Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1990-02-06
1990-10-16
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
2940208, 29890124, 73201, 73431, 137 681, 137315, 138 97, 285 2, 285 30, 403 2, F16K 4300
Patent
active
049627848
ABSTRACT:
A valve device for use in a gas flow system which has a gas meter connected to a supply line. The valve device is especially made to break the threads of a riser pipe nipple that is screwed into the top outlet end. The valve device has an annular shoulder at the inlet and outlet ends and a passageway extends through the valve device and through the shoulders. A length of the outlet end of the passageway has internal threads at the outlet end that terminate at the shoulder. A smooth cylindrical marginal length of the inlet length of the passageway is spaced from a threaded portion of its length located intermediate the smooth part of the passageway and the valve element. The smooth cylindrical length has an inside diameter slightly greater than the outside diameter of the supply line so that a lateral load placed on the supply line is transferred into the valve device through the smooth part of the passageway and avoids breaking the supply line threads. When the system is impacted by a moving object, such as a vehicle, the piping of the system will preferentially break at the nipple located in the outlet threads while the pipe that is screwed to the inlet threads remains connected so that the valve element can be moved to the closed position to shut off the flow of gas from the broken system.
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Bates Marcus L.
Walton George L.
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