Shut-off seal for a rotatable shaft

Details Shut-off seal for a rotatable shaft Shut-off seal for a rotatable shaft

1992-07-09

1994-04-19

Will, Thomas B.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 95, 277 38, F16J 1534

Patent

active

053039335

ABSTRACT:
A shut-off seal for a rotatable shaft penetrating a fluid-holding tank through an opening below the fluid surface. The shut-off seal has a collar secured to the shaft inside the tank and a positionable annular shut-off ring which may be moved into engagement with the collar. The invention enables leakage-free shutdown for servicing an associated rotary seal without moving the rotary seal axially along the shaft.

REFERENCES:
patent: 2390602 (1945-12-01), Maier
patent: 4106778 (1978-08-01), Cormack et al.
patent: 4419015 (1983-12-01), Liddiard
patent: 4511255 (1985-04-01), Saucier
patent: 4556222 (1985-12-01), Lewis et al.
patent: 4765631 (1988-08-01), Kohnen et al.
patent: 4795572 (1989-01-01), LaValley
patent: 4878677 (1989-11-01), Larkins et al.
patent: 5102151 (1992-04-01), Stolzenfeld
patent: 5224762 (1993-07-01), Levenstein

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