Stern tube seal device providing a seal about a rotatable shaft

Details Stern tube seal device providing a seal about a rotatable shaft Stern tube seal device providing a seal about a rotatable shaft

1984-03-26

1985-08-13

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 34, 277 59, 277 75, 277173, F16J 1532, F16J 1540, F16J 1548

Patent

active

045345694

ABSTRACT:
A stern tube seal device providing a seal about a rotatable shaft includes an annular case member arranged about the outer periphery of a shaft, a gap between the annular case member and the shaft is sealed by a plurality of lip seals, a floating ring seal or a pressure type hollow ring is arranged in the middle of the lip seal, and pressure fluid is charged into the rear portion of the floating ring seal or into the pressure type hollow ring to enhance the sealing effect by pressure of the fluid.

REFERENCES:
patent: 3403915 (1968-10-01), Roberts
patent: 3413008 (1968-11-01), Greiner
patent: 3474734 (1969-10-01), Stogner
patent: 3625523 (1971-12-01), Gardner et al.
patent: 3726531 (1973-04-01), Pagan et al.
patent: 3854732 (1974-12-01), Franz et al.

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