A filter housing has a first housing part with a first rim section and a second housing part with a second rim section. The housing parts can be joined and separated from each other in axial mounting direction and define a housing interior for a filter element provided with a circumferentially extending sealing element. The first and second rim sections form a receiving area in which the sealing element is seal-tightly clamped radially between the first and second rim sections when the housing parts are joined in the mounted state. A snap connecting device axially braces the first and second housing parts relative to each other. The snap connecting device is formed integrally on the first and second housing parts such that a clamping force applied by the first and second rim sections on the sealing element in radial direction is decoupled from the snap connecting device.

A filtration system having an undulated interlocking housing-endplate interface geometry is described. In the filtration system, a filter element endplate and a filter housing component (e.g., a shell housing, a filter mounting head, etc.) meet at an interface. The filter housing component includes an undulating or repeating pattern that meshes with a matching undulating or repeating pattern on the endplate of the filter element. The undulating or repeating pattern prevents the filter element from freely rotating with respect to the filter housing component of the filtration system.

An air filter element and air filter system are provided. The filter element has an annular gasket that has multiple portions. A first portion provides axial sealing while a second portion provides only radially sealing. The filter element includes a frame with a radial abutment for engagement with a tooth on a filter housing for providing lateral biasing to the portion of the gasket that provides radial sealing.

A filter system (100) having a housing (110), a fluid inlet (102) formed in a housing wall (112), a fluid outlet (108) formed in a housing wall (120), a primary filter element (50) and a secondary filter element (10). The secondary filter element (10) arranged on a stand pipe (150) rigidly connected to one of the housing walls (120). The primary filter element (50) comprises a first end cap (52) at its top region (53) and a second end cap (54) at its bottom region (55). The housing wall (120) accommodates the stand pipe (150) and the bottom region (55) of the primary filter element (50), which are configured with mutual self-positioning elements (92, 62) to accommodate the primary filter element (50) on the housing wall (120) in a defined rotational position with respect to one or more struts (170) of the stand pipe (150).

A filter system (100) having a housing (110), a fluid inlet (102) formed in a housing wall (112), a fluid outlet (108) formed in a housing wall (120), a primary filter element (50) and a secondary filter element (10). The secondary filter element (10) is arranged on a stand pipe (150) which is rigidly connected to one of the housing walls (120). The secondary filter element (10) comprises a filter medium (16) forming a body (36) having at least one longitudinal seam (18) along a longitudinal axis (L). The filter body (36) has a first edge (13) at one region (12) which is curved in an initial unwound state of the filter medium (16) and straight in a final wound state of the filter medium (16) forming the filter body (36) and a second edge (15) at the opposite region (14) of the filter body (36) with respect to the longitudinal axis (L) which is straight in an initial unwound state of the filter medium (16) and curved in a final wound state of the filter medium (16) forming the filter body (36). A method of manufacturing is also disclosed.

A filter system (100) having a housing (110), a fluid inlet (102) formed in a housing wall (112), a fluid outlet (108) formed in a housing wall (120), a primary filter element (50) and a secondary filter element (10). The secondary filter element (10) is arranged on a stand pipe (150) rigidly connected to one of the housing walls (120). The secondary filter element (10) includes a filter medium (16) forming a body (36) having at least one longitudinal seam (18) along a longitudinal axis (L) and an end cap (20) at its top region (12). The secondary filter element (10) and the stand pipe (150) are mutually connected by connection elements (22, 156). The secondary filter element (10) and the stand pipe (150) are configured with mutual self-positioning elements (30, 180) to arrange the secondary filter element (10) in a defined rotational position with respect to one or more struts (170).

A filter connection for a smoke evacuation device includes a filter canister assembly and a socket. The filter canister assembly has a cross-sectional shape with only one line of symmetry that corresponds to a cross-sectional shape of the socket so that the filter canister can only be inserted into the socket in one orientation. One or more key notches on the filter canister may also ensure that the filter is properly installed. A seal creates an airtight boundary between the filter canister and a recess of the socket so that a sealed path in communication with the smoke evacuation device is established before the filter canister is fully inserted into the socket. An electronic connection is made between the filter canister and the socket after the airtight boundary is created.

An ambient air purifying device has a blower housing with air inlet and air outlet. In the blower housing, a flow generating device is arranged generating an air flow from air inlet to air outlet. Between air inlet and air outlet, a filter device is arranged with filter elements arranged relative to each other in a V shape. The blower housing has a servicing door through which the blower housing interior is accessible. The filter device has a filter element support held at the blower housing and supporting the filter elements. The filter element support is pivotably supported about an axis at the blower housing. The filter element support is transferrable from an operating state, in which it is completely inside the blower housing, into a servicing state, in which it projects at least partially through the servicing door from the blower housing, by pivoting about the axis.

A filter module is provided with a filter housing provided with an inflow opening. A filter element with an annular filter medium body with an elongate cross-sectional shape is arranged inside the filter housing. A flow path is defined between the inflow opening of the filter housing and an inflow side of the filter medium body. A swirl device is arranged in the flow path and impresses a swirl onto an incoming fluid. The swirl device is a part separate from an outer wall of the filter housing. The swirl device is arranged axially upstream of the inflow side of the filter medium body. The swirl device is provided with a displacement body arranged inside the filter housing adjacent to the inflow opening. The displacement body forms a flow guiding element.

A filter assembly that includes a filter housing with a housing interlocking feature, a filter cover with a filter cover interlocking feature, and a filter element with a filter element interlocking feature is disclosed. The filter element is positionable within the filter housing, and the filter cover is attachable to a top portion of at least one of the filter element and the filter housing. The housing interlocking feature, the filter cover interlocking feature, and the filter element interlocking feature are interlockable with each other and extend in a nonplanar configuration along at least one side of the filter element when the filter housing, the filter cover, and the filter element are assembled together.