Abstract: A suction device may include a suction channel, a first valve, and a second valve. The suction channel may include a first suction portion and a second suction portion disposed opposite one another in a transverse direction. The first valve may be arranged in the first suction portion. The first valve may include a first valve seat and a moveable first valve body. The second valve may be arranged in the second suction portion. The second valve may include a second valve seat and a moveable second valve body. When a transverse acceleration is equal to or greater than a predefined transverse acceleration, one of the first valve and the second valve may close while the other one of the first valve and the second valve remains open. When the transverse acceleration is less than the predefined transverse acceleration, the first valve and the second valve may both be open.

Abstract: A suction device may include a suction channel, a first valve, and a second valve. The suction channel may include a first suction portion and a second suction portion disposed opposite one another in a transverse direction. The first valve may be arranged in the first suction portion. The first valve may include a first valve seat and a moveable first valve body. The second valve may be arranged in the second suction portion. The second valve may include a second valve seat and a moveable second valve body. When a transverse acceleration is equal to or greater than a predefined transverse acceleration, one of the first valve and the second valve may close while the other one of the first valve and the second valve remains open. When the transverse acceleration is less than the predefined transverse acceleration, the first valve and the second valve may both be open.

Abstract: A filter device having a filter element received in a filter housing, the filter housing has an inlet and an outlet. The filter element separates a crude chamber that communicates with the inlet from a pure chamber that communicates with the outlet. The filter element has an axially and eccentrically projecting plug, which in an inserted state, is plugged into a plug receptacle formed within the filter housing, and wherein at least one signal generator recognizes at least one of a presence and an absence of the plug in the plug receptacle, generating at least one signal.

Abstract: An oil purifying liquid filter, having an annular ring element receiving space, wherein the ring element has two axial end disks, a cover selectively fastened to a housing to close the receiving space, an inlet that is formed within the housing on a crude side, an outlet that is formed within the housing on a pure side, a first additional opening that is formed within the housing, a second additional opening that is formed within the cover, a first closure that is formed on the first end disk of the filter element in order to close the first additional opening, and a second closure that is formed on the second end disk of the filter element to selectively close the second additional opening.

Abstract: A filter device having a filter element received in a filter housing, the filter housing has an inlet and an outlet. The filter element separates a crude chamber that communicates with the inlet from a pure chamber that communicates with the outlet. The filter element has an axially and eccentrically projecting plug, which in an inserted state, is plugged into a plug receptacle formed within the filter housing, and wherein at least one signal generator recognizes at least one of a presence and an absence of the plug in the plug receptacle, generating at least one signal.

Abstract: A filter assembly, having a housing including a housing bottom portion; at least one ring filter element that is received by at least one receiving space defined at least in part by the housing, wherein the receiving space includes a receiving space bottom portion; a cover attached to the housing bottom portion and configured for at least partially enclosing the at least one receiving space and the ring filter element, wherein the at least one receiving space may be selectively emptied when the cover is removed; an outlet located at the receiving space bottom portion within the cover; and a closure located on the at least one ring filter element, wherein the closure is configured to at least partially close the outlet when the at least one ring filter element is inserted into the at least one receiving space.

Abstract: An oil purifying liquid filter, having an annular ring element receiving space, wherein the ring element has two axial end disks, a cover selectively fastened to a housing to close the receiving space, an inlet that is formed within the housing on a crude side, an outlet that is formed within the housing on a pure side, a first additional opening that is formed within the housing, a second additional opening that is formed within the cover, a first closure that is formed on the first end disk of the filter element in order to close the first additional opening, and a second closure that is formed on the second end disk of the filter element to selectively close the second additional opening.

Abstract: A liquid filter system, having an annular first filter element that separates a crude side from a clean side in a first filter chamber and a first plug, which projects axially and eccentrically with respect to a longitudinal center axis of the first filter element and extends axially into a first plug receptacle after insertion in the first filter chamber. A annular second filter element that separates a crude side from a clean side in a second filter chamber and a second plug, which projects axially and eccentrically with respect to a longitudinal center axis of the second filter element and extends axially into a second plug receptacle after insertion in the second filter chamber, and wherein the filter elements differ from one another at least in that the plugs have at least one of different eccentricities and shapes.

Abstract: The invention relates to a fluid filter (1), in particular an oil filter for cleaning lubricating oil, in particular for internal combustion engines of motor vehicles, comprising a receiving space (3) for receiving a ring filter element (4), a cover (5) that can be attached to a housing (2) for closing the receiving space (3), an inlet (6) for crude fluid, an outlet (7) for cleaned fluid, an outlet (8) arranged on the bottom of the receiving space (3) in the installed state through which the receiving space (3) can be emptied when the cover (5) is removed, and a closure (11) arranged on the ring filter element (4), closing the outlet (8) when then ring filter element (4) is inserted into the receiving space (3) and the receiving space (3) is closed with the cover (5). To achieve another installed state, the cover (5) that can close the receiving space (3) is arranged on the bottom of the housing (2) in the installed state and contains the outlet (8).