Hydraulic control system for continuously variable transmission
CA 1252021 A · Owner: Borg-Warner Automotive, Inc. · Inventors: Haley, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HYDRAULIC CONTROL SYSTEM FOR CONTINUOUSLY VARIABLE TRANSMISSION, ABSTRACT:, A control arrangement for a continuously variable transmission (25) includes an electronic control system (50) and a hydraulic control system (51). In the hydraulic control system three separate electromechanical control assemblies (80,81,82) are used to regulate the pressure in the secondary sheave chamber (to hold the belt tension), the fluid flow to and from the primary sheave chamber (to regulate the CVT ratio) and, to control the pressure in the apply line for the clutch chamber. The pump assembly (72) of the hydraulic control system has a first output connection (73) for providing fluid at line (high) pressure …
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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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.