Tethered Wind Turbine
Douglas J. Amick
Filed July 30, 2007
The tethered wind turbine uses an aerodynamic, flow concentrating shape and lighter-than-air construction utilizing a lifting gas and an electrically conductive tether fixed to the ground to reap energy from the wind at low or high altitude. Stabilizers and control surfaces can also be added for additional stability and control.
Wind Driven Power Plant
February 14, 1978
A tethered wind-driven floating power plant which includes a support body carrying at least one rotor assembly, a current generator coupled to the rotor and alignment assembly for aligning the rotor to face into the wind, a ground anchor and at least one captivating stay connecting the floating power plant to the anchor. The support body is hollow and gas-filled to carry its own weight as well as the weight of the rotor assembly, current generator and alignment assembly.
Wind Driven, High Altitude Power Apparatus
Charles Max Fry and Henry W. Hise
April 11, 1978
Short description:Wind driven rotors are affixed along the length of a flexible power shaft, and the shaft is suspended at a great height above the earth by means of a swivel. The lowermost end of the shaft is connected to rotate a ground supported energy conversion device. The winds aloft impart rotational motion into the wind rotors, whereupon the rotational energy of the shaft is converted into electrical power or other form of power by the conversion device.
Multiple Wind Turbine Tethered Airfoil Wind Energy Conversion System
Lloyd I. Biscomb
August 25, 1981
Short Description:A plurality of wind turbines are supported aloft on the same tethered airfoil which is provided with devices for orienting the wind turbines into the wind.
Tethered Airfoil Wind Energy Conversion System
Lloyd I. Biscomb
January 5, 1982
Short Description:A generally toric lighter-than-air gas bag-type airfoil is tethered to the ground at a plurality of angularly widely distributed points about the periphery of the gas bag. A wind turbine is mounted at the entrance to the axially central vent. The tether lines are entrained about individually operable power winches, preferably controlled by a microprocessor which takes in wind direction and tether line tension data and operates the winches and inflation gas inlet and outlet valves to orient the wind turbine into the wind for maximum power output.
Lighter Than Air Wind Energy Conversion System Utilizing an Internal Radial Disk Diffuser
Lighter Than Air Wind Energy Conversion System
Lighter Than Air Wind Energy Conversion System Utilizing An External Radial Disk Diffuser
Lighter Than Air Wind Energy Conversion System Utilizing A Rearwardly Mounted Internal Radial Disk Diffuser
William R. Benoit
September, 21 1982
Short Description:A lighter-than-air (LTA) wind energy conversion system (WECS) wherein the gas-filled LTA envelope carries a main rotor and electrical generator to take advantage of high winds available at high altitudes. The LTA envelope is tethered to a ground based mooring system designed to provide self-orientation for the LTA envelope. In a preferred embodiment, heavy mechanical transmissions are eliminated by providing a radial diffuser within the LTA envelope coupled through a drive shaft to a wind-driven external rotor. Rotation of the rotor-diffuser drives an induction turbine positioned within the gas inlet to the diffuser, the lifting gas for the envelope also serving as the working fluid for the turbine. The output of the induction turbine is coupled to an electrical generator whose output is, in turn, transmitted to the ground via the tethering system.
Lighter Than Air Wind Energy Conversion System Utilizing A Rotating Envelope
William R. Benoit
May 22, 1984
Short Description:See 4,350,896; 4,350,897; 4,350,898; and 4,350,899. The LTA envelope is adapted rotate with the main rotor and is tethered to a ground based mooring system designed to provide self-orientation for the LTA envelope. In a preferred embodiment, a hollow bladed main rotor is provided at the midpoint of the rotating envelope. The rotor drives an induction turbine positioned within a substantially linear duct which is, in turn, preferably located along the longitudinal axis of the rotating LTA envelope.
Wind Generator Kite System
Paul F. Pugh
December 4, 1984
Short Description:The wind generator is suspended in the air like a kite by wind currents and is attached to the earth by a high strength cable to which are attached electric cables and a natural gas pipe. The numerous small wind generators are mounted in a box-like kite enclosure, which are raised to the desired elevation by rotary blade power with the assistance of a gas balloon.
Airship-Floated Wind Turbine
William K. Watson
January 1, 1985
Short Description:This is a wind turbine that, supported by a tethered airship, may be designed for the economical recovery of power at heights of 2,000 ft or more above the ground.
