Continuously variable hydrostatic transmission ratio controller capable of generating amplified stroking forces
CA 2287183 A1 · Owner: General Dynamics Land Systems, Inc. · Inventors: Larkin, Robert Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To control transmission ratio of a continuously variable hydrostatic transmission including an input shaft (14) an output shaft (16), a hydraulic , pump unit (18) driven by the input shaft (14) a grounded hydraulic motor unit , (20) and a wedge-shaped swashplate (22) drivingly pivotally connected to the , output shaft (16) and positioned to accommodate pumped hydraulic fluid exchanges between the pump and motor units (18 20). A ratio controller is , provided having a pair of hydraulically actuated differentially sized pistons , (58, 68) coupled by a linkage mechanism to pivot the swashplate (22) in opposite transmission ratio-changing directions. The smaller piston (58) is incorporated …
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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
- 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
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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.