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8133023 |
Wind turbine with variable area propeller blades
An apparatus and method for reducing wind turbine damage includes a propeller having a plurality of blades projecting radially from a hub. The blades may be adjustably combined to form variable...
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8122586 |
Method for connecting a tension-torsion strap
A method for connecting a tension-torsion strap. The method includes sliding a sleeve into an arm of a hub; aligning holes in the sleeve with holes in the hub; installing a bushing in each aligned...
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8055390 |
Controller for a blade adjustment angle of at least one rotor blade of a wind power plant
Controller for a blade adjustment angle for at least one rotor blade of a wind power plant, in which a first controller branch is switched for the determination of the blade adjustment angle...
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7997864 |
Blade arm
A user adjustable variable axial length and variable pitch ceiling fan blade arm. The blade arm includes a pair of extension elements. Each element is threadably engaged with each other. At the...
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7956482 |
Speed controlled pitch system
The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a controller and a first drive system for adjusting a pitch angle of the...
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7914258 |
Fluid mechanical converter
The present teachings relate to a fluid mechanical converter having at least one energy-accumulator mass system that can be powered by a power drive. To provide a fluid mechanical converter, which...
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7632070 |
Telescoping wind turbine blade
A wind turbine blade made of a fixed blade section with an integral mounting flange for attachment to a wind turbine hub. A moveable blade section is attached to the fixed blade section and is free...
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7186083 |
Wind energy conversion device
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...
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7131812 |
Sky turbine that is mounted on a city
A sky turbine, having impeller blades with a plurality of panels that can telescope inward and outward. The pitch of the panels can be adjusted, and the pitch of each panel on a blade, passing from...
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6972498 |
Variable diameter wind turbine rotor blades
A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by...
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6923622 |
Mechanism for extendable rotor blades for power generating wind and ocean current turbines and means for counter-balancing the extendable rotor blade
A power generating system wherein a turbine is mounted on top of a tower or tethered underwater. The turbine includes a rotor having a main blade section connected to a rotor hub and an extender...
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6910873 |
Self regulating rotor
A machine that is a self regulating rotor with a set of cups or vanes that are pivotally attached about a central axis such that they form a closed three dimensional shape when closed, and when...
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6752595 |
Propeller type windmill for power generation
A plurality of wind turbine blades (3) are distributed equiangularly within a plane perpendicular to a horizontal rotating shaft (2) and around a hub (1) provided on the horizontal rotating shaft...
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6726439 |
Retractable rotor blades for power generating wind and ocean current turbines and means for operating below set rotor torque limits
A wind or water flow energy converter comprising a wind or water flow actuated rotor assembly. The rotor comprises a plurality of blades, wherein the blades of are variable in length to provide a...
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6655915 |
Drive system for the retraction/extension of variable diameter rotor systems
A drive system for a variable diameter rotor (VDR) system includes a plurality of rotor blade assemblies with inner and outer rotor blade segments. The outer blade segment being telescopically...
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6113350 |
Vertical-axle power machine
A vertical-axle wind power machine comprises a vertical axle, a plurality of jointed radial arms, a plurality of counterbalanced oblique blades at the support points thereof, a friction-rewarding...
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6030177 |
Drive system for a variable diameter tilt rotor
A drive system for a variable diameter rotor system that includes a plurality of rotor blade assemblies with inner and outer blade segments. The outer blade segment being telescopically mounted to...
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6019578 |
Variable diameter rotor blade actuation system
A rotor blade actuation system is disclosed for controlling extension and retraction of an outboard blade section of a rotor blade by varying the speed and direction of rotation between a main...
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5810561 |
Variable pitch propeller apparatus
A variable pitch propeller apparatus for use with a motor is disclosed. The apparatus includes a housing having a plurality of blades mounted therein for rotation. Adjustable high pitch and low...
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5735670 |
Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise
A Variable Diameter Rotor (VDR) system (4) having telescoping odd and even blade assemblies (Ob, Eb) wherein the odd blade assemblies define a radial length RO and the even blade assemblies define...
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5655879 |
Mounting arrangement for variable diameter rotor blade assemblies
A mounting arrangement (100) for a Variable Diameter Rotor blade assembly (16) having an outer blade segment telescopically mounting to a torque tube member (24), and connecting means (70) for...
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5636969 |
Torque tube/spar assembly for variable diameter helicopter rotors
A torque tube/spar assembly (100) for transferring operational loads of a Variable Diameter Rotor blade assembly (16) to a rotor hub assembly (18) and includes a torque tube member (24), a spar...
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5630705 |
Rotor construction for windmill
A device for converting wind flow energy into mechanical energy has a base construction and a rotor with an essentially horizontal axis mounted on the base construction. The rotor has a number of...
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5620304 |
Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise
A Variable Diameter Rotor (VDR) system (4) having telescoping odd and even blade assemblies (Ob, Eb) wherein the odd blade assemblies define a radial length RO and the even blade assemblies define...
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5527153 |
Variable pitch propeller
A variable pitch propeller assembly is disclosed for a power boat. Three blades are mounted on a housing carried by the propeller shaft. Each blade has an axle received in the housing. Each axle...
