Precision electro-hydraulic actuator positioning system
CA 2398559 A1 · Owner: Bosch Rexroth Corporation · Inventors: Spadafora, William Glenn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electro-hydraulic actuator system (10 or 140) includes a hydraulic actuator (27) having a pair of fluid filled chambers (29 30) and being operable to , provide an actuator output (12) as a function of fluid pressures at the chambers. An electric-hydrostatic actuator (34 or 141) includes an electric motor (35 or 142) responsive to motor control signals for providing an output to a motor shaft (40 or 150), one or more pistons (56 or 166 170) coupled to , the shaft, and one or more hydraulic housings (92 or 160 162) mounted on the , motor and cooperating with the pistons for providing a pair of fluid cylinders (54 or 164, 168) respectively coupled to the fluid chambers at the hydraulic …
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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 January 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2023.
- 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.