Current limiting circuit
CA 2265636 C · Owner: Wainio, Ronald Arvid · Inventors: Wainio, Ronald Arvid; Moran, Richard Jerome; Schreiber, Daniel James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electronic circuit (125), and corresponding method for controlling the , closing velocity of electrical switchgear (120) includes an actuator (120) , and a current detection circuit (125) that detects whether an optimum amount of current is flowing through the actuator. When the optimum amount of current is detected, a current optimizing resistor (135) is inserted into the path of the current flowing through actuator, thus limiting the current flowing through the actuator to the optimum amount. This in turn, limits the closing , velocity of the electrical switchgear and minimizes contact bounce.
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 September 10, 1997 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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.