Improvements to the device to control the play in a gas turbine
CA 2491666 C · Owner: Snecma Moteurs · Inventors: Roussin-Moynier, Delphine; Fachat, Thierry; Gendraud, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A clearance control device (22) for controlling clearance between rotary blade (4) tips (4a) and a stationary bushing of a gas turbine (2) having a casing (14) that is provided with at least two annular ridges (18 20), the clearance control device including a circular tuning unit (26) that includes air circulation means for circulating air said means being made up of at least three ducts (28 30, 32); air supply means for supplying air to the air flow ducts; and air discharge means for discharging air on the ridges (18 20) in order to modify the temperature the air discharge means for each duct being made up of at least one top row having a number N of perforations (34) disposed facing one …
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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 December 30, 2004 and granted June 26, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.