Gas turbine cooled blade turbulators
CA 2253741 C · Owner: Suenaga, Kiyoshi · Inventors: Suenaga, Kiyoshi; Fukuno, Hiroki; Aoki, Sunao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Leading edge portion turbulators in gas turbine cooled blade are improved so as to enhance cooling performance. Rounded tip portion of leading edge portion cooling passage 3 is approximated by triangular cooling passage 1 having orthogonal turbulators 11 12 and smoothly, curved rear portion thereof of the leading edge portion cooling passage 3 is approximated by square cooling passage 2 having oblique turbulators 13, 14, thus the leading edge portion cooling passage 3 is formed so as to have combination of orthogonal turbulators 21 of the rounded tip portion and oblique turbulators 22, 23 of the smoothly curved rear portion thereof. These rounded portion and rear portion thereof are …
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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 March 31, 1998 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 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.