Combination chainless driving device of bicycle
CA 2094202 A1 · Owner: Pisal Poorungrit · Inventors: Leu, Jiunn-Horng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combination chainless driving device of a bicycle comprises a five-way seat housing a crank axle and having a connecting portion and a front connecting mount fastened to an end of a fork connecting mount fastened to an end of a fork tube and provided with a front auxiliary gear mounted thereinto. The front auxiliary gear meshes with a main gear fastened to the crank axle. Fastened to another end of the fork tube is a rear connecting mount provided with a rear main gear mount thereinto. The rear connecting mount is fastened to a gear box in a manner that the rear main gear engages a rear auxiliary gear inside the gear box. The rear auxiliary gear has a shaft portion provided with an axial …
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 April 16, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2015.
- 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.