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5326223 |
Automatic variable pitch marine propeller with mechanical holding means
There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a...
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5299912 |
Drive system for changing the diameter of a variable diameter rotor
A drive system for varying the diameter of a variable diameter rotor has a gear drive system associated with a single coaxial shaft lower end which includes a gear set for increasing or decreasing...
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5286166 |
Automatic centrifugal force variable pitch propeller
An automatic centrifugal force variable pitch propeller assembly includes a plurality of propeller blades mounted within a housing, each of the propeller blades being mounted to permit limited...
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5253979 |
Variable diameter rotor having an offset twist
A variable diameter rotor for a tilt rotor aircraft has an inboard section having a linear twist from a root end to an outboard end thereof, and an outboard section telescoped over the inboard...
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5240374 |
Damped automatic variable pitch marine propeller
There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a...
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5022820 |
Variable pitch propeller
An automatic variable pitch propeller including a central hub defining an axis of propeller rotation and a plurality of blades connected to and extending from the central hub substantially normal...
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4978286 |
Variable cycle engine passive mechanism
A mechanism for varying the cycle of a power plant comprising a turbine ene having a housing connected to the rotating spool of the turbine engine with a plurality of propeller blades slideably...
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4948337 |
Aircraft engine propulsor blade pitch sensing
Pitch of a blade (12) on an aircraft engine propulsor (14) is determined by employing a shaft (22) and a bevel gear (23) to alter relative circumferential distance between a first set of teeth (25)...
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4948339 |
Propeller blade counterweight
The invention concerns a system for reducing the resisting torque which must be overcome in changing pitch of aircraft propeller blades. The resisting torque includes gas twisting moment and...
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4915586 |
Propfan blade attachment
A blade attachment between a propfan blade and a propfan hub in a propfan propulsion system for a tube-launched expendable aircraft, the attachment including a hinger on a rotatable propfan hub on...
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4909703 |
Motion damping apparatus for wind driven propellers
A multi-blade, variable pitch wind driven propeller in which a shock absorber is connected with each blade to dampen movement in both the radially inward and radially outward movements of the...
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4867642 |
Wind mill wing with air brake
By mounting an axle (18,19) in a wind mill wing (1) having a wing tip (22) capable of swinging out by means of a mounting (2,7,8) which may be bolted to the wing and which can furthermore squeeze...
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4801243 |
Adjustable diameter screw propeller
An adjustable diameter screw propeller includes a hub having a plurality of spindles, each mounted in the hub for rotation about an axis disposed radially of the hub axis and a mechanism for...
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4776761 |
Articulated blades ceiling fan-lamps combination
A ceiling fan is provided and includes articulated fan blades such that when the fan is off the blades will hang vertically downwardly by force of gravity and when the fan is turned on the blades...
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4717312 |
Variable-pitch bladed rotors
A variable-pitch bladed rotor including a plurality of blades extending outwardly from a hub in which they are each mounted by a respective ball-screw device. Each device comprises inner and outer...
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4634341 |
Axial flow fans
There is disclosed an axial flow fan having blades which may be rotated about their axes to permit their pitches to be adjusted and which may be moved in a radial direction to adjust the clearance...
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4575309 |
Wind turbines
A wind turbine having the tips of the blades pivotable to a position in which they act as brakes to slow the turbine down. The pivoting is caused by relative axial movement of the tip and main...
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4495423 |
Wind energy conversion system
A wind powered device on a support structure is provided with a drive shaft mounted for rotation about its axis on the support structure and is coupled to an electric generator connected to a...
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4385871 |
Wind driven air pump
An improved pump for lifting water from an underground source utilizes a wind motor for driving an oil-less air compressor eliminating oil contamination of ground water which is forced to the...
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4374631 |
Windmill speed limiting system utilizing hysteresis
A windmill speed limiting device is provided to prevent the windmill blades from going too fast during conditions of heavy winds. In order to slow down the windmill blades, the tips of the blades...
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4285637 |
Propeller assembly
A propeller assembly is provided in which the propeller blades are adjustable both rotatably and longitudinally. Pitch angle of the propeller blades may be adjusted by rotating the blades in the...
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4257736 |
Governed propeller type wind motor arrangement
A propeller type wind motor arrangement having a blade mounting hub, a plurality of air foil blades, and blade receiving means for mounting the blades to the hub for pivotal movement about a...
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4137010 |
Constant lift rotor for a heavier than air craft
A rotor blade extended radially from a hub, characterized by an elongated spar and a plurality of axially aligned shells pivotally mounted on the spar, each having an aerodynamic center located in...
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4080097 |
Locking control and overtravel safety stop system for variable length rotor blades
A locking control system and an overtravel safety top system are presented for a variable length rotor blade system. The lock system has linkage and pawl apparatus operated by a pilot actuated lock...
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4074952 |
Locking control and overtravel safety stop system for variable length rotor blades
A locking control system and an overtravel safety stop system are presented for a variable length rotor blade system. The lock system has a lock mechanism operated by a pilot actuated lock shaft to...
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