horizontal windmill patents

  • Green Mechanic: VERTICAL AXIS WIND TURBINE PARTS

    For large, commercial size horizontal-axis wind turbines, the generator is mounted in a nacelle at the top of a tower, behind the hub of the turbine rotor. Typically wind turbines generate electricity through asynchronous machines that are directly connected with the electricity grid. Usually the rotational speed of the wind turbine is slower than the equivalent rotation speed of the electrical network - typical .

  • United States Patent and Trademark Office

    The Patent Trial and Appeal Board has published an update containing additional guidance about trial practice before the Board. New rule for foreign trademark customers Effective August 3, applicants, registrants, and parties residing outside the United States are required to have a U.S.-licensed attorney represent them in all USPTO trademark ...

  • Groundbreaking Energy Ball Wind Turbine for Home Power

    Most modern wind turbines utilize a flat three-blade design, wherein the head of the windmill is directed into drafts by a computer. The tips of these windmills can reach up to six times the speed ...

  • Follow the Patents: Latest Potential Innovations in Wind ...

    One of the earliest of the modern wind turbine patents was U.S. Patent No. 2,360,791 for a "Wind Turbine" issued in 1944. The inventor was one Putnam Palmer Cosslett and the patent was ...

  • No more windmills: Wind catchers use Venturi technique to ...

    Allaei's wind catcher concept as he described it in one of his patents. The first small scale field unit, rated 300 mW was designed and constructed last year and validated the CFD models predictions.

  • New Bladeless Wind Turbine Claimed to be Twice as ...

    Aug 03, 2012 · A new type of wind turbine is poised to leap onto the wind power scene, this time without blades, twice as efficient and half the price of conventional wind turbines.

  • Windmill - Wikipedia

    Horizontal windmills. A similar type of horizontal windmill with rectangular blades, used for irrigation, can also be found in thirteenth-century China (during the Jurchen Jin dynasty in the north), introduced by the travels of Yelü Chucai to Turkestan in 1219. Horizontal windmills were built, in small numbers,...

  • Horizontal Axis Radial Wind Turbine - PatentBuddy

    The turbine may include an axle, a plurality of blade sections extending radially from the axle, and a generator operatively coupled to a first end of the axle. Each blade section may include a curved drag surface that provides a stall surface normal to the direction of an anticipated wind flow.

  • Horizontal Axis Wind Turbine VS Vertical Axis Wind Turbine ...

    Horizontal Axis Wind Turbine VS Vertical Axis Wind Turbine. The features of structure: As to the Horizontal axis wind turbine, during the process of one circle of rotation of the blades, the blades receive the combined effects of inertial force and gravity, the direction of the inertial force is subject to change, while that of the gravity is stable ever, so that the blades suffer an ...

  • Vertical Axis Wind Turbines: Great In 1890, Also-rans In ...

    Darrieus-style vertical axis wind turbines have aerodynamic blades which fly through the wind on their power strokes as they rotate around a shaft. Once again, origins of this are older than Darrieus himself, but he did create the patent in 1931.

  • Horizontal hinged-flap windmill - Free Patents Online

    Nov 18, 1975 · Windmill 11 is an omnidirectional, horizontal hinged-flap windmill which, as illustrated, rotates counterclockwise, when viewed from above, as shown by arrow 13, about central axis or shaft 15 when the wind blows in the direction indicated by arrow 17.

  • Wind Turbine Comparison (Vertical vs. Horizontal) - YouTube

    Aug 18, 2015 · We tested the difference between a savonius and vertical wind turbine (blade swept area are the same). This is only a comparison with simple cheap models but does show the general trend of .

  • US3920354A - Horizontal hinged-flap windmill - Google Patents

    Windmill 11 is an omnidirectional, horizontal hinged-flap windmill which, as illustrated, rotates counterclockwise, when viewed from above, as shown by arrow 13, about central axis or shaft 15 when the wind blows in the direction indicated by arrow 17.