Method and device for mounting and withdrawing a plasma torch re

Details Method and device for mounting and withdrawing a plasma torch re Method and device for mounting and withdrawing a plasma torch re

1989-09-26

1991-03-05

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1022, 266 47, 266265, 266271, 373 18, C22B 900, H05H 126

Patent

active

049974750

ABSTRACT:
A method and device for forming a modifiable closed volume (16) by means of an extensible and retractable tubular element (16) fixed around the orifice of a sleeve (3) closed by a valve (5) on the upstream side of the valve, and detachably fixed around the nose (12) of the torch (4), and balancing the pressure in the volume (16) on the upstream side of the valve with the pressure prevailing on the downstream side of the valve by a device (20, S), opening the valve and reducing the volume (16) by advancing to the mounted position the nose (12) of the torch and locking the torch (4) on a sealing element (7) of the sleeve.

REFERENCES:
patent: 4638489 (1987-01-01), Thornblom et al.
patent: 4670048 (1987-06-01), Pineau
patent: 4769065 (1988-09-01), Dighe et al.

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