Split-cycle four-stroke engine
CA 2678204 C · Owner: Southwest Research Institute · Inventors: Eubanks, Jeremy D.; Branyon, David P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An engine (100) has a crankshaft (108) rotating about a crankshaft axis (110) of the engine (100). An expansion piston (114) is slidably received within an expansion cylinder (104) and operatively connected to the crankshaft (108) such that the expansion piston (114) reciprocates through an expansion stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft (108). A compression piston (116) is slidably received within a compression cylinder (106) and operatively connected to the crankshaft (108) such that the compression piston (116) reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of …
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 14, 2004 and granted August 13, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2026.
- 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.