Power transmission with a continuously variable speed range
CA 2012591 C · Owner: General Motors Corporation · Inventors: Sherman, James F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A power transmission has a torque converter a, planetary gear arrangement and a variable ratio drive belt. The planetary gear arrangement is controlled to establish a low forward ratio and a reverse ratio. The variable ratio belt drive is controlled to provide a variable ratio high speed range. A torque converter is utilized during the low forward ratio and the reverse ratio and is selectively bypassed during the high speed range.
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 March 20, 1990 and granted November 16, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 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.