Air-cooled engine
CA 2690211 C · Owner: Ogawa, Kazuhisa · Inventors: Shinoda, Akihisa; Ogawa, Kazuhisa; Sato, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air-cooled engine is cooled by cooling air. The air-cooled engine includes a cylinder block and a cylinder head. The cylinder block has cylinder cooling through-ducts capable of transmitting cooling air on the periphery of a cylinder. The cylinder head has a head-cooling through-duct capable of transmitting cooling air. The cylinder-cooling duct extend in a direction perpendicular to the axial line of the cylinder and are communicated with each other by means of communication channels.
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 16, 2006 and granted September 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.