| Abstract |
The invention relates to a tubular nozzle for a plasma arc torch, said nozzle, having an axis and axially opposite ends, an end wall at one of said ends, an electrode in said nozzle having a nose end facing said end wall, said nose end and said end wall providing a plasma gas chamber and said end wall having a gas chamber outlet opening extending axially therethrough, said chamber having an entrance spaced radially outwardly of said outlet opening, means for flowing a plasma gas through said chamber in the direction from said entrance toward said outlet opening, and means for creating an arc between said nozzle and electrode for a plasma jet to flow through said outlet opening, the improvement comprising: rib means on said end wall of said nozzle for radially guiding the flow of said plasma gas from said entrance to said outlet opening. |