Friction welding method for joining a rim and a disc of a disc wheel and the apparatus therefor
CA 2043975 C · Owner: A & S Corporation · Inventors: Amao, Tsutomu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This is a friction welding method for joining a rim and a disc of a disc wheel and apparatus therefore wherein an outside material or a rim and an inside material or a disc each of which is a component of a disc wheel are joined, together. This friction welding apparatus comprises typically, a, mechanism for fixing firmly the circumference of one material almost entirely circumferentially, a mechanism for rotating another material, a mechanism for generating frictional heat between the two materials, with the inside material fitted into the outside material, by pressurizing the rotated material to the fixed material. This method employs a lap joint process instead of a butt joint process. …
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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 June 6, 1991 and granted July 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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
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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.