Earthquake actuated horizontal valve with micro switch

Details Earthquake actuated horizontal valve with micro switch Earthquake actuated horizontal valve with micro switch

2006-12-26

2006-12-26

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Processes

C137S039000, C137S045000, C137S046000, C137S554000, C251S232000

Reexamination Certificate

active

07152615

ABSTRACT:
An earthquake actuated device includes a flapper-valve adapted to block a gas flow and a micro switch for closing or opening a circuit. A seismic sensor responds to accelerations characteristic of an earthquake. The sensor cooperates with a magnet in a flapper arm to hold the flapper-valve open. When the sensor experiences sufficient motion, the flapper arm is released and the flapper-valve falls onto a seat, thereby closing and blocking the gas flow. The closing of the flapper-valve is further coupled into an actuation of the micro switch, thereby opening or closing the circuit.

REFERENCES:
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patent: 5307699 (1994-05-01), Engdahl et al.
patent: 6112764 (2000-09-01), Engdahl et al.
patent: 6343615 (2002-02-01), Miller et al.

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