Device for a welding torch

Details Device for a welding torch Device for a welding torch

1986-01-31

1988-08-02

Sheehan, John P.

Metallurgical apparatus

Means for cutting solid metal with heat, e.g., blowpipes

266 74, B23K 700

Patent

active

047609940

ABSTRACT:
A safety arrangement useful in burning and cutting torches and like devices wherein the torch utilizes an oxidizer medium and a fuel which is supplied to the torch at selected pressure and where the fuel and oxidizing medium are independently provided to the torch and mixed therein where the present invention includes a valve assembly having two spool valves moveable within the valve assembly and where the valve assembly receives the oxidizer media, the fuel media, and a extinguisher medium which is supplied at least a selected pressure to hold the spool valve assembly in a first mode so that oxidizer means and fuel medium can be supplied through the valve assembly to the torch and where upon reduction of the pressure of the extinguisher medium below a selected pressure the valve assembly reverts to a second mode and where the flow of oxidizer medium and the flow of fuel medium are shut off and where in the event of a fire the spool assembly can be moved to the second mode and the extinguisher medium supplied through the torch to extinguish the fire.

REFERENCES:
patent: 4062495 (1977-12-01), Luck
patent: 4093191 (1978-06-01), Ferguson

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