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| Number | Title | Issue Date |
| 8075270 | Fan blade retention and variable pitch system A system for providing variable pitch to a rotor blade of an aircraft engine includes a rotatable hub; at least one blade mounted on the rotatable hub; a gear mechanism operably connected to the rotatable hub; a timing ring rotatably and operably connected to the ge... | 12/13/2011 |
| 8070446 | Wind turbine blade pitch control system The present invention provides an improvement for a wind turbine (20) having at least one blade (21) mounted on a hub (22) for controlled rotation about a blade axis (yb-yb) to vary the pitch of the blade relative to an air... | 12/06/2011 |
| 8061991 | Rotorcraft blade provided with a spar incorporating a fastener attachment, and a method of fabricating such a spar A rotorcraft blade is provided with a rigid attachment filler (1) and with a spar (40) that extends from a root (51) of the blade to a free end (52) of the blade, the attachment filler (1) having top, bottom, front, rear, left side... | 11/22/2011 |
| 7905707 | Pitch actuator for wind turbine generator, and wind turbine generator Provided are a pitch actuator for a wind turbine generator and a wind turbine generator that can be prevented from losing their reliability. Provided are a cylinder (12) and a rod (13) that rotate a wind turbine rotor blade about an axis thereof relati... | 03/15/2011 |
| 7901185 | Variable rotor blade for gas turbine engine A variable rotor blade mechanism for use in a gas turbine engine comprises a blade rotor, a blade, a harmonic drive system, a stepper motor and a bracket. The blade rotor rotates absolutely about an axial engine centerline during operation of the gas turbine engine.... | 03/08/2011 |
| 7891946 | Wind power plant and rotor blade adjusting drive therefor The present invention relates to a rotor blade adjusting drive for adjusting the pitch angle of a rotor blade of a wind power plant, comprising a drive train which at the output end can be connected with the rotor blade and/or a bearing member supporting the rotor b... | 02/22/2011 |
| 7874800 | Wind energy plant with a pitch bearing A wind energy plant with a rotor hub housing, which is connectable to at least one pitch bearing via joining means, and with at least one rotor blade, the blade root of which is connected to the pitch bearing, wherein a stiffening element is provided, which is faste... | 01/25/2011 |
| 7854592 | Wind turbine rotor, a rotation controlling mechanism and a method for controlling at least one blade of a wind turbine rotor The invention relates to a wind turbine rotor comprising at least one blade and at least on pitch mechanism comprising a ring shaped motor for controlling the blade. The wind turbine rotor is characterized in that, the ring shaped motor controls the blade through ge... | 12/21/2010 |
| 7775770 | Pitch bearing containment seal A flexible, resilient seal protects a bearing in a pitch joint of a helicopter blade assembly from contaminants. The seal includes a flexible, resilient body having a first end bonded to a stationary portion of the joint, and a second end biased into sealing engagem... | 08/17/2010 |
| 7614850 | Apparatus for assembling rotary machines A wind turbine generator includes at least one blade and a hub assembly. The hub assembly includes at least one substantially cylindrical wall defining a substantially annular hub cavity. The assembly also includes at least one substantially triangular frame inserte... | 11/10/2009 |
| 7470111 | Wind turbine A wind turbine equipped with a tower, a nacelle rotatably mounted on the tower, a rotor rotatable at the nacelle about a rotor axis of rotation and including one rotor hub and at least one rotor blade which is coupled by a blade bearing to the rotor hub while rotata... | 12/30/2008 |
| 7351033 | Wind turbine load control method A method for limiting loads in a wind turbine by using measured loads or wind speed to increase the minimum pitch angle for extended periods. The minimum pitch angle will be allowed to relax down to the default when load excursions diminish. The method will allow tu... | 04/01/2008 |
| 7350762 | Flow control assemblies having integrally formed shape memory alloy actuators In one embodiment of the present invention, a shape memory alloy (“SMA”)-actuated flow controller comprises a number of grille members, each having a long axis and being slideable relative to one another parallel to that long axis. The SMA-actuated flow controll... | 04/01/2008 |
