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7465147 |
Portable power generating devices
Portable power generating devices are provided for converting potential energy from flowing water, water current, blowing air or air current to mechanical and/or electrical energy. The potential...
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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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7204674 |
Rotor blade for a wind power installation
A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly...
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7011501 |
Energy generating system
A system ( 1 ) designed to generate energy with the aid of, primarily, sea currents, comprising a rotation body ( 4 ) having a front inlet side ( 2 ) and a rear outlet side ( 3 ), and at least one...
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6840740 |
Bucket dovetail design for turbine rotors
A turbine bucket dovetail secures buckets in a turbine rotor. The turbine bucket dovetail includes a plurality of hooks engageable with a wheel post of the turbine rotor, which hooks extend in an...
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6806586 |
Apparatus and method to convert marine current into electrical power
A marine current power installation that takes energy from marine currents. The marine current power installation takes kinetic energy of flow from the marine current and converts the kinetic...
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6764275 |
Fluid displacement rotational assembly
A fluid displacement rotational assembly includes a frame, a support structure supporting the frame for rotating an axle connected to the frame, chamber members coupled to the frame and each...
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6616403 |
Floating electric generator
A device for obtaining electric power from moving water, made up of a floating cylindrical body having a first end extending to a second end along a cylindrical surface having at least two blades....
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6217284 |
Oscillating fluid flow motor
An oscillating fluid flow motor and a fluid flow power system that converts the energy in the flowing fluid to mechanical energy through a vane that automatically sweeps back and forth across the...
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5946909 |
Floating turbine system for generating power
A series of floating turbine rotors each have a tubular hub with outwardly projecting blades, and the rotors are connected in general axial alignment by a flexible driven shaft. The shaft includes...
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5324988 |
System for undersea wave generation of electric power
A system for generating electric power using undersea waves against a bag structure, mounted movably on a tower. The bag structure is made of large nylon bag, filled with compressed sea water and...
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5297925 |
Water column floating pump
This new invention, the water column floating pump, is a fluid pump which uses a rotationally symmetric container to pump fluid from an inlet reservoir to the outlet end of the rotationally...
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4849647 |
Floating water turbine
A floating water turbine for taking the kinetic energy from linear current flow and converting it into mechanical energy and subsequently into electrical energy. The turbine is constructed of a...
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4789303 |
Marine propeller carry handle and emergency spare kit
A marine emergency spare propeller kit includes a plastic floating spare propeller (4) mounted on a carry handle (20) having an axial shaft (22) extending through the propeller hub (10) and...
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4722665 |
Turbine
A water turbine has a series of spaced blades attached to and extending around the periphery of a body portion, preferably of conical or similar shape; each of the blades has a leading end mounted...
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4692100 |
Vacuum blade for a hollow type fan and process
The interior of a hollow propeller blade is placed under vacuum for enhancing rigidity of the blade and reducing noise production during its rotation.
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4552538 |
Multidirectional amphibious safety vehicle
A multidirectional amphibious safety vehicle comprises an outer cylindrical shell having two opposite ends and a longitudinal axis therethrough; a stationary central pipe having two opposite ends...
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4547124 |
Impeller for a wind motor
An impeller for a windmotor consists of a rigid hub attached to a rotatingly mounted shaft, an outer rim concentric with the hub and a number of radial vanes of a flexible material, such as fabric,...
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4511808 |
Installation for exploiting water currents in flowing waters by means of a plurality of water wheels
An installation for exploiting the energy of flowing water in a river stream comprising a plurality of anchored pontoons supporting a plurality of waterwheels; the pontoons being arranged in a...
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4412417 |
Wave energy converter
An improved rotational buoyant mass for wave energy conversion apparatus is disclosed. The rotational buoyant mass comprises at least one pair of helical volumes mounted for rotation about a common...
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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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4379701 |
Buoyant apparatus propelled by a human operator
A buoyant apparatus propelled by a human operator has a pair of side by side annular floats and a pontoon rotatably mounted at the corners of a triangular frame. A pair of platforms are each...
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4366936 |
Aircraft having buoyant gas balloon
An airship is provided utilizing a spherical balloon filled with buoyant gas such as helium at a pressure substantially greater than atmospheric so that its dimensions are substantially unaffected...
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4207026 |
Tethered lighter than air turbine
The disclosure relates to 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...
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D254204 |
Life preserver
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4124182 |
Wind driven energy system
Method and apparatus using parakites, or modified parachutes, for capturing wind energy and for converting the consequent wind-induced linear motion to shaft rotation. The parakite apparatus...
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4083652 |
Inflatable air-driven motor
A centrifugal air-driven motor, or windmill, is disclosed wherein the blades thereof are made of a pliable, flexible, uniformly apertured sheeting made, for example, of plastic, affixed by a...
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4045148 |
Turbine
A turbine with a water-driven motive element adapted for being immersed in a body of water and comprising a disc having a density close to that of the water in which it is immersed. The disc is...
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3990808 |
Inflatable blower
A centrifugal blower is disclosed wherein the impeller blades are made of a pliable, flexible, uniformly apertured sheeting made, for example, of plastic, affixed by a flexible support system, to a...
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3957232 |
Inflatable wing
An inflatable structure for use as an aerodynamic surface. The structure is formed from a series of cylindrical pressure chambers which are inflated to deploy the structure from its stored...
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3884176 |
Propulsive force generating means for marine vehicles
A propulsive force generating device is provided for marine vehicles consisting of parallel rollers rotating within a space on the underside of the vehicle and a sheet of flexible material of...
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3844677 |
BLUNTED LEADING EDGE FAN BLADE FOR NOISE REDUCTION
A turbomachinery rotor blade includes a leading edge with a blunted contour over at least a portion of the radial length thereof. The blunting is accomplished in a variety of ways, such as by...
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3743440 |
ROTARY, TUBULAR IMPELLER
A helicopter, autogyro, windmill or other impeller, comprising blades, optionally resilient or substantially rigid, each having: a tip free of attachment to other blades and urged into extended...
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3637324 |
VEHICLE PROPULSION-ASSISTING SYSTEMS
A system for increasing propulsive effectiveness of wheeled vehicles in fluid or soft solid media by pneumatically varying the characteristics of one or more driving wheels. The contour of the...
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3594096 |
COMBINED CARRYING AND DRIVING DEVICE FOR WATERCRAFTS
A marine craft having frame means and rotary means rotatably supported on the frame means for propelling and providing the sole buoyant support for the marine craft. The rotary means includes a...
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3559923 |
CRASH-RESISTANT HELICOPTER
A strong, slightly heavier than air helicopter or like vehicle having: hinged, resilient lifting-propeller blades comprising gas-inflated tubes; a substantially rigid cabin comprising...
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3405765 |
Ship's propeller mounting
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3384183 |
Inflatable vane
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3381650 |
Amphibious vehicle having the driving and floating screw rotors on its both sides
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3353610 |
Liquid film maintaining apparatus
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3256850 |
Watercraft propulsion means
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3233574 |
Buoyancy device for a water surface craft
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3221702 |
Undulating surface driving system
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3209719 |
Surface propelling system
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3158338 |
Sustaining airfoils having variable configurations to vary lift characteristics
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3154043 |
Hydrodynamic travelling wave propulsion apparatus
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3064284 |
Oar structure
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3059255 |
Oars
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2994516 |
Fluid agitating device
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2974627 |
Low-speed marine propulsion unit
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