Automatic transmission with add on overdrive
CA 1281559 C · Owner: Woodcock, Stewart J. · Inventors: Eastman, Richard E.; Woodcock, Stewart J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An add-on overdrive unit for location on an extended output shaft of an automatic transmission. The unit includes a planetary gear set connected by means of its annulus gear to an outer race of a one-way clutch. The oneway clutch inner race is concentrically interconnected to the transmission output shaft. An hydraulic piston operates a first direct-drive clutch pack and a second overdrive clutch pack. The piston is normally biased to its non-pressurized failsafe direct drive position by a compression coil spring. As a result the direct drive clutch pack is engaged causing the planetary sun gear to be locked to the annulus gear providing a one-to-one direct drive speed ratio to the …
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
- Granted March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.