Convertible, stand-by rotary seal assembly

Details Convertible, stand-by rotary seal assembly Convertible, stand-by rotary seal assembly

1985-04-30

1986-12-02

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 9, 277 32, 277 65, 277 93SD, F16J 1534

Patent

active

046259775

ABSTRACT:
A seal assembly has a pair of relatively rotatable sub-assemblies adapted to be attached and sealed respectively to relatively fixed and relatively rotatable members to confine the flow of fluid through the space between the members to a restricted passage. One of the sub-assemblies includes one of a pair of relatively rotatable seal rings. Coupling means are operable to selectively couple the other seal ring of the pair to a sub-assembly in a stand-by state in which the seal rings are not in relatively rotated engagement and, alternately, in a working state in which the seal rings are in relatively rotated engagement to seal the restricted passage. Preferably, the coupling means are operable while the sub-assemblies remain in respective installed positions; include means relatively movable to seal the opposed faces of the rings from the restricted passage in the stand-by state and to expose those faces to the passage in the working state, and are operable to couple the second seal ring alternatively to the respective sub-assemblies to provide the respective states of the seal rings. Preferably also, additional seal means are provided for sealing the restricted passage.

REFERENCES:
patent: 3090627 (1963-05-01), Tankus
patent: 3222075 (1965-12-01), Haeber
patent: 3441284 (1969-04-01), Murray et al.
patent: 3591188 (1971-07-01), Eisner
patent: 3675933 (1972-07-01), Nappe
patent: 3697088 (1972-10-01), Hummer
patent: 3727923 (1973-04-01), McEwen
patent: 3811687 (1974-05-01), Honold et al.
patent: 4008897 (1977-02-01), Wentworth
patent: 4127275 (1978-11-01), Champlin
patent: 4415165 (1983-11-01), Martini

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