Gas valve

Details Gas valve Gas valve

1976-04-05

1978-01-10

Rosenthal, Arnold

Valves and valve actuation

Heat or buoyancy motor actuated

251 75, 236 48R, 236DIG21, 236101E, F16K 3102, F03G 706

Patent

active

040675394

ABSTRACT:
A gas valve has a thermally responsive actuator and an electric heater for heating the actuator normally to produce a displacement output that moves a constrained spring to an over-center position in order to snap open the valve poppet.
Portions of the actuator and the poppet holder are aligned such that the actuator portion will interferingly engage the poppet holder portion to move the poppet to its closed position when the heater receives an excessive electric power input causing an excessive mechanical displacement output of the actuator.

REFERENCES:
patent: 1643255 (1927-09-01), O'Dowd
patent: 2783946 (1957-03-01), Lansky et al.
patent: 3229956 (1966-01-01), White
patent: 3330479 (1967-07-01), Vollprecht
patent: 3682382 (1972-08-01), Katchka
patent: 3955791 (1976-05-01), Meckstroth

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