Patent ID: 8142536

Claim:
Filter unit ( 100 ), comprising a housing including a first housing member ( 20 ) having an open sidewall not closed over by the first housing member; at least one filter element designed for axial flow between its end faces, that with at least part of its length is inserted into a tubular filter protection element ( 10 ) and is connected thereto and that about its outer circumference has at least one endless sealing collar, wherein the sealing collar is supported on the filter protection element ( 10 ) and can be pressed by means of clamping means against a sealing flange on the first housing member ( 20 ), wherein the open sidewall is adapted for insertion of the filter element into the first housing member, wherein the clamping means are formed by at least one insertion ramp ( 25 ) on the first housing member ( 20 ) and at least one projection ( 15 ) on the filter protection element ( 10 ) that is gliding along the insertion ramp, wherein the insertion ramp ( 25 ) extends from an insertion point ( 25 . 5 ) located in an interior of the first housing member in a direction transverse to a flow direction towards a sidewall of the first housing member ( 23 ) and also in an axial direction toward the sealing flange on the housing ( 23 ).