Abstract: An apparatus and method for reducing wind turbine damage includes a propeller having a plurality of blades projecting radially from a hub. The blades may be adjustably combined to form variable cross-sections that either increase or decrease propeller rotation speed dependent on wind speed and weather conditions.

Abstract: A turboprop having a set of variable-pitch rotary blades constrained to rotate with a rotary support. In order to vary its pitch, each blade of said set is coupled to a specific hydraulic actuator carried by the rotary support.

Abstract: A self-adjusting blade for wind turbine generator or windmill will change width of blades according to wind speed to optimize efficiency. The windmill comprises a brace, rib tubes, cylinders, cylinder holders, hose holders, non-movable shells, and movable shells. The movable shells and rib tubes are organized like extendable antennas of portable radios. The movable shells are moved and held by cylinders. There are sets of hose holder for hoses and wires for cylinders. A micro-controller controls cylinders to move the movable shells according wind speed.

Abstract: A rotor blade (1) with adaptive twisting, the blade being provided with an outer covering (2) extending along a pitch variation axis (AY) from a first end zone (3) to a second end zone (4), the outer covering (2) defining an internal cavity (8). The blade includes a strip (10) extending inside said cavity (8) along said pitch variation axis (AY), said strip (10) comprising a composite material that is anisotropic so as to be suitable for twisting under the effect of centrifugal forces (F) directed parallel to said pitch variation axis (AY) when the blade (1) is in rotation, said strip (10) being fastened to said outer covering (2) via first and second fastener means (11, 12) in order to be capable of twisting said outer covering (2).

Abstract: A rotor for a propulsive thrust device comprises a hub having a peripheral surface; a plurality of rotor blades received at the peripheral surface of the hub; a first bearing assembly located in the hub and around a shank of a respective rotor blade to support the rotor blade in the hub under centrifugal loading and to allow the rotor blade to rotate about a longitudinal axis; and a second bearing assembly located in the hub and around a shank of a respective rotor blade and inward of the first bearing assembly to preload the first bearing assembly. A preload bearing assembly comprises an outer race; a plurality of rolling elements located therein; and a plurality of studs located in communication with the outer race. Adjustment of the studs distributes a tensile load around the outer race to exert a preload force on a bearing assembly supporting the rotor blade.

Abstract: A Hydro-kinetically Powered Electrical Generator Power Head (HyPEG PH) is disclosed which converts unimpeded run-of-river, ocean and tidal flow currents into useful mechanical power on an infinitely variable scale. This innovative design can be used with other hydropower devices, especially those that are designed to remain completely submerged and require no additional permanent structures to be built on land (or in the water). This invention has no fast moving components and it has little to no ecological impact to the aquatic environment. This invention is designed to operate well below river traffic navigating on the surface and withstand foreign object damage due to debris floating under the surface. It is compliant to, and is designed to work with, other modular hydrokinetic power electrical generation systems that use vertical axis, horizontally rotating power heads from which they extract mechanical energy to convert to useful electrical energy.

Abstract: Provided is a wind power generating apparatus adopts a rotor blade including a frame body unit composed of a frame body having an opening and a plurality of support frames extending from the frame body, and a sail portion adhered to cover the frame body unit. The frame body unit is configured to be retractable using wires and a servo-motor to decrease the surface area of the rotor blade in high winds. As a result, the rotor blade can rotate easily with a low wind power and can rotate continuously with an inertial power, once it starts the rotations, so that it can run the power generating function at a set value of a rated speed of rotations of 700 to 2,000 rpm.

Abstract: An exchange of momentum wind turbine vane having a large area for exchange of momentum which is made rigid with buckleable wing columns capable of automatic self-feathering the vane to protect it from damaging high-speed wind. The large vane area provides very low windspeed startup. In the preferred embodiment the vane is plastic and very inexpensive to manufacture. Four embodiments are described and shown.

Abstract: A high-efficiency turbine generates energy from a fluid flow, such as wind or water currents. The turbine has a central axis with a plurality of foils rotatable about the central axis in a general paddlewheel arrangement. Each of the foils has a foil axis parallel to the length of the foil and the central axis, and is rotatable about its foil axis. During operation of the turbine, each foil assumes an attack angle to the direction of the fluid flow with the attack angle dynamically controlled about the foil axis as the foil rotates about the central axis so as to maximize the foil's moment about the central axis.

