METHOD AND APPARATUS FOR AUTOMATIC GAS CONTROL FOR A PLASMA ARCH TORCH

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United States of America Patent

SERIAL NO

12110250

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Abstract

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A method and apparatus for controlling a gas supply to a plasma arc torch uses a proportional control solenoid valve positioned adjacent the torch to manipulate the gas flow to the torch, thereby extending electrode life during arc transfer and shutdown. Swirl ring design can be simplified and gas supply and distribution systems become less complicated. The invention also allows manipulation of shield gas flow to reduce divot formation when making interior cuts. The system can be controlled with a digital signal processor utilizing a feedback loop from a sensor.

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Patent Owner(s)

Patent OwnerAddress
BANK OF AMERICA N A900 W TRADE STREET NC1-026-06-09 (MACLEGAL) CHARLOTTE NC 28255

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Best, Guy T Bethel, VT 11 201
Brandt, Aaron D Grantham, NH 19 486
Duan, Zheng Hanover, NH 53 829
Kamath, Girish R Lebanon, NH 16 247
Liebold, Stephen M Grantham, NH 26 678
Lindsay, Jon W Hanover, NH 39 950
Passage, Christopher S Canaan, NH 13 201
Selmer, Shane M Ascutney, VT 6 149

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