Fuel delivery system for fuel-burning heater and associated components
CA 2109448 C · Owner: Gansel, Christopher L. · Inventors: Briggs, Eugene C.; Robertson, Wayne; Gansel, Christopher L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil-burning furnace including a combustion zone and a nozzle block assembly through which oil and pressurized air are introduced into the combustion zone utilizes an oil pump of trochoidal design for delivering oil to the combustion zone at a metered rate and a purge control for withdrawing oil from the nozzle block assembly upon shut down of the furnace operation. The flow rate at which the oil pump delivers the oil to the nozzle block assembly is relatively constant regardless of the weight or viscosity of the oil burned by the furnace and the purge control, cooperates with an air compressor used for delivering air under, pressure, to the nozzle block assembly and includes an …
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 October 28, 1993 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2015.
- 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.