US 11,850,689 B2
Welding device
Stefan Wolfsgruber, Pettenbach (AT); Philip Dörner, Pettenbach (AT); Andreas Starzengruber, Pettenbach (AT); Uwe Popp, Widnau (CH); and Klaus Bertsch, Frastanz (AT)
Assigned to HILTI AKTIENGESELLSCHAFT, Schaan (LI)
Appl. No. 17/416,453
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Nov. 29, 2019, PCT No. PCT/EP2019/083010
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/126404, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18213851 (EP), filed on Dec. 19, 2018.
Prior Publication US 2022/0072645 A1, Mar. 10, 2022
Int. Cl. B23K 9/20 (2006.01); B23K 9/16 (2006.01)
CPC B23K 9/201 (2013.01) [B23K 9/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for welding a welding stud to a specified location of a base material, comprising a stud holder, comprising an inert gas cover, which surrounds the stud holder while forming a gap between the stud holder and the inert gas cover, and comprising a projection device, which projects a visual pattern onto the base material through the gap.