| 摘要 |
An inert gas welding torch comprising; a torch body, a collet, an electrode, a nozzle, the nozzle having an upper and lower end, the upper end of the nozzle being connected to the torch body, the collet connected to the torch body and the electrode connected to the collet with the electrode extending through and out the lower end of the nozzle, a path for inert gas starting from a gas supply line and passing through the torch body to the upper end of the nozzle, the gas then passing through at least three gas portals with the gas portals having an inlet and an outlet, the inlet being located at the upper end of the nozzle and the outlet toward the lower end of the nozzle, the portals having substantially uniform dimensions from the inlet to the outlet, wherein the length of the gas portal is at least as long as the longest line that can be drawn across the area of the gas portal inlet.
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