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| Number | Title | Issue Date |
| 7841831 | Asymmetrically changing rotating blade shape (ACRBS) propeller and its airplane and wind turbine applications A propeller includes a plurality of propeller blades. Each blade has an adjustable drag coefficient. A plurality of actuators adjusts the drag coefficients of the propeller blades. A controlling unit controls the plurality of actuators such that the drag coefficient... | 11/30/2010 |
| 7413404 | Sail wing type windmill A sail wing type windmill includes an output shaft erected vertically, a foundation with a bearing disposed in the center hole provided therein for supporting the output shaft; an axle body with a roller bearing on the top end, while the bottom end thereof being con... | 08/19/2008 |
| 7235893 | Reduced friction wind turbine apparatus and method The present invention is a wind power apparatus for driving an electric generator. The wind power apparatus comprises a frame, a vertical axle mounted on the frame and a buoyant hull. The buoyant hull is rotational disposed on the axle. The buoyant hull has a curvil... | 06/26/2007 |
| 7162876 | Ejector for cooling air supply pressure optimization A system for optimizing cooling air supply pressure includes a high pressure fluid source which receives bleed air from the exit of a high pressure compressor and a nozzle and ejector assembly for supplying fluid to a point of use at a pressure sufficient to maintai... | 01/16/2007 |
| 6896475 | Fluidic actuation for improved diffuser performance A diffuser includes an opening along the diffuser wall for preventing or delaying boundary layer separation of the main flow. The opening may include a curved passageway having a curvature convex relative to the main flow for utilizing the Coanda effect. A gas turbi... | 05/24/2005 |
| 6805534 | Curved bucket aft shank walls for stress reduction A turbine bucket comprising an airfoil portion and a shank portion with a substantially horizontal platform radially therebetween, the shank portion having a forward shank wall and an aft shank wall; at least the aft shank wall convexly curved from one side of the b... | 10/19/2004 |
| 6655919 | Method for assembling a pelton turbine wheel The invention concerns a method which consists in: pre-positioning, in a housing (7) of a flange (5), a bucket (2) supported by part (23) of its outer surface (23) against an edge (71) of the housing (7) providing a space (E') between the convex surface (... | 12/02/2003 |
| 6543999 | Windmill A windmill is provided wherein the windmill comprises a central rotating shaft with an upper and a lower end opposite thereto. A blade arm is provided with an inward and an outward end opposite thereto, wherein the inward end of the blade arm is connected... | 04/08/2003 |
| 6210113 | Water wheel turbine for water power stations A waterwheel turbine for application in hydropower plants is provided. This turbine exploits primarily the head of the watercourse for energy recovery. The cells of the waterwheel turbine are each provided with a pair of mechanically linked flaps for cont... | 04/03/2001 |
| 6158953 | Wind turbine with variable position blades A wind turbine has an internal rotor carrying a plurality of turbine vanes in a circular path between an inlet opening and an exhaust opening. The inlet opening includes a stationary dividing vane that delivers one portion of the inlet airflow to a primar... | 12/12/2000 |
| 6033182 | Swash-plate device for controlling the pitch of rotor blades with non rotating plate stop track and pin The non-rotating plate of the device is stopped from rotating around the rotor axis by a stop arm with at least one rigid stop track extending substantially axially and secured to the structure of the rotor aircraft. The track works together with a stop p... | 03/07/2000 |
| 5720594 | Fan oscillating in two axes A portable fan providing oscillation in two axes. Oscillation may occur simultaneously in two axes, or in one selected axis. Two oscillation mechanisms are provided, each having its own oscillation motor and each being selectively operable independent of ... | 02/24/1998 |
| 5470198 | Sealing structures for gas turbine engines A cooling and sealing arrangement in a gas turbine engine comprises a seal assembly extending between nozzle guide vanes and combustion chamber discharge nozzles. The nozzle guide vanes have platforms having extensions which in one embodiment overlap the ... | 11/28/1995 |
| 5411371 | Swiveling electric fan A swiveling electric fan comprising a truncated sphere-shaped housing which encloses a vane member, and a base having a concave or convex spheric top surface with the same diameter as that of the housing, the housing being connected with the base in a swi... | 05/02/1995 |
| 5310313 | Swinging type of electric fan A swiveling electric fan comprising a truncated sphere-shaped housing which encloses a vane member, and a base having a concave spheric top surface with the same diameter as that of the housing, the housing being connected with the base in a swiveling man... | 05/10/1994 |
| 5302084 | Windmill with annular flywheel An improved windmill has an approximately vertical center support post. The windmill also has a plurality of wheels, each rotatably mounted on a separate horizontal axis, each axis being radially disposed about the center support post. The windmill also h... | 04/12/1994 |
| 5137416 | Vehicle compressed air energy converter A vehicle compressed air energy converter has been developed for use along vehicular roadways, railways and airfield runways to collect wind pressure developed by the vehicles, trains and aircraft moving through the atmosphere and convert such air motion ... | 08/11/1992 |
| 4573873 | Collective and cyclic in-mast pitch control system for a helicopter A compact, rugged, streamline, stiff, pitch control system is devised in a helicopter by concentrically nesting a cyclic pitch control tube and collective pitch control tube within the drive shaft and stationary mast of a helicopter rotor system. The coll... | 03/04/1986 |
| 4186313 | Wind generator A wind operated generator is disclosed herein having a stationary frame or base rotatably supporting at least four sets of pivotal blades intended to be driven by impinging wind currents. Each set of blades operate in unison for opening and closing air pa... | 01/29/1980 |
| 4045147 | Tiltable wind machine for use on variable terrain A rotatable and tiltable wind machine for protection of agricultural growth, the machine being adapted for installation on a selected terrain having a varying contour. The machine includes means for mounting on the terrain, a fan drive assembly on the mou... | 08/30/1977 |