Apparatus For Extracting Energy From Winds At High Altitudes
David H. Shepard/Cognitronics Corp.
February 25, 1986
Short Description:A wind-operated power-generating module for operation at high altitudes such as 1000 meters comprising a frame structure mounting a pair of vertically-separated parallel shafts around which pass endless belts supporting a series of parallel, elongate wing-like elements for movement around a closed path including the parallel shafts. Wind flow drives these elements around the closed path, to enable electrical power to be generated, and also provides lift to hold the module up at the appropriate altitude. A number of such modules are tethered in fixed positions in the sky, and are controllable as is appropriate to accommodate changing wind conditions.
Power Generation From High Altitude Winds
David H. Shepard/Cognitronics Corp.
April 21, 1987
Short Description:A kitecraft secured to a ground tether supports a cylindrical drum rotatable about a horizontal shaft. The drum comprises a plurality of wheels interconnected by airfoils positioned about the cylindrical surface of the drum. Wind action on the airfoils rotates the drum about the horizontal shaft and turns generators to provide electrical power.
Flexible Tethered Wind Turbine
Frank L. Carrol
May 23, 1989
Short Description:A flexible shaft supported by guy wires is provided at its upper end with a flexible rotor and an airfoil assembly. Rotation of the airfoils in response to wind creates centrifugal force and tension, which causes the rotor to become rigid during use. The light flexible shaft easily follows the rotating sails, which permits the entire turbine to automatically track the wind as it changes direction. As the rotor spins, its rotational energy is transferred to the shaft, which rotates along its entire flexible length.
Method of Controlling Operating Depth Of An Electricity-Generating Device Having A Tethered Water Current-Driven Turbine
James G. P. Dehlsen, James B. Dehlsen, and Geoffrey F. Deane
July 18, 2000
Short Description:This is a tethered airfoil with wind turbines attached on both sides. The turbine is designed for use in water, but the concept could easily be applied for use in the wind.
Tethered Aircraft System For Gathering Energy From Wind
Howard G. Carpenter
July 3, 2001
Short Description:The tethered aircraft of the system is blown by wind to travel downwind at a controlled rate for maximal mechanical energy gathering from wind whose velocity fluctuates and gusts. A cycle of travel is completed when the aircraft is has travelled upwind to the site of the beginning of downwind travel, where downwind travel is recommenced. The downwind travelling aircraft pullingly unwinds its tether from an anchored windlass drum to spin the rotor of an interconnected electrical machine to convert mechanical energy to electricity.
Hovering Wind Turbine
Aleandro Soares Macedo
October 31, 2006
Short Description:A hovering wind turbine whose blades lie on the surface of an imaginary horizontal cylinder and have their pitch angle changing as a function of the rotational angle, allowing them to gather wind energy mainly in the upwind and downwind sectors of the cylindrical path and to use a fraction of the gathered energy to create lift by deflecting air downwards, mainly in the upper and lower sectors of the cylindrical path. The remainder of the gathered wind energy is used to drive a pair of on board electrical generators, and anchoring tethers carry electrical current to a land of offshore site. The turbine is tied to a blimp that is purposely located in its wind shape and keeps it airborne during periods of light or no wind.
Precisely Controlled Flying Electric Generators
Bryan William Roberts and David Hammond Shepard
February 27, 2007
Short Description:One or more tethered platforms, each having three or more, mill rotors, are operated at altitudes in relatively high winds to generate electricity. These windmill kites use one or more electro-mechanical tethers on each platform. Their position, attitude and orientation are monitored by one or more GPS receivers and/or gyros and controlled through differential thrusts and torque-reactions produced by the mill rotors. The kites can be electrically powered from a ground supply during relatively calms periods, or landed if desired. During windy periods the kites may be used to generate electricity by tilting the rotors at an angle, or incidence to the oncoming wind.
Systems And Methods For Tethered Wind Turbines
Frederick D. Ferguson/Magenn Power, Inc.
February 26, 2008
Short Description:This patent describes systems and methods for tethered wind turbines. The system may comprise an airborne body extending horizontally along an axis between a first and a second point, wherein the body is at least partially filled with a gas. The system may further comprise, for example, two or more vanes coupled to the body such that the vanes, when acted upon by a wind force perpendicular to the axis are operable to cause the body to rotate about the axis to generate a Magnus effect lifting force. The system may also have one or more tethers coupled to anchor the body to a third point.
