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| Number | Title | Issue Date |
| 8087889 | Wind turbine blade with deflectable flaps A wind turbine having at least a blade comprising a first component having an aerodynamic profile with a leading edge, a trailing edge, and suction and pressure sides between the leading edge and the trailing edge, and a second component, attached to the trailing ed... | 01/03/2012 |
| 7594796 | Rotorcraft blade provided with a tiltable flap and a fastener tongue The present invention relates to a rotorcraft rotor blade (1) that comprises at least one tiltable trailing-edge flap (5), said flap (5) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially in the span direction ... | 09/29/2009 |
| 7585151 | Rotorcraft blade provided with a flap that is tiltable with the help of at least one main ball joint having a first shaft that is secured to said flap The present invention relates to a rotorcraft rotor blade (1) having at least one trailing edge flap (5) that is tiltable, the flap (5) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially along the span of the b... | 09/08/2009 |
| 7334755 | Tandem rotor wing and tandem fixed wing aircraft Aircraft comprising an airframe having a fuselage, at least two fixed wing sets. A first fixed wing set of the fixed wing sets is positioned closer to a forward end of the fuselage than a second fixed wing set and the second fixed wing set is positioned closer to th... | 02/26/2008 |
| 7281900 | Cascade rotor blade for low noise Low-noise airfoils and methods of reducing noise. One embodiment provides an aerodynamic member that includes two body portions coupled to each other. The second body portion includes a plurality of airfoil members in a fixed relationship with each other. Optionally... | 10/16/2007 |
| 7264200 | System and method for improved rotor tip performance The present invention discloses systems and methods for the performance enhancement of rotary wing aircraft through reduced torque, noise and vibration. In one embodiment, a system includes a sail having an aerodynamic shape positioned proximate to a tip of the roto... | 09/04/2007 |
| 7204674 | Rotor blade for a wind power installation A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly lower is the load level for which installation has to be designed and t... | 04/17/2007 |
| 7147182 | Gas-powered tip-jet-driven tilt-rotor compound VTOL aircraft A tilt-rotor compound VTOL aircraft has a multiple-flow thrust generator(s) comprising a gas-powered tip-jet driven rotor(s) having a thrust-augmentation ratio of at least two; that tilts about the aircraft's pitch axis wherein the rotor's plane of rotation is subst... | 12/12/2006 |
| 7101237 | Propellor blade adjustment system for propulsion through fluid environments under changing conditions The stern end of a seawater hull has a rotor hub with propeller blades thereon. The rotor hub is rotated for propulsion of the hull by means of a propeller shaft extending through a sealed compartment within the hull. Such sealed compartment and an electrically powe... | 09/05/2006 |
| 7093788 | Rotating flying wing aircraft and control system A rotating wing aircraft has a rotating fuselage and wings. The aircraft is configured to rotate with the air passing over the wings because of the rotation providing the lift needed to keep the aircraft aloft. The wings have rudders coupled to them, such as at the ... | 08/22/2006 |
| 7090550 | Propeller with variable geometry and method for varying geometry of a propeller The present invention broadly comprises a propeller having a blade assembly with a plurality of linking members operatively connected to change dimensions of the blade assembly as the linking members are moved with respect to one another. It further includes a blade... | 08/15/2006 |
| 7083382 | Vertical axis wind turbine The present invention provides a prime mover (2) for harnessing energy from a flow of fluid, the prime mover (2) comprising a shaft (4) having a rotational axis, arranged to be rotatably mounted to a substructure, the shaft (4) comprising... | 08/01/2006 |
| 6984109 | Rotor blade pitch control assembly A rotor blade assembly provides a pitch control assembly to pitch the rotor blade about a rotor blade pitch axis. The pitch control assembly includes a trailing edge flap and a trailing edge servo flap that extend from the trailing edge of the rotor blade. The trail... | 01/10/2006 |
