Patent ID: 8129654
Filing Date: 2012-03-06
Classification: H05H

Abstract:
1. A DC arc plasmatron comprising: a rod cathode, a nozzle anode having a body member and a through axial orifice, a power supply unit connected to both of the rod cathode and the nozzle anode, and a gas system for feeding plasma-forming gas into a space between the rod cathode and the nozzle anode and supplying suitably selected functional gas into the anode orifice through an internal opening communicating with said anode orifice and positioned between inlet and outlet parts of said anode orifice, wherein said internal opening is configured as an annular gap between said inlet and outlet parts of said anode orifice, while said annular gap has a predefined size relative to a diameter of the inlet part of said anode orifice and the outlet part of said anode orifice has a predefined diameter relative to the diameter of the inlet part of said anode orifice, wherein said anode is configured such that the ratio of the size G of said annular gap to the diameter A of the inlet part of said anode orifice is between 0.3 to 3.