Tethered Rotary Kite
Craig V. Rundle and Gary L. Hooten
September 22, 1992
Short Description:This is a tethered, wind-powered flying device, generally known as a roto-kite, which allows for flight even in slight wind conditions and also functions well in strong wind conditions.
Bryan Williams Roberts
August 24, 2004
Short Description:See 7,183,663. A kite having a flying platform including a plurality of mill rotors, at least one tethering line maintaining the platform at a substantially fixed geographical location, at least one dynamo on the platform drive connected to the mill rotors, and a conductor connecting the dynamo to an electrical transmission and supply system at ground level.
Peter R. Payne and Charles McCutchen
October 26, 1976
Short Description:A device which lifts itself into the air and either itself carries a windmill for extractions of power from the wind, or traverses a oscillatory path back and forth across the wind such that the action of the tethering lines for the device can be used to generate useful power (such as electricity).
Power Generating Apparatus
Andrew Martin Rolt
January 8, 2008
Short Description:This is a power generating apparatus including a cable which rotatably mounts a plurality of power units. The power units include wind power turbines for producing power from the wind as the power units fly in the sky whilst connected to the cable.
Tethered Lighter Than Air Turbine
Oliver J. Kushto
June 10, 1980
Short Description:This patent describes a wind turbine comprising a lighter than air body affixed to a drive line. Vanes or fins are attached about the body and turn the body in response to air currents acting thereon. This turns the drive line to supply rotational energy to a load.
Gijsbert J. Engelsman
September 11, 1984
Short Description:One or more lighter-than-air bodies carry wind energy catching rotor devices, like windmills, turbines, or similar, and catch energy from the wind, which is transmitted mechanically to the earth by at least one endless cable-rope transmission.
Airship Power Turbine
William J. Mouton and David F. Thompson
September 4, 1979
Short Description:Power is mechanically transmitted from a tethered airship carrying wind turbines to electrical generators on the ground at the anchor point of the tether, by the use of endless power-transmission cables bridging between drive sheaves at the turbine wheels and driven sheaves at the generators.
Serpentine Wind Turbine
Douglas Spriggs Selsam
Short Description:Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft. The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft. Power is drawn from the shaft at the base. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure.
Aerialwind Power Generation System And Method
Gaylord G. Olson
March 13, 2007
Short Description:This is an aerial power generation system that includes a guide line supported by a support body. Wind driven elements are configured and shaped to provide maximum force from both lift and drag during the downwind phase of operation and minimum force during the upwind phase. The guide lines add stability to the system and provide better control over the angular orientation and direction of motion. Power transfer is through one or more tow lines connected from the driven elements to power generation devices on the ground.
Wind Energy Production Using Kites And Ground Mounted Power Generators
Gordon Bruce Kingsley
Filed September 3, 2003
Short Description:This patent describes a system of traction kites that generate power by generating lift, which causes a cable to be unreeled from a ground-based drum and generate mechanical or electrical energy. The kites can travel as far as the length of the cable allows. Once the final length of cable has been extended, the kites are retrieved by minimizing the angle of attack of the kites and reversing the shaft rotation of the drum to reel them back in.
Apparatus For Extracting Energy From Winds At Significant Height Above The Surface
February 28, 1978
Short Description:This invention employs a series of sails which may be comprised of a hollow buoyant body filled with lighter than air gas. The buoyant sail has a concave surface facing the incoming wind and is designed to lift with it the necessary tether line leading from the body to the ground level structure which might include an electric generator. The sails are employed in series with the sails alternately being played out under the influence of the wind and then drawn back while presenting a smaller effective surface to the wind.
Wind Driven Energy System
November 7, 1978
Short Description:This patent describes a train of tethered kites for capturing wind energy, in which each train contains a series of kites. The trains are secured by a power line to an earthbound drum or windlass selectively rotatable in both clockwise and counter-clockwise directions to either reel in the power lines, or to enable the power lines to be pulled upwardly and outwardly by the action of the winds.
Wind-Driven Driving Apparatus Employing Kites
Wubbo Johannes Ockels
June 6, 2000
Short Description:This is a driving apparatus for driving a drive shaft, which includes a number of kites and at least one pulling cable, a means for varying the position of the kites. The kites are arranged to follow an ascending path and a descending path.
