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US 6,132,181 AGranted
Windmill structures and systems
OwnerFrancis J. McCabeinventor
Life of this patent
Estimating the term…
Abstract
A windmill having a plurality of radially extending blades, each being an aerodynamic-shaped airfoil having a cross-section which is essentially an inverted pan-shape with an intermediate section, a leading edge into the wind, and a trailing edge which has a flange doubled back toward the leading edge and an end cap. The blade is of substantial uniform thickness. An air compressor and generator are driven by the windmill. The compressor is connected to a storage tank which is connected to the intake of a second compressor.
Claims14
A windmill apparatus comprising:
- a windmill, a transmission means connected to said windmill for transmitting the energy from said windmill to an air compression means connected to said transmission means for compressing air;
- said windmill comprising a plurality of blades fixedly connected to and spaced radially about a rotatable first shaft;
- each of said blades having a shape comprising an intermediate face portion and leading and trailing longitudinal edge portions associated with opposite edges of the face portion to form, in cross-section, an essentially pan-shaped structure having a convex surface and a concave surface, and a flange portion extending at an angle of approximately 90 degrees from the trailing edge portion back toward the leading edge portion on the concave side;
- and an end cap on the end of the blade remote from the first shaft.
1 more element
A windmill apparatus comprising:
- a windmill means, a transmission means connected to said windmill for transmitting the energy from said windmill to a generator means connected to said transmission means for generating electricity;
- said windmill comprising a plurality of blades fixedly connected to and spaced radially about a rotatable first shaft;
- each of said blades having a shape comprising an intermediate face portion and leading and trailing longitudinal edge portions associated with opposite edges of the face portion to form, in cross-section, an essentially pan-shaped structure having a convex surface and a concave surface, and a flange portion extending at an angle of approximately 90 degrees from the trailing edge portion back toward the leading edge portion on the concave side, and an end cap on the end of the blade remote from the first shaft.
A windmill apparatus comprising:
- a windmill, a transmission means connected to said windmill for transmitting the energy from said windmill directly to force generation means;
- said windmill comprising a plurality of blades fixedly connected to and spaced radially about a rotatable shaft;
- each of said blades having a shape comprising an intermediate face portion and leading and trailing longitudinal edge portions associated with opposite edges of the face portion to form, in cross-section, an essentially pan-shaped structure having a convex surface and a concave surface, and a flange portion extending at an angle of approximately 90 degrees from the trailing edge portion back toward the leading edge portion on the concave side;
- and an end cap on the end of the blade remote from the shaft.
1 more element
A windmill apparatus comprising:
- a windmill;
- an air compressor;
- a transmission means connected to said windmill for transmitting energy derived from the movement of said windmill to said air compressor for compressing air;
- storage means for storing the air compressed by said compressor, a second air compressor, having an air intake;
- and means connecting said storage means to said air intake to supply compressed air to the intake of said second compressor, said windmill comprising a plurality of blades fixedly connected to and spaced radially about a rotatable shaft;
- each of said blades having a shape comprising an intermediate face portion and leading and trailing longitudinal edge portions associated with opposite edges of the face portion to form, in cross-section, an essentially pan-shaped structure having a convex surface and a concave surface, and a flange portion extending at an angle of approximately 90 degrees from the trailing edge portion back toward the leading edge portion on the concave side;
- and an end cap on the end of the blade remote from the shaft.
4 more elements
Dependencies are inferred from the claim text.