Indicating check valve

Details Indicating check valve Indicating check valve

1979-01-19

1980-07-15

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

200 82E, 137540, H01H 3538

Patent

active

042130212

ABSTRACT:
A valve apparatus having a poppet valve carrying a magnet and a switch responsive to movements of the magnet wherein the switch is activated and deactivated by movement of the magnet into and out of proximity with the switch. The spring biased poppet valve is movable from a closed position under the influence of a predetermined fluid flow rate in one direction to an open, switch activating position and then is returned upon a slight reduction in fluid flow in the opposite direction past the switch activating position to a switch deactivating position intermediate the latter and the valve closed position. The valve is formed with a specially configured nose portion to provide poppet valve travel at predetermined fluid flow rates to activate and deactivate the switch.

REFERENCES:
patent: 2930401 (1960-03-01), Cowan
patent: 2959188 (1960-11-01), Kepner
patent: 3327079 (1967-06-01), Widl
patent: 3580275 (1971-05-01), Hanson
patent: 3766779 (1973-10-01), Hoffman
patent: 3945396 (1976-03-01), Hengesbach
patent: 4071725 (1978-01-01), Smith

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