Modulated spray mig welding process and device
CA 2250506 A1 · Owner: La Soudure Autogene Francaise · Inventors: Matile, Olivier; Plottier, Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process and device for MIG welding with gas shielding and modulated spray regime for aluminum particularly aluminum alloys or stainless steels in which the current is modulated at a modulation frequency below 60 Hz. The shielding gas contains at least 90% helium argon or one of their mixtures, and not more than 1.95% of a minority gaseous compound either oxygen or carbon dioxide. This process makes it possible to obtain effective degassing of most of the diffusible hydrogen that is likely to be in the puddle of molten metal and to improve the quality aspect of the weld beads so achieved on parts or equipment intended for the rail transport naval, aeronautics, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.