082959, dated 09 / 15 / 2025, page 60 / 190 54 / 66

[00216] In the transition from the retaining section 144 to the sealing section 146, there is a recess 152. The recess 152 extends circumferentially with respect to axis 22 along the radially inner side of the sealing section 146, on the side 150 of the retaining section 144 facing axially away from the support ring 116.

[00217] Viewed in the axial direction, the sealing section 146 has an elongated oval stroke. The stroke of the sealing section 146 corresponds to the stroke of the collar wall 44 of the housing container 12 and of the structural element 100 of the skeleton 92, viewed in the axial direction.

[00218] The sealing section 146 comprises, on the short side 56, a flat curved section 154 and, on the opposite short side 56, a circular curved section 156. The flat curved section 154 has a larger radius of curvature than the circular curved section 156. The flat curved section 154 and the circular curved section 156 are connected on the long sides 54 by a straight connecting section 158, respectively.

[00219] The immersion tube plate 18 will be explained below with the aid of Figures 3 and 4 in more detail.

[00220] The 18-piece immersion tube plate is manufactured as a single piece. The 18-piece immersion tube plate is composed of plastic material, for example, a rigid injection-moldable plastic material. For example, the 18-piece immersion tube plate is produced by an injection molding method.

[00221] The immersion tube plate 18 comprises a plate section 160, a plurality of immersion tubes 162, and a rib 164.

[00222] The plate section 160 extends in a plane perpendicular to axis 22. In the plate section 160, a plurality of immersion tubes 162 are arranged in distribution. Each of the immersion tubes 162 is part of a cyclone separator 166. In Figure 6, for example, some of the cyclone separators 166 are illustrated. The cyclone separators 166 are designed as axial cyclones, for example. A Petition 870250082959, dated 09 / 15 / 2025, page 61 / 190 55 / 66 immersion tube plate 18, together with immersion tubes 162, together with cyclone housing 20, forms the cyclone block 24. The cyclone block 24 comprises a plurality of cyclone separators 166.

[00223] Each of the immersion tubes 162 has approximately the shape of a hollow truncated circular cylinder whose axes extend parallel to axis 22. The base surfaces of the truncated circular cylinders of the immersion tubes 162 are located on the side of the plate section 160. The immersion tubes 162 taper, viewed in the axial direction, away from the plate section 160. The interiors of the immersion tubes 162 serve as inlet openings 168 for the gas to be purified.

[00224] On its radially outer edge, section 160 of plate passes through rib 164. In Figure 4, rib 164 is illustrated in detail. Rib 164 extends circumferentially, contiguously, and coaxially to axis 22. Rib 164 has, as a whole, an approximately V-shaped profile.

[00225] One of the legs of the V-shaped rib 164, hereinafter referred to as the axial leg 170, is connected to the edge of the plate section 160. The axial leg 170 is located on the radially inner side of the rib 164. The axial leg 170 extends, at least in the relaxed state, for example, when the immersion tube plate 18 is not mounted, axially approximately parallel to the axis 22 and circumferentially.

[00226] The other leg of the “V”, hereinafter referred to as ramp leg 172, is connected to the axial leg 170, axially facing away from the plate section 160, on the side thereof. The connecting edge of the axial leg 170 with the ramp leg 172, that is, the closed side of the “V”, is hereinafter referred to as the rib edge 174. The ramp leg 172 is located on the radially outer side of the rib 164. The leg of Petition 870250082959, dated 09 / 15 / 2025, page 62 / 190 56 / 66 ramp 172 extends radially outward at an incline relative to axis 22, away from the edge of rib 174, on the side axially facing the plate section 160. The free end of ramp leg 172 is termed free edge 176.

[00227] The radially outer side of the ramp leg 172 forms a contact surface 178. When the filtering device 10 is mounted, the contact surface 178 is positioned on the sealing section 146 of the seal 96 of the main filter element 16, as will be explained in more detail below. The contact surface 178 extends obliquely to the axis 22 and circumferentially. The contact surface 178 extends at an acute angle of 180° to the axis 22. The angle 180° can vary between 30° and 45°, for example.

[00228] An axial distance 182 between the free edge 176 and the rib edge 174 is approximately the same size as an axial distance between the rib edge 174 and the plate section 160.

[00229] Viewed axially, rib 164 has an elongated oval course. The course of rib 164 corresponds to the course of the collar wall 44 of the housing container 12, of the structural element 100 of the skeleton 92 and of the sealing section 146 of the seal 96, viewed axially.

