Valve

Details Valve Valve

1974-10-29

1976-05-18

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 45, F16K 31385, F16K 3140

Patent

active

039572447

ABSTRACT:
A valve includes a membrane carrying a clack, an inlet and an outlet of the valve facing one face of the membrane whereby the valve can be seated to close the outlet. A main or pilot operated chamber delimited by the other face of the membrane permanently communicates with the inlet via a first passage, and may communicate with the outlet via a second passage of greater cross-sectional area than the first. When the main valve is seated to close the valve, temporary opening of the second passage for example by an electromagnet reduces the pressure in the chamber and thus actuates opening of the valve and the valve. A third passage, of greater cross-sectional area than the first, and also communicating the chamber with the outlet, is opened in response to opening of the valve and is held open against the action of a biasing spring as long as liquid flows through the valve. If the throughflow drops, the valve closes the valve. The valve can also be closed by opening a fourth passage, of greater cross-sectional area than the third, communicating the inlet with the chamber.

REFERENCES:
patent: 1595755 (1926-08-01), Brooks et al.
patent: 2102076 (1937-12-01), Johnson
patent: 3282552 (1966-11-01), Sommese, Sr.

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