Purge unit for welding apparatus
Welding torch for underwater welding
Method of underwater welding
Scavenger hood for laser
Underwater welding apparatus
Expandable purge unit
ApplicationNo. 07/056771 filed on 06/02/1987
US Classes:219/121.84, With fluid supply219/121.6, Using laser219/121.65Melting
ExaminersPrimary: Albritton, C. L.
Attorney, Agent or Firm
International ClassB23K 26/14 (20060101)
Foreign Application Priority Data1987-01-07 EP
AbstractA gas shroud comprises a chamber having a beam inlet, a gas inlet and an outlet portion. A shroud having an inner surface and an outer surface is operably associated with the outlet portion and is rotatable relative to the chamber. A drive system is operably connected to the shroud for rotating the shroud. A plurality of fins are positioned about the outer surface of the shroud and are rotatable therewith so that rotation of the shroud causes the environment surrounding the shroud to be expelled radially away therefrom.