Abstract: A bladeless fan assembly for creating an air current includes a nozzle mounted on a base housing a device for creating an air flow through the nozzle. The nozzle includes an interior passage for receiving the air flow from the base and a mouth through which the air flow is emitted. The nozzle extends about an axis to define an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth. The nozzle includes a surface over which the mouth is arranged to direct the air flow. The surface has a diffuser portion tapering away from the axis, and a guide portion downstream from the diffuser portion and angled thereto.

Abstract: A wind turbine includes a quartet of pivot shafts that are in paired parallel relationship and transversely mounted on a central drive shaft, each pivot shaft supports a pair of wings at opposed ends thereof, the wings offset by 90°. Each pivot shaft rotates cyclically through 90° to move each wing from a wind-engaging orientation (drive position) in which the wing presents a flat surface approximately transverse to the incident wind, to a minimum drag position (glide position). In addition, the two wings of each pair on a shaft are disposed in planes that are offset by approximately 90° about their pivot shaft, so that one is in the drive position while the other is in the glide position. The wings of each pair of pivot shafts have wings at the ends thereof that open into the drive position at the same time and rotational angle of the turbine. A backstop at the site of each drive position supports the wind load and transfers its force to the central drive shaft.

Abstract: An embodiment of Vertical Axis Wind Turbine (VAWT) concept with vanes coupled to central shaft thorough supports that are connected in such a way that vanes can be moved closer or further away from the central shaft of the wind turbine. The rotational speed of the wind turbine can be regulated by adjusting the distance of the vanes. Additionally, the turbine can be put into storm protection mode by bringing the vanes right next to the central shaft where the profile of the wind turbine is reduced to minimum.

Abstract: A device for utilizing the kinetic energy of flowing water with several pressure surfaces rotating around a common rotor axis. The pressure surfaces can be pivoted around axes arranged parallel to and spaced from the rotor axis, in particular for the production of energy from tidal currents of the sea. The pressure surfaces are attached to the pivot axes in a pendulum-like manner and stop elements for the pressure surfaces are arranged in the radial planes between the pivot axes and the rotor axis. The pivot axes of the pressure surfaces are attached by their ends to support disks radially directed towards the rotor axis. The support disks are located at the ends of the rotor axis. The support disks are embodied in at least a double-walled manner. Alternatively or additionally each pressure surface is embodied at least in a double-walled manner.

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: A wind turbine with a vertical axle supporting a plurality of frame assemblies is mounted to the axle in spaced apart radial positions wherein each of the frame assemblies has a vertically oriented flat screen fixed between a pair of spaced apart struts, a stationary or rotating arm is vertically oriented and mounted between the struts and to one side of the screen, and a flexible sheet is fixedly mounted along one of its edges to the stationary arm. With a wind blowing in any direction, at least one of the flexible sheets is positioned for being blown against one of the flat screens, thereby driving the axle in rotation, and at least one of the flexible sheets is positioned for being blown away from one of the flat screens thereby lowering wind resistance.

Abstract: A method and related apparatus to control pitch angle of the blade of any horizontal axis wind turbines (wind generators or wind mills), which employs only the centrifugal force of the blade assembly including the blades and the moving parts of the patented apparatus. The pitch control is automatic when the rotational speed of the turbine rotor reaches certain pre-set value, the blade pitch angle is increased by the centrifugal forces of the blade assembly, thus the apparatus restricts the maximum rotating speed of the turbine rotor, and protects the wind turbine from being destructed by excessive wind speed, yet the wind turbine will keep running and producing power at the excessive wind speed. Due to the simplicity and low cost, this method and related apparatus are more suitable for medium and small wind generators (e.g., power <10 KW), where the conventional hydraulic or electrical power-actuated pitch control apparatuses are too complicate and too costly to be installed.

Abstract: A fluid turbine comprising a rotor, having an axis of rotation, comprising at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. The fluid turbine comprises a mechanism operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade between various pitch angles as the blade moves radially about the axis of rotation of the rotor.

Abstract: A fluid turbine comprising a blade pitch control mechanism comprising a cam and at least one rocker assembly, each rocker assembly comprising a rocker arm operable to pivot about an axis of rotation, the blade pitch control mechanism being operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.

