Packoff and seal ring assembly with injected plastic packing

Details Packoff and seal ring assembly with injected plastic packing Packoff and seal ring assembly with injected plastic packing

1981-11-23

1983-04-26

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 277226, 285 96, 285297, F16J 1546, F16L 1702

Patent

active

043811140

ABSTRACT:
A packoff for sealing between an external cylindrical surface and a member therearound having a resilient ring, metal seal rings on the end surfaces of the resilient ring, the exterior of the resilient ring being concave to provide an annular recess, means for injecting and pressurizing plastic packing in said annular recess to cause sealing engagement of said metal seal rings and means to prevent leakage of pressure from the annular recess, and the inner and outer flanges on said metal seal rings providing a metal-to-metal seal.

REFERENCES:
patent: 2099722 (1937-11-01), Byers
patent: 3258271 (1966-06-01), Hollingsworth
patent: 3860270 (1975-01-01), Arnold
patent: 4153656 (1979-05-01), Bunyan

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