| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 416176000 | SPIRAL BLADE OR FLOW PASSAGE (360 DEGREE) | 22 |
| 20080273977 | Methods and Devices for Utilizing Flowing Power - A method and apparatus related to the utilization of flowing medium is provided including a turbine blade comprising at least one protrusion along at least a portion of a surface of said blade and a twisted portion. | 11-06-2008 |
| 20080279690 | WIND HARNESSING SYSTEM - A wind harnessing system comprises a substantially grooved shell disposed about a rigid frame. The grooved shell can be constructed of lightweight shell panels connected to one another and to the frame. Alternatively, the grooved shell can be constructed of inflatable shell sections. | 11-13-2008 |
| 20090129928 | High efficiency turbine and method of generating power - The present invention is directed to a turbine comprising a plurality of blades that rotate in a single direction when exposed to fluid flow, wherein the plurality of blades are joined to the central shaft by a plurality of radial spokes disposed substantially perpendicular to the central shaft such that the rotating plurality of blades causes the shaft to rotate. The plurality of blades has a uniform airfoil-shaped cross section, where the airfoil cross section presents a non-zero angle of attack to the current. The plurality of blades wind in a spiral trajectory, rotating around the central shaft and having a variable radius along the length of the central shaft such that a distance measured from the plurality of blades to the center shaft is greater near the center of the turbine than at either end. | 05-21-2009 |
| 20100278650 | WIND TURBINE BLADE ASSEMBLY AND APPARATUS - In one aspect, a wind turbine blade assembly includes a central shaft defining an axis of rotation and a plurality of helically twisted blades supported on the central shaft. The helically twisted blades have an inner edge and an outer edge, and at least a portion of the helically twisted blades is radially spaced apart from the central shaft. In another aspect, a wind turbine apparatus employing the wind turbine blade assembly is provided. | 11-04-2010 |
| 20100322770 | TURBINE BLADE CONSTRUCTIONS PARTICULAR USEFUL IN VERTICAL-AXIS WIND TURBINES - A turbine blade particularly useful in a vertical-axis wind turbine, characterized in that the blade includes a central region of a symmetrical airfoil configuration, and opposite end regions of a non-symmetrical airfoil configuration effective to increase the drag forces produced by the wind at the end regions when the turbine blade is used in a vertical-axis wind turbine provide a self-starting capability, and a speed-limiting capability, to the wind turbine. In one described embodiment, the non-symmetry in the sharp trailing edge of the blade is produced by a deep recess extending inwardly past the chord line of the blade to enhance the self-starting and speed-limiting capabilities; whereas in another described embodiment, the non-symmetry is produced by a shallow recess and outwardly-flared ends enhancing the efficiency of the wind turbine during normal wind conditions. | 12-23-2010 |
| 20110027087 | Transverse-Axis Turbine With Twisted Foils - A turbine, suitable for use as a water or wind turbine, for generating rotary motion from fluid flow wherein the axis of rotation of the turbine is transverse to the direction of flow. The turbine has two foils, which may meet at the axis of rotation, and the turbine is helical and tapered. The turbine has a quasi-conical base. The non-mount end of the turbine is preferably tilted downstream with the turbine axis of rotation in the range of about 5° to 15° from perpendicular to the flow direction. | 02-03-2011 |
| 20110081244 | Spiral design - New design of wind and or water mill, which utilizes natural motion to create electricity. Using a spiral shape design compared to the traditional wind and or water mill designs already in use today. Using a spiral shape design with a tapering angled blade and or size and or a guide, the blades should allow for less drag and increase wind and or water spiral affect efficiency. And the Spiral Design can also be used to replace traditional propellors, efficiently utilizing the motion for thrust. | 04-07-2011 |
| 20110085910 | Rotor-type Super Windmill and Method of Increasing Kinetic Energy of Air Flow - Rotor-type super windmill based on logarithmic spiral-shaped load-bearing elements represents a single block of two vertical rotors having inverted curvature of load-bearing elements producing in the rotary mode in the inter rotor space circulation of velocity of both rotors in one direction and ensuring summation thereof with the velocity of the air flow. | 04-14-2011 |
| 20110200437 | TURBINE AND A ROTOR FOR A TURBINE - A water powered turbine ( | 08-18-2011 |
| 20110255975 | TURBINES - The invention generally relates to turbines that efficiently process air or fluid flow while producing substantially no vibrational effects. In certain embodiments, the invention provides a turbine including a rotatable shaft, and at least one blade connected to the rotatable shaft, in which the blade includes a helical shape and an angle of about 180° or greater. | 10-20-2011 |
| 20110311363 | VORTEX PROPELLER - The invention discloses at least one blade extending away from a beginning point and longitudinally along a central axis and approximating the shape of a spiral about said central axis. The blade comprises a beginning point disposed a first lateral distance away from the central axis and a terminating point disposed a second lateral distance away from the central axis, the second distance being greater than the first distance. | 12-22-2011 |
| 20120070293 | Wind turbine apparatus, wind turbine system and methods of making and using the same - An electricity-generating Savonius-type wind turbine apparatus has a pair of blades configured helically around a central axis. The wind turbine apparatus is modular and sectional such that each section includes a pair of blades useful for being pushed by wind to generate electricity via an attached electrical generator. Further, a series of modular wind turbine sections generates electrically via an attached electrical generator. The wind turbine apparatus further includes one or more airfoils attached to an axis of rotation for aiding in the rotation of the central axis for generating electricity. | 03-22-2012 |