[00230] Rib 164 comprises on the short side 56 a planar curved section 230 and on the opposite short side 56 a circular curved section 232. The planar curved section 230 has a larger radius of curvature than the circular curved section 232. The planar curved section 230 and the circular curved section 232 are connected on the long sides 54 by a straight connecting section 234, respectively.

[00231] The circumference of the rib edge 174 corresponds to the circumference of the recess 152 of the seal 96. The acute angle 180 of the contact surface 178 is greater than the angle between the surface of Petition 870250082959, dated 09 / 15 / 2025, page 63 / 190 57 / 66 radially internal seal 184 of seal section 146 of seal 96 and shaft 22 when seal 96 is relaxed, for example, in a disassembled state. The axial distance 182 between the edge of rib 174 and the free rim 176 of rib 164 corresponds approximately to an axial distance 186 in seal 96 between the base of recess 152 and the free end 148 of seal section 146.

[00232] Cyclonic housing 20 will be explained in more detail below with the aid of Figures 3, 6 and 7.

[00233] The cyclone housing 20 comprises a fixing structure 194, a plurality of separation chambers 196 and a particle discharge device 198 and a total of four fixing clamps 78.

[00234] The separation chambers 196 are located in a main part 200 of the cyclone housing 20. Each of the separation chambers 196 is correlated with one of the immersion tubes 162 of the immersion tube plate 18. The immersion tubes 162, together with the corresponding separation chamber 196, form one of the cyclone separators 166, respectively. The separation chambers 196 each have an approximately circular cylindrical shape. The axes of the separation chambers 196 extend parallel to axis 22. The axes of the separation chambers 196 extend coaxially to the axes of the corresponding immersion tubes 162 when the device 10 is assembled.

[00235] The particle discharge device 198 is radially arranged on the outside of the main part 200. The separation chambers 196 are connected in fluidic communication to the particle discharge device 198, in a way that is not relevant in this context. In this way, the particles, for example, dust particles, which have been separated from the gaseous medium to be purified in the respective cyclone separator 166, can reach the discharge device of Petition 870250082959, dated 09 / 15 / 2025, page 64 / 190 58 / 66 particles 198.

[00236] The particle discharge device 198 has a discharge opening 202. The discharge opening 202 is closed during regular operation of the filtering device 10. The discharge opening 202 can be opened to discharge the particles collected in the particle discharge device 198. In the mounting orientation of the filtering device 10 illustrated in Figure 1, for example, the particle discharge device 198 is spatially arranged at the bottom of the cyclone housing 20. The discharge opening 202 is therefore spatially oriented downwards.

[00237] The fastening structure 194 is located on an axial face of the end of the main piece 200. On the side of the main piece 200, axially opposed to the fastening structure 194, each of the separation chambers 196 comprises an inlet opening 204 for the gas to be purified. On the side axially facing the fastening structure 194, each of the separation chambers 196 comprises an opening for the corresponding immersion tube 162.

[00238] The fastening structure 194 comprises an outer frame wall 206 which is connected by a collar 208 to the main part 200.

[00239] The outer wall of structure 206 and the collar 208 extend circumferentially in a contiguous manner around axis 22.

[00240] Collar 208 extends radially outward, away from main part 200. The outer wall of structure 206 extends axially outward, away from collar 208, away from main part 200.

[00241] In the region of its free edge, oriented axially away from the main part 200, the outer wall of the structure 206 comprises a guide ramp 210 on the radially inner circumferential side. In the region of the guide ramp 210, the radially inner circumference of the wall Petition 870250082959, dated 09 / 15 / 2025, page 65 / 190 59 / 66 external of structure 206 increases in the axial direction away from the main part 200 towards the free edge. The circumferential stroke of the outer wall of structure 206 around axis 22 corresponds to the circumferential stroke of collar 42 of housing container 12.

[00242] Viewed axially, the outer wall of structure 206 has an elongated oval course. The course of the outer wall of structure 206 corresponds to the course of the collar 44 of the housing container 12, of the structural element 100 of the skeleton 92, of the sealing section 146 of the seal 96 and of the rib 164 of the immersion tube plate 18, viewed axially.

[00243] The outer wall of structure 206 comprises, on the short side 56, a planar curved section 236 and, on the opposite short side 56, a circular curved section 238. The planar curved section 236 has a larger radius of curvature than the circular curved section 238. The planar curved section 236 and the circular curved section 238 are connected on the long sides 54 by a straight connecting section 240, respectively.

