Vertical axis water turbine
CA 2305772 A1 · Owner: Valavaara, Viljo K. (Deceased) · Inventors: Round, George F.; Valavaara, Viljo K. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low speed water driven turbine (10) having a housing (12) to be erected upright in a water course, a water intake and a water outlet a drive shaft , (34) rotatably mounted along a central axis of the housing a shaft sleeve , (36) non-rotatably mounted in the housing and supporting and enclosing the shaft, a guide casing (40) of generally bell-like shape and defining a lower edge, the casing being connected to the shaft sleeve within the housing and extending outwardly from the sleeve to define a reduced cross-sectional area within the housing in the region of the guide casing a turbine blade mounting , hub (48) driveably mounted at the lower end of the shaft a plurality of , turbine …
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 September 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2020.
- 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.