Hydraulic turbine, wicket gate, and runner apparatus
CA 2173977 A1 · Owner: Hydro West Group, Inc. · Inventors: Gokhman, Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wicket gates (128) and axial flow (106) or mixed flow (176) runner blades for a hydraulic turbine are provided. The wicket gates are arranged circularly around a central axis (X-X) and the gates are pivotable about pivot axes (Y-Y) parallel to the central axis. Each wicket gate has a trailing edge shaped to present a discharge angle (B) that varies from the bottom of the gate to the top of the gate. The shape of the runner blades is a function of the shape of the wicket gates such that the whirl value for fluid flow at substantially every point exiting the runner blades is between about zero and a value that is less than the change in whirl from the inlet to the exit of the runner.
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 October 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2016.
- 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.