Composite blade root attachment
CA 2317840 C · Owner: General Electric Company · Inventors: Mesing, Thomas Carl; Ravenhall, John Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A preferred embodiment of said present invention is a gas turbine engine blade root shim (40) for use between a composite blade root (18) and a wall of a slot for receiving the root in a rotor (12) of the engine. An exemplary, embodiment of the shim (40) includes a longitudinally extending base (6o) having distal first and second transversely spaced apart ends (64 68), first, and second longitudinally extending legs (70 72) acutely angled inwardly, towards the base (6o) from the first and second ends (64 68), and first and, second low coefficient of friction coatings (78 8o) on first and second, outwardly facing surfaces (84 86) of the first and second legs (7o, 72) respectively. Among …
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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 September 7, 2000 and granted February 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2022.
- 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.