Dale G Dean

US Patent:

58948562, Apr 20, 1999

Filed:

Aug 12, 1997

Appl. No.:

8/909900

Inventors:

Ralph R. Swenson - Coulterville CA
Dale Dean - Burbank CA

International Classification:

F16K 1736

US Classification:

137 38

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.

US Patent:

D434090, Dec 29, 1998

Filed:

Oct 17, 1997

Appl. No.:

D/078059

Inventors:

Dale Dean - Burbank CA
Ralph R. Swenson - Coulterville CA

International Classification:

2301

US Classification:

D23233