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| Number | Title | Issue Date |
| 8167555 | Horizontal axis wind turbine Disclosed a horizontal axis wind turbine including: a rotor; a nacelle; a tower; an independent pitch control device; and a yaw control device, wherein the horizontal axis wind turbine is an up-wind type one including a waiting mode, wherein (1) the independent pitc... | 05/01/2012 |
| 7384239 | Drive device for a windmill provided with two counter-rotative propellers The drive device is provided for inclusion in a windmill with two counter-rotating screws. The shafts of the screws are each connected to a spindle of an epicyclical gearbox, the third spindle providing the energy for the user. The device further comprises a brake d... | 06/10/2008 |
| 7347667 | Wind power installation This relates to a wind power installation comprising a pylon (tower) and a rotor arranged on the pylon and having at least one individually adjustable rotor blade. The wind power installation further comprises a device to detect the wind direction, a device to detec... | 03/25/2008 |
| 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 |
| 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 |
| 7204673 | Method of controlling a wind power installation A method for controlling a wind power installation at very high wind speeds, in which there is predetermined a first wind speed at which the rotor blades of the wind power installation are put into a first predetermined setting. In addition, the method includes cont... | 04/17/2007 |
| 7175389 | Methods and apparatus for reducing peak wind turbine loads A method for reducing peak loads of wind turbines in a changing wind environment includes measuring or estimating an instantaneous wind speed and direction at the wind turbine and determining a yaw error of the wind turbine relative to the measured instantaneous win... | 02/13/2007 |
| 7161314 | Motor control apparatus having current supply phase correction In a motor-driven shift position switching device, when the difference between a target position and the rotation position of a rotor has become smaller than a prescribed value in a motor feedback control, a transition is made to a deceleration control. A phase lead... | 01/09/2007 |
| 7141887 | Power supply unit, generator, and wind turbine generator A power supply unit inclding a battery 4 that stores electric power used for operations of various devices; a dynamo 19, a rotation support mechanism 14, and a rectifying section 32 as charging means that converts natural energy into elec... | 11/28/2006 |
| 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 |
| 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 |
| 6972498 | Variable diameter wind turbine rotor blades A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can ... | 12/06/2005 |
| 6902370 | Telescoping wind turbine blade A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free to move in a longitudinal direction relative to the fixed blade sect... | 06/07/2005 |
| 6857846 | Stackable vertical axis windmill A stackable, vertical axis windmill comprised of a braced external frame that enables stacking of multiple windmill assemblies. Couplings are located on both ends of the vertical rotor shaft to enable stacking and the transmission of power, an internal wind flow cav... | 02/22/2005 |
| 6837681 | Wind power plant with a particle sensor Wind power installations using more modern technology have long been known. Such wind power installations have rotors comprising at least one or more rotor blades. The rotors and accordingly the rotor blades carried thereby of wind power installations are subjected ... | 01/04/2005 |
| 6193464 | Active brake control for rotor/wing aircraft The present invention comprises a feedback-controlled braking apparatus that applies a modulated braking force that smoothly decelerates a rotating shaft such that it comes to rest at a precise location. According to a preferred embodiment of the present ... | 02/27/2001 |
| 6000907 | Fluid-activatable vane for a fluid turbine A fluid-activatable vane is defined by a thin vane body having opposed narrow leading and trailing side edges and opposed substantially smooth large top and bottom surfaces. The body has a central longitudinal axis and is substantially symmetrical on oppo... | 12/14/1999 |
| 5855471 | Helicopter rotor brake assembly A helicopter rotor brake assembly for arresting rotational movement of a main rotor drive shaft, wherein the helicopter rotor brake assembly is mechanically interconnected with the main rotor drive shaft through a main transmission. The helicopter rotor b... | 01/05/1999 |
| 5765672 | Overheating protection device for rotational control apparatus A device (10) is disclosed for intercepting the input of a system (23) of an internal combustion engine (12) normally provided to a solenoid valve (22) for actuating a fan clutch (20) when rotation of a fan (16) is desired. The input is received by termin... | 06/16/1998 |
| 5183387 | Fault-tolerant apparatus for controlling blade pitch Fault-tolerant apparatus for controlling first and second input members of a mechanical actuator includes first and second electrical machines and at least two controllers. The first and second electrical machines, which apply braking forces to the first ... | 02/02/1993 |
| 4867642 | Wind mill wing with air brake By mounting an axle (18,19) in a wind mill wing (1) having a wing tip (22) capable of swinging out by means of a mounting (2,7,8) which may be bolted to the wing and which can furthermore squeeze about the axle (18), it is possible to mount this mounting ... | 09/19/1989 |
