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

1985-02-15

1986-12-30

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 343, 277 59, 277 75, 277173, 440112, F16J 1540, F16J 1548

Patent

active

046324038

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 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 the pressure of the fluid.

REFERENCES:
patent: 3121570 (1964-02-01), Gilbert
patent: 3474734 (1969-10-01), Stogner
patent: 3578342 (1971-05-01), Satterthwaite
patent: 3625523 (1971-12-01), Gardner
patent: 3726531 (1973-04-01), Pagan et al.
patent: 3854732 (1974-12-01), Franz et al.
patent: 3934952 (1976-01-01), Gardner
patent: 4395141 (1983-07-01), Pietsch et al.

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