Abstract: One aspect of the present invention relates to a vertical axis wind turbine. In one embodiment, the vertical axis wind turbine comprises a rotor comprising a vertical oriented shaft, and a plurality of vertical oriented blades angle-equally and radially secured to the vertical aligned shaft. Each of the plurality of vertical oriented blades has a face side, a back side, at least one window and at least one pane pivotally mounted onto the at least one window on the face side such that the at least one pane is rotatable between a closed position and an opening position around a pivotal axis responsive to a wind condition thereof. The pivotal axis is substantially perpendicular to the vertical oriented shaft.

Abstract: The invention provides a system for producing electricity from the channel, river, ocean or tidal water currents and wind. Each system module contains a vertical axis fluid driven turbine positioned in a protecting housing. The turbine employs a plurality of rotating paddles with mutually perpendicularly oriented asymmetric blades that are non-rotatably fixed by their leading edges to the poles at both ends. The high efficiency of the turbine comes from creating maximum drug force by vertically oriented blades on the power generating side and practically zero frictional force produced by blades on the resting side of the turbine.

Abstract: The present invention relates in general to the field of rotor designs using blades with a specific freedom to rotate in order to produce maximum resistance when encountering water flow in one direction, and either minimum resistance, when encountering water flow in the opposite direction. It aims at utilizing the currents of oceans and seas and rivers to generate electricity. Its design makes it possible to realize a rotor diameter much larger than existing devices for vertical axis rotors, and by this it will introduce leverage as a main characteristic for harnessing the power of relatively slow river and ocean currents by vertical axis rotors.

Abstract: A support for a wind turbine having rear frame extending from a bedplate, where the support includes at least one tension member extending between the rear frame and the bedplate.

Abstract: A wind turbine having a set of curved blades mounted on a central rotatable hub. Each of the blades has a defined pitch angle, to a rotational axis of the hub, along the blade from the hub to the tip. A curve is provided on the wind contact surface along each of the blades over the blade surface from the leading edge of the blade to the trailing edge of the blade by an amount between about 6 and about 24 degrees. The defined pitch angle from any point along the leading edge of the blade being defined by the are-sine of a ratio of blade velocity to apparent wind velocity, with a variance of ±30 percent of the complementary angle to the arc-sine; and apparatus for varying the velocity of the blade to control power output so that it is within fifteen percent of maximum obtainable power of the blade most distant from the hub.

Abstract: A vertical axis wind turbine according to embodiments of the present invention includes a hub, first and second rotor arms rigidly coupled to the hub, a first rotor blade pivotably coupled to the first rotor arm at a first hinge joint, a second rotor blade pivotably coupled to the second rotor arm at a second hinge joint, such that the first hinge joint is the only point of contact between the first rotor blade and any other part of the vertical axis wind turbine, and the second hinge joint is the only point of contact between the second rotor blade and any other part of the vertical axis wind turbine.

Abstract: A vertical axis wind machine having a mechanism of apertures and flaps to reduce return blade wind drag. The aperture and flap vertical axis wind machine has improved rotational speed and torque in relation to existing vertical axis wind machines. The aperture and flap vertical axis wind machine is also quieter, has fewer moving parts, requires no feathering controls to operate in high wind speeds, and can be operated independent of wind direction.

Abstract: The Mechanical Rotor is a simple unique invention that salvages torque energy from excess linear kinetic energy produced by flowing rivers, streams, ocean currents, or blowing wind. The unique design of the invention salvages torque by the drag principal of Physics during part of a rotation. Rotation completion limits exposure to only a small aerodynamic surface into the pressure of the linear kinetic force. The invention can be elongated, stacked, or clustered, and scalable, to accommodate any engineering design desired for using the salvaged torque to pump liquids, compress pneumatics, or generate electricity or any other useful purposes.

Abstract: An object is to provide a cylinder driving device of a wind-power generation system capable of appropriately controlling a pitch angle of each rotor blade at a time of power failure with a simple configuration. The present invention achieves the object by including a piston connected to the rotor blade; a cylinder that moves the piston by a hydraulic pressure; an urging member that urges the piston in one direction; an accumulator that is connected to the cylinder, and supplies hydraulic oil urging the piston in an opposite direction to a direction where the piston is urged by the urging member to the cylinder; and an on/off valve that controls opening or closing of a channel between the accumulator and the cylinder.

