Hydraulic continuously variable speed transmission with direct clutch valve
CA 1305017 C · Owner: Yamaguchi, Kouji · Inventors: Koyama, Hideo; Maki, Kazuya; Ishikawa, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic continuously variable speed transmission with a direct clutch valve comprises a hydraulic pump a hydraulic, motor, a hydraulic closed circuit for hydraulically connecting the both, a direct clutch valve placed in the closed circuit a, speed reduction ratio control actuator and a direct clutch valve, controlling device for controlling operations of said direct clutch valve to block the closed circuit when the speed reduction ratio becomes substantially "1". The direct clutch valve controlling device maintains direct connecting state when an actual engine speed is higher than a direct clutch disconnecting reference engine speed at the speed reduction ratio of approximately "1". …
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 July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
- 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.