Abstract: A wind turbine includes a nacelle support structure rotationally mounted to a tower through a yaw bearing for rotation about a yaw axis. A hollow shaft is rotationally mounted to the nacelle support structure through a rotor bearing for rotation about a rotor axis of rotation and a blade support body is mounted to the hollow shaft, the blade support body supports either of a two-bladed rotor system and a three-bladed rotor system, the two-bladed rotor system and the three-bladed rotor system have essentially equal solidity.

Abstract: A variable blade pitch wind turbine and method of passively varying the blade pitch is presented. Each blade of the turbine rotor can individually and passively rotate about a respective blade axis to continuously vary the pitch of the blades to adjust to the ever changing wind speed and direction without active controls or other mechanical or electrical induced inputs to force rotational movement of the blades. Sections of each blade can respectively rotate to change the blade twist. In one example, a second rotor is used to increase the electrical generation and efficiency of the blade turbine.

Abstract: A blade pitch regulating hub (1) having a circular base (4) having a base gear (5) pivotally attached thereto. Blade stems (6) are placed equally apart from one another around the hub base. The blade stems have stem gears (7) that all engage the base gear so that all of the blade stems rotate at equal distances and in the same direction. The pitch of the blade stems and blades (8) are also controlled by the regulating means (2). A speed regulating gear (12) regulates the rotational power output from a wind driven power generator by using a telescoping housing (14) and conical gear (19) that extend and retract depending on wind speed. A guide means (20) ensures that a sliding gear assembly (26) always stays engaged with the conical gear as the diameter of the conical gear changes as it retracts and extends. An output gear assembly (28) engages the sliding gear assembly and transfers power from the sliding gear assembly to an output axle (29).

Abstract: A blade system and method of use for a wind turbine to produce electrical power. The system has a vertical rotor shaft coupled to an anchor pad and supports a horizontal blade arm. A blade assembly having a rotatable flap is coupled to the blade arm. The flap captures the wind which causes the rotor shaft to rotate and generates electrical power from an electrical generator.

Abstract: There is described a rotor for a helicopter, having a hub rotating about a first axis; a number of blades projecting from the hub in respective longitudinal directions lying in a plane crosswise to the first axis, and each connected to the hub so as to be movable at least about a second axis crosswise to the first axis and to the relative longitudinal direction; and a number of damping devices for damping vibration of the helicopter, each interposed between a respective blade and the hub; each damping device has a plate member fixed, on one side, to the hub, elastically connected, on the opposite side, to the relative blade, and flexible, during movement of the blade, about a third axis coaxial with the second axis.

Abstract: An apparatus for generating electrical power. The apparatus comprises a plurality of solar energy collectors for generating electricity from solar energy; a plurality of wind turbines for generating electricity from wind energy; a support structure having arms extending radially from a vertical shaft, the arms positioned at different vertical distances along the vertical shaft and the arms having different lengths; solar energy collectors and the wind turbines affixed to terminal ends of the arms; and the support structure comprising camouflage elements causing the support structure to resemble vegetation.

Abstract: A method and an assembly for fastening at least one screw nut to be tightened of a rotor blade bearing of a wind turbine are provided. A screw nut driver assembly is provided at a rotatable portion of the rotor blade bearing, the screw nut driver assembly being adapted to automatically tighten the at least one screw nut. The screw nut driver assembly is aligned with the screw nut to be tightened by rotating the rotatable portion with a pitch drive of the wind turbine. Then the screw nut is tightened using the screw nut driver assembly.

Abstract: A constant-velocity drive system for an aircraft rotor has a gimbal mechanism and a differential torque-combining mechanism. The gimbal mechanism has gimbals driven in rotation by a rotor mast about a mast axis, the gimbals providing for gimballing relative to the mast about gimbal axes generally perpendicular to the mast axis. The differential torque-combining mechanism is connected to the gimbal mechanism and configured to be driven in rotation about the mast axis by the gimbal mechanism. The differential mechanism is capable of gimballing relative to the mast about the gimbal axes, the differential torque-combining mechanism having an output component attached to a yoke of the rotor for driving the yoke in rotation with the differential torque-combining mechanism.

