Expandable mandrel for use in friction stir welding
CA 2582732 C · Owner: Sii Megadiamond, Inc. · Inventors: Steel, Russell J.; Packer, Scott M.; Russell, Monte
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mandrel (72) that provides a counter-force to the pressure exerted on the outside of a pipe (90) or other arcuate surface by a friction stir welding tool, wherein the mandrel (72) is expandable through the use of a wedge (82) and wherein the mandrel (72) enables multiple friction stir welding heads to simultaneously perform welding on the arcuate surface.
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 October 5, 2005 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.