Abstract: The present invention provides a seal having a generally annular elastomeric body having an S-shaped cross-section that includes a first portion, a second portion and an intermediate portion connecting the first and second portions. A first ring is disposed in the first portion and a second ring disposed in said second portion.

Abstract: An apparatus for depositing a viscous valve opener material within an engine oil filter is disclosed herein. The engine oil filter includes an anti-drain back valve that is normally closed on a seat, the seat having inlet passages therethrough for oil passage into the filter. The apparatus includes a base and a plurality of injectors extending from the base arranged so as to be insertable into the inlet passages of the oil filter. The injectors are sized to lift the valve off the seat thereby forming a space between the valve and seat. The injectors include openings facing the space between the valve and seat for depositing the temporary viscous valve opener material into the space.

Abstract: An apparatus for depositing a viscous valve opener material within an engine oil filter is disclosed herein. The engine oil filter includes an anti-drain back valve that is normally closed on a seat, the seat having inlets therethrough for oil passage into the filter. The apparatus for depositing the temporary viscous valve opener material includes a base and a plurality of injectors extending from the base arranged so as to be insertable into the inlets of the oil filter, the injectors being dimensioned to lift the valve of its seat thereby forming a space between the valve and seat. The injectors include openings facing opposite the space between the valve and seat for depositing the temporary viscous valve opener material into the space.

Abstract: An oil filter for an internal combustion engine lubrication system has an anti-drainback valve that is temporarily held open with a quantity of special grease during the initial filling of the engine's oil lubrication system with oil, and then passively melts or dissipates upon contact with the oil so as to allow the anti-drainback valve to thereafter close.