[00244] The radially inner circumference of the outer structure wall 206 in the axial region between the guide ramp 210 and the main part 200 is slightly larger than the radially outer circumference of the collar 42 of the housing container 12.

[00245] The radially external side of the main piece 200 has an elongated oval course, viewed in the axial direction. In this context, the curved sections on the short sides 56 have the same radius of curvature. Thus, the elongated oval course of the main piece 200 differs from the elongated oval course of the outer wall of the structure 206. The radially external circumference of the main piece 200 corresponds approximately to the radially external circumference of the section of the main wall 46 of the housing container 12.

[00246] Two of the 78 fastening clamps are located on the side of the flat curved section 236, in the transition region to the section of Petition 870250082959, dated 09 / 15 / 2025, page 66 / 190 60 / 66 corresponding straight connection 240, respectively. The other two fastening clamps 78 are located on the side of the circular curved section 238, in the transition region to the corresponding straight connection section 240, respectively.

[00247] The fastening clamps 78 engage respectively in the region of the outer side of the collar 208 facing axially away from the outer wall of the structure 206. The fastening clamps 78 extend beyond the free edge of the outer wall of the structure 206. The fastening clamps 78 are spring clamps, for example.

[00248] A method for assembling the filtering device 10 will be explained below.

[00249] First, the immersion tube plate 18 is connected to the cyclone housing 20. To do this, the immersion tube plate 18, with the immersion tubes 162 in front, is advanced axially into the fixing structure 194. In this context, it may be necessary to rotate the immersion tube plate 18 and the cyclone housing 20 relative to each other around the axis 22, so that the flat curved section 236 of the outer wall of the structure 206 coincides with the flat curved section 230 of the rib 164, on the one hand, and the circular curved section 238 of the fixing structure 194 and the circular curved section 232 of the rib 164 coincide. After assembly, the immersion tubes 162 are arranged in one of the separation chambers 196, respectively. Subsequently, the immersion tube plate 18 is fixed with screws 28 to the cyclone housing 20.In the event of a future replacement of the main filter element 16 and / or the rear filter element 14 of the filtering device 10, the immersion tube plate 18 can remain in the cyclone housing 20. In this way, the entire cyclone block 24 can be separated from the housing container 12.

[00250] The rear filter element 14, with its side facing away from the main seal 88, is inserted in the axial direction through the Petition 870250082959, dated 09 / 15 / 2025, page 67 / 190 61 / 66 service opening 34 in the housing container 12. In this context, it may be necessary to rotate the housing container 12 and the rear filter element 14 relative to each other around axis 22 so that the long sides 54 of the rear filter element 14 coincide with the long sides 54 of the housing container 12 and the short sides 56 of the rear filter element 14 coincide with the short sides 56 of the housing container 12. The rear filter element 14 is placed in the stepped section of the housing wall 30 axially adjacent to the bottom of the housing 32.

[00251] Subsequently, the main filter element 16, with its axially facing away from the main seal 96, is inserted in the axial direction through the service opening 34 into the interior of the filter element 36 of the housing container 12. For this purpose, it may be necessary to rotate the housing container 12 and the main filter element 16 relative to each other about the axis 22 so that the short side 56 of the main filter element 16 with the flat curved section 124 of the frame element 100 of the skeleton 92 and the flat curved section 154 of the seal 88 coincide with the short side 56 of the housing container 12 with the flat curved section 58 of the collar wall 44.

[00252] The main filter element 16 is inserted axially to the bottom of the housing container 12, so that the support surfaces 122 of the skeleton 92 come into axial contact with the corresponding contact surfaces 50 of the collar 42. This assembly phase is illustrated in Figures 10 and 11. In this assembly phase, the radial surface of the outer wall 212 of the sealing section 146 is spaced radially from the surface of the inner wall 86 of the collar 44 of the collar 42 of the housing container 12. Between the radial surface of the outer wall 212 of the seal 96 and the surface of the inner wall 86 of the collar 42, a radial gap 214 remains. The radial gap Petition 870250082959, dated 09 / 15 / 2025, page 68 / 190 62 / 66 214 extends circumferentially with respect to axis 22 and in the axial direction throughout the axial expansion of the inner wall surface 86. In the assembled state, illustrated in Figures 10 and 11, the free end 148 of the sealing section 146 projects in the axial direction through the free edge 192 of the collar wall 44 of the housing container 12.

