Internal combustion engine
CA 2047516 C · Owner: Merritt, Dan · Inventors: Merritt, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal combustion engine has first and second cylinders the first , cylinder having a, larger swept volume than the second cylinder and the second cylinder being formed in the, crown of the first cylinder. First and second pistons are reciprocable respectively in the first, and second cylinders the second piston being formed as a protrusion on the crown of the first, piston. The first cylinder has an air inlet and an exhaust outlet whilst a first fuel source, provides fuel to the second cylinder. The second piston has a crown which is spaced from, and connected to the crown of the first piston and which has an edge which is relatively thin, in the axial direction compared to the …
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 July 22, 1991 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2013.
- 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.