Electric heating – Metal heating – By arc
Patent
1993-11-22
1995-05-02
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912149, 21912151, 21912139, 21912148, B23K 1000
Patent
active
054121736
ABSTRACT:
A plasma gun assembly for use in high temperature environments couples electrode and cooling water supplying hoses to a plasma gun via an extension arrangement having a conductive cathode extension tube coaxially disposed within a conductive anode extension tube. The cooling water flows through the hollow interior of the cathode extension tube to the plasma gun, then returns from the plasma gun via a passage formed between the outside of the cathode extension tube and the interior wall of the anode extension tube. In this manner the anode and cathode extension tubes are cooled as well as the plasma gun. Powder and plasma gas are supplied to the plasma gun by water-cooled tube arrangements in which such tubes are surrounded by intermediate and outer tubes forming separate passages. Cooling water is coupled via fittings to flow through the passages formed by the intermediate and outer tubes to provide cooling.
REFERENCES:
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patent: 3914573 (1975-10-01), Muehlberger
patent: 4328257 (1982-05-01), Muehlberger
patent: 4423304 (1983-12-01), Bass et al.
patent: 4445021 (1984-04-01), Irons et al.
patent: 4587397 (1986-05-01), Camacho et al.
patent: 4656330 (1987-04-01), Poole
patent: 4668853 (1987-05-01), Fey et al.
Electro-Plasma, Inc.
Paschall Mark H.
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