[00253] Subsequently, the cyclone block 24 with the dip tube plate 18 in front is pushed in the axial direction over the collar 42 of the housing container 12. In this context, it may be necessary to rotate the housing container 12 and the cyclone block 24 around the axis 22 so that the short side 56 of the wall of the collar 44 with the flat curved section 58 coincides with the short side 56 of the wall of the outer structure 206 of the cyclone container 20 with the flat curved section 236 and, correspondingly, the short side 56 of the wall of the collar 44 with the circular curved section 60 coincides with the short side 56 of the wall of the outer structure 206 with the circular curved section 238.

[00254] By pushing axially, first the free edge 192 of the collar wall 44 is guided along the radially inner side of the guide ramp 210 of the outer frame wall 206 of the cyclonic housing 20 and is thus centered within the fastening frame 194. After further insertion of the immersion tube plate 18, the radially outer side of the ramp leg 172 of the rib 164 slides along the radially inner sealing surface 184 of the seal 96. As the ramp leg 172 has a greater angle of inclination relative to the axis 22 than the radially inner sealing surface 184 of the seal 96, the rib 164 pushes the sealing section 146 radially outward against the inner wall surface 86.

[00255] After insertion, the edge of rib 174 of rib 164 is immersed in the recess 152 of seal 96. Furthermore, the collar 208 of the cyclone housing 20 presses axially against the free end 148 of the sealing section 146. In this way, the sealing section 146 is Petition 870250082959, dated 09 / 15 / 2025, page 69 / 190 63 / 66 axially compressed and deformed. The material of the sealing section 146 yields to axial compression in the radial direction. In this way, an additional increase in radial contact pressure is provided, with which the sealing section 146 is pressed against the inner wall surface 86 of the collar wall 44.

[00256] The free ends of the fastening clamps 78 are hooked behind their respective engagement sections 76, as shown in Figure 1. Then the fastening clamps 78 are secured. In this way, the cyclone block 24 is strongly pushed in the axial direction against the collar 42. The axial movement is limited by the fact that the free edge 192 of the wall of the collar 44 of the housing container 12 is supported in the axial direction on the collar 208 of the cyclone housing 20, as illustrated in Figures 6 and 7.

[00257] In the final mounting position illustrated in Figures 1, 6 and 7, the radially outer wall surface 212 of the seal 96 rests firmly on a contact section 218 on the inner wall surface 86 of the collar 42 of the housing container 12. The contact section 218 begins at an axial distance 220 from the structural element 100 of the skeleton 92, in particular from the respective contact surface 50, and extends in an axial direction to the free edge of the collar wall 44. Between the structural element 100 and the beginning of the contact section 218, a residual gap 222 remains between the radially outer circumferential side of the seal section 146 and the inner wall surface 86 of the collar wall 44. The residual gap 222 extends circumferentially in a contiguous manner and in the axial direction. The residual clearance 222 has a wedge-shaped profile that decreases towards the contact section 218 in the axial direction.

[00258] Each immersion tube 162 comprises an outlet end 248 on its side facing the inlet side 226 of the filter element 16. The outlet end 248 is surrounded by a section of Petition 870250082959, dated 09 / 15 / 2025, page 70 / 190 64 / 66 edge of the immersion tube 250. The edge sections of the immersion tube 250 of the neighboring immersion tubes 162 pass through each other. The edge sections of the immersion tube 250 are formed in the plate section 160 of the immersion tube plate 18.

[00259] The immersion tube edge sections 250 are located, when the filtering device 10 is mounted, as illustrated in Figure 7, for example, at an axial distance 252 from the free end 148 of the circumferential seal 96 radially within the sealing section 146.

[00260] The outlet ends 248 of the immersion tubes 162 are located, viewed axially, beyond the axial free end 148 of the inlet side of the circumferential seal 96. The sections of the edge of the immersion tube 250 that surround the outlet ends 248 and therefore also the outlet ends 248 of the immersion tubes 162, viewed axially, dip behind the free end 148 of the circumferential seal 96 and therefore behind the inlet side end of the main filter element 16.

[00261] Between the immersion tube plate 18 and the housing container 12, a sealing chamber 224 is mounted, in which the sealing section 146 of the seal 96 and part of the retaining section 144 are disposed. The sealing chamber 224 is radially delimited inwards by the rib 164 of the immersion tube plate 18, radially outwards by the inner wall surface 86 of the collar wall 44 of the housing container 12 and axially by the collar 208 of the cyclonic housing 20, which is connected to the immersion tube plate 18.

