Patent ID: 8308835

Claim:
A cylindrical filter element ( 100 ), comprising: a central tube ( 12 ) having wall penetrations ( 13 ); a cylindrical tubular bellows ( 11 ) having axially opposing end faces ( 1 , 2 ), wherein said filter bellows ( 11 ) surrounds said central tube ( 12 ); terminal disks ( 20 , 30 ) respectively closing off said end opposing end faces ( 1 , 2 ) of said tubular bellows; wherein one of said terminal disks ( 20 , 30 ) is a fixed terminal disk secured fixed positionally relative to the central tube ( 12 ), secured thereto and configured to serve as a fixed bearing, and wherein a second one of said terminal disks ( 20 , 30 ) is a floating terminal disk configured as a floating bearing axially moveable on and along said central tube and having an annular shape provided with an inwardly positioned radial annular seal ( 22 , 32 ) contacting the central tube ( 12 ), wherein said floating terminal disk does not engage into a wall of said central tube limiting said movement on said central tube, wherein said fixed terminal disk and said floating terminal disk are of the same configuration but differing in that different seals are attached or formed therat.