| 20120076656 | Horizontal Axis Logarithmic Spiral Fluid Turbine - The present invention is a more simplified and efficient design of a turbine. The use of a logarithmic curve pattern for blade design and an aerodynamic profile allows the present invention to not only be versatile in its uses, but also much more efficient at gathering forms of energy for different purposes. | 03-29-2012 |
| 20120156041 | VERTICAL AXIS TURBINE - A vertical axis turbine and method of making same is disclosed. The device and method comprise a plurality of blades rotatably disposed around an axis of rotation at a plurality of blade locations, each blade being twisted at a first angle about its longitudinal axis, each blade having its distal ends located a predetermined distance from the axis of rotation, each blade being bent at one or more central locations along the longitudinal axis so the one or more central locations are the same predetermined distance from the axis of rotation as the distal ends, each blade having a foil cross section perpendicular to the axis of rotation for maintaining unidirectional rotation of that blade about the axis of rotation in a fluid flow, and each blade having its longitudinal axis tilted at a second angle with respect to the axis of rotation. | 06-21-2012 |
| 20130177424 | SCREW TURBINE AND METHOD OF POWER GENERATION - A screw turbine comprising a helical turbine blade mounted for axial rotation, a mount associated with the helical turbine blade and mounting the helical turbine blade for axial rotation, and a generator associated with the helical turbine blade which converts energy imparted to the helical turbine blade to electricity, wherein the diameter of the helical turbine blade is less than the lead of the helical turbine blade and wherein said screw turbine is adapted to permit lateral exchange of fluid in use. | 07-11-2013 |
| 20130343891 | SPIRAL SCREW FLUID TURBINE HAVING AXIAL VOID - A spiral turbine includes an axle configured to rotate and one or more spiral blades coupled to the axle by one or more support connections. Each spiral blade is formed around and outside of a conical inner space which is coaxial with the axle. | 12-26-2013 |
| 20150098827 | Device for Connecting a Centerless Auger to a Rotatable Member - An auger assembly according to one example embodiment includes an auger having a helical flight extending along a longitudinal axis. The auger has a central opening running along the longitudinal axis. The auger has an end that includes at least a portion of a turn having substantially zero pitch. A retaining member has a body including a groove on an outer surface of the body. The groove has a shape complementary to the helical flight at the end of the auger. At least a portion of the end of the auger is retained within the groove. A rotatable coupling member extends along the longitudinal axis. At least a portion of the rotatable coupling member is positioned within the central opening of the auger and presses the outer surface of the retaining member against an inner diameter of the end of the auger. | 04-09-2015 |
| 20150098828 | WINDTURBINE AND BUILDING HAVING SUCH A WIND TURBINE - Wind turbine ( | 04-09-2015 |
| 20160160650 | END SUPPORTED HELICAL TURBINE - The claimed invention relates to a turbine adapted to extract energy from the velocity of a streaming fluid such as wind, steam, tidal streams and water waves. The invented turbine is arranged with its axis of turbine rotation directed at substantially right angles to the current direction of the streaming fluid and comprising a kind of self-supported blade body which is rotationally symmetric and constructed by rotor blades integrated transversely and supported two by two, allowing the fluid to flow through the turbine with less turbulence compared to other types of turbines equipped with separate rotor blades. | 06-09-2016 |
| 416177000 | Flow confining casing, shroud or passage | 3 |
| 20110255976 | Manufacturing method for closed vane wheels - In a manufacturing method for closed vane wheels having vanes ( | 10-20-2011 |
| 20130236314 | PORTABLE HYDROELECTRIC KINETIC ENERGY CONVERSION DEVICE - Disclosed herein is a crosscurrent tacking portable hydrokinetic energy conversion hydrofoil useful for generating electricity in moderate velocity currents and especially useful for rapid deployment and removal from a land base, boat or dock. The device comprises a buoyant and ballasted semi-cylindrical shroud containing a turbine rotor, annular cylindrical wing, a linear expansion nozzle, an alternator with linkages to a turbine shaft, an insulated conductor cable and tether lines. Hydrofoil elements enable the device to tack into a stream and hold a stable position. A system using two tether lines, each with one end connected to the device are fed into a stream to a desired distance from a surface base and are subsequently individually tensioned and fixed to a point on the base, stabilizing the device. | 09-12-2013 |
| 20140050585 | IMPELLER, ROTARY MACHINE INCLUDING THE SAME, AND METHOD FOR MANUFACTURING IMPELLER - An impeller including: blades disposed in a circumferential direction of the impeller; a disk located close to a second end side of an axis of the impeller with respect to the blades, to which the blades are attached, and configured to be attached to a rotating shaft; and a shroud located close to a first end side of an axis of the impeller with respect to the blades, and to which the blades are attached. Flow passages are formed by the blades, the disk and the shroud. The blades, the shroud and a first portion of the disk close to the second end side of the axis of the impeller are integrated so as to form a first member. A second portion of the disk close to the first end side of the axis of the impeller forms a second member. | 02-20-2014 |
