Plasma arc torch having extended nozzle of substantially hourgla

Details Plasma arc torch having extended nozzle of substantially hourgla Plasma arc torch having extended nozzle of substantially hourgla

1990-02-28

1991-05-07

Paschall, M. H.

Electric heating

Metal heating

By arc

21912149, 21912151, 21912148, 219 75, B23K 900

Patent

active

050138855

ABSTRACT:
A nozzle for use with a plasma arc torch having a first gas flow within the nozzle for engaging an electrode and generating a plasma and a second gas flow in surrounding engagement to the outer surface of the nozzle is disclosed. The nozzle includes an outer surface of substantially hourglass configuration in longitudinal cross-section so that the second gas remains in close contact with the outer hourglass surface of the nozzle to provide efficient heat transfer from the nozzle to the surrounding second gas flow.

REFERENCES:
patent: D299352 (1989-01-01), Spaulding et al.
patent: 3447322 (1969-06-01), Mastrup
patent: 4521666 (1985-06-01), Severance, Jr. et al.
patent: 4558201 (1985-12-01), Hatch
patent: 4580032 (1986-04-01), Carkhuff
patent: 4581516 (1986-04-01), Hatch et al.
patent: 4716269 (1987-12-01), Carkhuff
patent: 4748312 (1988-05-01), Hatch et al.
patent: 4777343 (1988-10-01), Goodwin

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