Abstract: A new improved compact wind power turbine with multiple turbine blades and an isolated arrow point stationary nose is presented. Turbine blades (rotors) are connected to a circular cage, and at the center of the turbine, the isolated arrow point stationary nose points forward. Each turbine blade has a 90 degree right angle fin connected to its tip for capturing the force of the wind that applies to the blade tip, which otherwise spills over, reducing wind force and creating turbulence at the tip. The captured wind at the blade tip increases the rotational force on the turbine blades creating a greater rotational force than on other market-available wind turbines. Preferentially, the turbine is directed into the wind either manually, or by using a tail vane or other means for orientating turbine into a wind. A generator or alternator converts the mechanical power into electricity for use at industrial, commercial or home sites.

Abstract: A renewable energy system for directly charging electric and hybrid vehicles is shown for areas with moderate wind and/or solar resources. The wind turbine blades and rotor assemblies for capturing the wind resources show significant improvements in both cost of manufacture and site assembly compared to three-bladed horizontal axis turbines. A simple, easily manufactured blade pivoting mechanism is shown to improve the performance of vertical axis turbines. A related improvement for varying blade pitch along the axis of horizontal axis turbine blades allows for production using continuous mass-production methods rather than the labor and cost intensive current practice of molding the blades. The blade assemblies are completely scalable and can be easily customized for particular applications/sites.

Abstract: Improvements in A wind generator, that may also be called and relates to, windmill, turbine or aero generator, on a vertical axis. The vertical axis gives the windmill the ability to be turned by air, or liquid if inverted, from any direction parallel to the earth's surface. Multiple blades rotate through a horizontal axis into the wind to lessen air resistance on one side while turning vertically on the other side to gain energy from the wind. The system is counter-weighted as needed, to reduce energy loss, by different methods including but not limited to gears, levers, pneumatics, cables, hydraulics or added counter-weight. The electrical generating machinery is below the blades or at the bottom of the vertical drive shaft.

Abstract: A design for a scalable advanced design vertical shaft wind turbine power generator which incorporates a superior symmetrical blade configuration and a unique blade mounting approach which utilizes aerodynamic forces to provide wide changes in blade positions o optimize efficiency and eliminates the need for expensive mechanical control devices while minimizing manufacturing, operational and maintenance costs.

Abstract: A generator with arms forming the shape of a star and with each of them having an articulated blade capable of being fixed to the arm and being fastened temporarily to it by means of a voidable retaining element, which is moveable between a retaining position and a released position of the corresponding blade.

Abstract: The present invention relates to a vertical axis turbine 1 apparatus for converting movement of a fluid into electrical power and a method of manufacture of a turbine. The turbine can be installed on a flexible line 2, such as a cable, rope or stay. It could be used on the stay of a yacht. The main rotor 13, 14 of the turbine has least two helical blades arranged about the longitudinal axis with rotational symmetry, the blades being substantially identical in shape and having a lift-producing cross-sectional shape at least along a part of their longitudinal length. A generator 22 coupled to the main rotor 13, 14 and is contained in a generator housing 23.

Abstract: This invention is a device for transforming the energy of flowing water into useable energy. At a minimum, the device comprises one or more flow diversion structures, one or more paddle wheels, and one or more generators. A gearbox or transmission may be added to increase the rotational speed of the generators. A subsea cable may be included to transmit the electrical energy produced to shore. Other elements may be added as described by the claims of this patent application.

Abstract: A fixed horizontal axis-mounted wind turbine blade impelled by an independently rotating, pressure cambered fin includes a wind turbine blade comprised of a solid, rigid leading edge and trailing edges. The blade is triangular in shape, the base of the triangular blade is attached to a center, longitudinally fixed, horizontal, primary rotating axis and the point opposite the base is most distant from the horizontal rotating axis. The wind turbine blade base and length are aligned mutually perpendicular to the primary horizontal axis of rotation. A triangular fin is attached to the trailing edge of the blade end most distant from the base. The base of the attached fin is coincident to a secondary axis of rotation. The secondary axis of rotation allows the fin to rotate past either side of the plane of primary blade revolution in response to wind pressure.

