Combined bleed valve and annular diffuser for gas turbine inter compressor duct
CA 2199875 C · Owner: National Research Council Of Canada · Inventors: Carscallen, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-spool gas turbine engine of the type having an annular inter compressor duct connecting a low pressure compressor to a further compressor stage, and having improved bleed means for bleeding off a variable amount of air from the duct when the engine is being operated at partial load. The bleed means comprises opening means arranged circumferentially around the outer wall of the duct and pivotally mounted, air deflectors for deflecting air flowing in the duct outwardly through the openings in the outer wall of the duct. In accordance with the invention the, air deflectors are flaps forming a circumferential array and sealing elements, are provided movable with the flaps and …
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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 October 5, 1995 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2017.
- 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.