Abstract: A wind turbine for generating electricity has been developed. The turbine includes a housing for securement to a support. A wheel is mounted within the housing and is rotatable about a horizontal axis. The wheel has an axle assembly and a number of blade assemblies affixed thereto. Each of the blade assemblies has a frame with a spaced-apart pair of uprights and a crosspiece connecting the uprights. Each of the blade assemblies also having a pair of movable blades positioned within the frame with each of the blades being hingedly fastened to a respective one of the uprights. A brake actuator assembly is associated with each of the blades for relieving pressure imparted by strong winds on the blades. A brake operator assembly, disposed principally within said axle assembly, synchronizes the movement of the blades. An electrical current generator is connected to the wheel so as to be powered thereby.

Abstract: A system and method provide a proactive mechanism to control pitching of the blades of a wind turbine to compensate for rotor imbalance during normal operation by pitching the blades individually or asymmetrically, based on turbulent wind gust measurements in front of the rotor, determined before it reaches the rotor blades.

Abstract: The lifetime of plural shock absorbing resilient inserts of an adjustable pitch propeller with feathering blades may be increased. According to an embodiment, stops are implemented between metal surfaces that may be reached only in the event of shocks of great violence and following a certain elastic deformation of the shock absorbing inserts, which remain partially compressed. At the bottom of each circular cavity housing a respective annular insert of elastomer of the flange of a first cylindrical sleeve directly keyed on the drive shaft of the propeller a hole coaxial and of greater diameter than the diameter of a central hole of the annular insert and of the relative engaging pin is formed. Pins projecting from the face of the terminal flange of a second circular sleeve extend through the coaxially formed holes at the bottom of the respective circular cavities of the flange of the first sleeve.

Abstract: A windmill converting wind forces into rotational energy that can be used to drive a generator or other apparatus requiring rotational energy to work. The windmill includes panels for capturing the wind arranged around a vertically rotating shaft. The panels are able to move from a vertical position when receiving the force of the wind to a horizontal position when rotated to the upwind side of the rotation, thus minimizing their aerodynamic resistance. The panels can also be moved toward or away from the vertical shaft and the area of the panels can be changed so as to maintain a constant speed of rotation of the vertical shaft.

Abstract: A high efficient compounded wind power system comprises a wind power unit including a wind hood, a plurality of fan blades installed externally to said wind hood, a wind power unit driving main transmission shaft installed behind said wind hood, a driving gear installed on said main transmission shaft to form a separation with said wind hood, and a compound unit installed on said main transmission shaft locating behind said wind hood for mutual driving and mutual power transmission with said wind power unit to include a gravity wheel, a plurality of gravity shaft arms installed externally to said gravity wheel, and a plurality of swingable gravity wheels which are connected respectively with each gravity shaft arm at the end whereof. As such, high efficient wind power is produced to allow the present wind power generation equipments to operate eternally and continuously with a better energy economic effectiveness.

Abstract: A wind turbine and system related to the control of wind turbines. The wind turbine device is comprised of a plurality of blades arranged for rotation about an axis. During use the blades are moveable between different incline positions relative to a plane substantially normal to the axis. The control system allows for the detection of the rotational speed of the blades about the axis and for selectively resisting movement of the blades to a different incline position based on a comparison of the rotational speed with a target speed value determined by the energy output level for the turbine.

Abstract: Four wide frames are fixed to a vertical axis. The frames have horizontal bars ten centimeters apart. On each horizontal bar, a sheet of cloth twenty centimeters high and as wide as the frame is hung such that the sheets of cloth are all on the same side of the frames so that when the wind blows from any direction, the windmill rotates in the same direction. For frames facing the wind direction, on one side of the axis, the wind will blow the sheets of cloth away from the frame, and the wind will pass through the frame. On the other side of the axis, the wind will blow the sheets of cloth, but the horizontal bars will stop them from blowing to the other side of the frame such that the sheets of cloth stick to the frame and prevent the wind from passing through. The frame on that other side will act like a big sail.

Abstract: A wind driven energy source is providing utilizing a turbine wheel comprising a peripheral rim attached to a central hub via a series of spokes. A plurality of airfoil blades are assembled to the wheel, each blade being secured to a pair of spokes and positioned proximate an interior edge of the rim and extend only partially down the length of the spoke. This provides a central opening allowing airflow through the innermost region of the wheel. The blades are pivotally assembled to the spokes and can include an incident angle adjusting mechanism as well as a breakaway feature.