Abstract: A self-adjusting blade for wind turbine generator or windmill will change width of blades according to wind speed to optimize efficiency. The windmill comprises a brace, rib tubes, cylinders, cylinder holders, hose holders, non-movable shells, and movable shells. The movable shells and rib tubes are organized like extendable antennas of portable radios. The movable shells are moved and held by cylinders. There are sets of hose holder for hoses and wires for cylinders. A micro-controller controls cylinders to move the movable shells according wind speed.

Abstract: A wind turbine pitch control system is disclosed that provides a pulsed torque to the blade pitch actuator if continuous torque fails to adjust the blade pitch angle to a commanded pitch angle. This invention provides a cost-effective way to increase peak torque capability for existing wind turbines that have problems, under certain operating conditions, moving blades per the control command.

Abstract: A fan includes an impeller and a fan frame. The impeller is accommodated within the fan frame. The impeller has a hub and a plurality of blades disposed around the hub. The hub has a top portion and a side wall connected with the top portion. The hub further has a plurality of flexible portions disposed and located on the side wall. The blades are connected with the flexible portions, respectively, so that the blades are connected to the hub.

Abstract: A wind power plant comprising blades connected by a rods, which are fastened, to cantilevers set on a fixed axis with bearings. Each blade is connected to adjacent blades with a stem. The stem is connected to the blade at one end, the other end is connected to the rod of the adjacent blade. The rod of one blade is attached with weights. In different variations of the wind power plant the blades are fastened to the cantilevers, the internal and external edges of each blade at the butt ends are interconnected by a stem, wherein one end of the stem is connected to the rod near the external edge, while the other end is connected to the adjacent blade between the rod center and the internal edge thereof or to the adjacent blade between the center and the internal edge.

Abstract: A pair of airfoil blades having a longitudinal axis coincident with one another. Each blade is bent at the center on the plane of the chord. Each blade has an airfoil tip blade placed at the outer most trailing edge. The blades are affixed by their root ends to opposite ends of a torsion shaft. The blade chords are offset from one another, which defines a blade pitch angle. The torsion shaft is journaled perpendicular through a driveshaft, whereas the rotation of the blades can transfer through the torsion shaft to the driveshaft and cause the driveshaft to turn, eliminating the need for a hub. The blades are adapted to pivot along with the torsion shaft. The blades lie in substantially the same plane, and are adapted for rotation in a plane orthogonal to the longitudinal axis of the driveshaft. Each blade has an airfoil shaped fluid gate valve disposed on the leading edge.

Abstract: The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a first drive system for adjusting a pitch angle of the first rotor blade, wherein the drive system is adapted to transform rotational energy of the rotor blade rotating about its longitudinal axis into another form of energy such that a counter torque against the rotating direction is induced.

Abstract: The present invention relates to a submersible plant for producing energy. The submersible plant comprises at least one turbine (9) and is characterized in that said turbine (9) is mounted on a stream-driven vehicle (3) and in that said stream-driven vehicle is secured in a structure by means of at least one wire (6).

Abstract: The problems of return and continuous motion are common to a number of renewable energy machines, particularly in applications with wind and magnetism. Devices are presented for obtaining wind and other energy through the use of sails and other components with flexible structures on a rigid frame that require a return motion. Other devices presented enable the capture of linear energy, such as that of wind, with or without return motion, or at least minimizing such motion, with or without the use of blades.

Abstract: The invention relates to a bearing unit for a long rotor blade, especially a wind power installation, said bearing unit comprising two annular elements that can be rotated in relation to each other and are directly or indirectly connected to the rotor blade hub and to the rotor blade, and at least two running tracks that can be axially staggered in relation to each other and comprise peripheral rolling bodies with an approximately cylindrical shape, i.e. each comprising a lateral surface that is rotationally symmetrical to a rotational axis in a very precise manner. The aim of the invention is to be able to fully absorb the tipping moment caused by the wind pressure on the rotor blade and on the bearing unit, and optionally to absorb other forces and other moments.

