Vertical axle wind turbine
CA 2433951 A1 · Owner: Pezeshk Zad, Parviz · Inventors: Pezeshk Zad, Parviz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is known that wind is an abundant and environmentally safe source of energy. In this invention two or more wings are installed on a vertical axle. Each wing is, equipped with flappers that open when wind blows on one side and close when wind blows on the opposite side of the wing thus windward wings that are closed, are pushed back by wind pressure causing the axle to rotate converting wind, energy to rotational energy of the vertical axle.
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 July 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.