Axial-Mode Linear Wind-Turbine
Gary Dean Ragner
February 25, 2003
Short Description:The system comprises multiple airfoil kites in tandem attached to a pivotal control housing by control lines and support. The control lines can change length with respect to the length of the support lines and to control the airfoil kites’ angle-of-attack, pitch angle, direction of flight, and flight speed. Control lines and support lines are also wound on a power shaft and pulley system. The airfoil kites are reeled out under axial tension due to their lift, causing the power shaft and pulley system to turn a generator, which produces electricity. After the reel-out power stroke, the kites’ angle of attack is adjusted to minimize the cable tension so that the kites can be reeled back in.
Apparatus For Extracting Energy From Winds At Significant Height Above The Surface
December 9, 1975
Short Description:A buoyant wing is tethered to a line an appreciable distance above the surface where the winds are at higher speed than at ground level, the other end of the line is attached, for example, to an electrical generator, and provision is made for adjusting the position of the wing so that when a series of wings are utilized together with an electrical generator, one wing may be retracted while at least one other wing, which is positioned to catch the wind, is drawn away from the generator.
Wind Driven Apparatus For Power Generation
Miles L. Loyd
February 17, 1981
Short Description:This patent describes a wind driven apparatus for the production of power at a ground location. The system includes an aerodynamic lift generating vehicle capable of maintaining a stable airborne orientation, a tether linking the vehicle to a ground location, mechanical power generating equipment carried by the vehicle and responsive to relative motion between the air and the vehicle, apparatus for converting the generated power to reciprocating motion and structure for transmitting the reciprocating motion along the tether to the ground.
John R. Webster/Rolls-Royce plc
Short Description:A power generator comprising: a lifting body for suspension in a moving fluid; a control station; and at least two tethers for tethering the lifting body to the control station. The control station is arranged to transform oscillating tension in the tethers produced by an oscillating movement of the lifting body into mechanical motion.
Renewable Energy Systems Using Long-Stroke Open-Channel Reciprocating Engines
John V. Mizzi
Short Description:This patent includes a renewable energy system for extracting energy from the wind. The energy system is a configuration of long-stroke open-channel reciprocating engines employing airfoils tethered to a power drum to generate electricity.
Electrical Power Generation Assembly
David S. Knott/Rolls-Royce plc
May 1, 2007
Short Description:This is an electrical power generation assembly comprising a main body having a low density to provide lift and wind driven means on its surface to generate electrical power. The main body has a part-circular, or a part-elliptical cross-section frontal region.
Cable Suspended Windmill
Moses G. Farmer\NASA Langley
January 16, 1990
Short Description:This wind mill invention consists of an airframe having an upwind end and a downwind end, a first rotor rotatably connected to the airframe, and a generator supported by the airframe and driven by the rotor. The airframe is supported vertically in an elevated disposition by poles which extend vertically upwardly from the ground and support cables which extend between the vertical poles. Suspension cables suspend the airframe from the support cable.
Multi-Rotor Kite Glider
Stephen J. Janicki
June 8, 1999
Short Description:A kite employing a controllable transmission between two specialized types of rotor assemblies. The torque rotor assembly is designed to rotate when placed in a stream of wind, collecting power from the wind in the form of lift and torque.
Wind Energy Device
Norbert L. Osborn
January 16, 1996
Short Description:This device generates rotating shaft power from wind energy. A partition exists along the length of the leading edge of an airfoil. A turbine is placed within the airfoil and adapted to be driven by fluid pressure entering the leading edge and exiting the top surface of the airfoil.
Alpin I. Dunn
June 18, 1929
Short Description:The invention consists of a LTA airship that has a longitudinally extending air tube open at both ends. The tube contains an air motor adapted to be driven by the wind rushing through the tube during normal operation of the ship.
Igor Sergeevich Orlov, Emmanuil Avraamovich Sobol, and Mikhail Andreevich Egorov
May 7, 2002
Short Description:This patent describes a particular wind turbine design, not necessarily airborne. But, to achieve greater power output the turbine can be placed at high altitudes using lighter than air gases in an aerostat configuration, as the above the illustrations above imply.
Electrically Powered Glider
February 6, 1945
Short Description:This invention consists of a glider that is partially supported by buoyant gas. The glider has a propeller that can be manually disconnected from its motor in order to act as a turbine and transmit energy to a generator, which generates electricity to recharge the battery.
Elevated Sailing Apparatus
August 9, 2005
Short Description:An elevated sailing apparatus that includes one or more wings, tethered to a conveyance, and suspended from beneath a streamlined, lighter-than-air blimp.
