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| Number | Title | Issue Date |
| 7393177 | Vertical axis wind turbine with optimized blade profile A high efficiency vertical axis wind turbine includes an optimized blade shape for increased torque output. The shape of the optimized profile includes a camber portion at a leading edge region of the blade with a maximum height to chord ratio (Y/C) at when the non-... | 07/01/2008 |
| 7354247 | Blade for a rotor of a wind energy turbine A blade for a rotor of a wind energy turbine includes opposite upper and lower faces, opposite leading and trailing edges connecting the upper and lower and at least one air outlet opening arranged on at least one of the upper face, the lower face and the trailing e... | 04/08/2008 |
| 7287962 | Construction apparatus and method for a wind power installation Wind power installation technology has seen dramatic developments in the last 20 years. In the meantime there are installations of the order of magnitude of up to 5 MW and future development leads to an expectation of installations with an even greater nominal power... | 10/30/2007 |
| 7217091 | Methods and apparatus for deicing airfoils or rotor blades A method for deicing a rotor blade having a blade root, a blade tip, and a leading edge in which the rotor blade is operably coupled to a hub of a turbine includes circulating heated air through an outflow channel from the blade root towards the blade tip, recircula... | 05/15/2007 |
| 7071578 | Wind turbine provided with a controller for adjusting active annular plane area and the operating method thereof A wind turbine which varies an active annular plane area by composing such that blades are attached to a cylindrical rotor movable in the radial direction of the rotor, the blades being reciprocated in the radial direction by means of a blade shifting mechanism conn... | 07/04/2006 |
| 6957947 | Hydroelectric turbine A hydroelectric turbine anchored in a body of water which produces electricity directly from its housing. The turbine is in and of itself a generator whose housing is its stator and whose blade it its rotor. ... | 10/25/2005 |
| 6877948 | Wind turbine generator A wind turbine generator is disclosed which includes a hub, a plurality of wind driven blades arranged around the hub, a drive belt or drive chain or other mechanical drive driven by the plurality of blades, an electric generator driven by the mechanical drive; and ... | 04/12/2005 |
| 6798080 | Hydro-power generation for a water treatment system and method of supplying electricity using a flow of liquid A hydro-power generation system for use in conjunction with a water treatment system is disclosed. The embodiments of the hydro-power generation system include an impeller rotatably positioned in a housing. The impeller is rotatably coupled with a generator. When wa... | 09/28/2004 |
| 6726439 | Retractable rotor blades for power generating wind and ocean current turbines and means for operating below set rotor torque limits A wind or water flow energy converter comprising a wind or water flow actuated rotor assembly. The rotor comprises a plurality of blades, wherein the blades of are variable in length to provide a variable diameter rotor. The rotor diameter is controlled to fully ext... | 04/27/2004 |
| 6652221 | Water current turbine sleeve mounting A flowing water actuatable turbine system, wherein the turbine system is mounted for operational co-operation with water current by means of an upstanding column/pile in such manner as to be axially displaceable length ways of the column/pile. The turbine... | 11/25/2003 |
| 6481957 | Modular wind energy device A modular wind energy device for converting wind energy into mechanical energy, which includes a support structure configured for placement onto a support surface (36) and defining an axis of rotation (23) generally parallel thereto; one or more panemone ... | 11/19/2002 |
| 6224338 | Polygonal windmill The polygonal windmill is essentially a windmill with the blade components contained within a rigid polygonal frame, preferably cubic in shape. The polygonal windmill relies on its much larger wind surface area rather than high speeds for energy productio... | 05/01/2001 |
| 6126385 | Wind turbine A wind turbine for generating power comprising one or more blades mounted to a shaft for rotational movement in response to an airflow, a housing having a generally central longitudinal axis, the housing surrounding the one or more blades and the shaft, w... | 10/03/2000 |
| 5709419 | Wind energy collection A method and device for collecting energy from wind includes an airfoil having an outer surface defining a leading edge, a central section of greatest breadth adjacent to which a Bernoulli effect reduced pressure region results as an air flow passes over ... | 01/20/1998 |
| 5394016 | Solar and wind energy generating system for a high rise building A solar and wind energy generating system for mounting to a building comprises a wind generator system including at least an auger shaped air engaging member. A plurality of wind generators having air engaging vanes may also be provided. The wind generati... | 02/28/1995 |
| 5386146 | In-line auger driven charging system An in-line fluid medium driven charging system includes a fluid medium driven generator disposed in a fluid medium directing tube. The fluid medium driven generator includes an auger shaped, fluid medium engaging member and is coupled to an electrical gen... | 01/31/1995 |
| 5336933 | Fluid-augmented free-vortex power generating apparatus A fluid-augmented free-vortex power generating apparatus (10) that is driven by either prevailing winds or water and which has a turbine (24) that includes a number of axially extending cup like sails (20) mounted on a freely rotating hub (22). A fluid mo... | 08/09/1994 |
| 5269647 | Wind-powered rotor The present invention relates to a rotor driven by wind power with a vertical rotating axis and radial arms distributed at uniform angular intervals over its periphery which bear bodies with an aerodynamic profile such that one side of the profile exhibit... | 12/14/1993 |
| 5137417 | Wind energy conversion system A wind energy conversion system includes specially shaped blades mounted in a specific location on a specially shaped blade-supporting body to maximize energy conversion from wind energy to electrical energy. The blade-supporting body includes a concave s... | 08/11/1992 |
| 5131805 | Dual axis fluid current motor Apparatus and method for harnessing fluid energy from a fluid current and converting it into mechanical energy. The invention comprises a big wheel and a little wheel where the little wheel rotates about on axis parallel to but offset from an axis about w... | 07/21/1992 |
