Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Patent
1997-01-31
1998-08-11
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
277549, F16J 1532
Patent
active
057916586
ABSTRACT:
A shaft seal of the type utilizing a metal support element or seal case which fits or is inserted into a housing. The seal includes a seal element extending radially inward which when disposed over the shaft causes the seal to flex about a flex section thus applying a contacting force to a seal lip. The seal lip includes a plurality of radial undulations along the seal face, said undulations radial with respect to the axis of the shaft. Said seal lip further including a static seal for engaging the outer circumferential surface of the shaft. The seal element is formed of a semi-rigid material such as a fluorinated resin or thermo-plastic elastomer. Such seals exhibit high-wear characteristics opposed to the low-wear characteristics of an elastomer. Further, the seal element includes a plurality of symmetrical undulations which provide a hydro-dynamic pumping effect to pump any fluid migrating along the shaft/seal interface back into the sealed space.
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DePumpo Daniel G.
Freudenberg-NOK General Partnership
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