Abstract: A windmill rotor for horizontally rotating windmill for efficiently generating electricity is provided. The windmill rotor according to current application is comprised of a vertical axis rotor, which is comprised of an armature and two concaved wings which are attached at each end of the armature. Pluralities of long slits are developed perpendicularly to the armature on the outer surface of each wing. On each slit, one blade is attached to one long side of the slit with a hinge and a ribbon spring to enable the blade flapping, inwardly of the wing, according to the wind. The armature includes an elongated slot at the center to enable the armature shift back and forth longitudinally for a greater efficiency.

Abstract: A vertical axis wind turbine comprising: a rotatable vertical shaft; a first horizontal shaft rotatably attached to the vertical shaft, and extending on either side of the vertical shaft, the first horizontal shaft having a first side on one side of the vertical shaft, and having a second side on an opposite side of the vertical shaft; a first wind turbine blade fixedly attached to the first horizontal shaft on the first side, the first wind turbine extending in a generally perpendicular direction from the first horizontal shaft; a second wind turbine blade fixedly attached to the first horizontal shaft on the second side, the second wind turbine blade extending in a generally perpendicular direction from the first horizontal shaft, the second wind turbine blade fixed at an operational angle with respect to the first wind turbine blade; a first motion limiting means attached to the vertical shaft, and adjacent to the first side of the of the first horizontal shaft, where the first motion limiting means extend

Abstract: A propeller blade pitch control system includes a propeller hub for mounting at least one propeller blade, and a propeller shaft which rotates about an axis to rotationally drive the propeller hub. A pitch change yoke located within the propeller hub is configured to change a pitch of the at least one propeller blade in response to hydraulic fluid flow to a pitch change actuator. A propeller gearbox includes a first, rear end and a second, forward end located between the first, rear end and the pitch change yoke, and is configured to apply torque to the propeller hub. A hydraulic transfer bearing located between the first, rear end and the second, forward end of the propeller gearbox is operable to selectively permit a flow of hydraulic fluid from at least one hydraulic flow controller to the pitch change actuator.

Abstract: An accelerator for a wind power electrical generating system which mounts at least one wind turbine and which defines an air passageway capturing and delivering wind to the turbine. The accelerator comprises a cage-like support structure of thin sturdy members which defines in three-dimensional outline the air passageway. A cover which is mounted on and about the support structure in a floating relationship therewith may be injection-molded or thermo formed plastic. Connecting members between accelerators are provide with labyrinth seals.

Abstract: A vertical axis wind machine having a mechanism of apertures and flaps to reduce return blade wind drag. The aperture and flap vertical axis wind machine has improved rotational speed and torque in relation to existing vertical axis wind machines. The aperture and flap vertical axis wind machine is also quieter, has fewer moving parts, requires no feathering controls to operate in high wind speeds, and can be operated independent of wind direction.

Abstract: A vertical axis windmill includes a generator, a shaft mounted to the generator; and a plurality of blade sets. The blade set includes a blade rod rotatably connected to the shaft and carrying blades arranged on opposite sides of the shaft. Each blade is divided into first and second moment-inducing sections located on opposite sides of the blade rod. The first moment-inducing section is greater in area than the second moment-inducing section. Each blade is provided, at a predetermined location thereof, with a winglet. Stops for limiting swiveling of the blade are arranged on the blade set. When the blade set is moved so that the blades thereof are located in a windward position and a leeward position respectively, the blades are automatically and easily set at an optimum pressure-receiving condition and a least wind-resistance condition respectively, for receiving wind energy from variable directions.

Abstract: Tidal forces used for generation of electrical power has long been a solution to a recognized need. A really practical device to convert the energy of the fluid flow through tidal inlets into electrical power is the subject of this invention.

Abstract: In a preferred embodiment, pairs of oscillating wind paddles are mounted in the lee of a wind turbine of the lift type. An oscillating wind paddle assembly has an upper pair of paddles moving between a first position at substantially right angles to the direction of wind and a second position substantially parallel to the direction of the wind and mounted on arms extending to either side of a shaft to which they are connected through a one-way clutch, and a lower pair of paddles moving between a position at substantially right angles to the direction of the wind and a second position substantially parallel to the direction of the wind and mounted on arms extending to either side of the same shaft to which they are connected through a one-way clutch, one of the paddles being a drive paddle and the other a recovery paddle, the two pairs of paddles being out of phase with respect to one another.

