Rotary forging apparatus
CA 2134607 C · Owner: Inatani, Shujiro · Inventors: Inatani, Shujiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary forging apparatus is provided herein for making a product from a workpiece of plastic metal material. The product which is formed has a disc part and a rim part. The disc part has a first disc surface and a second disc surface. The rim part has an outer surface a first inner surface that communicates with the first disc surface and a second inner surface that communicates with the second disc surface. The apparatus includes a first rotary ram which is rotatable around a common axis and which has a first disc-pressing surface and a first rim-shaping surface. The first disc-pressing surface conforms to the first disc surface of the product. The first rim- shaping part conforms to the …
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 28, 1994 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2016.
- 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.