Rotary forging apparatus
CA 2135340 A1 · Owner: Rays Engineering Co. Ltd. · 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 has a first rotary ram a second rotary ram facing together in a vertical direction and a shaping roller equipped beside the rams. The apparatus forges a product from a material work by sandwiching the work (10) between the first ram and the second ram pressing the work by the rams, thinning the work into the disc part of a product, pressing the excluded material out of the rams by the shaping roller to the sides of the rams and shaping the rim part. When the apparatus forges a wheel having a V-grooved or U-grooved rim part scars or voids are often generated on the rim part, since the roller does not move in the vertical direction in prior apparatuses. This …
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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 November 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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.