Reciprocating piston engine with pumping and power cylinders
CA 2060203 C · Owner: Rotec Design Ltd · Inventors: Dullaway, Glen Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal combustion engine power unit comprises two power cylinders (3) 4) spaced equidistant about a pumping cylinder (5). All cylinders operate on two-stroke cycles the power cylinders (3, 4) , having a phase difference of 180°. Power piston asssemblies (13, 14) in the power cylinders (3 4) drive crankshaft (1). , Pumping piston (16) and separate crankshaft (2) are driven at twice the cyclic speed of the power pistons (13 14) and crankshaft (1) , through gear train (6 7) between the respective crankshafts, (1 2). Air inducted into pumping cylinder (5) via intake ports (20) is compressed and passed alternately to power cylinders (3 4), via valve controlled transfer passages (21 24). …
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 15, 1990 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2012.
- 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.