Abstract: In order to provide a seal function and a protection of the sealing surfaces for an air filter element (10) comprising a cylindrical tubular filter bellows (11) that is closed off at the end faces by a terminal disk (20, 20?), respectively, which each have at least one annular seal (22) or an annular seal section of a sealing member, the annular seal (22) is covered by a manually removable cover ring and/or a cover disk (30?).

Abstract: The invention describes a self-powered centrifugal separator comprising a base, a rotor mounted on an operably substantially vertical axis for rotation thereabout by reaction to fluid emission from rotor nozzles therein, a housing mounted on the base and enclosing the rotor, a sump formed in the base below the rotor, a fluid passageway through the base extending from an inlet port to an outlet port and including a diversion port to supply fluid to the interior of the rotor by way of the rotation axis, a drain passage in the base for draining fluid from the sump to the fluid passageway, and a venturi arrangement provided in the fluid passageway in the base to develop suction pressure to draw fluid from the drainage passage into the fluid passageway, whereas a spring loaded valve body is provided in the fluid passageway, said body being configured and arranged to shut off supply of fluid to the interior of the rotor when pressure of fluid entering the inlet port falls below a predetermined minimum pressure valu

Abstract: To be able to achieve better compensation for length changes in a cylindrical filter element (100) having a cylindrical filter bellows (11) which is closed off at each of its end faces (1, 2) with an end disk (20), the filter bellows (11) which encloses a central tube (12) and an end disk (20) which serves as fixed bearing and is fixed relative to the central tube (12) or is connected with this is provided, as is a second end disk (20) is configured as movable bearing, with at least the second end disk (20) having an annular shape and being connected via an internal radial ring seal (22) to the central tube (12).

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: 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: A shuttle valve (30) is provided in the axial bore (19) of a stationary spindle (11) through which fluid is supplied to a rotor (12) of a centrifugal separator to close off the fluid outlets (23, 24) to the rotor (12) automatically upon removal of the cap (27) or cover assembly (20) in the event that fluid supply has not been switched off.

Abstract: The invention describes a self-powered centrifugal separator comprising a base, a rotor mounted on an operably substantially vertical axis for rotation thereabout by reaction to fluid emission from rotor nozzles therein, a housing mounted on the base and enclosing the rotor, a sump formed in the base below the rotor, a fluid passageway through the base extending from an inlet port to an outlet port and including a diversion port to supply fluid to the interior of the rotor by way of the rotation axis, a drain passage in the base for draining fluid from the sump to the fluid passageway, and a venturi arrangement provided in the fluid passageway in the base to develop suction pressure to draw fluid from the drainage passage into the fluid passageway, whereas a spring loaded valve body is provided in the fluid passageway, said body being configured and arranged to shut off supply of fluid to the interior of the rotor when pressure of fluid entering the inlet port falls below a predetermined minimum pressure valu

Abstract: A separation cone (30) is mounted into the interior chamber of a centrifugal separator rotor (10), which comprises a cover (14) releasably connected to a base (16), in order to provide a frusto-conical wall subdividing the chamber into upper and lower regions. This slows the passage of fluid from the upper to the lower region, which takes place via openings (24) and/or via a gap between the inner rim (32) of the cone (30) and the axial inlet tube (12). The separation cone (30) is connected to the cover (14) by a releasable snap fit arrangement, such as by deflectable tabs (38) around the periphery of the separation cone (30) engaging into a groove (15) around the interior surface adjacent a lower edge of the cover (14). This allows there to be a predetermined sequence of servicing operations and ensures that the separation cone (30) will reliably stay with the cover (14) when the cover is removed.

Abstract: The invention concerns a filter housing (1), in particular of an air filter for motor vehicles, that extends axially along a longitudinal axis (2) and comprises two detachably connected housing parts (3, 4). A locking connection (5) acting in the direction of the longitudinal axis (2) is provided between the two housing parts (3, 4), wherein the locking connection (5) in at least one rotational direction (6) of the first housing part (3) about the longitudinal axis (2) relative to the second housing part (4) can be brought into a position in which the housing parts (3, 4) are detachable in the axial direction.

Abstract: A filter system for a fluid having a cup-shaped housing releasably connected to a connecting head and a filter element arranged in the housing, in which the releasable connection is formed by at least one connecting element formed on the connecting head which engages a connecting element formed by a part of the filter element in combination with a part of the cup-shaped housing such that the connection between the housing and the receiving head can only be produced if a proper filter element is installed in the housing.

