Control device for vehicle automatic transmission
CA 2299804 C · Owner: Nakajima, Kenji · Inventors: Fujioka, Masato; Takahashi, Tooru; Nakajima, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle automatic transmission selectively establishes a plurality of shift ranges through a simultaneous engagement of the two hydraulic coupling elements C1 C2 of the first group, and a simultaneous engagement of either one of the two hydraulic coupling elements of the first group and any one of the two or more hydraulic coupling elements C3, B1 B2 of the second group. A fail-safe valve 9 is interposed between an oil passage L3 communicating with the shift control valves 61 64, 65 other than, the shift control valves 62 63 corresponding to the hydraulic, coupling elements C2 C3 that are being intended to establish a predetermined single shift range and an oil supply passage L2. 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 March 1, 2000 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2022.
- 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.