Hydraulic pressure control apparatus having device for estimating amount of fluid in reservoir to which the fluid is discharged to reduce cylinder pressure
CA 2173527 C · Owner: Aizawa, Hideyuki · Inventors: Uchida, Kiyoyuki; Aizawa, Hideyuki; Soga, Masayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle brake cylinder pressure control apparatus wherein an amount of fluid flow into a reservoir is estimated based on vehicle deceleration and a pressure reducing time of the brake cylinder, while an amount of fluid flow from the reservoir is estimated based on a pumping time during which the fluid is pumped up from the reservoir by a pump and the, vehicle deceleration or an operating speed of a pump motor so that an amount of the fluid stored in the reservoir is estimated on the basis of the amount of fluid flow into and from the reservoir. Various parameters may be used in place of the vehicle deceleration, pumping time and motor operating speed, for estimating the amounts of the …
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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 4, 1996 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.