Abstract: An air filter connecting unit having a connecting flange (11) and a connecting nipple (20) that can be coupled to the connecting flange via a snap connection. The connecting flange (11) has a round receptacle (13) provided with an inside thread flight (12) that is subdivided into individual, resilient, curved thread flight segments (12.1, 12.2, . . . , 12.n). The associated connecting nipple (20) has a generally cylindrical construction and an advancing thread (22) which ends in a free-running groove (23) on the connecting nipple.

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: A liquid filter, especially oil filter for an internal combustion engine, having a cup-shaped housing with a liquid inlet and a liquid outlet, a filter element arranged with a seal between the inlet and outlet, and a one-piece barrier membrane arranged in the area of the opening of the cup-shaped housing such that the liquid inlet and/or the liquid outlet can be closed by the barrier membrane.

Abstract: To be able to achieve better compensation for length changes in a cylindrical filter element (100) having a cylindrical filter bellows (11) which is closed off at each of its end faces (1, 2) with an end disk (20), the filter bellows (11) which encloses a central tube (12) and an end disk (20) which serves as fixed bearing and is fixed relative to the central tube (12) or is connected with this is provided, as is a second end disk (20) is configured as movable bearing, with at least the second end disk (20) having an annular shape and being connected via an internal radial ring seal (22) to the central tube (12).

Abstract: In order to be able to adjust in a simple and inexpensive way in the manufacture of an air filter housing (10) for a cylindrical filter element, the housing comprising a tangentially adjoining unfiltered air socket (1) and an outlet socket (2) and comprising a footstep bearing element (3) formed integrally on the air filter housing, the angular position of the unfiltered air socket (1) relative to a support and fastening plane predetermined by the footstep bearing elements (3), it is provided that the air filter housing is divided into a central housing element (4), on which the footstep bearing element (3) is integrally formed, and an intake element (5), on which the unfiltered air socket (1) is integrally formed, wherein the central housing element (4) and the intake element (5) are connected to one another by a rotationally positionable connection.

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 apparatus including a housing (2) and a filter insert (4), with an inlet opening formed on the housing (2) and an outlet fitting (6) mounted on a housing wall. The outlet fitting (6) has a contact face (7) for contact with the housing (2) and is provided with a tubular segment (13), which protrudes through an opening (9) of the housing, and a mounting element (22) is attached to the tubular segment (13) such that a region (10) of the housing (2) surrounding the opening (9) is clamped between the contact face (7) of the outlet fitting (6) and the mounting element (22).

Abstract: A filter closure system has a connecting end at an end face of a cylindrical filter housing and a connecting head matching the connecting end. The connecting end is insertable axially into the connecting head and connected positive-lockingly to the connecting head by an insertion-rotation movement. Connecting end and connecting head have a bayonet connection with receiving slots or receiving projections and matching insertion projections. The matching insertion projections engage the receiving slots or projections when the bayonet connection is closed. The receiving slots or projections and the insertion projections each are arranged substantially in a perpendicular plane relative to the insertion direction. The receiving slots or projections are elongate and circumferentially do not extend completely around but are segmented. The receiving slots or projections are sequentially arranged in the insertion direction and are substantially parallel to one another.

Abstract: A filter element comprising a filter medium which extends through an axial length between an end face at a clean air end and an end face at an unfiltered air end such that the filter medium separates an unfiltered air end of the filter element from a clean air end, in which the filter medium is circumferentially surrounded by a jacket and attached in a sealed manner to the jacket, and in which contours for securing the filter element in a filter housing are arranged on the jacket of the filter element.

Abstract: A filter device having a filter element which has at least one end disk (19) having axially extending elevations (20) configured in the form of at least one recognizable character, in which the elevations correspond in configuration to passages (35-37) through an intermediate element (23). Behind the intermediate element there is an element (24) which faces the housing (10) of the filter unit and is provided with axially projecting appendages (30, 31) which extend into the passages (35-37) of the intermediate element (23). Intermediate element (23) and element (24) are axially movably mounted on a central mandrel (17), and the appendages (30, 31) can be pushed axially by the filter element (12) out of the passages (35-27) of the intermediate element (23) so that intermediate element (23) and element (24) can rotate relative to each other and move axially and the filter element can be moved to its fully installed position.