Method of measuring operation characteristic of proportional electromagnetic control valve, method of controlling operation of hydraulic cylinder, and method of modifying operation characteristic of proportional electromagnetic control valve
CA 2228554 C · Owner: Kubota, Koji · Inventors: Miyagawa, Satoshi; Ikarashi, Masaaki; Kubota, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method by which an operation characteristic of a proportional electromagnetic control valve can be automatically measured in a short period of time. For this purpose in the, operation characteristic measuring method of the present invention, when the proportional electromagnetic control valve to be measured is a proportional electromagnetic pressure control valve, at each step for measuring a pressure of a hydraulic circuit, the pressure is measured with a predetermined interval of time, the pressure is assumed to be stabilized at a point of time when a difference ~P between thus measured pressure value and the previously measured pressure value becomes a …
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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 February 6, 1998 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.