Spring powered electrical switching apparatus with anti-rollover cam
CA 2396302 A1 · Owner: Rakus, Paul Richard · Inventors: Rakus, Paul Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spring biased anti-rollover cam extends the drop-off point on the drive cams of the spring powered operating mechanism of a power circuit breaker, to preclude premature tripping in response to high short circuit currents. The anti-, rollover cam retracts to facilitate normal reset of the latch mechanism when the, spring of the operating mechanism is recharged for the next closing of the breaker.
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 July 31, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 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.