An electrically controlled solenoid valve driver with compensation for coil resistance changes
CA 2221667 A1 · Owner: Saposnik, Fabio J. · Inventors: Saposnik, Fabio J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To precisely control an electrically controlled solenoid valve the resistance, of the solenoid coil is measured either indirectly through measuring the temperature of the coil or directly by placing a known resistance in series with the solenoid or applying a known current source to the solenoid. Based on the measured coil resistance the voltage, applied to the coil is adjusted so that a desired current through the coil is achieved.
Read the whole patent
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 November 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2019.
- 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.