Steam cooled gas turbine rotor
CA 2247491 C · Owner: Mitsubishi Heavy Industries, Ltd. · Inventors: Tomita, Yasuoki; Ichiryu, Taku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas turbine having rotor blades cooled with steam. A cooling steam circulation passage for a gas turbine rotor (30) having turbine discs (41, ~ 47) are composed of center line bores (73 ~ 77) open at an axial end of the rotor and, extending through a central portion of the rotor; a steam inlet-outlet pipe (79) coaxially, disposed therein so as to define an annular passage (81) for cooling steam at an outer, side; steam cavities (89a, 89b) defined between and by facing side surfaces of said, turbine discs; steam cavities (91a 91b) each defined at non-facing side , surface portions of said turbine discs (41, 43); axial steam holes (61 63) formed to extend , through the, turbine discs …
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 January 22, 1998 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 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.