| 4799354 | Turbopropeller or turbofan gas turbine engine A turbopropeller, or turbofan, gas turbine engine comprising a single spool core engine arranged to drive a propeller, or a fan, via gear means may be provided with a starter motor, and a clutch means. The clutch means disengages the propeller, or fan, from th... | 01/24/1989 |
| 4715782 | Hydraulic control device for wind turbine A hydraulic speed control device for limiting the speed of a wind turbine rotor by controlling the deployment of rotor braking devices includes four fluidicly interconnected elements: one or more fluid cylinders, a relief valve, an accumulator, and a chec... | 12/29/1987 |
| 4710101 | Wind turbine A wind turbine for a wind turbine electrical generator set in which movable nose portions are located at or adjacent the leading edge of the blade and at or adjacent the tip of the blade but is dispaceable purely longitudinally of the blade, i.e. radially... | 12/01/1987 |
| 4692095 | Wind turbine blades Wind turbine blades for use e.g. in generating electricity are described in which the blades have fixed lift spoilers in the form of deep spars projecting on the normally high pressure side of the blades where they are relatively ineffective, but which, i... | 09/08/1987 |
| 4678401 | Rotor control system A helicopter rotor control system (13) including a stop azimuth controller (32) for establishing the value of a deceleration command (15') to a deceleration controller (23), a transition azimuth predictor (41) and a position reference generator (55), whic... | 07/07/1987 |
| 4676459 | Double propeller for propelling aircraft Double propeller for propelling aircraft, with two coaxially and axially offset propellers that can be driven separately by associated drive mechanisms through a central shaft and a hollow shaft. To reduce noise and maintain safe operation even when one p... | 06/30/1987 |
| 4664596 | Vertical axis wind turbine and components therefor Wind turbines, improved gear box assemblies, sub-assemblies and components therefor, and a braking system adaptable for use with such wind turbines and improved gear box assembly.... | 05/12/1987 |
| 4665332 | Electric generator assembly for a projectile A rotational brake member controls the rotational velocity of an electric generator assembly housed within a projectile. The assembly includes an air-driven turbine and an electric generator. The brake member is affixed to the turbine which drives a rotat... | 05/12/1987 |
| 4659284 | Wind turbines, improved gear box assemblies, and a braking system adaptable for use with such wind turbines and improved gear box assembly Wind turbines, improved gear box assemblies, sub-assemblies and components therefor, and a braking system adaptable for use with such wind turbines and improved gear box assembly.... | 04/21/1987 |
| 4642029 | Brake for counter rotating bladed members In an aircraft propulsion system including a gas turbine engine driving a pair of counter rotating bladed members through a planetary gear set, a brake for simultaneously retarding rotation of both bladed members after engine shut-down includes a pair of ... | 02/10/1987 |
| 4620834 | Wind machine with clutch having losh motion characteristic This invention concerns a wind driven machine including a clutch mechanism for connecting a rotary output shaft from a wind driven member to a second shaft adapted to be rotated by the output shaft. The mechanism comprises a clutch drive portion arranged ... | 11/04/1986 |
| 4613763 | Wind driven electric power generating system The shaft of a wind driven propeller is coupled to the rotor shaft of an electrical generator through an over-running centrifugal clutch and a speed changer mechanism. When the wind attains a certain velocity, a propeller shaft speed responsive device clo... | 09/23/1986 |
| 4578019 | Ram air turbine Apparatus and methods for adjusting the pitch of a fluid reactive blade member carried upon a rotor in response to a speed difference between the rotor and a reference speed shaft.... | 03/25/1986 |
| 4575309 | Wind turbines A wind turbine having the tips of the blades pivotable to a position in which they act as brakes to slow the turbine down. The pivoting is caused by relative axial movement of the tip and main blade portions which is caused by the action of a spring. The ... | 03/11/1986 |
| 4567965 | Propeller brake A propeller brake for an engine having a propeller shaft includes a housing (10) and a brake shaft (18) rotatably mounted in the housing (10). The brake shaft (18) is coupled to the propeller shaft to rotate therewith. Also included is a brake (64,74) and... | 02/04/1986 |
| 4565929 | Wind powered system for generating electricity A fixed pitch wind turbine rotor (18) is teeter mounted (76, 78, 80) onto a low speed input shaft (44) which is connected to the input (58) of a step-up transmission (46). The output (48) of the transmission (46) is connected to a rotary pole amplitude mo... | 01/21/1986 |
| 4557666 | Wind turbine rotor A fixed pitch wind turbine rotor (18) is teeter mounted (76, 78, 80) onto a low speed input shaft (44) which is connected to the input (58) of a step-up transmission (46). The output (48) of the transmission (46) is connected to a rotary pole amplitude mo... | 12/10/1985 |
| 4556259 | Air brake system A compressed air brake system including a low pressure control circuit and a high pressure operating circuit. The control circuit is interfaced by a plurality of relay valves with the operating circuit for the direct actuation of the wheel brake cylinders... | 12/03/1985 |
| 4518312 | Dual fold tail vane assembly for wind energy systems An improvement of the device disclosed in U.S. Pat. No. 4,297,075 permits the propeller assembly of a wind energy system to swing in two directions, both left and right with respect to wind direction. The improvement includes a snubber assembly which has ... | 05/21/1985 |
