Gas turbine blade
CA 2280751 C · Owner: Ito, Eisaku · Inventors: Aoki, Sunao; Ito, Eisaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the present invention is to provide a blade for a combined cycle gas turbine that can be effectively cooled with a proper amount of steam. The blade for the gas turbine according to the present invention includes an internally formed coolant steam passage (a) for cooling the blade with coolant steam flowing through the coolant steam passage (a), and is characterized in that this ratio (t/c) of blade thickness (t) of the gas turbine blade to chord length (c) thereof is not greater than 0.15. Assuming that the flow rate of the coolant steam flowing through the coolant steam passage (a) is constant the flow speed of, the coolant steam increases as the ratio (t/c) becomes smaller. …
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 7, 1998 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2020.
- 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.