Patent ID: 8313549

Claim:
An air filter device for an internal combustion engine, comprising a filter element ( 7 ) arranged in a filter housing ( 2 ) which filter element is to be flown through by a fluid to be filtered, wherein the filter element has a fluid flow intake side and a flow outflow side, said outflow side space apart axially from said inflow side, wherein the filter element ( 7 ) is embodied as a multi-bellows filter with at least two radially nested filter bellows ( 10 , 11 ), at least one filter bellows ( 10 , 11 ) is to be flown through in radial direction, and between the filter bellows ( 10 , 11 ) an annular flow space ( 12 ) for the fluid is formed that is in flow communication with an end face of the filter element ( 7 ), wherein each filter bellows ( 10 , 11 ) is embodied as a star-shaped filter with filter folds arranged in a star shape, wherein on at least one end face of the filter element ( 7 ) a sealing ring ( 19 ) is arranged between the filter bellows ( 11 ) and the filter housing ( 2 ), wherein a portion of the filter folds of one of said at least two filter bellows is immediately contacting against and adhesively connected and tacked to immediately neighboring filter folds of a different one of said at least two filter bellows at an axial end face of said filter bellows, wherein a cover disk ( 16 ) closes over an interior ( 14 ) of a radially inwardly one of said nested filter bellows, said cover disk ( 16 ) extending radially across said interior ( 14 ) preventing fluid in the interior ( 14 ) from flowing axially by the cover disk ( 16 ), wherein at least at one end face of at least one filter bellows ( 10 , 11 ) a cover element ( 15 , 16 , 17 ) is arranged, the cover element embodied as a cover ring ( 15 , 17 ), wherein filter media folds of a first filter bellows ( 10 ) at one end face are completely covered by a cover ring ( 17 ), and filter media folds of a second filter bellows ( 11 ) are completely covered at the opposite end face with a cover ring ( 15 ).