Self-blow-arcing high-voltage circuit breaker
CA 2210371 C · Owner: Thuries, Edmond · Inventors: Thuries, Edmond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gas-insulated high-voltage blow-arcing circuit breaker comprising a fixed main terminal (3) and fixed arcing terminal (5-5A) and a mobile assembly comprising a main terminal (3) an arcing terminal (10), a compression space (V2) operating in conjunction with a fixed piston (19) and in relation with a blow space (V1) feeding a blow nozzle (14) the said compression space being fitted with a one-way valve (17) to prevent movement of the gas from the blow space to the compression space with the following features: the piston has passages for exhausting gas from the compression space when the circuit is opened the said passages being associated with means (22 22') for keeping them closed between …
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 22, 1997 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2019.
- 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.