[00262] For mounting, for example, in a machine that requires purification of the gaseous medium by the filtering device 10, the filtering device 10 is mounted with the short side 56, on which the particle discharge device 198 of the cyclone block 24 is arranged, Petition 870250082959, dated 09 / 15 / 2025, page 71 / 190 65 / 66 spatially at the bottom. In this context, axis 22 is arranged substantially horizontally.

[00263] During the operation of the filtering device 10, the gaseous medium to be purified, for example, air, is drawn in through the inlet opening 204 of the cyclone separators 166. The flow of the gaseous medium within the filtering device 10 is illustrated in Figure 6 by curved arrows.

[00264] A coarse separation of the particles occurs in the cyclone separators 166. The separated particles sink, following the force of gravity, to the particle discharge device 198, where they are collected. The discharge opening 202 of the particle discharge device 198 is opened as needed or during maintenance, and the particle discharge device 198 is emptied.

[00265] The pre-purified gaseous medium passes through the inlet openings 168 of the immersion tubes 162 to the inlet side 226 of the main filter element 16. The inlet side 226 is located on the side of the main filter element 16, where the seal 96 is also located.

[00266] The gaseous medium to be purified flows into the flow spaces 140 between the outer filter bellows 134 and the inner filter bellows 136. In doing so, the gaseous medium is circumferentially distributed, flowing through the connecting openings 114. From the flow spaces 140, the gaseous medium to be purified flows radially through the outer filter bellows 134 from the inside to the outside, is subsequently purified by it, and reaches an annular space that radially surrounds the main filter element 16 outwards. Functionally in parallel, the gaseous medium to be purified flows radially through the inner filter bellows 136, from the outside to the inside, is subsequently purified by it, and reaches the interior of the element 142.

[00267] The purified gaseous medium of the annular space in the second Petition 870250082959, dated 09 / 15 / 2025, page 72 / 190 66 / 66 stage and the gaseous medium from inside the purified element 142 in the second stage, reach the outlet side 228 of the main filter element 16. The outlet side 228 of the main filter element 16 is located on the side that is axially facing away from the inlet side 226.

[00268] From outlet side 228, the purified gas medium from the second stage flows to the subsequent filter element 14 and is further purified by the latter.

[00269] The gaseous medium that has been purified in total in three stages exits the filtering device 10 through the outlet opening 40 of the filter housing 26. From here, the purified gaseous medium is drawn into the corresponding components of the machine. Petition 870250082959, dated 09 / 15 / 2025, page 73 / 190

Claims

1 / 12 CLAIMS 1. A filtering device (10) for gaseous media, in particular for air, - comprising a filter housing (26) with at least one inlet opening (168) for the gaseous medium to be purified and at least one outlet opening (40) for the purified gaseous medium, - wherein in the filter housing (26), in relation to the gas flow between at least one inlet opening (168) and at least one outlet opening (40), at least one filter element (16), comprising at least one filter medium body (90), is arranged so as to separate a crude side correlated with the inlet opening (168) from a clean side correlated with the outlet opening (40), - wherein the filter housing (26) comprises a first part of the housing (12) in which at least one outlet opening (40) is arranged and comprising at least one receiving space for the filter element (36), in which the at least one filter element (16) is provided,- and wherein the filter housing (26) comprises a second housing part (18), in which at least one inlet opening (168) is disposed and which comprises at least parts (162) of at least one cyclone separator (166), - wherein the second housing part (18) closes a service opening (34) of the first housing part (12) and the first and second housing parts (12, 18) are removablely connected to each other and separable from each other in order to remove at least one filter element (16) through the service opening (34) of the first housing part (12), characterized in that at least one filter element (16), on an inlet side (226) facing the second housing part (18), comprises a seal (96) that extends circumferentially around Petition 870250082959, dated 15 / 09 / 2025, page. 74 / 190 2 / 12 of a virtual axis (22),comprising a sealing section (146) that acts as a seal at least partially radially in relation to the shaft (22) and extending circumferentially around the shaft (22), wherein, in relation to the shaft (22), a radially external circumferential side (212) of the sealing section (146) rests firmly, in relation to the shaft (22), on a radially internal inner wall surface (86) of the first part of the housing (12), a rib (164), extending circumferentially at least partially around the shaft (22) and projecting away from the second part of the housing (18) with at least one directional component in the axial direction in relation to the shaft (22), exerts a contact pressure on the circumferential seal (96) in order to press the circumferential sealing section (146) that acts as a seal at least partially radially against the inner wall surface (86) of the first part of the housing (12).

