Matches 1 - 50 out of 79 1 2 >


Match Document Document Title
8992163 Expandable impeller pump  
An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades...
8662846 Bidirectional fan having self-adjusting vane  
A bidirectional centrifugal fan having a self-adjusting vane. In one embodiment, the fan includes a driving disc having a pivot pin extending therefrom; a vane pivotably attached to the pivot pin,...
8444382 Rotor hub for use with high-inertia blades  
A rotor hub has a yoke with radial arms allowing flapping of connected blades about a flap axis. A grip is rigidly attached to each blade, and a lead-lag bearing connects each grip to one of the...
8439859 Catheter device  
The catheter device comprises a drive shaft connected to a motor, and a rotor mounted on the drive shaft at the distal end section. The rotor has a frame structure which is formed by a screw-like...
8430636 Wind turbine rotor assembly  
A rotor assembly for a wind turbine including at least one blade adapted to automatically adjust its shape as a function of rotational speed to create an efficient fluid dynamic profile over a...
8337159 Airfoils with automatic pitch control  
An airfoil arranged for use in a fluid flow of varying direction relative to the airfoil, has arranged thereon a plural axis hinge for automatic adjustment of the angle of pitch of the airfoil....
8322928 Pitch bearing for wind turbine rotor blades  
A pitch bearing for a wind turbine rotor comprises a rotor hub and at least one rotor blade, the pitch bearing comprising a cylindrical inner bearing ring connectable to a rotor blade of the wind...
8282353 Bearing unit for a long rotor blade of a wind power installation, wind power installation comprising one such rotor blade bearing arrangement, and method for operating one such wind power installation  
The invention relates to a bearing unit for a long rotor blade, especially a wind power installation, said bearing unit comprising two annular elements that can be rotated in relation to each...
8143740 Apparatus for storing and using wind energy  
An apparatus for storing and using wind energy has a hub, blades extending radially outwardly from the hub, a shaft interconnected to the hub, a generator connected to the shaft, a first coupler...
8133026 Fixed horizontal axis-mounted wind turbine blade with an independently rotating pressure cambered fin  
A fixed horizontal axis-mounted wind turbine blade impelled by an independently rotating, pressure cambered fin includes a wind turbine blade comprised of a solid, rigid leading edge and trailing...
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...
8087890 Turboprop having a propeller made up of variable-pitch blades  
A turboprop having a set of variable-pitch rotary blades constrained to rotate with a rotary support. In order to vary its pitch, each blade of said set is coupled to a specific hydraulic actuator...
8021114 Self-adjusting wind turbine generator blade  
A self-adjusting blade for wind turbine generator or windmill will change width of blades according to wind speed to optimize efficiency. The windmill comprises a brace, rib tubes, cylinders,...
7980823 Wind turbine generator rotor, wind turbine generator and wind turbine generator system  
Provided is a wind power generating apparatus adopts a rotor blade including a frame body unit composed of a frame body having an opening and a plurality of support frames extending from the frame...
7918646 High efficiency turbine with variable attack angle foils  
A high-efficiency turbine generates energy from a fluid flow, such as wind or water currents. The turbine has a central axis with a plurality of foils rotatable about the central axis in a general...
7850429 Helicopter rotor  
There is described a rotor for a helicopter, having a hub rotating about a first axis; a number of blades projecting from the hub in respective longitudinal directions lying in a plane crosswise...
7832101 Method and assembly for mounting rotor blade bearings of a wind turbine  
A method and an assembly for fastening at least one screw nut to be tightened of a rotor blade bearing of a wind turbine are provided. A screw nut driver assembly is provided at a rotatable...
7425117 System and method for reducing back flow  
A system and method of reducing back flow in an air mover having one or more blades is described. A flap is attached to a blade of the air mover such that, when back flow occurs, the flap obscures...
7384240 Composite blade  
A composite blade (26) comprises a root portion (36) and an aerofoil portion (38). The aerofoil portion (38) has a tip (42), a chord (C), a leading edge (44), a trailing edge (46), a suction...
7311496 Apparatus and method for generating electric energy in a fluid environment  
Apparatus for generating electrical energy in a fluid environment, the apparatus including a wing member for disposition in the fluid and pivotally movable about an axis in response to flow of the...
6699013 Forced air cooling fan having pivotal fan blades for unidirectional air flow  
The forced air cooling fan comprises a flat disk surface having a series of circumferentially spaced apertures each including a V-shaped fan blade connected across the aperture perpendicular to...
6641365 Optimum speed tilt rotor  
A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per...
6371726 Foldable propeller  
A foldable propeller for a ship having a hub (2) for mounting on a drive shaft of the ship, and at least two skew-type blades (1), each of which is pivotably arranged in the hub (2) for...
6227803 Apparatus for generating electric power using wind force  
An apparatus for generating electric power using wind force which is capable of generating good quality electric power by combining the apparatus with the inventor's water wave force-based...
6200098 Speed limited fan  
The invention provides a method of driving a plurality of plastic fan blades (14) integrally molded with a band (16) about and engaging a metal driving hub (12) at an interface by rotating the fan...
5895015 Automatic flap  
An automatic flap that uses on each wing two adjacent fins, one of which is smaller and is located on the middle or front of the wing, the other, which is larger, on the bottom rear of the wing,...