| 7261517 | Device for adjusting a rotor blade of a wind energy turbine The device for adjusting a rotor blade of a wind energy turbine is provided with a driving device (12) for driving an adjusting element (24) for selectably rotating the rotor blade (26) in both directions about its longitudinal axis (28),... | 08/28/2007 |
| 7159398 | Concentric tube shape memory alloy actuator apparatus and method A rotary SMA actuator includes an SMA assembly having a plurality of grooves formed therein to form a plurality of concentrically arranged SMA tubes. A heater element is disposed against an input end of the SMA tubes and generates heat when electrical current is app... | 01/09/2007 |
| 7134840 | Rotor system for a remotely controlled aircraft A remotely controllable flying machine, such as a remote control ultralight helicopter, has at least one rotor blade (104), the pitch (α) of which may be adjusted. The adjustment of the pitch (α) of the at least one rotor blade is achieved by means of a for... | 11/14/2006 |
| 7082837 | Composite material and method of controlling damage thereto and damage sensor A composite material has a laminated structure of fiber-reinforced resin layers and films of a shape-memory alloy. A predetermined strain has been applied to each film. A damage sensor has a film of an alloy of nickel and titanium. An electric circuit is bonded to t... | 08/01/2006 |
| 7077630 | Lubrication of a pitch angle adjusting device of a rotor blade of a windmill In accordance with the invention an apparatus for rotating a shaft of a rotor blade of a wind power installation relative to a hub of the wind power installation, comprising a bearing arrangement between the components and a gear drive for actuation of the rotary mo... | 07/18/2006 |
| 7048506 | Method and apparatus for magnetic actuation of variable pitch impeller blades An integrated propulsion and guidance system for a vehicle includes an engine coupled to an impeller via a driveshaft to produce propulsive force. The impeller includes a hub and a plurality of blades, including at least one control blade pivotably mounted to the hu... | 05/23/2006 |
| 7037076 | Shape memory alloy device and control method A preferred rotary actuator includes an actuator assembly having a torque tube formed of a shape memory alloy (SMA), a superelastic NiTinol return spring associated with the torque tube and adapted to bias the torque tube toward an initial position, and a torque tub... | 05/02/2006 |
| 7008184 | Control for cooling fan A control for changing direction of air flow through a cooling core in response to an external signal and a purge signal includes a logic circuit and a relay assembly. The logic circuit generates a fan control signal based on the external signal, which causes the fa... | 03/07/2006 |
| 6938416 | Aircraft with shape memory alloys for retractable landing gear Aircraft that use a shape memory alloy to extend or retract landing gear are provided. The present invention includes aircraft that contain a first retractable landing gear and a first shape memory alloy. The first retractable landing gear in the aircraft may be mov... | 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 |
| 6921250 | Engine cooling fan with electromagnetic clutch Apparatus for conveying air to radiators of motor vehicles and the like having a fan (10) having a plurality of blades (12) each radially mounted its own coupling device (31) on a central body (11) and able to be rotationally actuated abo... | 07/26/2005 |
| 6811376 | Actuation system for a controllable pitch propeller A propeller control system provides for actuation through supply pressure only. A transfer bearing thereby requires only a single land. The supply pressure is metered at a pitch change valve within the rotating propeller shaft downstream of the transfer bearing to p... | 11/02/2004 |
| 6783326 | Means for adjusting the rotor blade of a wind power plant rotor Two independent adjusting systems are recommended for each rotor blade (6) for blade angle adjustments of the rotor blades (6) of the rotor of a wind power plant, assuring full redundancy of the blade angle adjustment. By suitable control of the indivi... | 08/31/2004 |
| 6776580 | Variable edge rotor blade A variable edge rotor blade adapted to be driven by the rotor hub includes an airfoil section; a movable edge section coupled to the airfoil section, and an actuator device operating independently of the hub, disposed in the blade proximate the movable edge section,... | 08/17/2004 |