Abstract: A rotor blade comprises an inner rotor blade root area, a rotor blade main area disposed adjacent to the inner rotor blade root area along a length of the rotor blade and having an aerodynamically effective rotor blade profile, the profile including a nose area and a rear edge area, and a rotor blade tip disposed adjacent to the rotor blade main area along the length of the rotor blade. The rotor blade tip is configured to be deformable relative to the rotor blade main area and is operatively connected to a first actuator device. The first actuator device is configured to initiate a vertical movement of the rotor blade tip upwards or downwards relative to the lift direction. The vertical movement starts from a neutral position relative to the rotor blade main area.

Abstract: A rotor assembly for a wind turbine including at least one blade adapted to automatically adjust its shape as a function of rotational speed to create an efficient fluid dynamic profile over a wide range of wind conditions and rotational speeds. The rotor assembly includes at least one blade configured to respond to rotation induced forces to automatically bend in a manner to optimize its wind profile.

Abstract: A vertical axis wind turbine having a plurality of upright airfoils pivotally engaged. A continuous adjustment of the angle of attack of the airfoils to oncoming wind is provided by rotation of a control plate connected to the vanes which are mounted upon a rotating drive plate. A vane can be employed to rotate the control plate to affect the continuous adjustment of the airfoils.

Abstract: A linear wind powered electric generator (LWPEG), which is particularly adapted for installation at geographical sites subject to lower wind intensities. More specifically, there are provided design concepts for an LWPEG, possessing reasonable economic parameters for utilization at the lower-intensity wind sites. Moreover, the linear wind powered electric generator is based on a track based wind power generator, incorporating aerodynamic designs, which are adapted to reduce mechanical complexities presently encountered in this technology, while being cost-effective both in construction and in connection with the operation thereof.

Abstract: Comprising a tower (1) and a set of vertical blades (4) which rotate around the tower (1) and which in turn rotate about themselves on a shaft (5) in order to face the direction of the wind (6) during the angular displacement that favours the rotation of the blades (4) around the tower (1) and in order to locate them parallel to the direction of the wind (6) during the rest of the angular displacement, reducing the braking of the blades when passing from their position parallel to the wind direction to the position facing it. The blades (4) comprise means (11-13) of suppression of the surface of the blade when it passes from the parallel position to the position facing the direction of the wind (6), minimising the braking which the blade produces during the change of said position. It permits maximum efficiency to be obtained with both weak and strong winds.

Abstract: An apparatus for capturing kinetic energy from wind and water current speeds is disclosed for use in both commercial and residential applications generally comprising a vertical axis spindle, a plurality of structural arms attached to said spindle, and a plurality of panels rotationally attached to the ends of their respective structural arms to provide for controlled flipping action, thereby enabling operation in diverse intensity wind and water currents. In further embodiments, the apparatus may comprise mechanical, pneumatic or hydraulic mechanisms for dampening the contact points between the panels and the hinge assemblies as the panels reach their open positions at the certain angle to their respective structural arms, and between the panels and their respective structural arms as the panels rotate to their folded position parallel to the structural arms.

Abstract: The Wind Drum is a cylinder shaped wind utilization machine primarily used for electricity generation. Instead of a solid wall attaching the top and bottom circular plates are eight rods spaced equally around the circumference of the top and bottom circular plates. Now you have a drum shape you can see through from the elongated side. Attached to these rods are boards, or flat rectangular pieces, which make-up the vanes of the Wind Drum. Through mechanical manipulation of the angles of the eight vanes compared to the center, or pivotal spot, of the top and bottom circular plates the vanes are positioned so as to be pushed by wind energy, directing wind energy into other vanes of the Wind Drum, or to become neutral to wind energy allowing minimal resistance to wind energy. These changes of the wind vane angles allows for maximum efficiency in converting wind energy into mechanical energy.

Abstract: A wind driven generator includes a rotor disposed in a cylindrical duct and supported by a frame for rotation in response to wind flowing through the duct. The rotor includes plural circumferentially spaced paralleled rotor blades supported for rotation about a generally horizontal axis. Each blade is supported for pivotal movement to change blade pitch, angle of attack or camber as the rotor rotates. A pitch or camber control motor, self-governing wind vane mechanism, or governing mechanism is operable to move a circular cam to vary blade pitch or camber to control rotor speed. The duct is mounted on a mast having a base supported on a foundation for pivotal movement to face the wind for maximizing air flow through the duct. Electric power generators are connected to opposite ends of the rotor at respective power output or drive shafts.

