Patent ID: 6949182
Filing Date: 2005-09-27
Classification: B01D

Abstract:
1. An oil filter comprising: a cap covering an annular filter element; a holder disposed in an inner peripheral side of said filter element; a valve seat mounted to said cap; said valve seat having a plate member and an oil passing hole extending through the plate member; a valve body being movable in an axial direction of said holder so as to abut against said valve seat; said valve body having a protruded portion formed on a side abutting against the valve seat; said protruded portion projecting through the oil passing hole of the valve seat so that the protruded portion is guided by the oil passing hole, and penetrates from a lower side of the plate member past an upper side of the plate member; and a spring member disposed between a spring receiving portion formed on said holder and said valve body, wherein either one of said holder and said valve body is formed with a claw portion for the valve body and another one of the holder and the valve body is formed with an engagement portion for the valve body to be engaged with said claw portion for the valve body, and when said claw portion for the valve body is engaged with the engagement portion for the valve body, the valve body is assembled with the holder, and either one of said holder and said valve seat is formed with a claw portion for the valve seat and another one of the holder and the valve seat is formed with an engagement portion for the valve seat to be engaged with said claw portion for the valve seat, and when said claw portion is engaged with the engagement portion for the valve seat, the valve seat is assembled with the holder.