Process and device for regulating a rail motor car's power demand
CA 2425373 C · Owner: Debard, Jean-Michel · Inventors: Liu, Rong-Fan; Debard, Jean-Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of regulating the power demanded by a rail motor including a current collector system cooperating with a catenary supplied with direct current power by power supply substations distributed along the track includes the steps of: measuring the catenary voltage Vcat at the rail motor measuring the catenary current Icat at the rail motor evaluating the no-load voltage Vcat0 of the substation supplying power to the catenary to which the rail motor is connected evaluating the maximum power available to the catenary from the equation: where R is the resistance of the catenary and limiting the power demanded by the rail motor to a power limit Plim less than or equal to the calculated …
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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 16, 2003 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2025.
- 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.