Emissions control system for small internal combustion engines
CA 2547291 A1 · Owner: Tecumseh Products Company · Inventors: Brower, David R.; Stenz, Dennis N.; Rado, Gordon E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An evaporative emissions control system for small internal combustion engines includes a control valve associated with a fuel line and with a vent line which each connect, the fuel tank to the carburetor. When the engine is not running the control , valve, automatically closes the vent line and the fuel line thereby trapping fuel , vapors within the fuel tank and vent line and preventing the supply of liquid fuel to the carburetor. Upon, engine start up, actuation of a bail assembly or vacuum produced within the carburetor, causes the control valve to open the vent line and the fuel line venting fuel , vapors from the, fuel tank through the fuel line to the carburetor for consumption by …
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, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2025.
- 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.