Counterrotating turbofan engine
CA 2548133 C · Owner: Lee, Ching-Pang · Inventors: Beacock, Robert John; Cherry, David Glenn; Lee, Ching-Pang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A turbofan engine (10) includes a fan (14) compressor (18), combustor (20), high pressure turbine (22) and low pressure turbine (24) joined in serial flow communication. The high pressure turbine (22) includes two stages of rotor blades (46) to effect corresponding exit swirl in the combustion gases discharged therefrom. A transition duct (50) includes fairings extending between platforms (54,56) for channeling the combustion gases to the low pressure turbine (24) with corresponding swirl. First stage rotor blades (66) in the low pressure turbine (24) are oriented oppositely to the rotor blades (46) in the high pressure turbine (22) for counterrotation.
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 May 25, 2006 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 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.