Hydraulic engines with at least two counterrotating runners
CA 2199781 A1 · Owner: Jean, Yves M. · Inventors: Jean, Yves M.; Netsch, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic turbine or pump without entry or exit guide vanes supported by a cantilevered stationary tube having a pair of concentric counterrotating first and second shafts with an exit section inclined at an angle relative to the axis of the shafts. A first runner is mounted to the first shaft, including at least a pair of radially extending first blades. A second runner is mounted to the second shaft and adapted for counterrotation relative to the first runner. The second runner has at least a pair of radially extending second blades. The pitch of the first and second runner blades is equal or different but inversed where the, runners have opposite, either equal or different rotating …
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 March 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2019.
- 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.