Abstract: On a vertical axis we fix four wide frames the frames have horizontal bars the distance between them ten centimeters on each horizontal bar we hang a sheet of cloth its length twenty centimeters and its width is the width of the frame, all frames should have the sheets of cloth on the same side, when the wind blows from any direction the windmill rotates in the same direction, since the frames which are facing the wind one of them the wind will blow the sheets away and passes through the frame while the frame on the other side of the windmill the wind will blow the sheets of cloth but the horizontal bars stops them from blowing to the other side of the frame so they stick to the frame preventing the wind from passing through so all the frame will act like a big sail.

Abstract: A water turbine powered electrical generation system is disclosed. The generation system includes a water-driven turbine completely submerged below a flowing water source. The flowing water source rotates the turbine, which is coupled to an electrical generator. The electrical generator generates electrical power for distribution away from the electrical generation system. The electrical generation system may be located on a floating or submersible platform.

Abstract: A lift-type wind turbine having a substantially vertical rotating shaft and a plurality of substantially vertical blades secured to the shaft. Each blade includes a front portion, a rear portion, and a pivot axis pivotally securing the rear and front portions. The rear portion pivots relative the front portion. The blades additionally include bottom and top edges positioned on each of the front portions. Each bottom edge is arranged substantially equidistant from the shaft proximate a first circumference extending substantially horizontally about the shaft, whereas each top edge is arranged substantially equidistant from the shaft proximate a second circumference extending substantially horizontally about the shaft. The blades are angled relative to the rotating shaft. The blades have an open, drag means position as well as a closed, lift means position, and passively switch between the positions based on wind speed for efficient rotation.

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 wind turbine is provided having a lidar wind speed measurement apparatus for achieving wind control. The lidar apparatus is arranged to scan the area in front of the wind turbine so as to generate a measurement of the wind speed across the wind field. The lidar apparatus may be located in the hub of the wind turbine and the look direction inclined away from the rotational axis so that rotation of the hub ensures scanning. Preferably the lidar apparatus has a plurality of look directions so as to increase the scanning rate. This may be achieved by having a number of dedicated lidar systems and/or by using multiplexed lidars. Measurement of the wind field allows improved control of the wind turbine giving efficiency and reduced wear benefits.

Abstract: This invention refers to a hydraulic or pneumatic machine with tilting blades, running either as an engine on a fluid flow or on pressure fluid or as a pump or a compressor. The hydraulic or pneumatic machine on a fluid flow according to the invention consists of a cylindrical casing with inlet and outlet openings, radially arranged, diametrically oposed, along the fluid flowing direction, some disk like rotors with tilting blades, hinged over their front faces and provided with driving mechanisms of their own, and some fixed drums located between the rotors, concentrically to them, making inside the machine some channels, symetrically arranged on one or several stages. Flowing through the channels, the fluid drives the tilting blades causing the movement of the rotors, all the rotors moving to one sense being coupled to the same outlet shaft of the machine.

Abstract: A wind energy conversion device includes a propeller in which each of the propeller blades includes a proximal (radially inward) non-airfoil mounting section, a medial section and a distal tip section mounted to pivot relative to the medial section about a pitch axis running lengthwise of the blade. At low wind speeds, each tip section and its associated medial section cooperate to provide a single airfoil. When the propeller rpm exceeds a predetermined threshold, each of the tip sections begins to pivot toward a full governing position, which tends to reduce the propeller rpm. To permit wind tracking, the device is mounted to pivot on a vertical axis. The propeller blades are downwind of the vertical axis, and slightly inclined to define a cone diverging in the downwind direction. The electrical power generating components are located upwind of the propeller and centered about the propeller axis, and have a radius less than the length of the proximal blade sections.

Abstract: A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation.

Abstract: 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 connected to the torque arm (12). A coordinating system (46) is connected to the symmetrical clam shell turbine blades (14). The coordinating system (46) further comprises a first system (48) and second system (52). The first system (48) is connected to control and regulate opening and closing of the upper (16) and lower (18) halves of each individual clam shell turbine blade (14). The second system (52) is connected between each pair of the symmetrical clam shell turbine blades (14) so that as one clam shell turbine blade (14) closes the opposite clam shell turbine blade (14) is forced open.