Launch And Retrieval Arrangement For An Aerodynamic Profile Element And An Aerodynamic Profile Element
Stephan Wrage and Stephan Brabeck/SkySails GmbH & Co. KG
October 30, 2007
Short Description:This invention consists of an inflatable traction kite that can be used to drive a watercraft.
Wind Energy Plant With A Steerable Kite
Stephan Wrage and Stephan Brabeck/SkySails GmbH & Co. KG
March 17, 2009
Short Description:This patent describes a tethered traction kite that generates lift from the wind causing the tether to unravel from a ground-based drum, which is connected to an electricity-producing generator.
Process Of Converting Wind Energy To Elemental Hydrogen and Apparatus Therefor
Robert E. Salomon/ Temple University
June 15, 1982
Short Description:This is a modified sailing vessel that uses a balloon as a means of propulsion. While underway, an immersed screw propeller converts the ship’s motion into rotational motion, which provides power to an electromagnetic generator which, in turn, produces electricity. The electric current is then used to electrolytically decompose water into hydrogen and oxygen.
Thomas F. Ransick/ Sundstrand Corporation
September 29, 1992
Short Description:An apparatus for generating power from a trailing vortex induced at the wingtip of an aircraft. A turbine is mounted on the wingtip and is disposed in the trailing vortex.
Airborne Wind Turbine Electricity Generating Sytem
September 1, 2009
Short Description:An airborne system for producing electricity from wind energy includes a shaft, at least two turbines rotatably mounted to the shaft and arranged to rotate independent of one another and in opposite directions when subjected to the same wind, and generators which convert rotation of the turbines into electricity.
Method of Utilization A Flow Energy And Installation For It
Alexander Alexandrovich Bolonkin
Filed September 6, 2001
Short Description:The invention consists of a large blade-rope type wind rotor suspended by a wing at high altitude to extract huge amounts of energy from the wind. A rope transmits power to a ground-based electrical generator.
System For Performing The Automatic Control Of The Flight Of Kites
Mario Milanese, Andrea Milanese, and Carlo Novara
Filed November 30, 2007
Short Description:A system is described for performing the automatic control of the flight of at least one kite controlled and driven by cables comprising at least one first actuating motor adapted to exert unwinding-rewinding action. This patent was filed by people involved with KiteGen.
Aeolian System Comprising Power Wing Profiles and Process For Producing Electric Energy
Massimo Ippolito and France Taddei
April 24, 2004
Short Description:This patent describes a system that consists of a wing profile, or kite, that is connected by two cables to a ground-based winch. The cables control the power generation and attitude of the wing profile. The wing profile generates power from the wind and transmits this power to the ground via the cables.
Airborne Stabilized Wind Turbines System
May 4, 2010
Short Description:See 7,582,981. A lifting section includes combination of kites and lighter than air balloons, generating a lifting force that causes the system to be airborne at a desired altitude.
Laminar Air Turbine
Donald L. Richter
May 8, 2007
Short Description:The windmill assembly is a low drag, streamlined body of revolution that captures the kinetic energy content of the accelerated laminar air surrounding the body. The assembly includes a power-generating, wind-driven turbine that is compact, lightweight and capable of producing a substantially greater output than a conventional windmill with a comparable size rotor.
Scavenger Energy Converter System Its New Applications And Its Control Systems
Gaudencio A. Labrador
December 11, 2001
Short Description:This patent describes several different wide face fluid energy conversion systems based on the assumption that a larger surface results in more power conversion.
Faired Tether For Wind Power Generation Systems
Saul Griffith, Peter Lynn, Don Montague, and Corwin Hardham/ Makani Power, Inc.
Filed May 23, 2008
Short Description:This patent application describes a tether for a wind power system. The tether has a cross-section that is designed to have less aerodynamic drag than a tether with a circular-shaped cross-section.
Atmospheric Resources Explorer
Tiago Da Costa Duarte Pardal and Marco Aurelio Baptista De Almeida Freire
Filed May 31, 2007
Short Description:The invention consists of tethered kites that generate power by unwinding the tether from a ground based drum under tension caused by lift. Power is generated in a work phase and the kites are reeled back in a recovery phase. The tension forces on the tether can be controlled by using a control unit that alters the flight of the kites.
Kite-like Flying Device With Dual Handles And Four Point Control
Joseph R. Hadzicki
Filed October 14, 1988
A preferred embodiment of the present invention includes a kite having a sail with a left and right wing, each being connected to a supporting frame, with the frame having a leading edge support member associated with a left wing strut member and with a right wing strut member.
