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| Number | Title | Issue Date |
| 8162608 | Wind turbine, yaw system controller and yaw system for a wind turbine and method of reducing the loads acting on such a yaw system Wind turbine, yaw system controller and yaw system for a wind turbine and method of reducing the loads on such a yaw system. A method for reducing the loads acting on a wind turbine yaw system (19) due to yawing moments which are induced to the yaw sys... | 04/24/2012 |
| 8123479 | Method to minimize oscillation in ceiling fans A fan system includes a fan and a fan rotation speed control. The speed control is operable to command the fan to rotate at a speed selected from a certain range of rotation speeds. A fan oscillation detector may be coupled with the fan to detect oscillation of the ... | 02/28/2012 |
| 7988413 | Vertical axis wind turbine A vertical axis wind turbine includes an upstanding support structure, a plurality of generators disposed on the support structure, a central shaft in rotatable communication with the generators and positioned along a central axis of the vertical-axis wind turbine, ... | 08/02/2011 |
| 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 |
| 7347669 | Sensor-actuated power fan A remotely operable motorized fan includes an elongated support shaft that has top and bottom end portions, and a housing that defines a cavity therein and includes a tubular lower flange positioned about the top end portion of the support shaft. The housing include... | 03/25/2008 |
| 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 |
| 7303373 | Wind turbine systems, monitoring systems and processes for monitoring stress in a wind turbine blade Wind turbine systems, monitoring systems, and processes for measuring stress in a wind turbine blade generally includes embedding and or disposing optical glass fibers on a surface of the wind turbine blade and monitoring light transmission through the optical glass... | 12/04/2007 |
| 7244106 | Process and device for flow control of an electrical motor fan A method and configuration from maintaining a constant of air to a protective helmet (4) from a fan (3) in a battery powered fresh air unit. The fan (3) is a radial fan with a filter (5) positioned on the suction side of the fan and is op... | 07/17/2007 |
| 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 |
| 7207778 | Rotor as well as rotary-wing aircraft with a rotor A rotor, especially for a rotary-wing aircraft, with a rotor mast and one or more adjustable rotor blades includes a rotor blade adjustment device without a swash plate and arranged on a carrier device that automatically rotates synchronously with the rotor blades, ... | 04/24/2007 |
| 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 |
| 7179054 | Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio... | 02/20/2007 |
| 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 |
| 7175390 | Switching apparatus with an actuating shaft A switching apparatus having an actuating shaft, an actuator, at least one switch and a housing. A switching apparatus is in the form of at least one actuating guide which is connected with a first actuating guide portion to the actuating shaft and which with a seco... | 02/13/2007 |
| 7159817 | Vertical take-off and landing (VTOL) aircraft with distributed thrust and control An aircraft having a vertical take-off and landing (VTOL) propulsion system. The aircraft includes a fuselage, the VTOL propulsion system, at least one forward thruster, a power source used for both the VTOL propulsion system and forward thruster, fore and aft wings... | 01/09/2007 |
| 7118336 | Pressurized oil supply for propeller engine system A system and method for providing pressurised oil during non-feathered in-flight shutdown conditions in a variable-pitch aircraft propeller engine. A secondary pump provides pressurised oil substantially independent of an engine main oil circuit. ... | 10/10/2006 |
| 7115158 | Fan having blade members that heat and cool and has an ionizing grid for air purification A ceiling fan that incorporates into its blades both a system for air purification by removing dust and other particulate pollutants from the air in a room through ionization of the air stream passing over an ionizer grid and also a system for heating and cooling th... | 10/03/2006 |
| 7101152 | Method for maximizing the energy output of a wind turbine A method is provided for controlling a wind turbine, and a wind turbine is provided with a control device for controlling a wind turbine. A method and a wind turbine are developed so that losses of yield, particularly as a result of variations in the conversion of t... | 09/05/2006 |
| 7072784 | System for monitoring wind power plants A system to acoustically monitor at least one wind power installation, wherein the wind power installation includes a plurality of components including at least rotor blades. The system may comprise a remote monitoring center and a first wind power installation. The... | 07/04/2006 |
| 6946751 | Wind power generation system A wind power generation system capable of outputting generated power at high efficiency with a smoothed output power includes a wind power generator and a laser aerovane mounted on the wind power generator or located near the wind power generator. Direction and velo... | 09/20/2005 |
| 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 |
| 6939103 | Wind power installation with multiple blade adjusting devices The present invention concerns a wind power installation having a rotor with at least one blade and an adjusting device for the rotor blade. An adjusting device with more than one drive for one rotor blade is provided. By virtue of that arrangement each drive only h... | 09/06/2005 |