Abstract: A wind power plant for producing electrical energy on a large scale, comprising a base, a housing, rotatable on said base around vertical axis. A wind tail, attached to the housing, rotate the housing toward direction of the wind, utilizing the power of the wind, and produces additional tunnel suction to the flow of the wind from front side to back side of the housing. A plurality of turbines, equipped with rotors with wide blades, is mounted inside the housing one above another. Deflectors cover from the wind the front side of the rotors above their axis of rotation while computer controlled governors are covering the remaining front side of the rotors below their axis of rotation, keeping steady the speed of rotation of the rotors. Working surfaces of turbines are covered from heavy snow and during the storm and protected from birds. Power plant saves the area of occupied land, utilizing higher speed of wind on higher elevations.

Abstract: This invention pertains to a horizontal axis wind turbine of down-wind design that tilts rather than teetering to overcome loads produced by gyroscopic precession. Gyroscopic precession occurs to the rotor as it is spinning when it turns to adjust to or follow a wind directional change. It is absolutely necessary to provide a means by which to overcome this phenomena as it can lead to structural failures due to it's extreme effects. Wind turbines that can not overcome these effects usually have an active yaw system that will turn them very slowly in order to not encounter the effects of the extreme loads produced by gyroscopic precession. This invention also provides a means by which to control the rotor speed based upon the using of the turbine's own weight as a basis for that control. These two functions work in unison and are immediate in their response to provide for a superior dynamic wind turbine design that will be more cost effective to produce as well as maintain.

Abstract: The Texas Turnstile WindCatcher uses a rigid upper sail to create a low pressure area that draws up a flexible lower sail to it as the wind passes over both sails on the return side of a vertical axis windmill. This aerodynamic action reduces the wind resistance of the sails on their return into the wind. This same action acts as a self-damper in high winds because the spinning of the rotor causes the sails to close and resist opening until the spin slows.

Abstract: Turbine for flowing fluid, especially a turbine having a vertical power output shaft and formed with several wings projecting radially out from the power output shaft, which wings are rotatable over an angle of about 90° about horizontal shafts extending closely adjacent and along the trailing edge of the wing as seen in the flow direction, so that the wings, in an operative, first position, are positioned at right angle to the flowing fluid and in a second, non-operative position, are located horizontally or nearly horizontally and on plane with the flowing fluid. Each wing is formed with a fin portion for catching, at a very early stage of an operation cycle, flow medium passing by and to thereby initiate a pressing down of the wing to a portion at right angle to the flow medium for, as far as possible, maintaining the flow medium against the wing during the active moving path thereof.

Abstract: 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 connected to the torque arm (12). A coordinating system (46) is connected to the symmetrical clam shell turbine blades (14). The coordinating system (46) further comprises a first system (48) and second system (52). The first system (48) is connected to control and regulate opening and closing of the upper (16) and lower (18) halves of each individual clam shell turbine blade (14). The second system (52) is connected between each pair of the symmetrical clam shell turbine blades (14) so that as one clam shell turbine blade (14) closes the opposite clam shell turbine blade (14) is forced open.

Abstract: System for harnessing wind energy with self-protection that includes a vertical shaft assembled with bearings on the rotating core. The core is equipped with a gear converting movement into energy. The core carries radial pieces in which there is an upper base that supports an ascending vertical shaft terminating in a discoid piece. The radial pieces carry internal shafts with bevel gears connected to the bevel gears assembled on vertical shafts mounted on blocks at the ends of the arms. The shafts carry ball joints, from which the extensions of the ascending shaft extend, provided with a crossbar with the pulleys provided with ties. The ties include elastic springs that fasten the double blades with the ties to the ascending shaft making it possible for the blades to become wound around it. This occurs when the assembly rotates in the opposite direction.

Abstract: A blade assembly for a windmill includes an output shaft with a first cross-shaft and a second cross-shaft operatively mounted relative to the output shaft. The first cross-shaft and the second cross-shaft include a first end and a distal end. A first blade is mounted on the first end of the first cross-shaft and the first cross-shaft is rotated by the first blade to impart rotation to the output shaft. A second blade is mounted on the distal end of the first cross-shaft and the first cross-shaft is rotated by the second blade to impart rotation to the output shaft. Stops are positioned on the first cross-shaft for limiting the rotation of the first cross-shaft relative to the output shaft. A third blade is mounted on the first end of the second cross-shaft and the second cross-shaft is rotated by the third blade to impart rotation to the output shaft.