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| Number | Title | Issue Date |
| 7436083 | Up-wind type windmill and operating method therefor A structure of an upwind type wind turbine and the operating method thereof capable of preventing the occurrence of damage of the blades by evading excessive irregular loads from acting on the blades in the slanting direction in the event of power failure when stron... | 10/14/2008 |
| 7368828 | Wind energy system A wind energy system comprising a queue of turbines housed in a horizontal air conduit. The inlet end of the conduit opens into a wind collector assembly, which preferably comprises in part downwardly extending earthen slope, such as a hillside or embankment. The wi... | 05/06/2008 |
| 7355294 | Method and system for wind turbine blade movement This document discusses, among other things, a wind turbine blade pitch system for moving the blades to control their pitch in the event of a power failure. The system includes at least one backup that has a non-electrical component that can pitch the blades in the ... | 04/08/2008 |
| 7334936 | Mixing device and method of mixing The present invention is a mixing device and a method of mixing viscous fluids with a mixing device. The mixing device includes a shaft and a support mounted for rotation with the shaft. A plurality of vanes extend from the support and are mounted for rotation with ... | 02/26/2008 |
| 7331761 | Wind turbine pitch bearing and method A pitch bearing and related method for wind electric turbines has an annularly-shaped first bearing ring connected with an associated wind turbine blade, and includes a first raceway groove. An annularly-shaped second bearing ring is connected with the rotor portion... | 02/19/2008 |
| 7317260 | Wind flow estimation and tracking using tower dynamics A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sens... | 01/08/2008 |
| 7276810 | Wind power plant based on the windmill principle with an additional vane bearing at the vane end The present invention concerns a wind power plant with a central rotor unit (1); a ring carrier element (2), which surrounds the central rotor unit (1) in a concentric configuration; and with several rotor vanes (3) which are fixed with a... | 10/02/2007 |
| 7276809 | Wind turbine assembly and related method Wind turbine assembly, and related method, is provided that exploits an aerodynamically enhanced wind region of a building in proximity to a parapet of the building. A wind turbine assembly includes a support assembly configured to couple to a building in proximity ... | 10/02/2007 |
| 7255527 | Wind power generator A wind power generator has a base, a wind driving wheel, a transmission unit and a power storage unit. The wind driving wheel has a spindle at a center of the wind driving wheel. The spindle is positioned to the lateral frame. A plurality of connecting frames are ex... | 08/14/2007 |
| 7218013 | Wind powered generator A wind powered electrical generation assembly having a portable wind powered generator tower for supporting a wind powered generator allowing the wind powered generator to be raised, lowered, and removed from the tower. The wind powered electrical generation assembl... | 05/15/2007 |
| 7215037 | Protective wind energy conversion chamber A protective wind energy conversion chamber provides a protected multiple turbine mechanism axially aligned to convert kinetic energy of a moving fluid (e.g., wind) into rotational mechanical power by the reaction of the moving fluid with the turbine. The conversion... | 05/08/2007 |
| 7190086 | Wind energy plant with an asynchronous machine for determining the azimuth position An asynchronous machine has a first rotor/stator arrangement in which the rotor is connected to a shaft, and a method of controlling such an asynchronous machine is provided. A drive is provided which permits nullification of the play of the mechanical components in... | 03/13/2007 |
| 7165941 | Method and apparatus for use in construction of wind power installation and wind power installation employing same One aspect of the present invention concerns a process for mounting rotor blades to a rotor hub of a wind power installation in situ. In order to avoid high torques in the mechanical train of the wind power installation in the operation of mounting the rotor blades,... | 01/23/2007 |
| 7155875 | Method of forming a perimeter weighted foundation for wind turbines and the like A perimeter weighted foundation has a central pier pedestal and an enlarged base spaced outwardly and extending below the pedestal. The enlarged base includes an outer concentric perimeter wall section with a radially extending, disk-shaped spread section interconne... | 01/02/2007 |
| 7108485 | Reduction in the noise produced by a rotor blade of a wind turbine Rotor blades for wind power installations are known in many different forms. In a wind power installation the rotors or the rotor blades thereof represent the main source of sound. For reasons relating to acceptance and noise prevention laws, the aim should/must be ... | 09/19/2006 |
| 7084522 | Wind energy unit comprising a hollow shaft for rotor hub and generator In a wind power installation with a (hollow) axis tube member and a hollow shaft mounted thereon for the rotor there is provided only a single bearing which also carries moments, between the axis tube member and the hollow shaft, whereby the parts of the machine whi... | 08/01/2006 |
| 7082889 | Flag display device A device and method for displaying a flag at night under a light, wherein the flag is attached to a vertical rope, and a weight is attached to the bottom of the rope. The rope and flag can be easily raised or lowered, and the flag will fly in any wind direction with... | 08/01/2006 |
| 7066709 | Wind driven power generating system The present invention discloses a wind driven power generator. The wind driven power generating system comprises: a) an aerodynamic unit rotatably mounted at the top of a tower having a certain height; b) a plurality of rudders for aligning the aerodynamic unit with... | 06/27/2006 |
