Earthquake responsive valve

Details Earthquake responsive valve Earthquake responsive valve

1977-10-14

1979-08-28

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

F16K 1736

Patent

active

041657586

ABSTRACT:
An earthquake responsive valve having a lever structure which is mounted to swing about an axis and has two arms projecting in different directions and carrying two weights respectively balanced against one another in a relation such that one of the weights normally overbalances the other and retains the valve in open position but is displaceable by earthquake forces to an inactive position releasing the lever structure for valve closing movement.

REFERENCES:
patent: 1742685 (1930-01-01), Brandon
patent: 3890993 (1975-06-01), MacNeilage
patent: 4007643 (1977-02-01), Matsushita

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