Method and system for controlling the output of an engine driven welder
CA 2175777 C · Owner: Clark, Keith Leon · Inventors: Osowski, Denis Michael; Clark, Keith Leon; Schraff, Scott Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system of controlling the output current/voltage characteristic curve of an engine driven alternator welder with a maximum open circuit output voltage including a rotary engine, a three phase alternator rectifier, bridge having a number of electronic switching means for directing current to the output at an operating point determined by the firing angle of the switching means means, for sensing output current, means for sensing output voltage and a microprocessor output control device for controlling the firing angles of said switching means in response to the sensed current and sensed voltage. The method and system comprising: means for creating a desired fixed slope operating …
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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 May 3, 1996 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2018.
- 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.