2. Filtering device, according to claim 1, characterized in that the rib (164) supports the circumferential sealing section (146) which acts as a seal at least partially radially on a radially inner circumferential side (184) of the sealing section (146), in particular on a radially inner circumferential side (184) of the sealing section (146) positioned radially opposite to the inner wall surface (86) of the first part of the housing (12).

3. Filtering device, according to any one of claims 1 or 2, characterized in that the rib (164) contacts the circumferential seal (96) on an axial end face (150) relative to the shaft (22), which is facing the second part of the housing (18), with a directional component of the contact pressure acting in the axial direction relative to the shaft (22).

4. Filtering device, according to any of the previous claims, characterized in that the rib (164) is configured at least in sections to have a ramp shape, and / or a contact surface (178) of the rib (164) facing the radially inner circumferential side (184) of the circumferential sealing section that acts as a seal at least partially radially (146) is positioned at an acute angle (180) relative to the axis (22).

5. Filtering device, according to any of the preceding claims, characterized in that the circumferential sealing section that acts as a seal at least partially radially (146) is at least in sections radially displaced outwards relative to, relative to the axis (22), a radially external outer wall surface (242) of the filter medium body (90), and / or the circumferential sealing section (146) that acts as a seal at least partially radially projects axially beyond the inlet side (226) of the filter medium body (90) at least in sections.

6. Filtering device, according to any of the preceding claims, characterized in that the filtering device (10) comprises a cyclone block (24) with a plurality of cyclone separators (166), wherein the cyclone block (24) comprises an immersion tube plate (18), which comprises a plurality of immersion tubes (162), as a second housing part (18) of the filter housing (26), and wherein the circumferential rib (164) is formed in the immersion tube plate (18), Petition 870250082959, dated 15 / 09 / 2025, p.76 / 190 4 / 12 and / or at least one inlet opening (168) is disposed in one or more parts of at least one cyclone separator (166), in particular in an immersion tube (162) of at least one cyclone separator (166), and / or the second part of the housing (18) comprises parts of a cyclone block (24) comprising a plurality of cyclone separators (166), and / or the second part of the housing (18) comprises or is an immersion tube plate (18) with at least one immersion tube (162) of a cyclone separator (166), and / or the second part of the housing (18) comprises a plurality of immersion tubes (162) of corresponding cyclone separators (166), and / or the second part of the housing (18) is disposed between the first part of the housing (12) and a cyclone housing (20) of a cyclone block (24) to which belongs to at least one cyclone separator (166).

7. Filtering device, according to any of the preceding claims, characterized in that an axial end of the inlet side (148) of the circumferential seal (96), viewed in a direction axial to the axis (22), projects beyond a free end (176) of the rib (164) of the second part of the housing (18), and / or the rib (164), viewed in a direction axial to the axis (22), Petition 870250082959, dated 09 / 15 / 2025, p.77 / 190 5 / 12 projects beyond a free end (148) of the circumferential seal (96), in particular of at least one sealing section (146), and / or the rib (164) is immersed in a recess (152) of the circumferential seal (96) which is open on its side axially facing the inlet side (226) relative to the axis (22), and / or the second part of the housing (18) comprises at least one immersion tube (162) of at least one cyclone separator (166) comprising an outlet end (248) on its side facing the inlet side (226) of at least one filter element (16), which is surrounded at least in sections by an edge section of the immersion tube (250), wherein the edge section of the immersion tube (250), when the filtering device (10) is mounted, is located radially within the sealing section. (146) at an axial distance (252) from the free end (148) of the circumferential seal (96).

8. Filtering device, according to any of the preceding claims, characterized in that the first part of the housing (12) comprises a radially projected collar (42) that extends at least partially circumferentially and that provides at least one axial contact surface (50a, 50b, 50c) on which at least one radially projected support section (120a, 120b, 120c, 120d) of the filter element (16) is supported.

9. Filtering device, according to claim 8, characterized in that the collar (42) comprises at least two axial contact surfaces (50a, 50b, 50c, 50d), in particular four axial contact surfaces (50a, 50b, 50c, 50d), which are located at different axial heights, and / or the collar (42) comprises at least two collar sections, Petition 870250082959, dated 15 / 09 / 2025, page 78 / 190 6 / 12 in particular four collar sections, with respective contact surfaces (50a, 50b, 50c, 50d) each extending partially circumferentially around the axis (22).

