Earthquake-responsive valve motor

Details Earthquake-responsive valve motor Earthquake-responsive valve motor

1983-11-18

1985-10-15

Nilson, Robert G.

Machine element or mechanism

Automatic operation or control

137 45, 185 29, 185 37, 251 74, 251313, 267156, F16K 1736

Patent

active

045466602

ABSTRACT:
An automatic valve motor for shutting off utilities, such as gas, in the event of an earthquake. The valve motor is self-contained and can be mounted by unskilled persons on a conventional residential gas installation adjacent the main valve without modifying the valve or interfering with the operation of the gas line. An omnidirectionally movable pendulum acting on a pivotal latch is used to release for rotation a wheel whose hub has a key slot which engages the actuator bar of the gas valve. The wheel is driven by a linear spring arrangement which exerts a generally tangential turning force on the wheel for maximum leverage throughout an arc of rotation of about 90.degree..

REFERENCES:
patent: 2899193 (1959-08-01), Foster
patent: 3491602 (1970-01-01), New
patent: 3791396 (1974-02-01), Nelson
patent: 4161183 (1979-07-01), Berry
patent: 4429704 (1984-02-01), Jones

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