Patent ID: 7605340
Filing Date: 2009-10-20
Classification: H05H

Abstract:
1. A nozzle for a plasma arc torch comprising: a nozzle body having a hollow interior with a nozzle exit orifice at a distal end, the nozzle body having a cylindrical portion and a conical portion, the cylindrical portion having an interior surface; and a nozzle liner having a hollow interior and being disposed in the hollow interior of the nozzle body such that a liner orifice is aligned with the nozzle exit orifice, the nozzle liner having a cylindrical sections, the cylindrical section having an exterior surface a majority of which is in contact with the interior surface of the cylindrical portion of the nozzle body to form a thermal contact region, the thermal contact region dissipating heat between the nozzle liner and the cylindrical portion of the nozzle body via thermal conduction.