Derailleur bicycle; retractable chain strain mechanical sensor to control an electric booster
CA 2310974 C · Owner: Routier, Thierry · Inventors: Routier, Thierry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One of the major barriers to the daily use of a bicycle for work/home commuting, purposes has always been steep climbs. An innovative chain strain sensing device, that controls an interface to allow installation of a wide selection of existing, cordless power tools into a derailleur bicycle power train is proposed here. The, chain tension applied by the rider is sensed by a mechanical device that has the, capability of following all chain lateral positions that are imposed by the rear (or, front) derailleur shifter. The tension signal is then directly sent to the power tool, trigger through a control cable. The result is that the power tool motor is activated, only when extra power …
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 June 21, 2000 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2022.
- 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.