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7547985 |
Wind turbine apparatus
Conventionally, a main shaft of the wind turbine apparatus has awkward such as heaviness or difficulties of assembling, since the length of the main shaft must be long to support a generator rotor....
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7335000 |
Systems and methods for tethered wind turbines
According to some embodiments, systems and methods for tethered wind turbines may be provided. In some embodiments, a system may comprise an airborne body extending horizontally along an axis...
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7084522 |
Wind energy unit comprising a hollow shaft for rotor hub and generator
In a wind power installation with a (hollow) axis tube member and a hollow shaft mounted thereon for the rotor there is provided only a single bearing which also carries moments, between the axis...
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7008176 |
Molecular speed and direction selection
A technique of generating a flow from a gas. The technique includes the steps of selecting molecules from the gas on a nanoscopic or microscopic scale, and generating the flow from the selected...
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6973792 |
Method of and apparatus for a multi-stage boundary layer engine and process cell
A multi-staged boundary layer engine and process cell, (based on the effect known as adhesion and viscosity) which achieves high thermal efficiencies and high mechanical power output for use in the...
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6932564 |
Heteroscopic turbine
A heteroscopic turbine with a Knudsen number of less than ten. In one embodiment, the heteroscopic turbine generates a flow from a gas. The turbine includes at least a moving surface and a...
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6726443 |
Micromachines
A micromachine including at least one bladeless rotor, said rotor being adapted to impart energy to device energy to or derive energy from a fluid. A rotor for a micromachine comprising at least a...
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6726442 |
Disc turbine inlet to assist self-starting
A disc turbine inlet collects working fluid, introduces it into the rotor housing at a defined location and imparted at a defined injection angle with respect to the tangential motion of the discs...
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6452287 |
Windmill and method to use same to generate electricity, pumped air or rotational shaft energy
An improved windmill and a method for generating electricity, pumped air or rotational shaft energy are provided. A vertical mast rotatably mounts one end of a substantially horizontal and upward...
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6375424 |
Magnus effect horizontal axis wind turbine
A turbine and method which employ kinetic and potential energy of a fluid to obtain mechanical and/or electric energy, is founded on the use of bulb shaped rotating blades that interact with a...
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6318962 |
Device for generating an aerodynamic force by rotational movement
A generator of aerodynamic force by rotational movement, by means of a device which, starting from a rotational movement, induces a field of velocities in the surrounding fluid, which produces a...
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6227796 |
Conical stacked-disk impeller for viscous liquids
One or more improved pump impellers are provided and are rotationally supported in a pump having one or more stages. The improved impeller comprises a fluid induction core of flow passages...
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5669758 |
Wind turbine
A wind turbine having a central deflecting cone and a shroud surrounding the cone. The shroud in cooperation with the cone direct air flow to turbine blades which extend across the narrowest gap...
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5224826 |
Piezoelectric helicopter blade flap actuator
Electrically deformable material such as piezoelectric material is used to deform a deflectable flap on an airfoil such as a helicopter blade. The electrically deformable material is controlled to...
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4938660 |
Pump for viscous fluids
The invention is directed to a pump for use as a lubricating oil pump in internal combustion engines of handheld portable tools such as motor-driven chain saws or the like. The pump includes a body...
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4630997 |
Apparatus for producing a force when in a moving fluid
A device for producing a force when in a moving fluid, such as air or water, and a method for using said device. The device may be placed in a fluid moving in a first direction for producing a...
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4602584 |
Propulsion device for a ship
A propulsion system for a vessel comprises a conventional screw and rudder arrangement and includes one or more rotor sails in the form of an elliptical cylinder upstanding from the deck of the...
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4582013 |
Self-adjusting wind power machine
A machine for economical recovery of wind power employs a self-adjusting mass-balanced aerodynamic blade weathervaning freely around a lengthwise pitching axis forward of its aerodynamic center,...
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4576581 |
Reversible Magnus propeller
The thrust of a Magnus propeller is made reversible by reversing the rotation of the Magnus cylinders independently of the direction of rotation of the propeller shaft. Reversible drives for the...
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4571192 |
Self propelled spherical vehicle
A self-propelled spherical vehicle (10) for operation in a fluid medium utilizes an impeller (12) of approximately half the diameter of the sphere for propulsion. In addition to driving the...
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4535714 |
Rudder rotor for watercraft and floating equipment
The invention relates to an electric rudder rotor which in its simplest construction is in the form of an externally running underwater electric motor and comprises a fixed stator and a rotating...
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4452007 |
Horizontal axis rotatory frustum flying toy
The Horizontal Axis Rotatory Frustum Toy is a catapulted cylinderlike flying-wing glider that rotates horizontally to produce lift and quite slow flight, suitable indoors or out. A rubber band or...
