Method of arc welding under water
CA 1067159 A · Owner: Boc Limited · Inventors: Pinfold, Brian E.; Nixon, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of arc welding under water or at superatmospheric pressure (or both) the weld is made in a chamber containing a gaseous atmosphere. The weld metal is deposited from flux-cored welding wire whose core contains strong deoxidant(s) such as aluminium magnesium, titanium, zirconium, lithium and calcium. A shielding, gas containing a selected proportion of oxygen or oxygencontaining gas but consisting mainly of an inert gas such as argon or helium is employed to surround the arc. The shielding gas may be constituted by the atmosphere in the chamber or alternatively it may be fed to the welding torch with the welding wire and issue from the torch in the form of an annular stream …
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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
- Granted November 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 27, 1996.
- 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.