Piloted valve

Details Piloted valve Piloted valve

1987-10-01

1988-05-24

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 38, 251282, F16K 3102

Patent

active

047460938

ABSTRACT:
The piloted valve has three abutment surfaces for controlling the positions of the pilot lid and main lid. The abutment surfaces are disposed relative to each other so that the maximum stroke of the pilot lid relative to the casing is greater than the maximum stroke of the pilot lid relative to the main lid and less than the sum of the maximum stroke of the pilot lid and the maximum stroke of the main lid relative to the casing. With the pilot lid open and the main lid closed, a large flow cross-section is available; however, closing of the pilot lid with the main lid open requires only a very short stroke. The resulting valve operates very rapidly.

REFERENCES:
patent: 747777 (1903-11-01), Martin
patent: 1605380 (1926-11-01), Wagner
patent: 1989341 (1935-01-01), Shenton
patent: 2379181 (1945-06-01), Pontius, 3rd et al.
patent: 2479359 (1949-08-01), Holt
patent: 2575272 (1951-11-01), Harris
patent: 2624542 (1953-01-01), Ghormley
patent: 2968464 (1961-01-01), Olson
patent: 4304264 (1981-12-01), McClintock et al.
patent: 4679765 (1987-07-01), Kramer et al.
patent: 4699351 (1987-10-01), Wells

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