Fluid handling – Control by change of position or inertia of system – With second control
Patent
1995-02-27
1996-08-27
Hepperle, Stephen M.
Fluid handling
Control by change of position or inertia of system
With second control
2511494, F16K 1736
Patent
active
055491308
ABSTRACT:
A shutoff valve for a portable gas appliance to detect an upset or inverted disposition of the appliance and immediately stop all gas flow includes a valve body having an inlet port that is threaded to be secured directly to a compressed gas tank, and a stem extending outwardly therefrom to actuate the safety valve typically provided in the tank outlet. An internal bore extends within the valve body and includes a proximal end that joins the inlet port in generally coaxial fashion. The internal bore is adapted to be oriented preferably in an upright attitude. At the distal end of the bore a threaded female receptacle is formed. An O-ring seal concentrically within a medial portion of the bore, and a valve ball is translatably retained between the O-ring seal and the valve stem. If the appliance becomes upset or overturned, the valve ball will be driven gravitally to roll toward the O-ring seal. The ball will seat in the opening of the O-ring, blocking the flow path completely and shutting off all gas flow through the valve. A reset mechanism extends into the valve body to intersect a medial portion of the internal bore adjacent to the O-ring seal. The valve may be restored to operating condition by pushing a reset spindle inwardly, a pin at the inner end of the spindle contacting the valve ball and pushing the ball out of its seat in the O-ring seal.
REFERENCES:
patent: 3407827 (1968-10-01), Follett
patent: 3731718 (1973-05-01), Gramig
patent: 3850189 (1974-11-01), Follett
patent: 4155374 (1979-05-01), Diehl
patent: 4380428 (1983-04-01), Rozzi
patent: 5209252 (1993-05-01), Perle
patent: 5240025 (1993-08-01), Morris
Cohen Howard
Gas Guard West, Inc.
Hepperle Stephen M.
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