Continuously variable hydrostatic transmission including 1:1 ratio lock-up clutch
CA 2288729 A1 · Owner: Tucker, Clive · Inventors: Folsom, Lawrence Ray; Tucker, Clive
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a continuously variable hydrostatic transmission including a hydraulic pump unit (18) driven by an input shaft (14) a grounded hydraulic motor unit (20), and an intermediate wedge-shaped swashplate (22) for developing torque on an output shaft (16) in response to pumped exchanges of hydraulic fluid between the pump and motor units (18, 20) through swashplate ports a ratio controller , is provided to vary transmission ratio by changing the swashplate angular orientation and to engage a lock-up clutch (26) directly mechanically coupling the input shaft (14) to the output shaft (16) when a 1:1 transmission ratio is set.
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 April 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2020.
- 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.