Plasma arc torch and method for cutting a workpiece
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United States of America Patent
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Jan 8, 2002
Grant Date -
Oct 4, 2001
app pub date -
Jan 29, 2001
filing date -
Feb 8, 2000
priority date (Note) -
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Abstract
A plasma arc torch and method for cutting a workpiece in which the torch has a primary gas flow path for receiving a primary working gas and directing it through the torch to a central exit opening of the torch for exhaustion from the torch onto the workpiece in the form of an ionized plasma. A secondary gas flow path in the torch receives a secondary gas separate from the primary working gas and directs it through the torch. The primary gas flow path is in fluid communication with the secondary gas flow path substantially upstream of the central exit opening of the torch to bleed primary working gas in the primary gas flow path into the secondary gas flow path for admixture therewith to form a secondary gas mixture to be exhausted from the torch.
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