| 4872804 | Wind turbine having combination wind deflecting and frame orienting means as well as dual rudders A device for generating power from wind which includes a shaft extending in a longitudinal direction and propelling elements mounted on the shaft. The shaft is mounted for rotation in a frame which is also mounted for rotation. The device also includes a ... | 10/10/1989 |
| 4781523 | Fluid energy turbine A fluid energy converter having a squirrel-cage-like rotor in which blades peripherally distributed about a horizontal axis of rotation are in a plane generally parallel to the axis of rotation. An entry at one end of the rotor is arranged to face the onc... | 11/01/1988 |
| 4781522 | Turbomill apparatus and method Turbomill apparatus and method allowing power generation at low velocities of ambient medium, with an anti-stall characteristic of continually rising power output with rising speed at input medium at the same time being rugged to withstand high velocity a... | 11/01/1988 |
| 4692631 | Turbine alternator with a central clear optical path A turbine alternator comprising a central clear optical path through which certain objects or optics may pass unimpeded. This design features a means for internal safe arming of the munition in which the turbine alternator is contained. In addition, this ... | 09/08/1987 |
| 4678394 | Fluid current driven machine employing individually self-governing energy panels The self-governing energy panel is to be used as one of a group of panels designed to collect wind for and govern the speed of the windpowered traveling shaft machine. This machine is designed to convert windpower into other forms of energy (e.g. electric... | 07/07/1987 |
| 4545726 | Turbine A turbine which rotates in the same directional sense for both directions of throughflow of a working medium contains rotor blades possessing an aerofoil-shaped profile which at least over a portion of the length of the rotor blades is subdivided into pro... | 10/08/1985 |
| 4477040 | Aircraft wind energy device A tornado-type wind energy system is provided which is suitable for aircraft in flight or emergency use. Wind energy propels a turbine to provide shaft power to drive an electrical generator or the like. A vortex flow regime is produced downstream of the ... | 10/16/1984 |
| 4365166 | Wind engine with radial flow wheel, partially protected, with fixed blades of large diameter A flowing air or wind responsive engine having a shaft supported by a carrying construction with a radial flow wheel with blades of large diameter fixed to the shaft, the shaft being maintained in a generally horizontal position, and the wheel is provided... | 12/21/1982 |
| 4315713 | Apparatus for generating energy from a flowing medium An apparatus for generating energy from a flowing medium comprises a frame with a rotatable rotor, being composed of two parallel wheels in between which blades are arranged, said rotor being so constructed that the blades maintain a fixed position relati... | 02/16/1982 |
| 4314160 | Wind turbine generator for electrical powered vehicles Means to provide additional electrical power in an electrically powered vehicle. An air scoop is mounted on the vehicle. The air scoop opens in a generally forward direction. A turbine wheel is mounted in the rear of the air scoop. An electric generator i... | 02/02/1982 |
| 4309006 | Tethered airfoil wind energy conversion system A generally toric lighter-than-air gas bag-type airfoil is tethered to the ground at a plurality of angularly widely distributed points about the periphery of the gas bag. A wind turbine is mounted at the entrance to the axially central vent. The tether l... | 01/05/1982 |
| 4303834 | Cable wind mill Disclosed is a wind power generating apparatus for producing megawatt levels of power. The apparatus comprises at least one endless flexible cable supported on the peripheries of two spaced apart wheels. Airfoils are attached to the cable and disposed for... | 12/01/1981 |
| 4288199 | TARP Yaw track means for rotors Yaw track means for fluid impact impellers of a Toroidal Accelerator Rotor Platform (TARP) providing for revolution or yaw motion about a vertical centroidal TARP axis to a plurality of interconnected impact impellers supported and guided on said track me... | 09/08/1981 |
| 4274010 | Electric power generation Electric power is generated from a non-uniformly operating energy source such as wind or water waves by driving hydraulic pump means by a wind wheel or a bobbing float. The pump feeds hydraulic medium into a cylinder to raise a piston loaded by a weight. ... | 06/16/1981 |
| 4266403 | Wind and wave energy generator An apparatus and method of harnessing combined wind and wave energy for generating, e.g., electrical power which includes a first housing held at a fixed height above the bottom of a body of water and having an internal cavity, and a buoyant second housin... | 05/12/1981 |
| 4222242 | Fluid flow transfer A method and apparatus for transferring energy from a first fluid flow to a second fluid flow via vortex generating means. Various embodiments and various support means for elements of the apparatus are also disclosed.... | 09/16/1980 |
| 4221538 | Rotary transducers A rotary transducer adapted to be driven in the same direction by air flow therethrough in either axial direction comprises a rotor having blades of aerofoil cross-section which are fixed with their planes of zero lift normal to the axis of the rotor. An ... | 09/09/1980 |
| 4211084 | Conversion of energy by means of tethered whirlwinds Various low grade forms of energy, particularly superadiabatic ground level air, are used to power a whirlwind. The whirlwind is tethered in a fixed place by confinement of the formative whirl from which the whirlwind arises, permitting the energy contain... | 07/08/1980 |
| 4204795 | Wind collecting method and apparatus An improved wind collecting apparatus utilized for transforming wind energy to rotary motion. The rotary motion is then used to drive an electric generator or the like. The apparatus generally comprises four semi-cylindrically shaped wind collecting blade... | 05/27/1980 |
| 4204126 | Guided flow wind power machine with tubular fans A guided flow wind power machine having inter-meshing tubular fan blades is disclosed. The device includes a main frame which is rotatively mounted to permit it to continuously face the wind directly. The main frame carries three separate power cells each... | 05/20/1980 |
