Superconductive magnetically levitated railway, and power-feed system therefor
CA 2072316 C · Owner: Railway Technical Research Institute · Inventors: Fujie, Junji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A superconductive magnetically levitated railway is provided with six phases of propulsion-levitationguidance ground coils arranged on both side walls of a track, and with a pair of superconducting magnets which, are mounted on the vehicle, corresponding to the six phases of the ground coils. The ground coils are a Uphase coil, a negative W-phase coil, a V-phase coil a, negative U-phase coil, a W-phase coil and a negative Vphase coil arranged successively at a 60° pitch along both side walls of the track. As a result higher, harmonics of the magnetic field produced by the propulsion-levitation-guidance ground coils can be reduced. In addition, the number of layers of the ground coils can be …
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 June 25, 1992 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2014.
- 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.