Sealed universal movement of a shaft extending between environme

Details Sealed universal movement of a shaft extending between environme Sealed universal movement of a shaft extending between environme

1988-07-07

1989-05-30

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 3, 277DIG7, 7386483, 414292, F16J 1516

Patent

active

048343943

ABSTRACT:
Apparatus includes a mounting member having a bore which closely receives the shaft and a counterbore in which two elastic O-rings separated by an annular element are received. A first compression member threadably engages the mounting member to apply axial pressure to the O-rings, which are radially compressed against the shaft by bevelled annular surfaces which capture the O-rings. This provides an environmental seal effective for a vacuum while still permitting axial and rotational movement of the shaft. Apparatus further includes a ball member fixed to the mounting member and received against an O-ring in a socket member. A second compression member threadably engaging the socket member to urge the ball member against the seal to provide additional sealing while permitting pivotal movement of the shaft.

REFERENCES:
patent: 2553938 (1951-05-01), Peirce
patent: 3410672 (1968-11-01), De Lajarte
patent: 3643511 (1972-02-01), Warncke et al.
patent: 3888300 (1975-06-01), Guichard et al.
patent: 3910428 (1975-10-01), Peterson
patent: 3984719 (1976-10-01), Grasis et al.
patent: 4067697 (1978-01-01), Polaschegg
patent: 4140228 (1979-02-01), Hathaway et al.
patent: 4174842 (1979-11-01), Partus

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