Prime-mover dynamo plants – Fluid-current motors – Wind
Reexamination Certificate
2000-06-13
2002-09-17
Waks, Joseph (Department: 2834)
Prime-mover dynamo plants
Fluid-current motors
Wind
C290S044000, C290S052000, C416S004000, C416S179000
Reexamination Certificate
active
06452287
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is a lower cost more efficient windmill which operates over a wider spectrum of wind speeds than existing windmills, thereby placing energy production within the reach of individuals.
2. Description of the Related Art
Horizontal axis windmills have not basically changed for about a thousand years. Such windmills still consist of a group of sails (now called blades) affixed radially to a rotating shaft. No economically feasible structure has been implemented to dramatically increase efficiency. Present windmills are not economically feasible unless placed in the few mountain passes or ridge locations where high winds blow much of the time. Even in those few high wind locations the windmills must be of very large diameter, therefore expensive, heavy and high maintenance, and must be stopped to avoid damage in winds above approximately 35 mph. The above shortcomings of prior art windmills have kept wind power from furnishing a substantial portion of energy needs.
BRIEF SUMMARY OF THE INVENTION
The windmill according to this invention includes a support arm horizontally pivoting from one of its ends upon a vertical axis bearing atop a mounting mast, the other end of the support arm fixedly supporting a stator providing both windmill stator functions and generating mechanism stator functions. The stator also supports airflow straightening fins extending radially from the stator close in front of the windmill blades, the outer end of the fins supporting a shroud band encircling the fan just outside the tips of the rotating blades. The stator mounts a coaxial horizontal axis dual function rotor which furnishes windmill blade rotor function as well as energy generating rotor functions, whether for electricity, air pumping or rotating shaft energy.
The objects of this invention follow:
Eliminate efficiency loss from vortex generation at each blade tip.
Eliminate efficiency loss due to induced spiral flow in front of the blade disk.
Eliminate weight, cost and efficiency penalties by providing a single simple low cost support arm which performs the five functions of supporting the windmill, aligning it into the wind, elevating it downwind above mounting mast turbulence, contribute to the elimination of induced spiral air circulation in front of the blade disk, and provide a conduit for transmitting the energy produced to the mounting mast.
Eliminate weight and cost penalties by providing a single dual function stator which provides both windmill stator functions and energy producing mechanism stator functions.
Eliminate weight and cost penalties by providing a single dual function rotor which provides both windmill rotor functions and energy generation rotor functions.
Eliminate energy loss by not using a separate transmission device such as shafts, bearings and gears, between the windmill rotor and the energy generating device.
Eliminate weight and cost penalties, by not needing any device to stop the windmill from operating in any high wind.
Gain efficiency by being able to harvest more low velocity winds as well as all high velocity winds.
Eliminate energy loss by having the windmill less sensitive to the effects of wind gusts.
All or most of the above-named inefficiencies and penalties are inherent in present state-of-the-art windmills now being manufactured and used.
REFERENCES:
patent: 1233232 (1917-07-01), Heyroth
patent: 1465174 (1922-06-01), Porter
patent: 1944239 (1934-01-01), Honnef
patent: 4075500 (1978-02-01), Oman et al.
patent: 4140433 (1979-02-01), Eckel
patent: 4183717 (1980-01-01), Yamada
patent: 4237384 (1980-12-01), Kennon
patent: 4288704 (1981-09-01), Bosard
patent: 4291235 (1981-09-01), Bergy, Jr. et al.
patent: 4324985 (1982-04-01), Oman
patent: 4366779 (1983-01-01), Knecht
patent: 4367413 (1983-01-01), Nair
patent: 4385871 (1983-05-01), Beisel
patent: 4444543 (1984-04-01), Wilks et al.
patent: 4613279 (1986-09-01), Corren et al.
patent: 4648801 (1987-03-01), Wilson
patent: 4671742 (1987-06-01), Gyimesi
patent: 4720640 (1988-01-01), Anderson et al.
patent: 5315159 (1994-05-01), Gribnau
patent: 5506453 (1996-04-01), McCombs
patent: 5599172 (1997-02-01), McCabe
patent: 5669758 (1997-09-01), Williamson
patent: 5746576 (1998-05-01), Bayly
patent: 5844324 (1998-12-01), Spriggle
patent: 5910688 (1999-06-01), Li
patent: 6064123 (2000-05-01), Gislason
patent: 6127739 (2000-10-01), Kari Appa
patent: 6177735 (2001-01-01), Chapman et al.
patent: 6285090 (2001-09-01), Brutsaert et al.
patent: 3339462 (1984-05-01), None
patent: 3244719 (1984-06-01), None
patent: 3402035 (1985-07-01), None
patent: 3638129 (1988-05-01), None
patent: 00115131 (1980-03-01), None
patent: 24851064 (1981-12-01), None
Standard Handbook for Mechanical Engineers ( McGraw-Hill ) 7th Ed. 1967. pp. 9-8 thru 9-13, Article on Windmills by E.N. Fales. A copy is attached.
Article from Machine Design magazine, May 20, 1976, p. 18-25 Something in the Wind? ERDA thinks so ) by T. W. Black.
Article from Machine Design magazine, Jun. 10, 1976, p. 26 thru 32. “Advanced Turbine Designs Boost Windpower Potential” by Theodore W. Black.
Owners Manual—Airwind Module and Air Marine ( Windmills) Southwest Windpower Inc., Flagstaff, AZ 86004.
David Anderson and Scott Eberhardt,Sport Aviation, “How Airplanes Fly: A Physical Description of Lift”, Feb. 1999, pp. 85-95.
Brinks Hofer Gilson & Lione
Waks Joseph
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