Patent ID: 8409312

Claim:
An air filter unit for filtration of gaseous fluids, comprising: a filter housing ( 9 ) having a longitudinal axis, said filter housing including a first housing part ( 10 ) including an axially extending first sealing stay ( 13 ), said sealing stay including a contact surface; a second housing part ( 11 ) including an axially extending second sealing stay ( 14 ) arranged radially outwardly of said first housing part ( 10 ) sealing stay ( 13 ), said second housing part ( 11 ) detachably joined to said first housing part in a mounting direction, said second sealing stay including a contact surface; a filter insert part ( 1 ) including a raw flow face and a clean flow face, said filter insert part ( 1 ) inserted into said housing ( 9 ), said filter insert part ( 1 ) including a filter medium ( 2 ); and a sealing element ( 3 ) arranged on a radial outer circumference of said filter medium at one of said flow faces, said sealing element extending radially outwardly from said outer circumference, said sealing element ( 3 ) secured to said filter medium; wherein said first housing part includes a connecting section ( 16 ) having a first end secured to an outwardly facing side of said sealing stay ( 13 ), said connecting section ( 16 ) extending radially outwardly from said sealing stay ( 13 ); a support stay ( 15 ) secured to an opposing second end of said connecting section ( 16 ), said sealing stay ( 13 ) with said connecting section ( 16 ) and said support stay ( 15 ) forming a U-shaped receiving space ( 17 ) surrounding an outer side of said first housing part ( 10 ); wherein said second sealing stay ( 14 ) of said second housing part ( 11 ) is receiving into said U-shaped receiving space ( 17 ); wherein said first sealing stay ( 13 ) separates an interior of said first housing part ( 10 ) from said U-shaped receiving space ( 17 ); wherein a portion of said sealing element ( 3 ) clamped between said contact surface of sealing stays ( 13 , 14 ) of said housing parts ( 10 , 11 ) in said U-shaped receiving space ( 17 ); wherein said contact surfaces of radially spaced first and second sealing stays ( 13 , 14 ) exert a clamping force radially compressing said sealing element ( 3 ), said clamping force extending approximately orthogonally to said mounting direction of said housing parts ( 10 , 11 ).