| 7063501 | Multi-rotor wind turbine with generator as counterweight A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream... | 06/20/2006 |
| 7042113 | Hydroelectric generator A hydroelectric generator having a fixed axle, at least one transmission axle parallel to the fixed axle, and a transmission system configured to rotate the transmission axle about the fixed axle and to apply a force to at least one driven member of a device for gen... | 05/09/2006 |
| 7018167 | Fluid machinery An object is to improve the durability of wings and suppress vibration of the wings and generation of noise. A fluid machine includes a rotatably supported wing support, and a plurality of wings (21) formed on the wing support at a plurality of circumferentia... | 03/28/2006 |
| 7014416 | Control vane for a wind turbine A wind turbine uses a support tower with a rotatable upper portion supporting an electric generating turbine. A set of radially oriented blades rotate in a vertical plane. A control vane is mounted on a hinge bar and is movable vertically along the bar as well as bi... | 03/21/2006 |
| 7007248 | Method and apparatus for implementing engineering change orders A tool and method for implementing engineering change orders. The tool and method provides that a change file is checked, equivalent engineering change orders are computed and applied to an active cell. The engineering change orders are registered with a pre-determi... | 02/28/2006 |
| 6998729 | Wind energy plant having an observation platform The invention concerns a wind power installation comprising a rotor which is coupled to a generator within a machine housing. Such wind power installations have already long been known, for example the wind power installations of types E-40 and E-66 from Enercon, Au... | 02/14/2006 |
| 6979175 | Downstream wind turbine A downstream wind turbine for converting wind energy into electrical energy. In a preferred embodiment the downstream wind turbine adapted to respond to high winds and gyroscopic precession. The downstream wind turbine comprises a support tower; a yaw bearing attach... | 12/27/2005 |
| 6971788 | Fluid mixing device A mixing device includes vanes arranged so that the outer edges of the vanes define a frusto-conical surface in order to facilitate improved circulation of the liquid being mixed. Each vane is preferably curved, either lengthwise, widthwise, or both. In one embodime... | 12/06/2005 |
| 6945752 | Azimuthal driving system for wind turbines Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. Multiple azim... | 09/20/2005 |
| 6942454 | Vertical axis wind turbine The vertical axis wind turbine has two counter-rotating rotors mounted on first and second spaced apart vertical axes. Each rotor has a plurality of rotor blades extending generally inwardly from an outer circumference, the vertical axes being mounted on a support s... | 09/13/2005 |
| 6940186 | Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at... | 09/06/2005 |
| 6929450 | Turbine apparatus and method A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connecte... | 08/16/2005 |
| 6927502 | Three-phase asynchronous motor driven azimuthal drive for wind power installations Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. That drive wh... | 08/09/2005 |
| 6142757 | Integral oil pump An integral oil pump for an apparatus having a plurality of bearings, the oil pump comprising a housing with an opening for a shaft, a cavity within the housing, a ring gear encircling the shaft with clearance between the shaft and an inner surface of the... | 11/07/2000 |
| 6132181 | Windmill structures and systems 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 ha... | 10/17/2000 |
| 6132172 | Windmill An improved windmill includes a conical rotor unit, a frame for supporting the conical rotor unit and a base for supporting the frame. The conical rotor unit has a conical rotor with a plurality of spaced curved blades disposed thereon and a plurality of ... | 10/17/2000 |
| 6113350 | Vertical-axle power machine A vertical-axle wind power machine comprises a vertical axle, a plurality of jointed radial arms, a plurality of counterbalanced oblique blades at the support points thereof, a friction-rewarding rotary speed multiplying transmission, and an automatic rot... | 09/05/2000 |
| 5855470 | Wind wheel with rotationally faced plates This invention accomplishes these and other objectives with a wind wheel (1) having at least one planetary gear wheel (10) affixed rigidly to a wind-wheel axle (2) from which gear trains for each of a plurality of wind-wheel plates (9) are rotated to maxi... | 01/05/1999 |
| 5669758 | Wind turbine A wind turbine having a central deflecting cone and a shroud surrounding the cone. The shroud in cooperation with the cone direct air flow to turbine blades which extend across the narrowest gap between said shroud and said cone. The wind turbine is rotat... | 09/23/1997 |
| 5584655 | Rotor device and control for wind turbine A wine turbine with blades having a high lift-to-drag ratio is provided. A hydraulic or other control system is used to control cone angle, such as in response to flap moment. Pitch of blades is controlled, such as in relation to the blade flap angle. Tee... | 12/17/1996 |
| 5178518 | Free-yaw, free-pitch wind-driven electric generator apparatus Wind-driven electric generator apparatus has a generator head supported on a tower for free-yaw movement and for free-pitch movement within predetermined limits. The generator head has a downwind rotor with a pair of elongated blades mounted on a hub that... | 01/12/1993 |
| 4966525 | Yawing device and method of controlling it A windmill is provided with a yawing device which includes two or more gear motors disposed about the periphery of a stationary tower toothed rim. Each gear motor has a driving wheel attached at an end thereof for engaging the toothed rim. By applying a s... | 10/30/1990 |
