Improved welding torch and method of use
CA 2282340 A1 · Owner: O'Neill, David Royd · Inventors: O'Neill, David Royd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention comprises a method of arc welding and apparatus associated with the method. Preferred embodiments deliver welding wire from an associated autofeed source along a substantially straight path and into the weld zone. The resistance of the wire to further travel within the weld zone results in the torch assembly being propelled along the workpiece at a constant speed proportional to the rate of wire feed. This allows high quality welds substantially free of waves or ridges to be consistently made and at high speeds - 1000 mm per minute - being achieved in trials. The invention also addresses some problems associated with the welding of difficult materials or , when heavier …
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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 February 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 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.