Pressure proving gas valve
CA 2401618 A1 · Owner: Honeywell International Inc. · Inventors: Bohan, John E. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure proving gas valve (10) insures safe and efficient operation of a fuel-burning appliance by monitoring combustion airflow and appropriately controlling the valve based (22) upon this airflow. An airflow sensor (26) is incorporated into a pressure proving valve housing (20) itself thus providing integrated solution for the control of the combustion process. Consequently when heat is called for, no fuel is provided to the combustion chamber (12) unless appropriate combustion air is sensed. Further by monitoring the actual , airflow, additional control capability is provided. That is a variable speed , blower (60) associated with the combustion apparatus can be controlled to …
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 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2023.
- 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.