Abstract: A system and method of reducing back flow in an air mover having one or more blades is described. A flap is attached to a blade of the air mover such that, when back flow occurs, the flap obscures all or a portion of the space between blades during back flow.

Abstract: The invention relates to a wind turbine including at least two pitch controlled wind turbine blades. Each blade has pitch bearings including two or more bearing rings, and pitch controlling means for pitching the blades by means of the bearings. The blades are mounted on a hubs via the pitch bearings and the pitch bearings include separate flexibility enhancing means for controlling loads in the bearings.

Abstract: The invention relates to a wind turbine including at least two blade units. Each blade unit has a pitch controlled wind turbine blade and at least one pitch bearing including at least one outer ring, at least one centre ring and at least one inner ring. The wind turbine further includes a hub comprising a mount area for each of the blade units (31). The mount area comprises at least two concentric load transferring surfaces for attaching the blade unit, via the at least one pitch bearing. The invention further relates a hub and a use hereof.

Abstract: A power generating turbine is disclosed having a vertical axis, a generator connected to the vertical axis, and coupled blades connected to the vertical axis. The coupled blades are a horizontal axis; one or more blades, comprising a first set of blades, attached near one end of the horizontal axis; and one or more blades, comprising a second set of blades, attached near the opposing end of the horizontal axis wherein the broad sides of the second set of blades are orthogonal to the broad sides of the first set of blades, the broad sides of the blades are parallel to the horizontal axis, and the blades pivot on a vertical path. The middle portion of the horizontal axis is pivotably connected to the vertical axis. Solar cells can be attached to various parts of a turbine for generating power.

Abstract: A high-efficiency turbine generates energy from a fluid flow, such as wind or water currents. The turbine has a central axis with a plurality of foils rotatable about the central axis in a general paddlewheel arrangement. Each of the foils has a foil axis parallel to the length of the foil and the central axis, and is rotatable about its foil axis. During operation of the turbine, each foil assumes an attack angle to the direction of the fluid flow with the attack angle dynamically controlled about the foil axis as the foil rotates about the central axis so as to maximize the foil's moment about the central axis.

Abstract: A method facilitates lubrication of components. The method includes coupling a blade to a pitch control mechanism such that a bearing is positioned between the blade and the pitch control mechanism. The method further includes coupling a control system to the pitch control mechanism and configuring the control system to control the blade pitch mechanism for controlling movement of the blade and rotate the blade from a first position to a second position when a predetermined amount of time has elapsed.

Abstract: A composite blade (26) comprises a root portion (36) and an aerofoil portion (38). The aerofoil portion (38) has a tip (42), a chord (C), a leading edge (44), a trailing edge (46), a suction surface (48) extending from the leading edge (44) to the trailing edge (46) and a pressure surface extending from the leading edge (44) to the trailing edge (46). The composite blade (26) comprises reinforcing fibres (52) in a matrix material (54). The aerofoil portion (38) adjacent the root portion (36) has regions (56, 58) at least at the leading edge (44) and trailing edge (46) comprising an asymmetric lay up of reinforcing fibres (52) and the aerofoil portion (38) adjacent the tip (42) having at least a region (62) at the mid-chord comprising an asymmetric lay up of reinforcing fibres (52).

Abstract: A bearingless rotor system includes a flexbeam assembly having a first beam and a second beam arranged in a back-to-back orientation with a pitch shaft channeled therebetween. The beams morph into a rotor blade spar at an outboard rotor blade station. The outboard section of the flexbeam assembly receives the full pitch input from the pitch shaft while the most inboard section of the flexbeam assembly is essentially fixed in pitch by a blade attachment to a rotor hub assembly. The flexbeam assembly twist versus span is essentially linear from the most inboard to the most outboard rotor blade stations. The outboard rotor blade station, being attached to the outboard section of the flexbeam assembly, thereby also defines the pitch input equivalent from the outboard rotor blade station to the rotor blade tip.