Flow shut off valve

Details Flow shut off valve Flow shut off valve

1974-10-09

1976-07-13

Schwadron, Martin P.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

137553, F16K 1722, F16K 3700

Patent

active

039688135

ABSTRACT:
A novel emergency flow shut off device for fluid control systems particularly adapted for use in adverse marine environments. In normal operation the valve spool is continuously exercised by a reversing fluid pressure differential as fluid reversibly flows through the valve. External means are provided to conveniently monitor movement of the spool and thereby assure that the spool is free to shut off flow in a sudden emergency. Fluid cushioning means are provided at the end of the spool emergency shut off stroke to prevent damage to the valve. In a typical application the vertical motion of an offshore drill ship on the ocean swells causes oscillating flow in the fluid control system thereby automatically exercising the valve.

REFERENCES:
patent: 2410984 (1946-11-01), Lawless
patent: 3106992 (1963-10-01), Sherburne
patent: 3255850 (1966-06-01), Gray
patent: 3552433 (1971-01-01), Mason
patent: 3561574 (1971-02-01), Dickinson, Jr.
patent: 3602104 (1971-08-01), Stremple
patent: 3739808 (1973-06-01), Landherr
patent: 3760840 (1973-09-01), Gates

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