A filter assembly includes a housing, a cover, and a filter element. The housing defines a pocket. The cover includes a bayonet sized to be received within the pocket. The bayonet defines an elongated opening. The filter element is sized to be received within the housing. The filter element includes a media pack and a filter shell coupled to the media pack. The filter shell includes a trunnion that is sized to be received within both the pocket and the elongated opening to interlock the cover and the filter element such that removal of the cover from the housing initiates removal of the filter element.

Air filter device including a base plate with a plurality of spaced-apart flow openings and a plurality of filter cartridges each having at least one gas filter medium, the base plate includes adjacent to the flow openings at least one mounting device for mounting one filter cartridge each on the base plate, the filter cartridges each having at least one counter mounting means corresponding to the mounting device that is brought into operative connection with the respective mounting device of the base plate. The mounting device being a snap connection and the corresponding counter mounting means being a counter snap connection, the snap connection and the counter snap connection forming a snap connection, and the counter snap connection brought into operative connection with the snap connection by an axial movement. An air filter cartridge and an adapter for the air filter device. A method for replacing the air filter cartridge.

An air filter mounting plate having sealing side and a filter media retaining side, said mounting plate including an air passage opening and a gasket encircling the air passage opening provided on sealing side of the mounting plate, the gasket comprising a connection portion and double sealing lips (7a,7b) extending from the connection portion, and wherein the gasket is joined with the mounting plate by the connection portion being fixed on the sealing side of the mounting plate.