Hydrostatic transmission control
CA 1063910 A · Owner: Renold Limited · Inventors: Foster, Kenneth W.S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To provide a closed loop hydrostatic transmission of pump and motor with a true acceleration control for the motor drive shaft, as opposed to a velocity control which may be achieved by varying the relative volume displacement of the pump and motor the, maximum delivery pressure of the pump is set by an accelerator and the relative volume of the pump and the motor is varied automatically by control means to maintain the pump delivery pressure at the maximum determined by the setting of the accelerator. Thus the closed loop system maintains a substantially constant maximum pressure throughout the flow range of the transmission for each accelerator setting and since the output torque of the …
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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 October 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 1996.
- 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.