Disaster activated shut-off valve

Details Disaster activated shut-off valve Disaster activated shut-off valve

1979-03-19

1981-07-14

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

With second control

137460, F16K 1736

Patent

active

042781027

ABSTRACT:
An automatic shut-off valve is used at the inlet point of a fuel line carrying a gaseous or liquid fuel into a house or the like, the valve being adapted to terminate the flow of gas or liquid upon the experiencing of a shock or vibration by the valve as would be produced by an earthquake, with the valve head being so positioned to be actuated by a sudden surge of flow to shut the valve in the event a ruptured gas line causes a quick inordinately rapid gas or liquid flow in the system. The principle utilized to actuate the closing of the valve as a function of a certain minimum amplitude of vibration or shock is a ball weight which in normal use rests on a pedestal which in turn maintains the valve head away from the valve seat in the supply line, this ball being designed to topple from its supporting pedestal during an earthquake or other vibration, thus freeing the valve head to seat under spring tension such as to block the fluid flow.

REFERENCES:
patent: 1260739 (1918-03-01), Yeamans
patent: 1302749 (1919-05-01), Yeamans
patent: 1405950 (1922-02-01), Stafford
patent: 1742685 (1930-01-01), Brandon
patent: 2615460 (1952-10-01), Crow
patent: 2615461 (1952-10-01), Crow
patent: 3407827 (1968-10-01), Follett
patent: 3994360 (1976-11-01), Leibold
patent: 4185651 (1980-01-01), Paulson

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