Anti-flashback cutting torch

Details Anti-flashback cutting torch Anti-flashback cutting torch

1982-09-24

1983-11-08

Stallard, W.

Metallurgical apparatus

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

B23K 700

Patent

active

044138091

ABSTRACT:
In a cutting torch having a torch head, a body having a fuel inlet and an oxygen inlet, control means connected to the body for controlling the flow of fuel and oxygen, a preheat tube assembly and a cutting oxygen tube assembly connected between the body and the head, the improvement in the preheat tube assembly for preventing flashback. An inner tubular member, preferably of brass, has a straight through bore with a fluid tight seal at the torch head by being threaded into the torch head and sealed with an O-ring seal. The opposite end connects to the body having a seal making a gas tight connection around a fuel passageway. The inner bore acts as an oxygen mixing chamber with no restrictions or orifices and consists of a single size diameter hole lengthwise through the member. Intermediate of the member is a plurality of spaced holes drilled through the member between the fuel passageway and the oxygen bore to allow the flow of fuel to be aspirated into the inner oxygen mixing chamber bore and carried to the torch head.

REFERENCES:
patent: 4022441 (1977-05-01), Turney
patent: 4030710 (1977-06-01), Turney

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