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4446379 |
Magnus effect power generator
Magnus cylinders are mounted for rotation at right angles to shafts that are revolved about a generally vertical axis. The shafts are free to rotate 180°. The Magnus cylinders are continuously...
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4411135 |
Drive unit, especially for motor vehicles
A drive unit of the type that includes an internal combustion engine and a waste-heat turbine unit that has a compressor, a secondary turbine, and an exhaust-gas turbine with hollow blades, within...
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4401284 |
Collapsible magnus-effect rotor
A lift-producing arrangement suitable for driving a boat by the Magnus effect comprises an elongate tubular envelope mounted for rotation about its longitudinal axis. A drive is provided to rotate...
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4398895 |
Wind propulsion devices
Wind-assisted power elements comprising paired rotors of which each rotor is independently rotated at a peripheral speed of about 2 to 4 times that of the wind, and the rotors are mounted in tandem...
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4366386 |
Magnus air turbine system
A Magnus effect windmill for generating electrical power is disclosed. A large nacelle-hub mounted pivotally (in Azimuth) atop a support tower carries, in the example disclosed, three elongated...
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4316721 |
Method for producing a thrust in manoeuvering engines for a watercraft and a manoeuvering engine constructed for the same
The invention relates to a method for producing a thrust in manoeuvering engines for watercraft and a manoeuvering engine constructed for the same, whereby the method comprises the annular driving...
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4252352 |
Sealing ring
A sealing ring for a rotary shaft is disclosed. The sealing ring has a planar frusto-conical configuration and is received in an obliquely slanted groove provided in either the rotary shaft or the...
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4225286 |
Thrust generating device
A device for generating a thrust in a liquid utilizing rotating cylinders. The cylinders are mounted on a rotatable hub and rotate about their own axes relative to the hub. The relative rotation...
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3902045 |
Electric convection heater having a friction-type blower
An electrical resistance convection heater has a friction-type blower rotor comprising a plurality of spaced annular fins in the form of a helix of substantially flat laminar material. The pitch of...
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3866668 |
METHOD OF HEAT EXCHANGE USING ROTARY HEAT EXCHANGER
A rotary heat exchanger comprising an array of closely spaced parallel annular thermally conductive fins mounted coaxially for rotation as a unit. A plurality of thermally conductive heat exchange...
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3751908 |
TURBINE-COMPRESSOR
A turbine-compressor for feeding a gas to a combustion chamber. Within a housing having an inner cylindrical wall, is a rotor having circumferentially grooved passages. One portion of the housing...
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3734641 |
AERODYNAMIC OR HYDRODYNAMIC ELEMENT, SUCH AS A WING OR A BLADE
Wings, blades and such aerodynamic and hydrodynamic elements, which are profiled to experience in a stream of a gas or a liquid a transverse force and which are provided with a moving surface...
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3692259 |
WING-TIP VORTICES CONTROL
This invention is for wings of all types, such as fixed wings for aircraft and hydrofoil boat, and rotary blades (or wings) for helicopters and turbines, to be equipped with a row of chordwise...
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3656450 |
FLUID PROPULSION MECHANISMS
Fluid propulsion mechanism, for example, a marine craft propulsion mechanism, a pump or turbine, comprising a drivable impeller for partial immersion in the fluid. The impeller is substantially...
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3650632 |
FRICTION DRIVE ROTARY ENGINE
A casing having a circular bore therein, a rotor rotatably mounted within the bore, inlet and exit vents leading to and from the bore, and valves connected to the vents outside the casing for...
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3627234 |
AIRCRAFT WITH LIFT ROTORS
An aircraft having at least one horizontal engine unit and lift rotors disposed symmetrically with respect to the fuselage. Each of the rotor blades of the lift rotors includes a rotating drum for...
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3617148 |
THRUST BEARING FOR REFRIGERATION COMPRESSOR
The thrust bearing disc is formed in the face side engaging the thrust collar with grooves extending outwardly from the shaft to an annular enclosed space. An oil and refrigerant mixture is...
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3584811 |
DEVICES OF PRODUCING AERODYNAMIC LIFT
An aerodynamic lift-producing body for an aircraft, in the form of a blown pole, in which air can be blown selectively in either circumferential direction over the outer surface of the pole, or in...
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3540681 |
ROTARY WING CONSTRUCTION
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3539273 |
VORTEX GENERATOR
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3446149 |
PUMP
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3423014 |
ROTARY VACUUM PUMPS
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3162401 |
Aircraft and lift devices therefor
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3120275 |
Rotor construction
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3099221 |
Centrifugal pump
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3081931 |
Compressor structure
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3017848 |
Boat propulsion unit
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2954919 |
Method and apparatus for increasing the pumping effect of a rotating disc
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