10. Filtering device, according to any one of claims 8 or 9, characterized in that a contact region (218) of the sealing section (146), in which the sealing section (146) radially contacts the inner wall surface (86) of the first part of the housing (12) in a sealing manner, is disposed at an axial distance (220) from at least one axial contact surface (50a, 50b, 50c, 50d) of the collar (42).

11. Filtering device, according to any of the preceding claims, characterized in that the first part of the housing (12) and the second part of the housing (18) form a sealing chamber (224) in which the circumferential sealing section (146) acting at least partially radially is received, wherein the sealing chamber (224) is radially delimited inwardly by the rib (164) of the second part of the housing (18), radially outwardly by the inner wall surface (86) of the first part of the housing (12) and axially by a collar (208) connected to the second part of the housing (18), in particular by a collar (208) of another part (20) connected to the second part of the housing (18).

12. Filtering device, according to any of the preceding claims, characterized in that the circumferential seal (96) is bounded at an axial end facing away from the second part of the housing (18) by a structural element (100) that at least partially surrounds the shaft (22) and is connected to the filtering medium body (90), wherein the structural element (100), in particular a surface of the structural element (100), at least in sections is exposed, and wherein the structural element (100), in particular at least one exposed section of the structural element Petition 870250082959, dated 09 / 15 / 2025, p. 79 / 190 7 / 12 (100), forms at least partially a radially projected support section (120a, 120b, 120c, 120d) of the filter element (16), which is supported on an axial contact surface (50a, 50b, 50c, 50d) of a radially projected collar (42) of the first part of the housing (12).

13. Filtering device, according to claim 12, characterized in that the structural element (100), starting at at least one exposed section, extends at least in sections in the axial direction towards the inlet side (226) and / or radially inward, and / or the structural element (100) is embedded at least in sections by the circumferential sealing material (96).

14. Filtering device, according to any of the preceding claims, characterized in that in a state of the filtering device (10) in which at least one filter element (16) is disposed in at least one filter element receiving space (36) and the second housing part (18) is separated from the first housing part (12), a radial gap (214) is present between the inner wall surface (86) of the first housing part (12) and the radially outer circumferential side of at least one partially radially acting circumferential sealing section (146).

15. Filtering device, according to any of the preceding claims, characterized in that the filtering medium body (90) comprises a cross-sectional form comprising at least two curved sides (56) connected to each other in particular by two straight sides (54), and / or the filtering medium body (90) comprises a section of Petition 870250082959, dated 09 / 15 / 2025, page. 80 / 190 8 / 12 radially external filter medium (134) and a radially internal filter medium section (136), each of which, with respect to the axis (22), are circumferentially contiguous, wherein the radially internal filter medium section (136) is disposed within the radially external filter medium section (134), and / or an external wall of the filter medium body (90), in particular of a radially external section of the filter medium (134) of the filter medium body (90), comprises an elongated oval cross-section, and / or an internal wall of the filter medium body (90),in particular of a radially internal section of the filter medium (136) of the filter medium body (90), comprising an elongated oval cross-section, and / or an external wall of the filter medium body (90), in particular of a radially external section of the filter medium (134) of the filter medium body (90), viewed from the inlet side (226) in the direction of the axis (22), tapers, in particular tapers conically, and / or an internal wall of the filter medium body (90), in particular of a radially internal section of the filter medium (136) of the filter medium body (90), viewed from the outlet side in the direction of the axis (22), tapers, in particular tapers conically.

16. Filtering device, according to any of the preceding claims, characterized in that at least one section of filter medium (134) of the filter medium body (90), in particular a radially external filter medium section (134) of the filter medium body (90), can flow in the radial direction from the inside to the outside, Petition 870250082959, dated 09 / 15 / 2025, page 81 / 190 9 / 12 and / or at least one section of filter medium (136) of the filter medium body (90), in particular a radially internal filter medium section (136) of the filter medium body (90), can flow in the radial direction from the outside to the inside.

17. A filtering device, according to any of the preceding claims, characterized in that at least one filtering medium body (90) comprises at least two filtering bellows (134, 136), in particular an inner filtering bellows (136) and an outer filtering bellows (134), in particular at least two folded filtering bellows, which extend at least partially around the axis (22) and can be traversed in parallel by the gaseous medium to be purified, and / or an inner filtering bellows (136) of at least one filtering medium body (90) is disposed in an interior enclosed by an outer filtering bellows (134) of at least one filtering medium body (90), and / or at least one filtering medium body (90) comprises at least one filtering bellows (134, 136), in particular an inner filtering bellows (136) and / or a bellows external filter (134), which comprises an inclination relative to the axis (22).

