Patent ID: 9457418
Filing Date: 2016-10-04
CPC Classification: B23K

Claim Text:
1. A gas-cooled welding gun for an arc welding device comprising: a current contact tube formed of an electrically conductive material, inside of which a wire guiding channel for a welding wire is formed; an outer tube that surrounds the current contact tube; an intermediate space formed between the current contact tube and an inner wall of the outer tube; wherein the inner wall of the outer tube is formed of an electrically conductive material; and wherein the intermediate space is formed as a continuous conduit for a shielding gas; and spacers disposed between the current contact tube and the inner wall of the outer tube electrically insulating the current contact tube and the outer tube from one another, wherein the spacers have intermediate openings defined therein in order to allow the shielding gas to pass through the spacers each have a first annular section resting on an outside of and enclosing the current contact tube, and a second annular section resting on an inside of the outer tube, and spoke-like connecting crosspieces connect the first and second annular sections together and the intermediate openings are defined by the first and second annular sections and the spoke-like connecting crosspieces, and wherein the spacers are only disposed in partial regions of the intermediate space and in the remaining regions, the current contact tube with the surface of the electrically conductive material is exposed in the intermediate space, and that, in at least part of the remaining regions in which the current contact tube lies with the surface of the electrically conducting material exposed towards the intermediate space, structures that increase the surface area are provided on the current contact tube; and wherein the shielding gas cools the welding gun.