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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8172542 | Wind turbine blade and wind turbine generator using the same A wind turbine blade includes a laminated structure having an outer shell (1) having a shape of the blade, an upwind-side reinforcing section (4a) which reinforces a upwind-side part of the blade in the outer shell 1 and a downwind-side r... | 05/08/2012 |
| 8147206 | Jet vane and method for manufacturing a jet vane A jet vane for use in streams of hot gas, comprising a wing having a core area and a cover skin area surrounding the core area, is proposed. The cover skin area is made of a fiber-reinforced material, and the fibers in the cover skin area are oriented substantially ... | 04/03/2012 |
| 8137074 | Wind turbine lightning protection system A glass-reinforced fiber or carbon-reinforced wind turbine blade having a suction side and a pressure side includes a tip portion adapted with an electric field control region disposed solely on or within the tip portion. The electric field control region is in elec... | 03/20/2012 |
| 8100662 | Fan blade made of a textile composite material A gas-turbine engine fan blade made of a textile composite material includes short carbon fiber intermediate layers (8) for forming the blade root arranged between splayed carbon fiber layers (7) in the blade root (2). In a compressive stress-af... | 01/24/2012 |
| 8079820 | Blade module, a modular rotor blade and a method for assembling a modular rotor blade A blade module of a modular rotor blade comprising a hollow fiber composite body which extends along a longitudinal blade axis and at least one inlay located at or near a longitudinal end of the fiber composite body is provided. The inlay includes a receptacle which... | 12/20/2011 |
| 8075277 | Method for casting a component and a component comprising at least partly of fibre-reinforced plastic laminate There is described a method for casting a component comprising at least partly of fiber-reinforced plastic laminate by which the fiber-reinforcement is arranged in a casting mould, wherein at least one venting duct is placed, wherein said fiber-reinforcement and sai... | 12/13/2011 |
| 8061997 | Damping device for composite blade The present invention relates to a blade made of composite, comprising a vane formed of woven filaments impregnated with a thermosetting resin with a protective element in the region of the leading edge of the vane comprising a part in the form of a rigid strip, sai... | 11/22/2011 |
| 8047798 | Method of manufacturing a wind turbine blade shell member A method for preparing a wind turbine blade shell member including a plurality of elements of cured fiber-reinforced sheet material is provided. A plurality of elements of cured fiber-reinforced sheet material is provided in a mould, a resin is introduced between th... | 11/01/2011 |
| 8043067 | Wind turbine blade with sufficiently high strength and light weight A wind turbine blade is provided with an outer skin layer formed of fiber-reinforced plastic, and a plurality of main structural members formed of fiber-reinforced plastic integrally with the outer skin layer to extend in a blade length direction. The main structura... | 10/25/2011 |
| 8038408 | Composite aerofoil A composite blade (26) comprises a three-dimensional arrangement of reinforcing fibres (58) and a matrix material (60) infiltrated around the three-dimensional arrangement of woven reinforcing fibres (60). The three-dimensional arrangemen... | 10/18/2011 |
| 7963747 | Braided wind turbine blades and method of making same A blade for a wind turbine and a method for making same are provided. The blade includes a skin having a braided fiber sock. One or more stiffeners are attached to the braided fiber sock. ... | 06/21/2011 |
| 7938627 | Woven turbomachine impeller An impeller is provided that may be used in compressors or turbines. In another aspect of the present invention, a fiber or a bundle of fibers is woven to form at least two blades of an impeller. Yet another aspect of the present invention employs a peripheral compo... | 05/10/2011 |
| 7901189 | Wind-turbine blade and method for reducing noise in wind turbine Low-noise wind turbine blades are provided wherein metallic and/or polymeric cellular materials that are capable of bearing directional loads are used in the construction of wind turbine blade parts or entire sections. The use of such materials influences the air fl... | 03/08/2011 |
| 7896619 | Blades Compressor fan blades have an isotropic core and composite fiber layers in an epoxy matrix. The fibers on opposite broad surfaces of the blade extend at an angle of between 25° and 35° to the blade length. The fibers on opposites sides of the blade are inclined in... | 03/01/2011 |
| 7766625 | Methods and apparatus for reducing stress in turbine buckets A method facilitates reducing stress in a turbine bucket including a metallic base metal. The method comprises providing a turbine bucket including at least one pocket formed therein, and filling at least one pocket defined in the bucket with a polymer composite hav... | 08/03/2010 |
| 7600979 | CMC articles having small complex features A ceramic matrix composite (CMC) component for gas turbine engines, the component having fine features such as thin edges with thicknesses of less than about 0.030 inches and small radii of less that about 0.030 inches formed using the combination of prepreg plies l... | 10/13/2009 |
| 7600978 | Hollow CMC airfoil with internal stitch A CMC airfoil (20) formed with CMC stitches (37) interconnected between opposed walls (26, 28) of the airfoil to restrain outward flexing of the walls resulting from pressurized cooling air within the airfoil. The airfoil may be formed of a cera... | 10/13/2009 |
| 7585156 | Strained capable conductive/resistive composite hybrid heater for thermal anti-ice device A rotor blade of a helicopter is presented. In an embodiment, the rotor blade includes a body; and a heating mat arranged in the body and configured to supply heat to said body. The heating mat includes a first plurality of fibers and a second plurality of fibers el... | 09/08/2009 |
| 7581932 | Method of manufacturing a composite turbomachine blade, and a blade obtained by the method The invention relates to a method of manufacturing a composite turbomachine blade, the method comprising the following steps: a) making a preform by three-dimensionally weaving yarns including tracer yarns disposed at least at the ... | 09/01/2009 |
