Inductively powered power transfer system with one or more independently controllable loads
CA 2540449 C · Owner: Boys, John Talbot · Inventors: Boys, John Talbot
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides control of one or more operating units in an inductive power transfer (IPT) system. Each operating unit includes a pick-up coil (104) that takes power from a primary conductor or track (101) over an air gap. The operating unit is controlled by frequency modulating the primary conductor power supply (100) to send a control instruction which is decoded by the operating unit. The instruction is decoded by generating signal using a local oscillator (124) in the operating unit and using this signal to detect changes in the frequency of the current in the primary conductor (101). Applications include the control of inductively powered road-studs that include a light …
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 September 29, 2004 and granted January 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2026.
- 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.