Gas turbine cooled blade tip shroud
CA 2264682 C · Owner: Ito, Eisaku · Inventors: Ito, Eisaku; Fukuno, Hiroki; Tomita, Yasuoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tip shroud for a moving blade, which is made thin and light to be used at a gas turbine downstream stage which is improved in the flow of cooling air to enhance the cooling efficiency. Cooling air holes 13 to 16 of a slot shape are formed in a tip shroud 11 of a moving blade 10 and are opened in two side faces to release the cooling air from the inside of the moving blade 10. In the upper face of the tip shroud 11, there are formed cooling air holes 20 which communicate with the higher pressure side in a combustion gas flow direction R to release the cooling air so that the cooling air flows from the higher pressure side to the lower pressure side to cool a high stress portion Y. A high …
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 June 18, 1998 and granted September 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.