Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1997-01-07
1998-09-22
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137111, 137599, 137606, F16K 1110
Patent
active
058100423
ABSTRACT:
A device for ensuring the safety of the oxygen and gas supply to a welding and cutting torch (4). The object of the device is to prevent accidental escape of oxygen and/or gas when the torch is not in use. For this purpose, the device is characterized in that the oxygen supply line and the gas supply line each contain a controlled regulating valve (10, 12), which valves are connected to a common control line (14). The oxygen supply line, downstream of the regulating valve (12), viewed in the direction of flow of the oxygen, contains a starting tank (20), and a flow-pressure switch (21) which operates a regulating slide valve (16) accommodated in the control line, said control line being in communication by way of the regulating slide valve and a line (30) with the part of the oxygen supply line situated upstream of said regulating valve (12).
The invention is also embodied in a flow-pressure switch, which is suitable in particular for use in the above device.
REFERENCES:
patent: 1213159 (1917-01-01), Dalen
patent: 2615464 (1952-10-01), Hughey
patent: 2840016 (1958-06-01), Chouinard et al.
patent: 3805819 (1974-04-01), Etter
patent: 4827965 (1989-05-01), Wates
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