Multi-speed free-wheel ring for bicycles
CA 1284591 C · Owner: Marnat, Michel · Inventors: Marnat, Michel; Jourdain, Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multi-speed free-wheel sprocket support ring possessing two ball races for rows of balls for connecting the ring to an interior starwheel and a ratchet toothing intended to interact with spring clicks supported by the starwheel, characterized in that it is formed by at least one thin-walled tubular member and in that the ball races and the toothing are formed by deformations of the wall of the member.
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
- Granted June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2008.
- 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.