Miab welding machine
CA 2047638 A1 · Owner: King, Clive G. · Inventors: Moore, Micheal J.; Kwan, Frank P.; Watts, Colin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for magnetically impelled arc butt welding (MIAB), particularly for welding pipes is described. The, welding head of the apparatus is disposed outside the pipe being welded. The apparatus has a pair of clamps which are operable so as to receive the pipes from above (i.e. the clamps open in an upward direction, so the pipes may be lowered into the apparatus). A MIAB welding method for welding pipes is also described. The method requires that the pipe movement be monitored during the forging step of the welding. By monitoring the pipe movement, the amount of pipe which is lost as "upset" during the welding operation may be calculated. - 1 -
Read the whole patent
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 July 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2013.
- 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.