Three bladed Savonius rotor

Rotary kinetic fluid motors or pumps – With means for controlling casing or flow guiding means in... – Natural fluid current force responsive

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C415S907000, C416SDIG004, C416SDIG004

Reexamination Certificate

active

07314346

ABSTRACT:
A Savonius three bladed vertical axis wind turbine rotor has operational characteristics superior to those of conventional three bladed rotors. The blades have high curvature and a high skew factor, for example a curvature of greater than 7:1 (e.g. 2:1-5:1), and a skew factor of greater than 0.6 (e.g. 0.78-0.9). The rotor also includes at least one vertical shaft, the blades operatively connected to the shaft. The rotor typically has an aspect ratio of at least 2:1. The rotor typically has a maximum power coefficient (Cp) of at least twice that of an otherwise identical rotor with a skew factor of 0.5 or less. The rotor can drive a generator with a drive which automatically increases the effective gear ratio as the rotational speed of the rotor increases; or the rotor can be connected to a propeller of a multihull wind powered boat.

REFERENCES:
patent: 1697574 (1929-01-01), Savonius
patent: 1768765 (1930-06-01), Savonius
patent: 2677344 (1954-05-01), Annis
patent: 4156580 (1979-05-01), Pohl
patent: 4191507 (1980-03-01), DeBerg
patent: 4274011 (1981-06-01), Garfinkle
patent: 4359311 (1982-11-01), Benesh
patent: 4362470 (1982-12-01), Locastro et al.
patent: 4371346 (1983-02-01), Vidal
patent: 4715776 (1987-12-01), Benesh
patent: 4784568 (1988-11-01), Benesh
patent: 4830570 (1989-05-01), Benesh
patent: 4838757 (1989-06-01), Benesh
patent: 5083039 (1992-01-01), Richardson et al.
patent: 5984814 (1999-11-01), Davenport
patent: 6293835 (2001-09-01), Garlov
patent: 6428275 (2002-08-01), Jaakkola
patent: 6608397 (2003-08-01), Makino et al.
patent: 2002/0131864 (2002-09-01), Vos et al.
patent: 2004/0265116 (2004-12-01), Kaneda
patent: 4016622 (1991-11-01), None
patent: 244414 (1926-09-01), None
patent: 55069768 (1980-05-01), None
patent: 58187587 (1983-11-01), None
patent: 2101553 (1998-10-01), None
patent: WO2004.113721 (2004-06-01), None
Blackwell et al, “Wind Tunnel Performance Data for Two and Three Bucket Savonius Rotors”, Sandia Labs, SAND76-0131, Jul. 1977, pp. 1,3,10-21 & 29-34.
Khan, “Model and Prototype Performance Characteristics of Savonius Rotor Windmill”, Wind Engineering, vol. 2, No. 2, 1978, pp. 75-85.
Boll, “More on The Savonius SuperRotor”, Mother Earth News, No. 28, Jul./Aug. 1974.
Saha et al, “Twisted Bamboo Bladed Rotor For Savonius Wind Turbines”, 2004.
Rahman, “Torque and Draf Characteristics of a Three Bladed Savonius Rotor”, sss.buet.ac.bd/daers/mscthesis/mscme.htm, Sep. 1999, Abstract.
Idan et al, “Continuous Variable Speed Wind Turbine Transmission Concept and Robust Control”, Wind Engineering, vol. 24, No. 3, 2000, pp. 151-167.
Johnson, Gary L., Wind Energy Systems, “Methods of Generating Synchronous Power”, Nov. 21, 2001, pp. 5-1 thru 5-4.
Gigliobianco et al, “A Self-Trimming . . . Catamaran”, AYRS 112, 1993, pp. 29-32.
Rensselaer School of Engineering, “Winding Upward with Corks and Turbines”, www.eng.rpi.edu, Sep. 20, 2003.
Turner, Lance, “Making a simple Savonius wind turbine”, www.aya.org.au/70byosav.htm, admitted prior art.
Popular Science, Jul. 1933, “New Rotor Ship Sails in Lightest Winds”.
Hayashi et al, “Wind Tunnel Tests on a Three-stage Out-phase Savonius Rotor”, 2004.
Environmental Building News, vol. 13, No. 4, Apr. 2004, “Solar-and Wind-Powered Outdoor Lighting from MoonCell”.
LandRider Owner's Manual, Version 7, 2002, pp. 13-20.
“Our Wind Turbine”, www.windausenergy.com, 2004.
WS-models, 2002, www.windside.com.
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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Three bladed Savonius rotor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Three bladed Savonius rotor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three bladed Savonius rotor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2791707

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.