Earthquake relief valve

Details Earthquake relief valve Earthquake relief valve

1988-02-12

1989-04-18

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

By pendulum or swinging member

74 2, 74527, 251 74, F16K 1736

Patent

active

048217590

ABSTRACT:
This disclosure is directed to a vibration or shock-activated valve. A valve mounted for rotation in a gas line or the like is connected to an elongate handle by a valve stem. The valve is spring activated to rotate from an open to a closed position. The elongate handle engages and is restrained by a ball detent. The ball detent is normally urged into engagement with the elongate handle by a conical end of a pendulum member. When vibration or shock moves the pendulum, the ball detent releases the elongate handle permitting the spring loaded valve to rotate from the open to the closed position. A handle stop at 90.degree. stops the valve in the closed position.

REFERENCES:
patent: 2054563 (1936-09-01), Hansen
patent: 4546660 (1985-10-01), Bujold

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