<p>The present invention relates to arc welding torch and a method of extracting fume gas from a welding site. The torch comprises a metal electrode and at least one shield gas port adapted to direct a shield gas curtain around the metal electrode and a welding site. At least one shroud gas port is spaced radially outward from the shield gas port and adapted to impart to an exiting shroud gas a radially outward component of velocity. Fume gas is preferably extracted from a position radially intermediate the shield gas curtain and the shroud gas curtain.</p>
申请公布号
WO2007106925(A1)
申请公布日期
2007.09.27
申请号
WO2007AU00258
申请日期
2007.03.21
申请人
BOC LIMITED;UNIVERSITY OF WOLLONGONG;COOPER, PAUL;GODBOLE, AJIT;NORRISH, JOHN