Combination switch and valve device

Details Combination switch and valve device Combination switch and valve device

1981-09-01

1983-08-23

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Plural switch

200 83Q, 200 83W, H01H 3534

Patent

active

044006012

ABSTRACT:
A combination high pressure switch-low pressure switch and high pressure relief valve control device is disclosed having series connected high and low pressure switches which are held closed to complete a control circuit in a normal pressure operating range and are respectively responsive to pressures above and below this range to open the control circuit. A high pressure relief valve is also integrated into the control device and operates to provide high pressure relief to atmosphere at pressures substantially above the high pressure switch actuating pressure.

REFERENCES:
patent: 3005888 (1961-10-01), Putz
patent: 3585328 (1971-06-01), Fiore
patent: 3633380 (1972-01-01), Pellizzetti
patent: 3702065 (1972-11-01), Jacobs
patent: 3765191 (1973-10-01), Canter
patent: 4133186 (1979-01-01), Brucken
patent: 4191870 (1980-03-01), Yanagisawa

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