Guide-case for water turbine
CA 2577070 C · Owner: Demontmorency, David George · Inventors: Demontmorency, David George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Guide case (24) for use in conjunction with a water turbine (20) with a , helical top wall (35) of the annular chamber (27) extended downstream of the inner wall (39) of the inlet port (30). The extension is wetted on its downstream side by the top water entering the inlet port and on its upstream , side by the bottom water. The extension serves to keep the top water separate from the bottom water until the velocity vectors of the two water streams have been aligned, therefore reducing turbulence at the point where the waters mix and merge, and enabling more of the energy to be extracted from the water.
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 August 26, 2005 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.