Sealing means between a pressurized chamber and a lubricated cha

Details Sealing means between a pressurized chamber and a lubricated cha Sealing means between a pressurized chamber and a lubricated cha

1993-03-02

1995-08-29

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 53, 277134, F16J 924

Patent

active

054453941

ABSTRACT:
A seal arrangement located between a lubricated chamber and a pressurized chamber pressurized by a gas at a variable pressure. The seal arrangement includes a seal around a shaft extending into the lubricated and pressurized chambers through a wall separating the chambers. The seal slides along the shaft between a first and a second abutment position via a variable pressure exerting a force on an end face, i.e., a casing, of the seal. The casing, the shaft and seal define a clearance allowing air to pass from the pressurized chamber to the lubricated chamber. Springs urge the seal toward the first abutment position against the variable pressure and have a strength so that, when the variable pressure is under a predetermined value, the clearance is sealed. When the variable pressure is over a predetermined value, the seal slides to the second abutment position and the clearance is opened to allow the pressurized gas to flow from the pressurized chamber to the lubricated chamber.

REFERENCES:
patent: 3021147 (1962-02-01), Haas et al.
patent: 3600048 (1971-08-01), Makhobey
patent: 4406460 (1983-09-01), Slayton
patent: 4426090 (1984-01-01), Bender
patent: 4722663 (1988-02-01), Swearingen
patent: 5039115 (1991-08-01), Hebert et al.
patent: 5169159 (1992-12-01), Pope et al.

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