Delayed action oil filter bypass valve

摘要

A bypass valve assembly, comprising: (a) a housing 12 having an inlet 16 and an outlet 18; (b) a valve member 20 disposed within the housing and being movable between a closed position and an open position; and (c) a slug of material 30 disposed in an initial substantially solid phase in contact with the valve member 20 so as to maintain the valve member in the closed position. The slug of material 30 is subsequently heatable into a substantially softened phase so as to permit the valve member 20 to move into the open position.