Emergency seal

Details Emergency seal Emergency seal

1982-04-01

1984-05-22

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

251 1R, 277 9, E21B 3306, F16J 900

Patent

active

044497199

ABSTRACT:
A safety seal for a shaft passing through a housing. The seal is normally maintained in a non-sealing relationship to the shaft, but may be actuated during emergency conditions by levers. The seal includes an annular, split housing having a radially extending compartment which contains at least two seal members which are held together by a bias to define a seal annulus. The seal members are radially contracted into sealing engagement and expanded to a non-sealing position by cams or levers mounted in the seal members.

REFERENCES:
patent: 1877268 (1932-09-01), Cole
patent: 3318605 (1967-05-01), Brown
patent: 3948531 (1976-04-01), Mitrani
patent: 3994472 (1976-11-01), Williams
patent: 4332367 (1982-06-01), Nelson

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