| 6899519 | Method of detecting a change in the structure of a complex shape article A method of detecting the change in the structure of a turbine rotor uses the steps of injecting an ultrasonic signal into the turbine rotor at a first position using a first ultrasonic transducer to produce a diffuse field ultrasonic signal in the rotor; detecting ... | 05/31/2005 |
| 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 |
| 6783326 | Means for adjusting the rotor blade of a wind power plant rotor Two independent adjusting systems are recommended for each rotor blade (6) for blade angle adjustments of the rotor blades (6) of the rotor of a wind power plant, assuring full redundancy of the blade angle adjustment. By suitable control of the indivi... | 08/31/2004 |
| 6759758 | Wind turbines for electrical power generation Improvements to wind turbines for electrical power generation, incorporating a blade (4) rotor for harnessing the action of the wind, which consists of a hub (3) prolonged at the rear with an extension (7) that constitutes the assembly shaft for... | 07/06/2004 |
| 6705835 | Electric fan A fan provided with a smoke detector wired to a CPU in a switch to start the fan if smoke detected exceeds a certain level; and an ion generator is provided to generate ions to neutralize substances carrying hazardous cations; a first conductor on a screen holder wi... | 03/16/2004 |
| 6695588 | Damping of oscillations in wind turbines Damping of oscillations of the first bending mode of a wind turbine is performed means of one or more containers partly filled with a liquid for damping oscillations of the first natural bending frequency of the wind turbine. The damping means comprises a... | 02/24/2004 |
| 6619918 | Method of controlling the operation of a wind turbine and wind turbine for use in said method The wind turbine (1) comprises a rotor (2) with a number of blades mounted for rotation about a mainly horizontal axis, and the pitch of the blades of the wind turbine is controlled dependence on measured parameters to optimize the operation of the wind t... | 09/16/2003 |
| 6465901 | Device for using wind power or generating wind and pitch system for such a device A device for using power of a moving fluid or generating movement in a fluid such as a wind turbine is provided with radially placed blades and a pitch change system. The pitch change system comprises a central pitch change shaft and guide shafts, with a ... | 10/15/2002 |
| 6361275 | Wind energy installation A wind power installation is disclosed comprising a rotor having at least one rotor blade for converting the kinetic energy of the wind into mechanical energy, an adjusting device for individually adjusting at least one rotor blade, a generator for conver... | 03/26/2002 |
| 6210099 | Moving-weight, dynamic balancing apparatus for a rotary machine, in particular for industrial fans A moving-weight, dynamic balancing apparatus for a rotary machine, in particular an industrial fan, having a rotary shaft, and at least one rotor carried by the rotary shaft and provided with main rotor bearings to allow rotary movement thereof. The balan... | 04/03/2001 |
| 6190126 | Fan impeller assembly for cooling systems of internal combustion engines A fan impeller assembly of simple construction which is intended, in particular, for use in cooling systems of internal combustion engines and can be used there inter alia as a cleaning blower for clearing the radiator and/or corresponding air inlet openi... | 02/20/2001 |
| 6109871 | Integrated fan assembly with variable pitch blades A fan assembly (10) includes first and second housing sections (70, 72) which, when mated by a first set of fasteners, define a plurality of circumferentially spaced openings (162) that lead to an internal housing chamber (82). The fan assembly (10) also ... | 08/29/2000 |
| 6007298 | Optimum speed rotor A variable speed helicopter rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor and... | 12/28/1999 |
| 6004099 | Rotor blade connection The helicopter rotor blade connection has a support beam which connects the lift-generating wing section of the rotor blade with the rotor hub, and transmits centrifugal and lateral forces as well as bending and torsional moments. The connection is torsio... | 12/21/1999 |
| 5816533 | Method and device for reducing the vibration generated on the structure of a helicopter The present invention relates to a method and a device for reducing the vibration generated on the structure (14) of a helicopter (2) by the aerodynamic flow through the main rotor (3). According to the invention, said device (1) includes: at least one sensor ... | 10/06/1998 |
| 5810560 | Control system for non-linear control of a speed setting and a throttle valve in an aircraft engine A control system for an aircraft that controls the set speed of the propeller governor and the degree of opening of the throttle valve using a single control lever. The speed setting mechanism of the propeller governor is directly connected to the power l... | 09/22/1998 |
| 5655878 | Higher harmonic control apparatus for a helicopter rotor A control system has an HHC actuator having a basal portion and a movable portion. A load acting on the control system is detected by a semiconductor gauge. The load detected by the semiconductor gauge is compared with a threshold value in a computer. If ... | 08/12/1997 |
| 5597138 | Yaw control and stabilization system for helicopters A device for stabilizing yaw motion is provided for use on a helicopter having a main rotor rotatable about a main rotor axis, a power source, and a tail rotor boom with a longitudinal axis. The device includes a tail rotor and a gyroscopic mechanism. The... | 01/28/1997 |
