Fluid handling – Control by change of position or inertia of system
Patent
1997-08-12
1999-04-20
Michalsky, Gerald A.
Fluid handling
Control by change of position or inertia of system
137629, 251 65, F16K 1736
Patent
active
058948562
ABSTRACT:
A seismically triggered valve is designed to shut off gas supply during an earthquake. A valve member is pivoted within a valve body, the valve member being mechanically movable to the open position. A magnet is fixed to the valve member, and a ferromagnetic ball is free on a concave surface. The center of the concave surface is aligned with the magnet; but, when the valve is shaken, the ball moves and releases the magnet. The valve member moves by gravity, but is assisted by a spring bias towards the closed position. A control rod can engage the valve member to open the valve, and can mechanically close the valve if desired. Further, a bleed passage connecting the valve body with the outlet is controlled by the control rod selectively to bleed off pressure within the valve body. The valve body is formed integrally. with an open top, and the sensor is received within the open top to close the top and properly locate the sensor.
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patent: 5209454 (1993-05-01), Engdahl et al.
Dean Dale
Swenson Ralph R.
Michalsky Gerald A.
Middleton James B.
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