Calibration method for transmission control clutches
CA 2212581 C · Owner: Detrick, George William Iii · Inventors: Gruver, Norval Thomas; Detrick, George William Iii; Eastman, Briton Todd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The hydraulically operated clutch elements of a powershift transmission have hold pressures and fast-fill times which are calibrated as a function of the rotation speed of an internal component of the transmission. The engine speed remains substantially constant and no or substantially no torque is transmitted to the output shaft of the transmission.
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 August 22, 1997 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2019.
- 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.