Transmission
CA 2020582 C · Owner: Tseng, Sheng-Tsai · Inventors: Tseng, Sheng-Tsai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission applying totally meshing gear sets to transmit power, wherein a sleeve is used to loosen or twist spring inside the gear set so as to select the required gear, set to transmit power and several sequential sets of, driving transmission ratio are provided whereby when shifting, the accelerator does not need to be freed and can be continuously stepped down, and a microprocessor will according to data sent from detecting devices detecting rotation speed of input shaft properly control shifting operation so that automatically shifting operation can be quickly actually sensively performed, permitting the engine to output power at maximum efficiency. (Fig. 1) 47
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 July 6, 1990 and granted April 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2012.
- 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.