Patent ID: 6485635
Filing Date: 2002-11-26
Classification: B01D,Y10S

Abstract:
A filter comprising:a pot-shaped filter housing, a filter element support tube disposed in the filter housing, a return flow check valve disposed in the support tube and having a spring and a valve plate, wherein said valve bears against a valve seat disposed in said support tube, and a filter element arranged on the support tube, said filter element consisting essentially of a pleated annular filter material with a pair of resilient end plates affixed to respective end faces thereof, said filter element being pushed onto said support tube with each of said end plates forming a radial seal with said support tube, said support tube having an attachment thread which can be screwed onto a mating threaded portion on a mounting flange to attach the filter to the mounting flange, wherein the spring of said return check valve is axially disposed between said valve plate and the mating threaded portion of said mounting flange, and said filter housing directly receiving a gasket for sealing said housing to the mounting flange.