Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1984-10-29
1985-12-03
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 64, F16J 1506
Patent
active
045562229
ABSTRACT:
A typical fluid mixer of the heavy-duty type conventionally has a compartment including walls, one of which has a circular opening through which a motor-driven shaft extends. An external seal is provided for sealing the shaft-to-wall junction against fluid leakage. When it becomes necessary to replace the seal, the compartment must be drained to avoid leakage at the opening. The present invention provides an internal seal that is normally spaced along the shaft away from the wall but which can be forcibly moved toward and compressed against the wall and thus seal the shaft and opening and preventing leakage during repairs and consequently eliminating emptying the tank. The interior seal is supported by a movable carrier, and reversible force-exerting mechanism extending exteriorly of the compartment is employed to move the carrier and interior seal into and out of its interior sealing position. In a preferred embodiment, the force-exerting mechanism includes one or more jack screws.
REFERENCES:
patent: 4161316 (1979-07-01), Nowack et al.
patent: 4383768 (1983-05-01), Kupka
patent: 4521040 (1985-06-01), Slyker et al.
Lewis Delmar D.
Lewis Donald E.
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