The invention relates to a liquid filter (6, 12), preferably a fuel filter, for a vehicle, said filter comprising a filter head (36) delimiting an inlet port (19) and an outlet port (21), a filter housing (30) which is to be screwed below the filter head (36) and which contains a filter element (32) centred on a central axis (X38), said filter element including a filter medium (38), a top end plate (42) and a bottom end plate (40). The filter housing (30) delimits a first volume for receiving a flow of liquid to be filtered, said first volume being delimited radially around the filter medium (38) and communicating with the inlet port (19) and a second volume for receiving a flow of filtered liquid, said second volume being delimited radially inside the filter medium (38) and communicating with the outlet port (21). The filter head (36) includes an anti-leakage valve (50) comprising a closing element (52) that is movable between a closed position in which it closes off the inlet port (19) and an open position in which the liquid can flow through the inlet port (19) and the filter (6, 12) further includes a pin (54) that is fitted on the filter element (32) and that is configured to penetrate inside the inlet port (19) so as to move the closing element (52) from the closed position to the open position.

The invention relates to a liquid filter (6, 12), preferably a fuel filter, for a vehicle, said filter comprising a filter head (36) delimiting an inlet port (19) and an outlet port (21), a filter housing (30) which is to be screwed below the filter head (36) and which contains a filter element (32) centred on a central axis (X38), said filter element including a filter medium (38), a top end plate (42) and a bottom end plate (40). The filter housing (30) delimits a first volume for receiving a flow of liquid to be filtered, said first volume being delimited radially around the filter medium (38) and communicating with the inlet port (19) and a second volume for receiving a flow of filtered liquid, said second volume being delimited radially inside the filter medium (38) and communicating with the outlet port (21). The filter head (36) includes an anti-leakage valve (50) comprising a closing element (52) that is movable between a closed position in which it closes off the inlet port (19) and an open position in which the liquid can flow through the inlet port (19) and the filter (6, 12) further includes a pin (54) that is fitted on the filter element (32) and that is configured to penetrate inside the inlet port (19) so as to move the closing element (52) from the closed position to the open position.

A fuel filter has a filter housing and a fuel filter insert exchangeably arranged in the filter housing and provided with a prefilter element and a main filter element. Prefilter element and main filter element are positioned one behind the other in the filter housing in axial direction of the filter housing. A fuel discharge channel is arranged in the filter housing below the fuel filter insert. In operating position of the fuel filter insert in the filter housing, the raw sides of prefilter element and of main filter element are sealed relative to the fuel discharge channel by seal-tight contact of the fuel filter insert on the filter housing. The raw side of the main filter element, when the fuel filter insert is moved by axial movement away from the operating position, is fluidically connected with the fuel discharge channel via the raw side of the prefilter element.

A filter element of a filter for liquid, a drainage closure element, a housing part, and a filter are described, wherein the filter element has a filter medium which continuously surrounds circumferentially an element interior relative to a virtual axis and is connected to an axial end body. The end body is provided with a filter element drainage opening surrounding the axis and communicating with the element interior. A filter element sealing surface or filter element seal surface of a filter element sealing device is provided at the end body and continuously surrounds circumferentially the filter element drainage opening. The filter element drainage opening is closed by the filter element sealing device when the filter element is mounted in the filter housing of the filter. The filter element sealing surface or filter element seal surface is axially oriented with at least one direction component relative to the axis.

A filter device may include a filter housing with a filter housing pot and a cover screwable onto the filter housing pot, and an annular filter element arranged in the filter housing and having an axially protruding pin for closing a run-off channel. The annular filter element may be connected to the cover via a first thread, which may have a dome protruding centrally and axially from an upper end disc of the annular filter element. The first thread may be designed running counter to a second thread arranged between the filter housing pot and the cover.

A filter device may include a filter housing with a filter housing pot and a cover screwable onto the filter housing pot, and an annular filter element arranged in the filter housing and having an axially protruding pin for closing a run-off channel. The annular filter element may be connected to the cover via a first thread, which may have a dome protruding centrally and axially from an upper end disc of the annular filter element. The first thread may be designed running counter to a second thread arranged between the filter housing pot and the cover.

A fuel filter includes a manifold, a connector element, a filter bowl, a filter element, a shutoff valve, an inlet port, an inlet passage, an outlet port, an outlet passage and a relief valve in which the connector element is fixed to the manifold, and the filter bowl is reversibly fixed to the connector element, the filter bowl is adapted to reversibly receive the filter element and is so configured that when the filter element is located within the filter bowl and the filter bowl attached to the connection element the filter element divides the space defined by the connector element and filter bowl into an inlet filter chamber and an outlet filter chamber, the inlet port is incorporated in the manifold, and the inlet port and inlet filter chamber are in fluid communication via the inlet passage, the outlet port is incorporated in the manifold.

A retention mechanism for releasably securing a receptacle to another component includes a ratchet lever pivotally mounted about a screw, a torsion spring having a first end attached to a first end of the lever and being biased to pivot the lever about the screw axis to a first, locked position. A second end of the lever engages, in use, with teeth provided on the receptacle to secure the receptacle against rotation relative to the other component. The mechanism has a compression spring arranged to bias the lever in an axial position such that, in the first, locked position, the second end of the lever engages the teeth. The first end of the lever is configured to receive pressure from a user against the force of the torsion spring to pivot the lever about the axis such that the second end of the lever disengages from the teeth.

A filter system may include a housing, a filter element, and a separate positioning mechanism. The housing may include an opening, a function carrier, a drain opening, and a radially protruding contour. The filter element may include a first end disc, a second end disk, and a filter material disposed between the first end disk and the second end disk. The first end disk may include at least one of a radially projecting contour and an inwardly projecting recess. The second end disk may include a central opening and an eccentrically projecting locking pin. The central opening may be adapted to interact with the function carrier. The positioning mechanism may have a body with a first recess and at least one second recess, which may be configured to facilitate positioning and aligning the filter element in the housing such that the locking pin engages in the drain opening.

A fluid filter is mountable on a connection flange having a central stand pipe and an exchangeable filter insert. The insert has a hollow cylindrical filter material body with two end plates on its end faces and is mountable on the stand pipe. A cup-shaped screw housing of the filter can be screwed to a free end of the stand pipe, and supports a seal on a free edge thereof, via which the screw housing is sealable against a connection flange sealing surface when mounted. The filter has a first arrangement on an end face area to center the end face area to the flange. The filter insert has a second arrangement on the end face area outer periphery for centering the screw housing free edge relative to the connection flange sealing surface. The second arrangement interacts in a centering manner with the screw housing free edge when installed.