Patent ID: 8246702

Claim:
A filter device for filtering intake air of an internal combustion engine, comprising: a filter housing ( 12 ), comprising a cyclone preseparator ( 26 ) is arranged on the filter housing; an exchangeable main filter element ( 36 ); a secondary filter element ( 38 ); a housing compartment ( 68 ) of the filter housing ( 12 ) that can be opened or closed by a servicing cover ( 18 ); wherein in the housing compartment ( 68 ) of the filter housing ( 12 ) insertions stays ( 64 ) are formed which position the exchangeable main filter element ( 36 ) in the housing compartment ( 68 ) of the filter housing ( 12 ); wherein the exchangeable main filter element ( 36 ) is a double bellows filter with a first filter bellows ( 40 ) and a second filter bellows ( 42 ) enclosing the first one; wherein the two filter bellows ( 40 , 42 ) are substantially flowed through in radial direction and a sealing force acting on the main filter element ( 36 ) is generated and maintained upon closing the servicing cover ( 18 ); wherein the main filter element ( 36 ) as well as the secondary filter element ( 38 ) are arranged downstream in the flow direction of the fluid to be filtered; wherein the servicing cover ( 18 ) closing the housing compartment ( 68 ) of the filter housing ( 12 ) comprises a grip member ( 22 ) with a locking action ( 24 ); wherein the grip member ( 22 ) includes an opening ( 30 ) and the grip member has an uninterrupted surface; and wherein the grip member ( 22 ) has a locking depression ( 56 ).