Gas turbine cooled blade
CA 2266140 C · Owner: Ishiguro, Tatsuo · Inventors: Masada, Junichiro; Tomita, Yasuoki; Ishiguro, Tatsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gas turbine cooled blade is constructed without increase in number of parts and man-hour wherein seal air is maintained to lower temperature with heat exchange rate being suppressed and heat transfer rate of cooling medium in cooling passage is enhanced. Of plurality of cooling passages (A B, C, D, E) provided in blade, first row cooling passage (A) is covered at blade inner and outer peripheries and communicates with second row cooling passage (B) via communication hole (6) and with main flow gas path via film cooling hole (7). Second row cooling passage (B) commu- nicates with blade inner peripheral cavity (10) to form seal air supgly passage. Plurality of ribs (31) are disposed on inner …
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 March 19, 1999 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2021.
- 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.