Electro-hydraulic control system for a dual-pass continuously variable transmission
CA 2030104 A1 · Owner: Anderson, Scott R. · Inventors: Smirl, Richard L.; Algrain, Marcelo C.; Anderson, Scott R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system for controlling hydraulic pressure in a dual pass continuously variable transmission includes a pump to provide primary and secondary hydraulic pressures for regulating the pulley ratio and belt tension. A minicomputer regulates the primary and secondary pressures, and a transition mechanism alternates the paths of the primary and secondary pressures between first and second pulleys of the transmission o that the primary pressure is fed to the drive pulley and the secondary pressure is fed to the driven pulley.
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 15, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 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.