Contoured shield orifice for a plasma arc torch

Details Contoured shield orifice for a plasma arc torch Contoured shield orifice for a plasma arc torch

2006-08-25

2010-06-15

Paschall, Mark H (Department: 3742)

Electric heating

Metal heating

By arc

C219S075000, C219S121510, C219S121520, C219S121480

Reexamination Certificate

active

07737383

ABSTRACT:
A component for use in a plasma arc torch is provided that includes a continuously contoured surface extending along the component that directs a flow of shield gas at a predetermined angle to result in a specific pierce or cut location on a workpiece. In one form, the component is a shield cap that includes an exit orifice extending through a central portion of the shield cap, the exit orifice defining an inlet portion and an outlet portion, and a continuously contoured surface extending between the inlet portion and the outlet portion. The continuously contoured surfaces may be convergent, divergent, or a combination of convergent and divergent according to the principles of the present disclosure. Additionally, the shield cap may comprise a single, unitary piece or alternately a plurality of pieces or components.

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