Oil filter and method of manufacturing the oil filter

摘要

There is provided an oil filter capable of preliminarily confirming a correct assembling of a valve body to a holder and preventing the valve body from being abnormally assembled. A valve seat 22 is welded to a cap 14 covering a filter element 12. A claw portion for a valve body 25e is formed on the valve body 25, and an engagement portion for the valve body 27e to be engaged with the claw portion for the valve body 25e is formed on a holder 15 assembled with the inner peripheral side of the filter element 12. In addition, a spring member 29 is fitted between the valve body 25 and a spring receiving portion 27 provided for the holder 15. By the engagement of the claw portion for the valve body 25e with the engagement portion for the valve body 27e, the valve body 25 is assembled with the holder 15.