Revolution controller for a continously variable transmission
CA 2004188 C · Owner: Yamashita, Yoshinori · Inventors: Tatsumi, Takumi; Yamamoto, Hiroaki; Yamashita, Yoshinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuously variable transmission includes a driving side pulley and a driven side pulley each having a fixed pulley part and having a movable pulley part supported for movement toward and away from the fixed pulley part, the width of a groove between the pulley parts of each pulley being increased and decreased to increase and decrease at each pulley the rotating radius of a belt wound around both of the pulleys to change a belt ratio. A revolution controller for the transmission limits the rate of change of a target number of revolutions for an engine driving the transmission to a rate limit lower than a prescribed rate when the target number of revolutions of the engine specified by a …
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 November 29, 1989 and granted March 29, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2011.
- 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.