18. Filtering device, according to any of the preceding claims, characterized in that the filtering device (10) comprises at least one additional filtering element (14), in particular a secondary filtering element (14), which is fluidically arranged downstream of at least one filtering element (16) with the circumferential seal (96), in particular a primary filtering element (16).

19. Filter element (16) for a filtering device Petition 870250082959, dated 15 / 09 / 2025, page 82 / 190 10 / 12 (10) for gaseous media, in particular for air, in particular for a filtering device (10) according to the invention, comprising at least one filtering medium body (90), - wherein the filtering device (10) comprises a filter housing (26) with at least one inlet opening (166) and at least one outlet opening (40), - wherein the filter element (16) can be received in the filter housing (26) between the inlet opening (168) and the outlet opening (40) to separate a crude side correlated with at least one inlet opening (168) from a clean side correlated with at least one outlet opening (40),- and wherein the filter housing (26) comprises a first housing part (12) in which the outlet opening (40) is disposed and which comprises at least one receiving space for the filter element (36) in which at least one filter element (16) may be disposed, - and wherein the filter housing (26) comprises a second housing part (18) in which the inlet opening (168) is disposed and which comprises at least parts of at least one cyclone separator (166), - wherein the second housing part (18) closes a service opening (34) of the first housing part (12) and the first housing part (12) and the second housing part (18) are removablely connected to each other and separable from each other in order to remove at least one filter element (16) through the service opening (34) of the first housing part (12), characterized in that at least one filter element (16),on one side of the entrance (226) which may face the second part of the accommodation (18), comprises a fence (96) which extends circumferentially Petition 870250082959, dated 09 / 15 / 2025, page. 83 / 190 11 / 12 mind around a virtual axis (22), comprising a sealing section (146) that acts as a seal at least partially radially in relation to the axis (22) and extending circumferentially around the axis (22), wherein a circumferential side of the sealing section (146) oriented radially outwards in relation to the axis (22) can be firmly contacted, in relation to the axis (22), on a radially inner wall surface (86) of the first part of the housing (12), by a rib (164), extending at least partially circumferentially around the axis (22) and projecting from the second part of the housing (18) with at least one directional component in the axial direction,A contact pressure can be applied to the circumferential seal (96) to press the circumferential seal section (146), which is capable of acting as a seal at least partially radially, against the inner wall surface (86) of the first part of the housing (12).

20. Use of a filter element (16), comprising at least one filter medium body (90), in a filtering device (10) for gaseous media, in particular, as defined in any one of claims 1 to 19, characterized in that the filter element (16) comprises a circumferential seal (96) on an inlet side (226) facing the second part of the housing (18) of the filtering device (10), which comprises a circumferential seal section (146) acting in a sealing manner at least partially radially, which, with respect to the axis (22), with a radially external circumferential side resting firmly, with respect to the axis (22), on a radially internal inner wall surface (86) of the first part of the housing (12), where a rib at least partially circumferential (164) projecting from the second part of the housing (18) with at least one component Petition 870250082959, from 15 / 09 / 2025, page.84 / 190 12 / 12 directional in the axial direction exerts a contact pressure on the circumferential seal (96) in order to press the circumferential seal section (146) that acts in a sealing manner at least partially radially against the surface of the inner wall (86) of the first part of the housing (12).

21. Method for assembling a filtering device (10) for gaseous media, in particular a filtering device, as defined in any one of claims 1 to 19, in which at least one filter element (16) is inserted through a service opening (34) into a filter element receiving space (36) of a first housing part (12), comprising at least one outlet opening (40) for purified gaseous media, of a filter housing (26) of the filtering device (10) and subsequently the service opening (34) is closed by a second housing part (18) of the filter housing (26), comprising at least one inlet opening (168) for the gaseous media to be purified and at least parts of at least one cyclone separator (166),characterized in that a seal (96) extending circumferentially around a virtual axis (22) on an inlet side (226) of at least one filter element (16) facing the second part of the housing (18) is pressed by a rib (164), projecting away from the second part of the housing (18) with at least one directional component in the axial direction relative to the axis (22) and encircling the axis (22) at least partially, acting as a seal at least partially radially, relative to the axis (22), against a radially internal inner wall surface (86) of the first part of the housing (12). Petition 870250082959, dated 15 / 09 / 2025, p. 85 / 190,

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