Airfoil blade and method for its manufacture
CA 2388292 A1 · Owner: Neely, Michael Joseph · Inventors: Neely, Michael Joseph; Gerken, Mark Allen; Meats, James L. E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This centrifugal blower fan wheel has extruded-aluminum airfoil blades. The preferred blades have two hollow regions separated by an angled mid-load support beam inside the blade. The nose section of the blade (at the leading edge) and the tail section of the blade (at the trailing edge) have open semicircular grooves which face the adjacent hollow sections and are designed to accept thread cutting or thread forming screws for attachment of the blade to a ring-shroud and back-plate.
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 May 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2024.
- 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.