Hollow rotor blade for the turbine of a gas turbine engine
CA 2478746 C · Owner: Judet, Maurice · Inventors: Boury, Jacques; Judet, Maurice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a hollow blade comprising an internal cooling passage (24) an open cavity (30) located at the tip (14) of the blade and bounded by an end wall (26) and a rim (28) and cooling channels (32) that connect the said internal cooling passage (24) to the outer face of the pressure wall (16) the said cooling channels (32) being inclined to the pressure wall (16) in such a way that they emerge on the outer face of the pressure wall (16) near the top (28a) of the said rim. By way of feature a reinforcement of material (34) is present between the rim (28) and the end wall (26) of the cavity (30) along at least one portion of the pressure wall (16) whereby the said rim (28) is …
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 August 2, 2004 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2026.
- 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.