| 6942455 | Strain isolated trim tab A rotor blade assembly system includes a trim tab assembly which utilizes relatively thick resilient members bonded between a trim tab and the two trim tab doublers. Spanwise segmenting of the tab and the use of thick resilient member isolates the trim tab from norm... | 09/13/2005 |
| 6940186 | Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at... | 09/06/2005 |
| 6932569 | Active control of multi-element rotor blade airfoils A multi-element rotor blade includes an individually controllable main element and fixed aerodynamic surface in an aerodynamically efficient location relative to the main element. The main element is controlled to locate the fixed aerodynamic surface in a position t... | 08/23/2005 |
| 6769872 | Active control of multi-element rotor blade airfoils A multi-element rotor blade includes a main element and an active slat movable relative to the main element. The slat rotates and translates relative to the main element from a base position. The base position provides a compromise between minimum coefficient of dra... | 08/03/2004 |
| 6682296 | Turbine for flowing fluids Turbine for flowing fluid, especially a turbine having a vertical power output shaft and formed with several wings projecting radially out from the power output shaft, which wings are rotatable over an angle of about 90° about horizontal shafts extending... | 01/27/2004 |
| 6652232 | Self-trimming oscillating wing system The present invention shows an oscillating wing system like lifting surface featuring a symmetrical profile mounted free to rotate over a fixation point located ahead neutral point and self-trimming at angle of attack in the flow by adjustment of a traili... | 11/25/2003 |
| 6530542 | Rotary wing aircraft with electric pitch control Rotary wing aircraft with electric pitch control. According to the invention, each blade (5.i) of the wing comprises a plurality of flaps (6.i) which are able to control the pitch of said blade and are aligned along the span of the latter, said flaps being ... | 03/11/2003 |
| 6354536 | Rotor hub mounted actuator for controlling a blade on a rotorcraft A hub mounted actuation system for providing control of a portion of a rotor blade, such as a flap, on a rotorcraft. The rotor blade is attached to a rotor shaft that rotates with respect to an airframe. The hub mounted actuation system includes a station... | 03/12/2002 |
| 6234422 | Uniblade air rotor and flight and covercraft vehicles with its The invention is related to air flight vehicles, such as vertical take-off and landing (VTOL) airplanes, helicopters and covercraft. The goal of this invention is to create an air rotor designed so that while after vertical take off or cover regime, one can be... | 05/22/2001 |
| 6200096 | Actuation system for an active rotor control system A flap actuation system for a helicopter rotor blade. The rotor blade includes a root end, a tip end, a trailing edge and a flap hinged to at least a portion of the trailing edge about a pivot axis. The flap actuation system includes at least one supply l... | 03/13/2001 |
| 6196796 | High torque actuation system for an active rotor control system An actuation system for pivoting a flap on a helicopter rotor blade to reduce the interaction of the blade with the preceding blade vortex. The actuation system includes a fluid supply which is connected to first and second fluid supply lines. The fluid s... | 03/06/2001 |
| 6152692 | Rotor blade with swivelling air flow control flap The blade includes at least one trailing edge swivelling air flow control flap, swivelling on the blade around an axis directed substantially along the span of the blade and the control flap, the swivelling of the control flap being controlled by an actua... | 11/28/2000 |
| 6065935 | Cycloidal propeller having blades which may be set into a sailing position The invention provides for a cycloidal propeller, in strictly rudder operation, accessory apparatuses that mesh with a gear drive connected to a shaft of the respective wing. The invention accomplishes relatively small actuation movements of the accessory... | 05/23/2000 |
| 5791601 | Apparatus and method for aerodynamic blowing control using smart materials A method and apparatus for controlling the blowing of compressed air from an aerodynamic structure such as an aircraft wing or helicopter rotor blade and thus controlling the aerodynamic properties of the wing comprises a narrow slot (13) in the upper sur... | 08/11/1998 |
