Combined pressure cutoff and pressure relief valve

Details Combined pressure cutoff and pressure relief valve Combined pressure cutoff and pressure relief valve

1989-04-17

1990-08-14

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 6108, 200 83W, 200306, H01H 3534

Patent

active

049489313

ABSTRACT:
A combined pressure cutoff and pressure relief valve includes a normally closed switch movable between closed and open contact positions. A normally closed pressure relief vent is located in a common housing with the switch. A pressure responsive diaphragm applies force to a switch snap disc and a vent snap disc. Under high pressure conditions, the switch snap disc snaps and opens a pair of contacts. In the event an abnormal pressure condition occurs, the vent snap disc operates and causes a pin to rupture the diaphragm for opening the relief vent.

REFERENCES:
patent: 2075305 (1937-03-01), Sayre
patent: 3585328 (1971-06-01), Fiore et al.
patent: 4091249 (1978-05-01), Huffman
patent: 4117287 (1978-09-01), Walker
patent: 4150266 (1979-04-01), Patrichi
patent: 4191870 (1980-03-01), Yanagisawa
patent: 4243858 (1981-01-01), Place
patent: 4400601 (1983-08-01), Brucken
patent: 4645888 (1987-02-01), Barkan et al.
patent: 4794214 (1988-12-01), Sanford

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