Repair of turbine blades
CA 2044654 C · Owner: Legros, Raymond Donald · Inventors: Legros, Raymond Donald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in or relating to the repair of turbine blades" A method of repairing rotor blades on a turbine comprises the steps of removal of a rotor (12) from the turbine selecting a predetermined desired, position of the blades and after removing any inter blade ties (66,67) necessary to enable any required repair processes to be carried out aligning all the blades, (60,61,62,63) to said predetermined aligned position prior to the carrying out of any repair step which may incorporate cutting welding, machining etc. such, alignment considerably facilitates semi-automated repair of each blade (60,61,62,63) and has further benefits in facilitating reinsertion of inter blade ties (66,67) and …
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 June 14, 1991 and granted February 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2013.
- 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.