| 7575417 | Reinforced fan blade A fan blade including a plurality of fiber composite layers and at least one high elongation fiber composite strip joining one of the fiber composite layers at a joint. A method of making a fan blade includes joining a plurality of fiber composite layers and joining... | 08/18/2009 |
| 7547194 | Rotor blade and method of fabricating the same A method for fabricating a rotor blade includes fabricating a rotor blade that includes a dovetail and an airfoil coupled to the dovetail, the airfoil including a first side, a second side, and a plurality of openings extending therethrough, and weaving a composite ... | 06/16/2009 |
| 7510379 | Composite blading member and method for making A composite blading member includes an airfoil and a base of composite material layers and a platform of composite material layers interfused with the airfoil and base. The platform comprises a platform shelf and a plurality of spaced-apart platform supports integra... | 03/31/2009 |
| 7494324 | Member for potential equalising A member for potential equalising in a wind turbine blade between a first conducting member, such as a member comprising carbon fibres, and a second conducting member, such as a lightning conductor is provided. Furthermore, methods for manufacturing of such members ... | 02/24/2009 |
| 7491032 | Organic matrix composite integrally bladed rotor An integrally bladed rotor is constructed from a plurality of layers of organic matrix composite material wound together in a spiral fashion to form the disc portion of the rotor, and at each rotor blade position at least the outermost one of the layers is turned su... | 02/17/2009 |
| 7438533 | Wind turbine rotor blade A rotor blade for a wind turbine includes a flange section configured to connect the rotor blade to a rotor hub. The flange section is formed from a hybrid material including glass fibers and carbon fibers embedded in a matrix material. The carbon fibers are oriente... | 10/21/2008 |
| 7435056 | Leading edge erosion protection for composite stator vanes The present invention provides a turbofan engine including leading edge erosion protection for composite stator vanes contained therein. The composite stator vanes are defined by a leading edge, a trailing edge, a concave surface and a convex surface. The vanes are ... | 10/14/2008 |
| 7429166 | Methods and apparatus for gas turbine engines A method for manufacturing a turbine engine component includes forming a component to include a first side and an opposite second side, positioning at least one capillary adjacent to an external surface of at least one of the first and second sides, and securing the... | 09/30/2008 |
| 7429165 | Hybrid blade for a steam turbine To address certain deficiencies of carbon fiber material as a filler in a hybrid blade, a glass composite layer is provided as a barrier layer between a carbon fiber resin filler and the metallic main body of the blade. The glass composite layer also advantageously ... | 09/30/2008 |
| 7427189 | Wind turbine rotor blade A wind turbine rotor blade includes a pressure side sparcap having a carbon fiber reinforced section extending substantially a full longitudinal length of the pressure side sparcap and a suction side sparcap having a glass fiber reinforced section extending substant... | 09/23/2008 |
| 7422417 | Airfoil with a porous fiber metal layer An air cooled airfoil for use in a gas turbine engine includes a base, a porous material on the base, and a thermal barrier coating (TBC) applied to the porous material, with cooling holes in the base and the TBC to allow for cooling air to flow from within the airf... | 09/09/2008 |
| 7410342 | Airfoil support A blade or a vane preferably used in a gas turbine engine, the blade or vane being formed of a metallic core or insert with a ceramic airfoil surface bonded to the metallic insert. The insert includes a series of concave and convex portions arranged along the outer ... | 08/12/2008 |
| 7399162 | Wind turbine A fluid turbine, such as a wind or hydro turbine, for generating electrical power, the turbine having a rotor assembly comprising a hub, a rim and a plurality of tensioned cable members joining them together, the cable members being grouped into sets to define a plu... | 07/15/2008 |
| 7393184 | Modular blades and methods for making same A method for making a blade includes stacking a plurality of modular segments having formed conduits, threading and tensioning cables through the conduits of the stacked segments, and clamping the cables to hold the modular segments together. ... | 07/01/2008 |
| 7390169 | Lightning protection of a pitch-controlled wind turbine blade A wind turbine rotor including a rotor hub (3) and a plurality of blades (4), and where each blade root (16) is connected to said rotor hub through a pitch bearing (5) in such a manner that the pitch angle of the blade is adjustable by a ... | 06/24/2008 |
| 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 surface (48) extend... | 06/10/2008 |
| 7377750 | Lightning protection system for a wind turbine In a wind turbine (104, 500, 704) having a plurality of blades (132, 404, 516, 744) and a blade rotor hub (120, 712), a lightning protection system (100, 504, 700) for conducting lightning strikes to any one of the blades and the region s... | 05/27/2008 |
| 7377752 | Wind blade spar cap and method of making A wind blade spar cap for strengthening a wind blade including an integral, unitary three-dimensional woven material having a first end and a second end, corresponding to a root end of the blade and a tip end of the blade, wherein the material tapers in width from t... | 05/27/2008 |
| 7364407 | Transition zone in wind turbine blade The invention relates to a wind turbine blade and a transitional shell blank for the manufacture of the shell of a wind turbine blade, the blade or the transitional shell blank being made of fibre-reinforced polymer including a first type of fibres (1, 3, 6) ... | 04/29/2008 |
| 7357726 | Method of producing a fibre reinforced structural element A method of producing a fibre reinforced structural element including a plurality of fittings for the fixation of the element to another structural element, includes the steps of: (i) providing a core element of fibre reinforcement material having an end part; (ii) ... | 04/15/2008 |
| 7351040 | Methods of making wind turbine rotor blades A method of manufacturing a root portion of a wind turbine blade includes, in an exemplary embodiment, providing an outer layer of reinforcing fibers including at least two woven mats of reinforcing fibers, providing an inner layer of reinforcing fibers including at... | 04/01/2008 |