| 6752595 | Propeller type windmill for power generation A plurality of wind turbine blades (3) are distributed equiangularly within a plane perpendicular to a horizontal rotating shaft (2) and around a hub (1) provided on the horizontal rotating shaft (2); the blade body of each turbine blade ... | 06/22/2004 |
| 6676377 | Device for simultaneously interlocking a plurality of actuators The invention relates to a device (3) for simultaneously interlocking a plurality of actuators (1) by means of a first locking element (5) which is assigned to each final control element (2) of an actuator (1) and which interacts with a second locking ele... | 01/13/2004 |
| 6672835 | Method and apparatus for self-contained variable pitch and/or constant speed propeller including provisions for feathering and reverse pitch operation A self-contained variable pitch and/or constant speed propeller including provisions for feathering and reverse pitch operation, wherein no direct contact is required between the fixed engine or airframe and the rotating propeller for effectuation of blad... | 01/06/2004 |
| 6609889 | Method and a device for adjusting the pitch and stopping the rotation of the blades of a wind turbine A method and mechanism for adjusting/controlling the pitch of at least one blade of a wind turbine relative to a wind direction parallel to a longitudinal main shaft of the wind turbine use a mechanism with a motor for rotating drive wheels in the angle g... | 08/26/2003 |
| 6607354 | Inductive rotary joint message system A messaging system for a rotating airfoil system is provided that includes a stationary structural member supporting a shaft that is rotatable about an axis. An airfoil assembly is supported by the shaft. A first arcuate coil assembly is supported on the ... | 08/19/2003 |
| 6592328 | Method and apparatus for adjusting the pitch of a fan blade A variable pitch fan blade assembly includes a hub, a pitch-adjusting assembly, a fan blade, and an actuator. The pitch-adjusting assembly includes a first element rotatable on a first axis and a second element rotatable on a second axis. The first elemen... | 07/15/2003 |
| 6544000 | Magnetostrictive adjustment of propeller blade A magnetostrictive rod subject to a magnetic field generated by an electrical activating coil within a pocket of a propeller blade is held in abutment with the body of the blade to effect its deflection causing change in shape involving a variation in bla... | 04/08/2003 |
| 6533549 | Helicopter A helicopter with rotor blades rotatably connected to a rotor head. The rotor head is non-rotatably connected with a rotor mast (1) pivoted in a transmission housing and driven by a transmission via at least one driving mechanism. A pitch of the rotor bla... | 03/18/2003 |
| 6514044 | Offset crowned roller assembly for variable pitch propellers The expense of a bearing employed at the interface of a yoke (22) and a propeller blade pin (14) in a variable pitch propeller assembly is reduced in a bearing construction (16) wherein a bearing race (48) includes a crowned surface (50) adapted to engage... | 02/04/2003 |
| 6499952 | Shape memory alloy device and control method A preferred rotary actuator includes an actuator assembly having a torque tube formed of a shape memory alloy (SMA), a superelastic NiTinol return spring associated with the torque tube and adapted to bias the torque tube toward an initial position, and a... | 12/31/2002 |
| 6465902 | Controllable camber windmill blades The present invention relates to a windmill power generation system which includes at least two variable camber blades fastened to a rotatable hub, which blades are driven by a fluid such as wind. Each of the variable camber blades has embedded shape memo... | 10/15/2002 |
| 6428274 | Drive mechanism for adjusting the rotor blades of wind power installations A device for adjustment of rotor blades which are pivotally mounted on a rotor hub of a wind power plant, with a drive for turning the rotor blades and a lockout which is connected to each rotor blade, the lockout being an activatable lockout which in the... | 08/06/2002 |
| 6379115 | Windmill and windmill control method A windmill includes a freely rotatable revolution shaft, a plurality of pairs of pivotal support rods provided at the revolution shaft, and wind receiving blades respectively and rotatably set between the pivotal support rods with wind receiving blade sha... | 04/30/2002 |
