Windtrap for power development
CA 2046752 A1 · Owner: Whelan, Matthew P. · Inventors: Whelan, Matthew P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The several methods used to develop windpower have the disadvantage of losing most of the wind's force in their operation, example where vanes are used slippage is a big problem and in the vertical mast type of machines such as the "Darrieus" and "Savonius" a lot of power is lost by resistance on the return side of the mast. This invention the "Windtrap", holds all the wind within the dimensional area of each unit when on the drive or power side and is so designed that it closes and comes edge on to the wind on the return side of the mast giving minimum resistance.
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 10, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 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.