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US 8,070,449 B2Granted
Wind turbine
AssigneeAbsolute Turn, Inc.
InventorsRoy H. Urban, Robert Lewandowski
Life of this patent
Estimating the term…
Abstract
A vertical-axis wind turbine for use with an electrical generator for producing power by converting the energy of wind currents into mechanical rotational energy which is then used to operate the electrical generator. In an embodiment, a rotor is responsive to wind currents by imparting rotation upon a central vertical shaft. Preferably, the rotor is designed with functional curved surfaces for efficient operation.
Claims20
A vertical-wind axis turbine comprising:
- a frame fixedly extending in a substantially vertical orientation;
- a power train mounted to the frame;
- an electrical generator attached below the power train;
- a rotor shaft rotably mounted to the frame extending in a substantially vertical orientation;
- a rotor blade assembly attached to the shaft comprising an outer skin defining a blade surface having a leading edge and a trailing edge with a cord extending from the leading edge to the trailing edge, each side of the blade surface having a convex portion and a concave portion wherein the concave portion of one of the sides crosses the cord at a single occurrence.
2 more elements
An apparatus comprising:
- a rotor shaft;
- and,
- a rotor blade assembly attached to the rotor shaft comprising an outer skin defining a blade surface having a leading edge and a trailing edge with a cord extending from the leading edge to the trailing edge, each side of the blade surface having a convex portion and a concave portion wherein the concave portion of one of the sides crosses the cord and the mean camber line is generally S-shaped.
An apparatus comprising:
- a rotor shaft having a longitudinal axis;
- a rotor blade assembly attached to the rotor shaft comprising an outer skin defining a blade surface having a leading edge and a trailing edge with a cord extending from the leading edge to the trailing edge, each side of the blade surface having a convex portion and a concave portion wherein the concave portion of one of the sides crosses the cord at a single occurrence and the mean camber line is generally S-shaped and intersects with the longitudinal axis of the rotor shaft;
- and,
- wherein the rotor blade has a pair of ends with end plates attached thereto and each end plate has a cord that is offset from the cord of the blade.
1 more element
Dependencies are inferred from the claim text.