Filter assemblies are described and shown. Components, features and methods of assembly and use are described. Many of the principles relate to preferred cartridge configurations for engagement with selected housings. Selected optional features described can be used to provide indication to a service provider that a proper cartridge is not positioned appropriately in the housing for use.

An air cleaner including a first housing including a first suction port and a first discharge port; a first fan inside the first housing; a coupling duct on an upper portion of the first housing; a second housing including a second suction port and a second discharge port; a second fan inside the second housing; and a coupling base on a lower portion of the second housing and including a guide surface sloping outwardly in an upward direction, wherein the coupling base is separably couplable to the coupling duct. When the coupling base and coupling duct are coupled, a portion of air discharged through the first discharge port is guided by the guide surface and discharged outside of the second housing, and when the coupling base and coupling duct are separated, air is guided by the guide surface into the second housing.

This present invention relates to a unique HVAC air filter holder designed to prevent or reduce air from escaping or otherwise bypassing the HVAC air filter. The HVAC air filter holder comprises a filter securing device, and is a material that is compressible, moldable, expansible or the like such that it can be secured around the perimeter of the air filter.

An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing can include a first part of a first connection arrangement. The air filter cartridge can include a second part of the first connection arrangement. In one aspect, the first and second parts can be secured together place the air filter cartridge in a latched position by moving the air filter cartridge in a first direction. In one aspect, the first and second parts can be disconnected from each other to place the air filter cartridge in an unlatched position by moving the air filter cartridge in the first direction. The air cleaner assembly can include a second connection arrangement securing the air filter cartridge to the housing cover such that the housing body and housing cover are secured together.

A variable damping assembly includes a base, a supporting member, a damping member, and an elastic member. The supporting member is positioned on the base. The damping member is rotatably coupled to the supporting member and presses against the housing. The elastic member includes a first end and a second end opposite to the first end. The first end of the elastic member is coupled to the supporting member and the second end of the elastic member is coupled to the housing. The elastic member provides an elastic force and the damping member provides a damping force changed as the elastic force changes.

A filter (1) for filtering air, in particular an air filtering element (30), is provided for releasably fitting into a housing (10) which has a housing upper part (11) and in particular a central tube (20) fastened to the housing upper part (11), and also the housing for the filtering element (30) is provided. The filtering element has a seal (33, 34) for holding the filtering element (1) on the housing upper part (11) and the central tube (20) and for sealing the space (111) between the filtering element (30) and housing upper part (11) when the filtering element (30) is releasably fitted in the housing (10). The seal (33, 34) is connectable in a form-fitting manner to a sealing receptacle (111) of the housing upper part (11) and/or of the central tube (20).

A cover for a filter assembly, of a machine, may comprise a first surface comprising a first recessed surface and a second surface, opposite the first surface, comprising a second recessed surface. The first recessed surface may be configured to engage with a first end of a first element of the filter assembly. The second recessed surface may be configured to engage with a second end of a second element of the filter assembly. The cover may be configured to install the first element in an opening of the filter assembly and to remove the first element from the opening. The cover may be configured to install the second element in the opening over the first element and to remove the second element from the opening.

A laundry appliance includes a cabinet defining an interior volume and a housing mounted within the interior volume of the cabinet. The laundry appliance also includes an air filter assembly positioned in the housing. The air filter assembly includes a shell, a sealing member on a face of the shell, and a biasing element configured to bias the shell into sealing engagement with the housing.

A filter device has a filter element with filter medium body and surrounding frame with opposed lateral faces. A filter housing has opposed wall sections with two engagement counter elements for receiving with form fit an engagement element, respectively. The engagement counter elements are grooves in the wall sections with an insertion section and a blocking section connected to the insertion section and angled thereto. The insertion section permits insertion of the engagement element along a flow direction through the filter element. In the mounted state, the engagement element is arranged at one of the lateral faces of the frame, extends away from the filter medium body, and is held in the blocking section. One or several of the engagement elements are separate parts fastenable detachably to the filter element. A vehicle with such a filter device and a method for mounting the filter element with engagement elements are provided.

A filter device has a filter element with filter medium body and surrounding frame with opposed lateral faces. A filter housing has opposed wall sections with two engagement counter elements for form fit engagement of an engagement element, respectively. The engagement counter elements are grooves in the wall sections with an insertion section and a blocking section connected to the insertion section and angled thereto. The insertion section permits insertion of the engagement element along a flow direction through the filter element. When mounted, the engagement element is arranged at one of the lateral frame faces, extends away from the filter medium body, and is held in the blocking section. Two of the engagement elements are connected by a connection piece. A vehicle with such a filter device, a set of filter element and engagement elements, and a method for mounting the filter element with engagement elements are provided.