Two stage rotary vaned internal combustion engine
CA 2105196 A1 · Owner: Roberts, Donald Mclean · Inventors: Roberts, Donald Mclean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two stage rotary vaned internal combustion engine using cylindrical rotors that spin inside a pair of specially shaped chambers with extendable vanes that seal the space between the spinning rotor and the stationary chamber each rotor and chamber form a plurality of compression spaces connected by valves to combustion/expansion chambers the intake flow runs along the axis of the rotors and is partially pressurized before being directed into the compression chamber where further compression takes place and compressed air is then directed through the valve body into the combustion chamber where ignition and expansion take place causing the rotor to rotate exhaust takes place simultaneously …
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 August 31, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 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.