Patent ID: 6963045
Filing Date: 2005-11-08
Classification: H05H

Abstract:
1. A plasma arc cutting torch for directing a plasma arc from said torch to a workpiece, said torch comprising: a cutting torch body defining an axial bore; a cathode supported within said axial bore, the plasma arc transferred from said cathode to the workpiece through said axial bore along a central axis; a lead attachable to a workpiece in electrical communication with said cathode; and a nozzle removably supported on said cutting torch body and including an orifice in fluid communication with said axial bore, said nozzle including a body fabricated of a first material, said nozzle further including a second material defining said orifice, said nozzle focusing said plasma arc through said axial bore and said orifice along said central axis, said second material being a high heat resistant, electrically conductive metal electrically insulated from said cathode, the melting temperature of said second material being higher than the melting temperature of said first material.