Sealing device for shafts

Details Sealing device for shafts Sealing device for shafts

1978-05-01

1980-05-27

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 59, 277 71, F16J 1540

Patent

active

042046890

ABSTRACT:
A sealing device is provided for shafts passing through the wall of a housing containing a pressurized medium of a pressure differing from that of the environment external to the housing. The sealing device includes at least one ring of packing or sealing material formed in at least one annular layer around the outer surface of the shaft. A nonrigid sleeve is mounted around the outer surface of the ring of packing material. The sealing device further includes a duct for providing a source of pressurized medium to the outer surface of the nonrigid sleeve. The forces exerted by the pressurized medium on the outer surface of the sleeve are transmitted to the layer of packing material enclosed within the sleeve so that the packing material is maintained pressed in a close sealing relationship with the outer surface of the shaft.

REFERENCES:
patent: 2273129 (1942-02-01), Messinger
patent: 2731282 (1956-01-01), McManus et al.
patent: 2871072 (1959-01-01), Parks et al.
patent: 3268232 (1966-08-01), Richards
patent: 3400937 (1968-09-01), Crankshaw
patent: 3514113 (1970-05-01), Weiswurm
patent: 3637222 (1972-01-01), Wilkinson
patent: 3685840 (1972-08-01), Henry
patent: 3831950 (1974-08-01), Bentley et al.
patent: 3887199 (1975-06-01), Sundqvist
patent: 4014555 (1977-03-01), Jacottet

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