Seal assemblies

Details Seal assemblies Seal assemblies

1984-10-19

1986-07-01

Garrett, Robert E.

Expansible chamber devices

Selective clearance control

92 80, 92 82, 92 86, 92166, 92167, 92168, F16J 1552, F16J 1556

Patent

active

045973229

ABSTRACT:
A seal assembly is arranged to contain leakage of hydraulic fluid passing between a wall opening and a penetrant rod portion passing through the opening. The seal assembly includes a sliding-seal member mounted on a portion of the rod for sliding movement toward and away from an abutment surface and a non-sliding flexible-seal member arranged between the body and the sliding-seal member. The body, flexible-seal member, sliding-seal member and rod define a sealed chamber into which such fluid will leak. The chamber communicates with a fluid reservoir through a oneway check valve. The sliding-seal and flexible-seal members are arranged in parallel with one another. In one embodiment, a spring urges the sliding-seal member to move toward an abutment surface provided on the rod. In another embodiment, movement of the sliding-seal member relative to the body is limited by facing abutment steps.

REFERENCES:
patent: 3101219 (1963-08-01), Herrera
patent: 3107583 (1963-10-01), Woodward
patent: 3293994 (1966-12-01), Napolitano
patent: 3768371 (1973-10-01), Orme
patent: 3972396 (1976-08-01), Bochnak

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