Fluid handling – Control by change of position or inertia of system
Patent
1989-12-15
1990-11-20
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
137557, 251 66, 25112904, F16K 1736
Patent
active
049710940
ABSTRACT:
A valve includes a housing having an inlet, an outlet, and a passageway that connects the inlet and the outlet in fluid communication. A valve member on the housing for opens and closes the passageway and an actuator on the housing that is responsive to movement such as may accompany an earthquake causes the valve member to close the passageway automatically in the event of such movement. The actuator may include a spring for driving the valve member from an open position to a closed position, and a trigger mechanism responsive to movement such as may accompany an earthquake for holding the valve member in the open position until the occurrence of such movement and then enabling the valve member to move to the closed position under influence of the driving means. A solenoid may also be provided on the housing for moving the valve member from the closed position to the open position in order to reopen the passageway, and a battery-powered microprocessor may be included on the housing for enabling a user to control the solenoid with a central computer that communicates over telephone lines with a plurality of valves located throughout the community.
REFERENCES:
patent: 3805818 (1974-04-01), Yamada
patent: 3994359 (1976-11-01), Smitley
patent: 4103697 (1978-08-01), Kiesow
patent: 4726055 (1988-02-01), Smith
patent: 4777383 (1988-10-01), Waller
Hanson Loyal M.
Nilson Robert G.
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