Pilot operated fluid control valve

Details Pilot operated fluid control valve Pilot operated fluid control valve

1979-02-12

1981-02-03

Rosenthal, Arnold

Valves and valve actuation

Heat or buoyancy motor actuated

251 45, F16K 31385, F16K 3140

Patent

active

042484022

ABSTRACT:
A valve body defines an inlet and an outlet with a valve seat therebetween. A flexible diaphragm valve member has an outer portion supported by the valve body and a movable inner portion which cooperates with the valve seat to control the flow of liquid from the inlet to the outlet. A small bleed hole extends through the diaphragm valve member and provides a limited flow of liquid which is adapted to be vented to the outlet through a slightly larger vent passage defined by the valve body. The vent passage is opened and closed by over-center snap movement of a concaved bimetal disc positioned within the vent passage. The disc is heated by a small electric resistance coil when it is desired to open the valve, and when the coil is deenergized, the disc is cooled by the liquid flowing within the vent passage.

REFERENCES:
patent: 3763881 (1973-10-01), Jones
patent: 3799496 (1974-03-01), Esten
patent: 3856259 (1974-12-01), Doherty, Jr.
patent: 3873059 (1975-03-01), Meckstroth
patent: 4027848 (1977-06-01), Mundil

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