5877566 Submersible magnetic motor having improved rotary blades  
A submersible magnetic motor having improved rotary blades comprising a magnetic motor body, a magnetic rotor and a rotary impeller wherein the rotary impeller comprises a rotary hub provided with...
5573373 Propellar having optimum efficiency in forward and rewarded navigation  
A propeller in particular for a ship has blades each of which is pivotally arranged in the hub of the propeller so that the blade is capable of pivoting to and fro in an axial plane between...
5554003 Controllable pitch propeller for propulsor and hydroturbine  
A controllable pitch propeller for application principally to sailboats employing electric auxiliary power. The design addresses a highly efficient approach to performing four basic functions...
5518367 Cross-wind-axis wind turbine  
A mechanical device which converts the wind energy into rotational mechanical energy has a cross-wind-axis rotor structure, having multiple, orientable blades around its periphery, mounted...
5511947 Cyclic pitch control having torsion spring system  
A pitch control system for a vertically launchable and recoverable winged aircraft includes a collective and cyclic pitch control system, a drive yoke and a rotor hub. The collective and cyclic...
5445497 Variable pitch propellers  
A variable pitch propeller primarily for marine use which includes a hub for mounting on a driven shaft. The hub has a plurality of blades which are mounted to bearing rings which are carried in...
5326167 Laboratory flask stirrer assembly attachable with a nut and bolt  
A stirring system for stirring contents in a laboratory flask having a round or spherical bottom and a reduced neck includes a stirrer shaft manufactured with a ring at the lower end thereof which...
5297933 Cantilever paddlewheel apparatus  
This invention is a paddlewheel apparatus having an epicyclic gear train in a rotatable holder at an end of a plurality of cantilevered paddles. The paddles are maintained substantially vertical...
5284420 Plastics multi-blade variable-pitch rotor  
A multi-blade rotor (1), especially for a helicopter rear anti-couple propeller, includes a hub body (3) to which are connected twistable straps (11 to 17) each formed by two bundles (20) of...
5259729 Propeller blade tip path plane inclining device  
A propeller blade tip path plane-inclining device which is provided with a fuselage, a propeller including a center piece rotating unitary with a rotation shaft in association therewith and a...
5228834 Hub structure for a rotary wing aircraft  
A bearingless hub structure for a rotary-wing aircraft is provided, the structure including a hub body adapted to be securely connected to a rotor mast, a plurality of flexible beam members...
5203672 Wind turbine with stationary vertical support tower and airflow-directing shell  
A wind turbine with a stationary tower and a set of turbine blades rotatably attached to the top and bottom of the tower. A set of upper and lower braces connects the turbine blades to prevent any...
5195872 Paddlewheel apparatus  
This invention is a paddlewheel apparatus having epicyclic gear trains in rotatable holders at opposite ends of a plurality of paddles. The paddles are maintained substantially vertical throughout...
5120195 Clevis joint capable of accommodating substantial pivotal motion between its joined members and loading along its axis  
An improved clevis joint capable of withstanding substantial pivotal motion between its joined members and loading along its axis. An improved clevis joint wherein the parts joined thereby are...
5102300 Pinned airfoil propeller assembly  
A propeller or fan blade is rotatably mounted to a blade retention pitch member by a pin radially outside of a spinner. By mounting the propeller blade for rotation about the axis of the pin, the...
5028209 Wind power plant construction  
A wind power plant construction includes a turbine with at least two blades, a shaft, and blade angle control apparatus. According to the wind power plant construction shown, supports are rigidly...
5007799 Flapping restrainer device for rotorcraft rotor blades, and rotor head comprising said device  
The invention relates to a flapping restrainer device for the blades of a rotorcraft main rotor, and a rotor head comprising the same. The lower restrainers comprise a reciprocal star-shaped plate...
4932838 Fluid apparatus  
A fluid apparatus comprising a motor, a blade wheel connected to the motor shaft, plural moving blades disposed along the outer circumference of the blade wheel with each moving blade shaft...
4846261 Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds  
The present invention relates to a heat exchange machine for removing the excess of the heat during the summer period and the excess of humidity during the cold period. The machine comprises two...
4789305 Self-feathering rotary wing  
A controllable lifting rotary wing for an aircraft wherein each rotor blade is mounted in such a manner that it has freedom to oscillate in pitch about its feathering axis. The aerodynamic center...
4737074 Wear resistant hub for wind machines  
A one piece fan blade for a wind machine is sandwiched between a hub and a plate, the fan blade and the hub and is secured thereto by a teeter pin extending through the bore from opposed...
4693671 Reversible self-adjusting propeller device  
A self-adjusting propeller device having a control blade and a thrust blade connected together in nondiametrical relation and pivotally mounted on a hub for rotation about a hub axis. In response...
4640668 Ceiling fan with adjustable blowing scope thru a speed-servo and with driving speed control means  
A ceiling fan with adjustable blades and equipped with a motor including a centrifugally controlled motor speed control. The motor speed control includes an adjustable, centrifugally controlled...
4595337 Hub for wind machines  
A one piece fan blade for a wind machine is sandwiched between a hub and a plate. A rotatable shaft penetrably engages a bore extending through the plate, the fan blade and the hub and is secured...

Matches 1 - 50 out of 79 1 2 >