Seal for sealing between two telescopic tubes and sealing device

Details Seal for sealing between two telescopic tubes and sealing device Seal for sealing between two telescopic tubes and sealing device

1978-09-15

1979-12-25

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 343, 141312, B65B 304, F16J 1500

Patent

active

041802721

ABSTRACT:
A sealing device for sealing between two telescopic tubes which in one relative position come to rest one on the other, the device comprises an inflatable seal disposed between said tubes and means for supplying fluid to said seal to inflate said seal, which means is controlled by the force arising when one tube comes to rest and bears on the other tube. The means for inflating the seal may comprise a jack which is connected to the seal and subject to the weight of one of the tubes when it comes to bear on the other tube.

REFERENCES:
patent: 1319464 (1919-10-01), Durbin
patent: 1803665 (1931-05-01), Dennis
patent: 2369823 (1945-02-01), Freed
patent: 2458631 (1949-01-01), Parks
patent: 2648554 (1953-08-01), Gilbert
patent: 3103958 (1963-09-01), Rath
patent: 3951684 (1976-04-01), La Prad et al.
patent: 4068852 (1978-01-01), Anglade
patent: 4082298 (1978-04-01), Sanford

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