Gas turbine cooled moving blade
CA 2257162 C · Owner: Mitsubishi Hitachi Power Systems, Ltd. · Inventors: Tomita, Yasuoki; Fukuno, Hiroki; Suenaga, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gas turbine cooling moving blades, wherein a cooling air supply path is shortened to prevent possible temperature rise of a cooling air and suppress pressure drop until the cooling air reaches the blades. Cooling air passages (16) are formed in a casing wall below first stage stationary blades (11) with one end (16a) thereof opened toward a casing and the other end (16b) thereof opened toward a space (13). The cooling air passages (16) are oriented to permit the cooling air to jet toward air flowing holes (6) provided in shank portions (4) below platforms (2) of moving blades (1) flow into the shank , portions (4) from the air flowing holes (6) and enter the moving blades (1). Since …
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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 April 17, 1998 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.