Hydraulic turbine
CA 2049775 A1 · Owner: Eda, Hiroshi · Inventors: Eda, Takeichi; Edealcard Inc.; Eda, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic turbine comprises a rotatably supported circular body, a plurality of vanes radially provided in a circumference of the circular body. A water-permeable perforated plate is arranged to extend over an external periphery of the vanes to form a plurality of enclosed chambers in the circumference of the circular body. An elastic bag is contained in each of the chambers. The bags are filled with an appropriate pressure of air. A receptacle having a circular bottom portion rotatably receives therein a bottom portion of the circular body in an enclosing manner. The receptacle is provided with an inlet port and an outlet port to take in and discharge water respectively.
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 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 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.