Pressure insensitive lip seal

Details Pressure insensitive lip seal Pressure insensitive lip seal

1980-11-18

1982-08-17

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 27, 277135, 277153, F16J 1532, F16J 1540

Patent

active

043446310

ABSTRACT:
A lip seal for preventing the mixing of seawater with an oil cavity around a marine stern tube includes an annular radial flange attached to one end of an axially extending bushing which is encircled by a garter spring. An axially extending foot projects from the bushing into the oil cavity and includes a hydrodynamic profile on its inner surface. A pocket is formed in the sealing face of the bushing and is pressurized with oil by the hydrodynamic profile on the bushing. The pressurized oil pocket balances the water pressure on the outside of the seal, and the hydrodynamic profile forms a fluid film which lubricates the seal and provides the balancing pressure for the pocket. A series of vents can be provided to vent excess oil pressure in the pocket to prevent leakage of oil out of the pocket into the water.

REFERENCES:
patent: 2177441 (1939-10-01), Pesarese
patent: 3443814 (1969-05-01), Dahlheimer
patent: 3894741 (1975-07-01), McHugh
patent: 4284280 (1981-08-01), Bertram et al.

Affiliated with

Also associated with

Rating

Pressure insensitive lip seal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure insensitive lip seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure insensitive lip seal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-183791