Only picked up phases recloser control
CA 2376906 C · Owner: Hart, David · Inventors: Mcclure, Graeme N.; Hart, David; Laplace, Carl J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recloser trips on one phase for single-phase only fault conditions two phases for two-phase fault conditions or all three phases for three-phase fault conditions. During power delivery the recloser monitors the three phases of a power line (e.g. phases A B, and C). If a fault is detected on one phase then a timer is started and subsequently decremented. If the timer finishes counting down while the fault is still present then it is determined if any of the other two phases are timing a fault. If so then those phases having a fault are tripped. Thus only the faulted phase(s) is (are) tripped.
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 March 15, 2002 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2024.
- 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.