Passively cooled blade platform
CA 2503151 C · Owner: Pratt & Whitney Canada Corp. · Inventors: Chevrefils, Andre; Pham, Que Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A passively cooled blade platform (16) for a gas turbine rotor adapted for rotation about an axis within a stationary coolant fluid. The platform (16) has a radially outer surface defining an annular gas path a radially inner , surface in flow communication with the coolant fluid a leading edge (17), and , a trailing edge (18) with at least one cooling flow channel (23 24, 25) in , the inner surface. Each channel has a flow path from a channel inlet (26 27, 28) to a channel outlet (29, 30, 31) with a tangential component at the inlet (26, 27, 28) opposite to the direction of rotation and an axial component at the outlet (29, 30, 31). The flow channels are defined by ribs (19 20) or , …
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 October 15, 2003 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2025.
- 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.