Quick-action circuit breaker
CA 2076675 C · Owner: Blochouse, Roland · Inventors: Blochouse, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hyper-rapid circuit breaker is described which is assisted by a semiconductor control circuit comprising a repulsion coil, a repulsion disk (37) associated with a contact bridge (39) carrying the movable contacts (41), said repulsion disk (37) collaborating with said repulsion coil (35) a means for, retaining the contacts in the closed state acting on a tail piece integrally connected to the repulsion disk (37), and a damping means (97) which comprises a plunger rod (95) integrally connected to the repulsion disk (37) and a reservoir (99) containing fluid intended to absorb the kinetic energy of the repulsion disk (37)/tail piece (43)/plunger rod (95) assembly upon repulsion by the …
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 February 18, 1991 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2013.
- 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.