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Plasma arc torch with vented flow nozzle retainer

  • US 6,084,199 A
  • Filed: 08/01/1997
  • Issued: 07/04/2000
  • Est. Priority Date: 08/01/1997
  • Status: Expired due to Term
First Claim
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1. A method of operating a shielded plasma arc torch comprising the steps of:

  • providing a flow of an ionizable gas to a torch body;

    passing the flow through a heat exchanger in thermal communication with an electrode disposed in the torch body;

    dividing the flow thereafter into;

    a first subflow for passage through a plasma chamber formed between the electrode and a nozzle to sustain a plasma arc;

    a second subflow for passage through a shield to shield the plasma arc; and

    a remaining flow; and

    venting the remaining flow to ambient remote from the plasma arc through at least one aperture formed in a nozzle retainer side wall.

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