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Coolant tube for use in a liquid-cooled electrode disposed in a plasma arc torch

  • US 5,756,959 A
  • Filed: 10/28/1996
  • Issued: 05/26/1998
  • Est. Priority Date: 10/28/1996
  • Status: Expired due to Fees
First Claim
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1. A coolant tube for use in a liquid-cooled electrode in a plasma arc torch having a torch body and a coolant supply fluid dynamically coupled to the body, the tube comprising:

  • a hollow member having a first end, a second end and a coolant passage extending from the first end to the second end, the first end being secured within the torch such that the coolant passage is in fluid communication with the coolant supply; and

    a substantially solid member extending from the second end and having a primary flow restriction orifice and at least one additional flow restriction orifice extending therethrough, the primary flow restriction orifice and each additional flow restriction orifice being in fluid communication with the coolant passage and an interior surface of the electrode for providing a plurality of high velocity jets of coolant to the interior surface of the electrode.

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