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 head with a connecting web and further has a connecting end at an end face of a filter housing. The connecting head and the connecting end are matched to one another. The connecting end is pushed onto the connecting head in a mounting direction into a mounted state on the connecting head so as provide a seal-tight connection in the mounted state. The connecting end and the connecting web that extends in the mounting direction are provided with a micro toothing. When pushing the connecting end onto the connecting head in the mounting direction, the micro toothing connects by positive locking action the connecting end and connecting head with one another. The engagement of the micro toothing between connecting end and connecting head is realized along a flank of connecting web and connecting end which flank extends in the mounting direction.

Abstract: A filter assembly (10) including a housing (11) which is used to receive a filter medium and is closed by a lid or cover (14) in a sealed manner. The cover (14) is fixed by fixing elements (15) to an axial end face of the housing (11), and a seal is arranged between the cover (14) and the housing (11). Fixing contours (24) are provided on the outer peripheral surfaces of the housing (11) on the front side of the assembly. The fixing element (15) is arranged on the outer front side of the cover (14) so as to be pivotable such that the fixing element (15) can be displaced essentially parallel to the front side of the cover (14). When positioned parallel to the front side of the cover, the fixing element (15) creates a positively locking connection between the cover (14) and the housing (11), and when in the opened and pivoted state, the fixing element (15) forms a grip or handle for handling the cover (14).

Abstract: A housing, particularly a filter housing, especially an air filter housing, including first and second housing sections which can be releasably connected by a relative rotational movement between the sections. Latching members corresponding to one another are disposed on each of the housing sections, such that a first number of latching members has means for securing the connection between the housing sections, and a second number of latching members has means for adjusting the torque required to unlock the housing sections and means for adjusting the torque required to lock the housing sections.

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: An oil filter for an internal combustion engine with a cup-shaped housing that is releasably connectable to a receiving head. The housing has a first interlocking element that extends across at least a portion of the outer circumference of the housing and is interrupted by at least one axially extending recess. The filter element has a liquid-tight canister provided on its outer surface with second interlocking elements, which fit into the recesses of corresponding first interlocking elements when the filter element is installed in the housing.

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: 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 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: A filter assembly (10) including a housing (11) which is used to receive a filter medium and is closed by a lid or cover (14) in a sealed manner. The cover (14) is fixed by fixing elements (15) to an axial end face of the housing (11), and a seal is arranged between the cover (14) and the housing (11). Fixing contours (24) are provided on the outer peripheral surfaces of the housing (11) on the front side of the assembly. The fixing element (15) is arranged on the outer front side of the cover (14) so as to be pivotable such that the fixing element (15) can be displaced essentially parallel to the front side of the cover (14). When positioned parallel to the front side of the cover, the fixing element (15) creates a positively locking connection between the cover (14) and the housing (11), and when in the opened and pivoted state, the fixing element (15) forms a grip or handle for handling the cover (14).

Abstract: A compact filter element with a large filter surface area having inner and outer rings of filter material with an annular space between them, such that fluid to be filtered can be introduced into the annular space between the rings of filter material and a portion thereof can flow through the outer ring of filter material to the periphery of the filter element and another portion thereof can flow through the inner ring of filter material to the center of the filter element; at least one fluid-permeable support member for the filter material, and at least one end disk on an axial end face of the filter element affixed to the rings of filter material in a sealed manner, in which the end disk has a centrally arranged inlet opening for the fluid to be filtered and one or more radially extending distributor channels leading from the central inlet opening to at least one eccentrically arranged outlet opening which opens into the annular space between the rings of filter material to admit fluid to be filtered to the

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: A filter suitable for use, for example, as an air filter for filtering the combustion air for internal combustion engines, having a substantially hollow cylindrical filter insert, preferably made of a pleated or fan folded filter medium, and end disks disposed at the axial end faces. A plurality of spacing contours distributed around the circumference and protruding radially beyond the projected end face are disposed in the region of one end disk in such a way that the spacing contours contact an inner housing wall of an associated filter housing when the filter insert is installed.

Abstract: A filter system for a fluid, particularly a liquid filter, especially an oil filter for an internal combustion engine, having a receiving head, a cup-shaped housing releasably connectable to the receiving head, and a replaceable filter element disposed the cup-shaped housing, in which the filter element has a liquid-tight casing which is received in the interior of the cup-shaped housing.

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: An oil filter for an internal combustion engine with a cup-shaped housing that is releasably connectable to a receiving head. The housing has a first interlocking element that extends across at least a portion of the outer circumference of the housing and is interrupted by at least one axially extending recess. The filter element has a liquid-tight canister provided on its outer surface with second interlocking elements, which fit into the recesses of corresponding first interlocking elements when the filter element is installed in the housing.

Abstract: A housing, particularly a filter housing, especially an air filter housing, including first and second housing sections which can be releasably connected by a relative rotational movement between the sections. Latching members corresponding to one another are disposed on each of the housing sections, such that a first number of latching members has means for securing the connection between the housing sections, and a second number of latching members has means for adjusting the torque required to unlock the housing sections and means for adjusting the torque required to lock the housing sections.

Abstract: A compact filter element in which the end faces of a plurality of nonwoven filter layers (3) are fixedly integrated into a cover (4) and in which the oncoming flow of fluid to be filtered is deflected in the cover (4) in such a way that the fluid flows respectively into every second or alternating area between two adjacent nonwoven filter layers (3) and flows through the nonwoven filter layers (3) into the intervening spaces between the spaces between filter layers in to which it initially flows, from which intervening spaces it exits the filter element.