Method For Locating The Resultant Of Wind Effects On Tethered Aircraft
Howard G. Carpenter
Filed March 8, 1994
Short Description:A method for the determination of the location of the line-of-action of the resultant of the wind forces on a tethered aircraft is disclosed. The location is referenced to a line-segment that is referenced in turn to the aircraft structure.
Sea Current Energy System
Gerald T. Howard
Filed October 20, 1980
Short Description:A system for extracting useful energy from sea currents. A pair of drag inducing devices is disposed in the sea current, and connected by cables to a windlass at a location upstream of the drag devices. Each drag device has a selectably variable drag resistance in the sea current, and the drag.
Wind Power Converter
Filed December 30, 1981
Short Description:A high torque windmill is provided for use in converting wind power to usable energy, having a vertical axis about which a plurality of flexible vanes are journaled for rotation and spaced radially therefrom. The vanes are circumferentially spaced and mounted on a rigid circular, multi-sided.
Paul F.R. Weyers
A dome-shaped atoll structure (12) having a central aperture at its apex is secured to a station-keeping structure (11, or 40, or 52) positioned on the ocean bottom. The atoll structure (12) is moveable through a range of vertical positions relative to the ocean bottom. Sea waves impinging on the atoll structure (12) are refracted as they crest and break, thereby producing spiralling pulses of water that converge toward the central aperture. The central aperture provides entry into a vertical standpipe (14) for the pulses of water, which impart angular momentum to water already present in the standpipe (14). A turbine (31) attached to a shaft (28) in the standpipe (14) converts the rotational energy of the water in the standpipe (14) to rotational energy of the shaft (28), which is coupled to an electrical generator (27). The electric power output of the generator (27) is measured for various vertical positions through which the atoll member (12) is moved, so that a position of optimum power output can be determined for any given combination of sea state and/or tidal conditions.
Spring Motor Powered Electricity Generation System Actuated By Reciprocating Natural Forces
Filed September 13, 2002
Short Description:An electricity generation system that has the ability to generate clean electrical power by mechanically capturing the tremendous power of large trees as they sway in the wind. The system utilizes a modular unit that is mounted on a frame assembly covered by a housing. A plurality of spring motors are mounted in a spring motor housing that is journaled on an elongated spring-motor secondary winding axle. The inner end of each spring motor metal band is secured to the spring-motor secondary winding axle. The spring motor housing is releasably connected to a stationary retention plate to prevent rotation of the spring motor housing until the spring motors are wound a sufficient amount. A cable tether member has one end attached a tree trunk adjacent its upper area and the other end of the tether line is secured to the front end of a ratcheting arm. When the wind force bends the tree from it static upright position, the ratcheting arm is pulled downwardly causing a winding drive spur gear to rotate causing the spring motors to be wound incrementally each time the wind blows the tree from it static upright position. An electricity generator is mounted on the frame assembly and there is rotation transmission structure connected to the power generation drive shaft of the electricity generator. When the spring motor assembly has been sufficiently wound, a timing gear assembly releases the motor spring housing assembly allowing it to rotate freely to dissipate its stored energy and drive the electricity generator. This cycle is repeated throughout the day to generate electricity when the wind is blowing. A modified electricity generation system utilizes the wave motion of a natural body of water by tethering the ratchet arm to a floating buoy.
Valvular Sail Power Plant
John M. Goldwater
March 11, 1985
Short Description:A windmill generally intended to rotate in a horizontal plane about a vertical axis, includes essentially radial vanes; each which is effectively a one way valve respective to air flow; each which can enhance (or supplement) the beneficial actions of the others; and each of which vanes, in operation, effectively simulates a sailing vessel navigating a circular course in wind of constant direction. Each of said vanes includes a framework which supports a grid, which grid is the supporting means for a plurality of pivotally connected vertically aligned and overlapping light weight flexible sails, which sails are automatically rotated about said pivotal connection by the force of the wind into positions promoting the revolution of the windmill. Included with said sails are various devices as spars, springs and cords which promote and enhance their efficient automatic operation. The windmill is inherently self protecting in high winds and self regulating in speed of rotation. The windmill is shown in several embodiments and means of mounting, including which can utilize already existing structures for height and support and which float upon a body of water. Also shown are several means utilizing this invention to efficiently and inexpensively drive electrical generators, or alternators now used in automobiles, at high RPM without need of a separate step-up transmission. Discussed also is the interfacing of the electrical power generated with the existing electrical utility power lines. The windmill is shown in sizes which range from very large, for electrical generation on a commercial scale, to small sizes which can be mounted upon the roof of a household for providing electrical power directly and solely thereto. Also discussed is the use of this invention (or appropriateness) in less technologically developed, remote, or areas otherwise deficient in energy resources. Also discloses is the use of this invention to better propell sailing vessels.
