Abstract: In a filter element (10) having a filter bellows (11) which is covered at each end by an end disk (13, 14), the end disks (13, 14) are each provided with at least one coupling element for coupling to a filter housing (20) and connected to one another via at least one central tube (12) spanning the filter bellows (11). Alternatively, a central tube which runs right through and onto which end disks and filter bellows are pushed and which is configured at its ends for coupling with parts of the housing is present.

Abstract: A filter element (1) for fluid filtration has a hollow-cylindrical filter medium (2) folded in a star shape, an outlet-side end plate (3) and a second end plate (4), a hollow-cylindrical supporting mesh (5) disposed in the interior (6) of the filter medium, wherein at the outlet-side end of the filter element, the supporting mesh has a connecting region (11) in which the supporting mesh (5) is provided with a coupling element (7). In the connecting region (7) the supporting mesh (5) includes a radially outwardly projecting collar (8) protruding beyond the outlet-side end face (9) of the filter medium. The outlet-side end plate (3) encloses the outlet-side end face (9) of the filter medium (2) and the collar (8) and has an annular axial seal (10).

Abstract: In a filter element (10) having a filter bellows (11) which is covered at each end by an end disk (13, 14), the end disks (13, 14) are each provided with at least one coupling element for coupling to a filter housing (20) and connected to one another via at least one central tube (12) spanning the filter bellows (11). Alternatively, a central tube which runs right through and onto which end disks and filter bellows are pushed and which is configured at its ends for coupling with parts of the housing is present.

Abstract: The invention relates to a filter device (10), in particular for filtering intake air of an internal combustion engine. The filter device (10) comprises a separator that is embodied in particular as a cyclone preseparator (26), moreover a main filter element (36) exchangeably arranged in a housing compartment (68) of the filter housing (12), as well as a secondary filter element (38) that in the flow direction of the fluid to be cleaned is arranged downstream. The housing compartment (68), for facilitating premounting of the main filter element (36) therein, comprises insertion stays (64). The main filter element (36) is embodied in particular as a double bellows filter, comprising a first radially inwardly positioned filter bellows (40) and a second radially outwardly positioned filter bellows (42) surrounding it.

Abstract: A filter is disclosed that includes a filter cup, a filter insert inserted into the filter cup and having a substantially cylindrical shape and a terminal disk arranged at an end face of the filter insert and connected to an end of the filter cup. The terminal disk includes a circumferential rim configured to engage the end of the filter cup and is provided with locking means that positive-lockingly connects the terminal disk and the filter cup.

Abstract: To be able to insert a cylindrical filter element (10) which is joined at each end to an end disk (14) quickly into a housing element (40) in a filter unit (100) and connect it firmly, a screw connection having conical threads (16, 46) on the filter element (10) and on the bottom of the housing (41) is provided.

Abstract: The invention relates to a filter device (10), in particular for filtering intake air of an internal combustion engine. The filter device (10) comprises a separator that is embodied in particular as a cyclone preseparator (26), moreover a main filter element (36) exchangeably arranged in a housing compartment (68) of the filter housing (12), as well as a secondary filter element (38) that in the flow direction of the fluid to be cleaned is arranged downstream. The housing compartment (68), for facilitating premounting of the main filter element (36) therein, comprises insertion stays (64). The main filter element (36) is embodied in particular as a double bellows filter, comprising a first radially inwardly positioned filter bellows (40) and a second radially outwardly positioned filter bellows (42) surrounding it.

Abstract: To be able to insert a cylindrical filter element (10) which is joined at each end to an end disk (14) quickly into a housing element (40) in a filter unit (100) and connect it firmly, a screw connection having conical threads (16, 46) on the filter element (10) and on the bottom of the housing (41) is provided.

Abstract: In a filter element (10) having a filter bellows (11) which is covered at each end by an end disk (13, 14), the end disks (13, 14) are each provided with at least one coupling element for coupling to a filter housing (20) and connected to one another via at least one central tube (12) spanning the filter bellows (11). Alternatively, a central tube which runs right through and onto which end disks and filter bellows are pushed and which is configured at its ends for coupling with parts of the housing is present.

Abstract: A filter is disclosed that includes a filter cup, a filter insert inserted into the filter cup and having a substantially cylindrical shape and a terminal disk arranged at an end face of the filter insert and connected to an end of the filter cup. The terminal disk includes a circumferential rim configured to engage the end of the filter cup and is provided with locking means that positive-lockingly connects the terminal disk and the filter cup.