B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/56, 327/57
B23K 9/20 (2006.01) B23K 9/29 (2006.01)
Patent
CA 2017034
Abstract of the Disclosure A welding apparatus for welding a new stud on to the end of a broken-off stud which comprises a conventional mig welding hose through which inert gas can pass and through which a mig welding wire can be fed, the hose having a conventional extension at one end thereof for attachment of a mig welding nozzle thereto, the extension also having a longitudinally extending contact tip guide attached thereto and through which the welding wire passes, the nozzle having an enlarged cylindrical portion which is received over the extension of the hose, and a reduced cylindrical portion extending over and beyond the contact tip guide in concentric relation thereto. The mig welding hose has a trigger for initiating the flow of inert gas through the hose and into the annular area between the guide and the nozzle, for supplying a d.c. welding voltage and for feeding the wire through the hose and through the contact tip guide. This invention constitutes an improvement wherein the cylindrical portion on the contact tip guide extending from the point of connection of the guide to the hose extension to the other end of the guide is of reduced external diameter as compared to the conventional contact tip guide. An insulating sleeve is received over the reduced external diameter portion of the guide. A new stud having a longitudinal bore extending from a rear end thereof to a location adjacent a forward end thereof where the bore flares outwardly to a larger bore at the forward end of the stud, the stud is received over the insulating sleeve. A shroud having an inner end received on the enlarged portion of the nozzle, has an outer end including a ring which is attached to the inner end of the shroud by means of a plurality of longitudinally extending legs, the length of the shroud being such that the ring extends just beyond the outer end of the stud when the latter is fully received on the guide.
Gowling Lafleur Henderson Llp
Preston Gary N.
LandOfFree
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