Patent ID: 6790356
Filing Date: 2004-09-14
Classification: B01D

Abstract:
An oil filter assembly comprising:(a) a filter element; (b) an oil filter housing defining a filter chamber receiving the filter element and including a base defining a port, the port including a channel leading to a bottom of the filter chamber and out of the oil filter housing; (c) a cylindrical casing disposed within the port having a height equal to the height of the port, the casing including a first end having a radially inwardly extending annular lip defining an opening, a second end having a radially inwardly extending annular lip defining an opening and an opening between the ends in fluid communication with the channel of the housing; (d) a valve positioned in the casing and having a cylindrical collar coaxially arranged within the casing with a diameter larger than the casing openings, the valve including a stem attached to an upper side of the collar and extending through the first end opening of the casing for contacting a lower end of the filter element, the valve movable between an open and a closed position, the valve also including a plunger extending from a lower side of the collar configured to sealingly cover the second end opening of the casing when the valve is in the closed position; and (e) a spring within the casing and having an end abutting one side of the collar and an end abutting an annular lip for biasing the valve toward the open position such that said plunger is spaced apart from the second end opening of the casing to permit flow from the filter chamber to the port channel.