| 5752672 | Remotely controllable actuating device An actuating device can change a position of an active member that remains in substantially the same position in the absence of a force of a predetermined magnitude on the active member. The actuating device comprises a shape-memory alloy actuating member... | 05/19/1998 |
| 5730581 | Rotor blade A rotor blade made of fiber-reinforced synthetic resin has a profile which, at least in the region of the blade tip is designed so as to be twistable by actuators about the rotor blade longitudinal axis. The torsion skin of the rotor blade in the region o... | 03/24/1998 |
| 5711651 | Blade vortex interaction noise reduction techniques for a rotorcraft An active control device for reducing blade-vortex interactions (BVI) noise generated by a rotorcraft, such as a helicopter, comprises a trailing edge flap located near the tip of each of the rotorcraft's rotor blades. The flap may be actuated in any conv... | 01/27/1998 |
| 5676524 | Vertical-axis wind turbine A turbine has an upright shaft defining and rotatable about a vertical main axis, a support plate fixed to the shaft, a plurality of upright vanes pivotal on the support plate about respective vane axes offset from and generally parallel to the main axis,... | 10/14/1997 |
| 5588800 | Blade vortex interaction noise reduction techniques for a rotorcraft An active control device for reducing blade-vortex interactions (BVI) noise generated by a rotorcraft, such as a helicopter, comprises a trailing edge flap located near the tip of each of the rotorcraft's rotor blades. The flap may be actuated in any conv... | 12/31/1996 |
| 5527151 | Advanced wind turbine with lift-destroying aileron for shutdown An advanced aileron configuration for wind turbine rotors featuring an aileron with a bottom surface that slopes upwardly at an angle toward the nose region of the aileron. The aileron rotates about a center of rotation which is located within the envelop... | 06/18/1996 |
| 5503525 | Pitch-regulated vertical access wind turbine A cross flow wind turbine comprising a rotor mounted for rotation about a vertical axis and a plurality of blade assemblies mounted on the rotor. Each blade assembly comprises a blade of aerofoil section mounted vertically for pivotal movement about a ver... | 04/02/1996 |
| 5409183 | Helicopter with leading edge servo flaps for pitch positioning its rotor blades In a helicopter having a main rotor with blades controlled in pitch by servo flaps the servo flaps are arranged in advance of the leading edges of the blade to provide increased lift efficiency of the rotor system. The signals for controlling the pitches ... | 04/25/1995 |
| 5320491 | Wind turbine rotor aileron A wind turbine has a rotor with at least one blade which has an aileron which is adjusted by an actuator. A hinge has two portions, one for mounting a stationary hinge arm to the blade, the other for coupling to the aileron actuator. Several types of hing... | 06/14/1994 |
| 5255871 | Helicopter having rotors equipped with flaps A helicopter comprises a pair of rotors each having a flap hinged to one of its edges, a seesaw rod swingably supported above the rotors, a pair of auxiliary wings fixed to opposite ends of the seesaw rod, and a pair of connecting rods each connecting one... | 10/26/1993 |
| 5193978 | Articulated blade with automatic pitch and camber control An articulated blade whose forward vane section is directly pitched by relative fluid flow upon it, and whose rear deflector section deflects the flow upon it. A control arm, through parallelogram linkage, maintains the deflector in parallel orientation w... | 03/16/1993 |
| 5150864 | Variable camber control of airfoil An airfoil camber control apparatus utilizes a cable of shape memory alloy affixed at its ends to a front interior portion of the airfoil. A tensioning system is connected to a rear interior portion of the airfoil and to the cable. When electrical current... | 09/29/1992 |
| 4655685 | Helicopter main rotor blade having a short span slot near the tip end A helicopter main rotor blade having built-in twist for improved hover performance is provided with a trailing-edge, short span slot near the tip end of the blade for upwardly directing a stream of pressurized air therefrom. The upward ejection of air fro... | 04/07/1987 |
