Chainless transmission mechanism for bicycles
CA 2371957 A1 · Owner: Ruan, Weihua · Inventors: Huang, Yongqiang; Xiao, Ronghua; Zhang, Jinhong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is to provide a chainless transmission mechanism comprising a first, shaft connected to a pedal of the bicycle; a first bevel gear connected to the first shaft;, a second shaft perpendicular to the first shaft two ends of which are , connected to a second bevel gear and a third bevel gear respectively, the second bevel gear , being matched with the first bevel gear to drive the second shaft; a fourth bevel gear, mounted on an axle of a rear-wheel hub of the bicycle to engage with the third bevel, gear; a ratchet clutch connected between the rear-wheel hub and the axle; and a, connection member connected between the fourth bevel gear and the rear-wheel hub. A bicycle with …
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 February 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2024.
- 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.