Automatic sequential dual action sealing system

Details Automatic sequential dual action sealing system Automatic sequential dual action sealing system

1975-03-03

1978-08-15

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 59, 277 73, 277177, 92 86, 64 23, 175293, 285351, F16J 1554, F16J 1556

Patent

active

041067797

ABSTRACT:
A shock absorbing subassembly with a body, a mandrel slidably and non-rotatively received in the body, dampening means therebetween, an upper seal above the dampening means and a floating seal therebelow for maintaining an oil bath between the body and the mandrel, a primary seal between the body and the mandrel below the floating seal, and a secondary seal actuated upon a predetermined magnitude of leakage past the primary seal to sequentially establish another seal between the body and the mandrel above the primary seal and below the floating seal.

REFERENCES:
patent: 2930636 (1960-03-01), Tracy
patent: 2996131 (1961-08-01), Greenwood
patent: 3153160 (1964-10-01), Carle
patent: 3406537 (1968-10-01), Falkner
patent: 3504936 (1970-04-01), Brown et al.
patent: 3588124 (1971-06-01), Guinard
patent: 3776558 (1973-12-01), Maurer et al.
patent: 3949150 (1976-04-01), Mason et al.

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