Dual-cylinder expander engine and combustion method with two expansion strokes per cycle
CA 2340196 A1 · Owner: United States Environmental Protection Agency · Inventors: Gray, Charles L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal combustion engine is provided with an expansion cylinder (10) and at least one combustion cylinder (20), preferably two or four combustion cylinders per expansion cylinder. An air-fuel mixture is ignited within the combustion cylinders to drive a combustion piston (13) which in turn, drives , an engine crankshaft (38). The gaseous products of combustion are exhausted at a pressure substantially above atmospheric to an expansion cylinder wherein they are allowed to further expand against an expander piston (28) to drive an expander crankshaft (40). Torque produced at the engine crankshaft and torque produced at the expander crankshaft are combined to drive vehicle wheels.
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 June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2021.
- 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.