A closing and opening device for cartridge filter housings, including a first body and a second body, which move relative to each other, a sealing element between the first body and the second body and moving devices of the first body with respect to the second body; the moving devices are configured to perform a relative shift between the first body and the second body, moving them close and away, to switch from the first configuration where the first body and second body are located at a first distance so that the sealing element is in a resting position to the second configuration where the first body and second body are placed at a second distance, shorter than the first distance, so that the sealing element is compressed by the first body and by the second body.

A filter cartridge includes a threaded sleeve having a seal holder recess and seal member. The filter cartridge is for removably threading onto a filter head that includes threads for connection to the filter cartridge by way of the threaded sleeve. The filter head includes a ramp that engages the seal member to form a seal. The force needed to make the seal is a torque of less than 10 N-m.

An integrated seal member includes an at least partially annular body defining a longitudinal axis, a radial direction, and a circumferential direction. The at least partially annular body includes a top annular mounting portion, a sealing portion including at least one top sealing feature and at least one bottom sealing feature, and a connecting portion that extends at least radially outwardly from the top annular mounting portion to the sealing portion.

A spin-on filter assembly with replaceable coreless element comprises: a reusable spin-on housing including a filter bowl having sealing structure on a bottom of the filter bowl and a sealing structure on a top of the filter bowl; a center support tube integral with the filter bowl and including a perforated tube and an upper portion having an threaded coupling allowing for the filter assembly to threaded into position and an exterior sealing structure; and a replaceable coreless filter element mounted on the central support tube within the filter bowl and having filter media, a lower sealing structure configured to engage with the sealing structure on the bottom of the filter bowl and an upper sealing structure configured to engage with the exterior sealing structure on the center support tube.

A filter assembly includes a ring of filter media, a first end cap, a second end cap, a first seal, and a second seal. The first end cap is coupled to a first end of the filter media. The second end cap is coupled to a second end of the filter media and includes (i) a radially extending portion having a first opening and (ii) a first axially extending portion having a stepped ledge defining a first inner diameter. The first seal is supported by the second end cap and includes a second opening defining a second inner diameter that is less than the first inner diameter. The second seal is supported by the second end cap and includes a third opening defining a third inner diameter that is greater than the first and second inner diameters. The stepped ledge is disposed between the first seal and the second seal.

A filter such as a liquid filter for use with a filter head that includes a filter base collar is provided. The collar retains the filter to the filter base and includes a plurality of protrusions and receiving gaps between adjacent protrusions. The filter has a mounting interface including an inlet port, an outlet port and a plurality of radial projections, with the mounting interface configured for fluid communication filter head and with the radial projections being arranged in an annular array configured to pass through the receiving gaps and also configured to axially engage the protrusions of the collar.

A filter device with a removable termination part (81; 82) and a housing (3) that receives a replaceable filter element (5) having two end caps (25,47). Between the end caps, a filter material (12) extends. A positioning device (65) is arranged between the termination part (81; 82) and one end cap (47). The positioning device positions the filter element (5) within the housing (3), at least when viewed in the circumferential direction of the filter element, in interaction with at least one corresponding positioning element (71) of the end cap (47).

A liquid filter device may include a filter housing and a ring filter element arranged in the filter housing. The filter housing may include a filter housing cover and a filter housing pot connectable tightly therewith via a housing seal. A discharge channel, a central clean channel, and a vent channel may be disposed in the filter housing pot. The ring filter element may include an upper end plate, a lower end plate, and a pleated star. When the liquid filter device is in an operating state, a pin arranged on the lower end plate may be disposed in and seal the discharge channel via a first seal, a second seal arranged on the lower end plate may be disposed against a surface of the clean channel, and a third seal arranged on the upper end plate may be disposed against a surface of the vent channel.

A filter system is provided with a housing provided with a cover. The housing has a raw liquid inlet, a clean liquid outlet, and a liquid drain. A filter element is provided that separates a raw side from a clean side. A slide valve with a valve rod and a sealing head is provided, wherein the sealing head is arranged such that the liquid drain of the housing is closable but openable. A coupling is arranged between the sealing head and the valve rod, providing an axial securing action of the valve rod at the sealing head and a radial securing action, separate from the axial securing action, of the valve rod at the sealing head. A slide valve for such a filter system as well as a sealing head and a valve rod for such a slide valve are provided.

A filter assembly including a filter housing having a longitudinal axis, the filter housing divided into a first filter chamber and a second filter chamber. The filter assembly further includes a first filter element and a second filter element. The first filter element includes a first element top endplate, a first element bottom endplate, and a first filter media positioned between the first element top endplate and the first element bottom endplate. The second filter element includes a second element top endplate, a second element bottom endplate, and a second filter media positioned between the second element top endplate and the second element bottom endplate. The filter assembly further includes a solid tube positioned between the first element top endplate and the second element bottom endplate.