| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 416017000 | Feathering cycle related to flow direction | 11 |
| 20080304963 | Tilting flaps to drive wind power generators or gearboxes - In order to use wind energy to drive a wind power generator or gearbox we usually use a certain sort of propeller rotates in a plane perpendicular to the wind direction. The “Tilting flap” is a new means to be used to achieve the same task but in more efficient manner, the arrangement of the “Tilting flaps” differs than the propeller unit in two ways. It rotates in a plane parallel to the wind direction. Its “Flaps” change their positions during the rotational movement to face the blowing wind currents wherever are these changes are required to gain the optimum use of the wind energy. | 12-11-2008 |
| 20100111694 | AEROGENERATOR HAVING MEANS FOR MAINTAINING VANE UNIT HORIZONTAL - Disclosed herein is an aerogenerator having a horizontal maintaining means. The aerogenerator of the present invention includes a support pillar which is placed upright on the ground and has a hollow space therein. The aerogenerator further includes a rotational support unit which is provided on the upper end of the support pillar so as to be rotatable. The rotational support unit includes a rotational body and a rotational support base which supports the lower end of the rotational body. The opposite ends of the rotational support base extend predetermined lengths from the rotational body outwards. The aerogenerator further includes vane units which include a main vane and a subsidiary vane provided on the respective opposite ends of the rotational support base of the rotational support unit. The main vane and the subsidiary vane have different weights. The aerogenerator further includes a generating unit which converts the rotating force of the vane units into electric energy, a rotating force transmission unit which transmits the rotating force of the vane units to the generating unit, and the horizontal maintaining means which connects the vane units to the rotational body to maintain central axes of rotating shafts of the vane units horizontal. | 05-06-2010 |
| 20110135471 | Wind Turbine - A wind turbine has a plurality of feathering blades and a governor for controlling the pitch angle of the blades according to the speed of rotation of the turbine. An elastic linkage connects between the governor and the blades. The linkage urges the blades toward the pitch position set by the governor. The linkage allows pitching of the blades toward a more feathered position than a position set by the governor against the elastic return force. The linkage does not allow substantial pitching of the blades to a less feathered position than the position set by the governor, lne centrifugal governor sets the minimum pitch angle of the blades, but the blades can react immediately to additional wind pressure by self feathering against the urging of the elastic linkage. | 06-09-2011 |
| 20120121414 | Flow Driven Engine - A system for converting between fluid movement, such as wind, and mechanical rotation is disclosed. The system includes a support which is rotatable about a first axis orthogonal to the direction of fluid movement and at least one panel mounted on the support for rotation about a said axis. The panel includes a matrix of flaps (elementary panels) mounted on the panel framework for rotation about a multiple secondary axes; and retaining hardware serving to resist rotation of the said flaps during a first portion of the rotation cycle of the support and permitting the flaps to rotate freely during a second portion of said cycle. The panel provides a driving torque during said first portion of the cycle and moving freely to an orientation of minimum fluid resistance during said second portion. | 05-17-2012 |
| 20120171035 | LEVERAGE-MAXIMIZING VERTICAL AXIS RECIPROCATING BLADE HYDRO POWER GENERATOR - The present invention relates in general to the field of hydropower devices using a reciprocating or oscillating blade system. It aims at utilizing the currents of oceans and seas and rivers to generate electricity. Its distinguishing design makes it possible to realize a leverage factor, much larger than existing devices using a reciprocating or oscillating blade system, and by this it will introduce leverage as a main characteristic for harnessing the power of relatively slow river and ocean currents by devices using a reciprocating or oscillating blade system. | 07-05-2012 |
| 20120301297 | Fluid turbine device for power generation - A vertical axis, fluid turbine device comprises a turbine rotor with a rotatable, central shaft and three to six, equally spaced rotor vane sections connected to the central shaft with adjacent vane sections connected to one another in a framework. This framework rotates about the central shaft with the directional passage of fluid, typically wind, therethrough. Each vane section consists of: a rectangular frame with at least two connections to the central shaft; an elongate hinge section extending substantially parallel to the central shaft and connected to the rectangular frame with two or more rotatable bearings; and a vane panel connected to the hinge section for rotating about the rectangular frame and up to about 180 degrees away from an end of the rectangular frame closest to the central shaft with passage of wind through the framework and with rotation of the rectangular frame about the central shaft. Most preferably, a crossbar extends between opposed sides of the rectangular frame for preventing over-rotation of the vane panel through its frame. | 11-29-2012 |
| 20130028737 | Adjustable wind turbine generating device - A wind turbine includes a nacelle supported on top of a tower and having a chamber for receiving a coil, a spindle rotatably and slidably engaged in the nacelle and having one end extendible out of the nacelle, a rotator blade device mounted onto the spindle, a rotor attached to the spindle and movable relative to the coil, and a spring biasing member for moving the rotor relative to the coil, and the rotator blade device is movable toward the nacelle with a head wind, and the rotor is movable relative to the coil to adjust a torque between the coil and the rotor when the spindle and the rotor are moved relative to the coil with the rotator blade device, and the rotator blade device is movable away from the nacelle with the spring biasing member. | 01-31-2013 |
| 20130129509 | VERTICAL AXIS WIND TURBINE - A vertical axis wind turbine with blades which articulate to reduce drag when they are moving upwind and which are suitable for use in small scale electrical generators. The turbine has blades which are rotatable about a blade axis of rotation and the blade axis is rotatable about a turbine axis of rotation. A vane is coupled to the blade axis of rotation to change the orientation of the blades in response to changes in wind direction. The vane maximizes the effect of the wind on the one or more blade by adjusting the blade position to maximize the blade surface area facing into the wind when the blade is moving downwind and to minimize the blade surface area facing into the wind when the blade is moving upwind. | 05-23-2013 |
| 20140241882 | SYSTEMS FOR MINIMIZING YAW TORQUE NEEDED TO CONTROL POWER OUTPUT IN TWO-BLADED, TEETERING HINGE WIND TURBINES THAT CONTROL POWER OUTPUT BY YAWING - Systems and methods for increasing operational efficiency of wind turbines, especially offshore wind turbines. The invention discloses systems and methods for reducing the torque needed to rotate a rotor shaft axis with respect to the wind direction. Systems and methods for controlling the rotational speed of the rotor shaft axis are also disclosed. | 08-28-2014 |
| 20140322012 | Flow Driven Engine - A system for converting between fluid movement, such as wind, and mechanical rotation is disclosed. The system includes a support which is rotatable about a first axis orthogonal to the direction of fluid movement and at least one panel mounted on the support for rotation about a said axis. The panel includes a matrix of flaps (elementary panels) mounted on the panel framework for rotation about a multiple secondary axes; and retaining hardware serving to resist rotation of the said flaps during a first portion of the rotation cycle of the support and permitting the flaps to rotate freely during a second portion of said cycle. The panel provides a driving torque during said first portion of the cycle and moving freely to an orientation of minimum fluid resistance during said second portion. | 10-30-2014 |
| 20150292481 | VERTICAL AXIS TURBINE - A vertical axis wind turbine ( | 10-15-2015 |
