Patent ID: 6773480
Filing Date: 2004-08-10
Classification: B01D,F02M

Abstract:
A ring filter having two ends comprising:a) a star-shaped folded filtering material; b) a radially permeable tubular frame having two ends, and which extends approximately over an entire axial length of said ring filter adjoining said filtering material radially on an inside surface of said filtering material; c) a closure coupled to one end of said radially permeable tubular frame, said closure comprising: i) a plate shaped insert coupled to said radially permeable tubular frame; and ii) a molded closure section coupled to said plate shaped insert, extending radially outside said plate shaped insert and formed from a foamed plastic wherein said plate shaped insert is made from a different material; and d) a ring shoulder formed on said tubular frame opposite said closure, wherein said ring shoulder joins a closed end of said filtering material of said ring filter.