Free Wing Turbine
Laird B. Gogins
July 5, 1979
Short Description:Apparatus to convert wind energy into mechanical and electrical energy including a variable pitch air-foil supported by tension guy wires on a wheeled structure constrained to move upon a continuous track. The structure includes electrical generators powered by the rotation of the structure's wheels to convert movement of the structure into electrical energy. The air-foil is supported upright on the wheeled structure, which is designed to resist upward, downward and sideways forces, to capture wind energy at a higher elevation above the ground where winds blow stronger.
Power Generating Device
Gerald E. Steelman
Filed December 20, 1973
Short Description:A power generating device comprises a continuous elongated flexible loop member having opposite loop ends and adapted to be suspended in a current of flowing fluid. The loop member is trained around a rotatable member which in turn is drivingly connected to an electrical generating power means. A plurality of flexible and collapsible containers or sails are mounted in spaced relationship and in end to end relationship along the loop member. When immersed in a current of moving fluid, the containers will be expanded and filled by the fluid when their open ends are facing upstream in relation to the current and they will be collapsed and emptied of fluid when their open ends are facing downstream in relation to the current. Thus the containers will drive the loop member and consequently the rotatable member continuously whenever the loop member and containers are immersed in a flowing fluid material.
Rotatable Airfoil Kite
Jesse C. Donaldson
Filed April 6, 1948
Short Description:This invention relates to aero-dynamics and more especially to an air-foil structure mounted for rotation about a longitudinal axis as a result of air flow across or at an angle to such axis.
Rotary Winged Kite
Stanley E. Albertson Jr.
Filed July 6, 1959
Short Description:This invention relates to kites and has particular reference to a kite having a pair of rotary wings, or air foils, which can be controlled from the ground by novel means, which enable the operator to produce a variety of interesting, entertaining, and educational results.
Apparatus and Method For Aerodynamic Wing
David A. Culp
Filed December 16, 2003
Short Description:Aerodynamic wing to propel a broad range of transport means, principally sail craft. The wing provides a single layer kite structure capable of flying without surface discontinuity, bridles, or rigid or semi-rigid structure. All stresses within the wing are converted into pure tension and transferred through the wing surface outward to attachment lines. The wing shape defines a large diameter self-supporting rolled over leading edge of an airfoil and the wing profile approaching the trailing edge exhibits increasing convexity. The wing is useful to propel, or supplement propulsion to, transportation means.
Andrew W. Jones and Raymond Merry
Filed August 19, 1977
Short Description:An aerofoil structure which is inflatable by ram air when in use, includes a flexible multi-cell air fillable envelope having a readily removable flexible spar at its leading edge whose ends provide anchorages for a pair of operator control lines. In use the spar flexs to accommodate variations in air speed over the envelope.
Filed September 19, 1988
Short Description:A steerable kite is disclosed that has lateral members, a cross-strut, a covering and a kite controlling apparatus. The lateral members are secured to each other at adjacent ends, and the cross-strut's opposing ends are each attached to a lateral member. The kite controlling apparatus is fastened at the connecting points of the lateral members and the cross-strut and lateral members. This arrangement of elements provides a kite with a single-chamber system that is operationally stable at various wind intensities.
Self Regulating Pinwheel Kite Tail
Rudy W. Harburg
May 14, 1990
Short Description:A swivel on a string is attached to the windward face of a pinwheel turbine. The other end of the string is attached to the aft portion of a kite thus creating a kite tail. Wind against its veins and leeward parts stabilize the pinwheel's orientation and cause it to spin. The pinwheel is light but tends to produce drag proportional to the velocity of the wind, thereby, stabilizing the kite in both low winds and high winds. A multiplicity of pinwheels can be attached in series on one kite tail, and one or more such kite tails can be attached to a kite to provide directional stability. This self-regulating tail can be used to help keep a kite airborne in an extremely wide range of wind speeds.