Emergency shut-off valve

Details Emergency shut-off valve Emergency shut-off valve

1977-01-05

1978-05-30

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

F16K 1736

Patent

active

040918319

ABSTRACT:
A gas shut-off valve for utilization in private houses, public buildings, factories, or any other installation where gas is used and there is a probability of an earthquake. The valve is mounted on a solid base either part of the building or specifically provided for the valve. Inlet and outlet gas lines are connected to the valve body. Inside the valve body a ball is positioned on top of a circular support. The diameter of the support is proportional to the diameter of the ball and to a selected horizontal acceleration which is considered structurally damaging. When due to an earthquake the valve is accelerated horizontally beyond the selected value the ball will be unseated from its support and roll down an incline until it plugs the gas outlet hole. The ball can be repositioned on top of the support by a mechanism actuated from outside the valve.

REFERENCES:
patent: 1742685 (1930-01-01), Brandon
patent: 2215044 (1940-09-01), Kammerdiner
patent: 3768497 (1973-10-01), Mueller

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