Marine propulsion – Wind driven motors
Reexamination Certificate
2006-04-24
2008-05-13
Sotelo, Jesús D (Department: 3617)
Marine propulsion
Wind driven motors
C416S19700C
Reexamination Certificate
active
07371135
ABSTRACT:
A Savonius vertical axis wind turbine (VAWT) rotor is easily and simply constructed while having enhanced functionality. The rotor includes a shaft that is vertical in use, a number (desirably at least four) of vane support hubs each having a number (desirably three) of at least partially curved spokes extending radially outwardly, and a number of vanes corresponding to the number of spokes. The vane support hubs are operatively connected directly to the shaft and spaced vertically from each other along the shaft to provide a plurality of sets of vertically spaced spokes. The vanes, one for each set of spokes, are operatively connected to the spokes to provide surface area for engaging wind and rotating the shaft when in use. Desirably the vane support hubs are operatively connected to the shaft using mechanical fasteners, and the vanes are connected to the spokes using mechanical fasteners. Structural end caps are not necessary, and therefore the rotor is devoid of them. The vane support hubs and spokes are desirably integral and made of metal or fiber reinforced plastic, and the vanes may be made of sheet metal. Further provided is a vane support assembly for a Savonius or open helix VAWT including a vane support hub defining an opening, a number of at least partially curved spokes integral with the vane support hub and extending radially outwardly, and an adaptation part of the hub which allows it to be operatively connected to a shaft extending through the opening. Also provided is a complete Savonius or open helix VAWT.
REFERENCES:
patent: 1697574 (1929-01-01), Savonius
patent: 1766765 (1930-06-01), Savonius
patent: 2677344 (1954-05-01), Annis
patent: 4191507 (1980-03-01), DeBerg
patent: 4293274 (1981-10-01), Gilman
patent: 4359311 (1982-11-01), Benesh
patent: 4715776 (1987-12-01), Benesh
patent: 4830570 (1989-05-01), Benesh
patent: 6910873 (2005-06-01), Kaliski
patent: 7241105 (2007-07-01), Vanderhye et al.
patent: 244414 (1926-09-01), None
patent: 58187587 (1983-11-01), None
patent: 11294313 (1999-10-01), None
Usiyama et al; Optimum Design Configuration and Performance of Savonius Rotors; “Wind Engineering”, vol. 12, No. 1, 1988, pp. 59-75.
Moutsoglou et al; Performance Tests of a Benesh Wind Turbine Rotor; “Wind Engineering”, vol. 19, 1995, pp. 349-362.
Blackwell et al; Wind Tunnel Performance Data for Two- and Three-Bucket Savonius Rotors; SNAD76-0131; Jul. 1977; pp. 3, 13-21,29-32.
Turner; Making a simple Savonius Wind Turbine; www.ata.org.au/70byosav.htm; admitted prior art.
Khan; Model and Prototype Performance Characteristics of Savonius Rotor Windmill; Wind Engineering, vol. 2, No. 2, 1978, pp. 75-85.
Applegate Nicolas C. S.
Dukes Douglas M.
Leone Nicolas J.
Sedlak Joseph
Signor Jason S.
Sotelo Jesús D
Vanderhye Robert A.
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