Phase barrier for use in a multiphase circuit breaker
CA 2288835 A1 · Owner: Niccolls, Richard W. · Inventors: Broghammer, William J.; Ophaug, Darrell P.; Niccolls, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for interrupting the flow of electrical current in a multiphase circuit path between at least one source and at least one load including a circuit breaker having an electromechanical assembly and a blade carrier corresponding to each phase of the multiphase circuit path and a phase barrier between each blade carrier. The blade carriers are interconnected preferably, with a crossbar wherein, when one or more phases of the circuit path are interrupted, opening one or more of the blade carriers the crossbar , moves all of the blade carriers to open positions. The phase barrier is positioned circumferentially around the crossbar between each blade carrier and …
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 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2021.
- 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.