Speed changer with pre-determined gears, particularly for cycles
CA 2512877 C · Owner: Rolland, Norbert · Inventors: Rolland, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a speed changer (1) which is used to control derailleurs (5 6) by means of cables (3, 4) from a single rotating handle (2) said deraileurs (5, 6) being connected respectively to an elastic return means. The inventive speed changer (1) comprises at least two cable-manoeuvring mechanisms (7 8). According to the invention, the mechanism (8) for manoeuvring the cable (4) of the rear derailleur (6) which rotates integrally with the handle (2) can cause the rear cable (4) to loosen or tighten when the handle (2) is rotated in one direction. The speed changer is characterised in that the rotating assembly formed by at least one mechanism (8) for manoeuvring the rear cable …
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 January 14, 2004 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2026.
- 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.