Driven body displacement sensor comprising brushless motor
CA 2291626 A1 · Owner: Nippon Thermostat Co. Ltd. · Inventors: Sano, Mitsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A driven body displacement sensor comprising a brushless motor capable of , simplifying the structure of a flow control valve for controlling the flow rate of, for example, cooling water driven by a brushless motor and of being , miniaturized and reduced in cost. The opening of a flow control valve (11) for controlling the flow rate of cooling water fed to the radiator side is controlled by a brushless motor (11). A rectifying switch signal for driving the brushless motor (11) is received by a phase sequence detecting circuit (22a) to control an up-down counter (22b). A calculating circuit (22c) calculates the count of the counter (22b) and hence the opening of the flow control valve …
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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 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2021.
- 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.