Self-lubricating packing member

Details Self-lubricating packing member Self-lubricating packing member

1984-11-13

1985-07-02

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277205, 277215, 277DIG6, F16J 1532, F16J 1540

Patent

active

045263850

ABSTRACT:
A packing member comprising an annular body having a circular groove extending axially thereinto through an end wall to form inner and outer sealing lips utilizes a resilient circular member embedded in the annular body to exert a radially directed force to a wall surface of the groove to actuate one of the sealing lips. The other sealing lip has a plurality of spaced apart circular holes extending axially there into through the first end wall of the body. In the preferred embodiment the resilient member is a hollow O-ring of elastomeric material carried in a recess formed in the inner wall surface of the groove to actuate the inner sealing lip. An annular layer of self-lubricating polymeric material is disposed over the inner wall surface to facilitate low-friction slidable contact with a separate movable member. The inner sealing lip may be left exposed to ensure proper sealing engagement with a separate movable member, or alternately, an interior annular rib is provided beneath the polymeric layer or film for such improved sealing.

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