Method and apparatus for controlling combustion using an oxygen sensor
CA 2205774 C · Owner: Nishiyama, Tomohiko · Inventors: Mitani, Kazuhisa; Fukuta, Yukio; Nishiyama, Tomohiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combustion control method includes the steps of providing an oxygen sensor within a furnace or at a flue of the furnace detecting an oxygen, concentration of exhaust gas and controlling an air ratio. A regenerative combustion apparatus includes a regenerative combustion burner an oxygen, sensor disposed in an air supply and gas exhaust passage of the burner. A combustion control method and apparatus includes the steps of switching an electrical voltage imposed on an oxygen sensor between a first electrical voltage and a second electrical voltage near O V conducting an air ratio control when the imposed voltage is at the first voltage and monitoring unburnt components included in exhaust …
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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 22, 1997 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.