Plasma arc torch

Details Plasma arc torch Plasma arc torch

1998-11-02

1999-10-12

Paschall, Mark

Electric heating

Metal heating

By arc

21912151, 219 75, 21912148, 31323131, B23K 1000

Patent

active

059650400

ABSTRACT:
A plasma torch comprises a tubular nozzle having an end wall and an electrode in the nozzle having a nose end facing the end wall. The nose end and end wall provide a plasma gas chamber, and the end wall has a gas chamber outlet opening extending axially therethrough. The gas chamber has an entrance radially outwardly of the outlet opening and the end wall has a plurality of arcuate ribs thereon circumferentially spaced apart about said outlet opening and providing a plurality of arcuate gas directing channels for radially guiding the flow of plasma gas in a swirling flow pattern from the entrance to the outlet opening. The nozzle and nozzle mounting components provide an improved arrangement for cooling the torch tip and producing a gas shield about the plasma jet.

REFERENCES:
patent: 3366772 (1968-01-01), Wickham
patent: 3450926 (1969-06-01), Kiernan
patent: 4682005 (1987-07-01), Marhic
patent: 4902871 (1990-02-01), Sanders
patent: 4973816 (1990-11-01), Haberman
patent: 5013885 (1991-05-01), Carkhuff
patent: 5164568 (1992-11-01), Sanders
patent: 5235155 (1993-08-01), Yamada
patent: 5296668 (1994-03-01), Foreman
patent: 5451739 (1995-09-01), Nemchinsky
patent: 5514848 (1996-05-01), Ross
patent: 5591356 (1997-01-01), Sakuragi
patent: 5681489 (1997-10-01), Carkhuff

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