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7581926 |
Servo-controlled extender mechanism for extendable rotor blades for power generating wind and ocean current turbines
A power generating system wherein a turbine is mounted on top of a tower or tethered underwater. The turbine includes a rotor having a main blade connected to a rotor hub and an extender section....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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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.
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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...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4500257 |
Wind turbine spoiler
An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support...
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4490093 |
Windpower system
A windpower system includes a support and a turbine having a shaft rotatively mounted to the support. The turbine has variable pitch blades whose pitch is controlled by the differential motion of a...
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4486143 |
Turbine-type wind machine
A wind machine which includes turbine assemblies arranged in superposed relationship and wherein the turbine assemblies may vary in size and number in accordance with power requirements, together...
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4464579 |
Derrieus wind turbine electric generating system
A wind electric system intended to provide power to a power grid, for use with a wind turbine which has no starting torque. The generator is one which can function as a motor as well. When the wind...
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4449053 |
Vertical axis wind turbine
A Darrieus-type vertical axis wind turbine is disclosed which includes a vertically extending rotor tube mounted on a support structure with two or three rotor blades of troposkein configuration on...
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4443155 |
Wind rotor thrust-actuated brake
A new type of overspeed control system for a rotor driven by wind or some other fluid flow. The rotor support is mounted so that it can move back some small distance along the direction of the...
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4376614 |
Propeller brake for a turbo-prop engine
A propeller brake for a twin spool turbo-prop engine which permits the propeller to be locked in a stationary position with the engine running is disclosed. The propeller brake has a hydraulically...
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4372732 |
Control mechanism for a windmill
A method and apparatus are provided for controlling the maximum power of a hydraulic windmill which is achieved by utilizing the overpressure created in a closed loop hydraulic energy conversion...
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4368692 |
Wind turbine
A wind turbine to convert wind energy into hydraulic energy by a positive displacement hydraulic pump driven by a wind mill. To the oil outlet of the hydraulic pump, a thermo-sensitive control...
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4366386 |
Magnus air turbine system
A Magnus effect windmill for generating electrical power is disclosed. A large nacelle-hub mounted pivotally (in Azimuth) atop a support tower carries, in the example disclosed, three elongated...
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4321005 |
Modular windmill installation
A windmill installation adapted to extract energy from natural wind currents is disclosed wherein a plurality of individual wind wheel modules are stacked vertically in a tower-like structure and...
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4302156 |
Electro-viscous fan clutch assembly
Electro-viscous fan clutch having an electromagnet carried by a rotatable pump plate within the confines of the clutch housing. The electromagnet controls a spring arm valve element which is...
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4276816 |
Wind propelled fan
An interior ceiling type fan operated by a wind propelled squirrel cage rotor, rotatably mounted atop the roof of a structure, with an axially extending drive shaft therefrom extending downwardly...
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4276481 |
Fluid velocity actuated structure for a wind mill/water wheel
A fluid velocity actuated structure for a wind mill/water wheel, comprising an elongated cylinder with blades/fins hingedly supported thereon. When exposed to the driving force the one blade/fin...
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4227861 |
Cooling fan with viscous-magnetic fan clutch
Engine cooling fan with viscous-magnetic clutch which is electrically energized on closure of thermal switch mounted within engine coolant. As fan coil housing is driven on engagement of the...
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4062433 |
Quick release centrifugal clutch construction
A quick release centrifugal clutch construction having a driven member rotatably mounted on a shaft and a drive member rotatable with the shaft and axially engageable with the driven member. The...
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3893555 |
Rotary fans
A variable speed thermostatically controlled cooling fan for an internal combustion motor, especially for an automobile. Within the fan hub is incorporated a viscous slipping clutch including an...
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3891347 |
Clutch-controlled, wind-operated, power producing propeller
A clutch-controlled, wind-operated, multibladed power producing propeller includes a plurality of propeller blades mounted on a hub for rotation about a power output shaft, a clutch connected...
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3805723 |
SAFETY CUT-OFF FOR PROPELLERS
A device to impact on an obstruction and stop a propeller before its moving lades can impact thereon. The device has extensions beyond the path of the propeller blades which extensions are attached...
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3722641 |
NO-BACK ACTUATOR SYSTEM
A bidirectional no-back such as a sprag clutch or no-back spring for locking the rotary member of a screw type actuator for restraining its movement in either direction is loaded out of engagement...
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