Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8186956 | Semi-flexible supporting structure for wind turbine A frame for supporting equipment arranged in a hub of a wind turbine is fixed to the hub at one end and flexibly connected to the hub at another end. The variation of the relative position between the hub and the frame caused by the deformation of the hub associated... | 05/29/2012 |
| 8133027 | Integrated actuator for a propeller system A propeller system includes a propeller hub which supports a multiple of propeller blades. A tailshaft extends from a propeller hub portion of the propeller hub along an axis of rotation with a propeller pitch change yoke mounted within the propeller hub for movemen... | 03/13/2012 |
| 8109729 | Wind turbine and a pitch bearing for a wind turbine A wind turbine includes a rotor having a rotational axis and a wind turbine blade connected to a hub through a pitch bearing. The pitch bearing includes an outer ring, a center ring and an inner ring. The pitch bearing further includes a first rolling element arrang... | 02/07/2012 |
| 8109728 | Adjusting apparatus for adjusting the pitch angle of propeller blades, variable-pitch propeller, control function which can be implemented in a computer, and method for adjusting the pitch angle of propeller blades Apparatus for adjusting pitch angle of propeller blades of a variable-pitch propeller. The blades being adjustable in a first blade pitch-angle range with positive pitch angles, in a second blade pitch-angle range, and in a third blade pitch-angle range with negativ... | 02/07/2012 |
| 8047792 | Wind turbine pitch bearing, and use hereof The invention relates to a wind turbine including at least two pitch controlled wind turbine blades. Each blade has pitch bearings including two or more bearing rings, and pitch controlling means for pitching the blades by means of the bearings. The blades are mount... | 11/01/2011 |
| RE42523 | Stator vane stage actuated by an automatically-centering rotary actuator ring A variable pitch stator vane stage, said vanes being moved by an automatically-centered rotary actuator ring. The casing carries a stationary coaxial annular rail projecting from its outside surface, and circumferentially spaced apart moving equipments are provided ... | 07/05/2011 |
| 7306430 | Ram air turbine blade rotation over-speed prevention mechanism A ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a turbine hub-mounted centrifugally operated trigger mechanism and rotating the blades to a fixed coarse pitch position with a releas... | 12/11/2007 |
| 7259472 | Wind turbine generator A wind turbine generator including a nacelle having reduced size and weight is provided. The wind turbine generator includes a nacelle disposed on a tower. The nacelle includes a main shaft that is connected to a rotor head equipped with blades and that integrally r... | 08/21/2007 |
| 7256509 | Wind power plant comprising a rotor blade adjusting device A wind power plant including a rotor having at least one angle-adjustable rotor blade, a generator that, for generating electrical power, can be directly or indirectly coupled to the rotor and, for supplying the electrical power, can be directly or indirectly couple... | 08/14/2007 |
| 7241111 | Contoured disk bore A turbine disk comprising a disk bore disposed about a centerline, the disk bore comprising a bore width, and a web extending radially away from the disk bore wherein the disk bore comprises in cross-section a contoured shape comprising a contour depth. ... | 07/10/2007 |
| 7205678 | Wind power generator The invention relates to a wind power current generator comprising a bearing, a tubular stator that carries a race of the bearing, a tubular rotor coaxial with the tubular stator that can rotate in relation to the stator, a hub connected to the rotor, and at least t... | 04/17/2007 |
| 7198469 | Wind generator of the type with automatic power regulation The invention relates to a wind generator of the type with automatic power regulation, comprising at least one propeller having at least two blades (21), whereby the efficiency of one propeller varies inversely to a variation in the wind energy, from a lower ... | 04/03/2007 |
| 7183665 | Direct drive wind turbine A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially insid... | 02/27/2007 |
| 7172392 | Passive speed and power regulation of a wind turbine A wind turbine with at least one blade having a pitch axis that is offset laterally so that the blade does not intersect with an axis of rotation of the wind turbine, and a center of mass and an aerodynamic center are offset from the pitch axis in the direction para... | 02/06/2007 |
| 7165935 | Axial compressor In an axial compressor (10), in particular for a gas turbine, with a plurality of stages (ST1, . . . , ST5) which are arranged one behind the other between a compressor inlet (14) and a compressor outlet (15) and include in each ca... | 01/23/2007 |
| 7137785 | Wind power station A wind power station has at least one rotor. The rotor has at least one rotor blade, preferably two or more rotor blades. The rotor blade is operatively connected to a rotor shaft. The rotor blade can rotate about a substantially radially extending adjustment axis. ... | 11/21/2006 |
| 7098619 | Actuator and movement linkage system An actuator and movement linkage system for moving a load, such as a control surface of aircraft, in relation to a carrying structure includes an electric motor system, an actuator device connectable or connected to the load to move the load, the actuator device con... | 08/29/2006 |
| 7094030 | Contoured disk bore A turbine disk comprising a disk bore disposed about a centerline, the disk bore comprising a bore width, and a web extending radially away from the disk bore wherein the disk bore comprises in cross-section a contoured shape comprising a contour depth. ... | 08/22/2006 |
| 7075192 | Direct drive wind turbine A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially insid... | 07/11/2006 |
| 6939103 | Wind power installation with multiple blade adjusting devices The present invention concerns a wind power installation having a rotor with at least one blade and an adjusting device for the rotor blade. An adjusting device with more than one drive for one rotor blade is provided. By virtue of that arrangement each drive only h... | 09/06/2005 |
| 6935841 | Fan assembly A fan assembly includes a vertical axis wind turbine (VAWT) which is coupled to an air extraction or air supply fan. The VAWT is located above and is coupled coaxially to the fan. The fan assembly also includes an auxiliary turbine to provide start-up torque to init... | 08/30/2005 |
| 6769873 | Dynamically reconfigurable wind turbine blade assembly A dynamically reconfigurable wind turbine blade assembly includes a plurality of reconfigurable blades mounted on a hub, an actuator fixed to each of the blades and adapted to effect the reconfiguration thereof, and an actuator power regulator for regulating electri... | 08/03/2004 |
| 6669444 | Fan or propeller, with shape memory A propeller or fan, in particular a cooling fan, such as for the radiator of a motor vehicle or electric equipment, for civil or industrial plants, comprising shape-memory actuator means to regulate the direction and/or shape of the blades, for example ac... | 12/30/2003 |
| 6492743 | Jet assisted hybrid wind turbine system Hybrid wind turbine apparatus includes a pair of counter rotating rotors having micro thrusters fitted at tip of each blade of the rotors. An upright mast supports bearings underlying and rotatably supporting a hub assembly having tandemly mounted dual al... | 12/10/2002 |
| 6417640 | Displacement sensors for servo-control actuators A structure comprising firstly a differential sensor of linear displacement comprising a body and a core slidably mounted relative to said body, and secondly a rod of a servo-control actuator in which the core is mounted, said rod terminating in an endpie... | 07/09/2002 |
| 6364610 | Manually adjustable variable-pitch boat propeller A variable-pitch boat propeller has a hub rotatable about a hub axis, a plurality of vanes rotatable on the hub and extending generally radially of the hub axis, and an adjustment element rotatable on the hub about the hub axis and connected to the vanes ... | 04/02/2002 |
| 6261062 | Actuation system for a controllable pitch propeller A controllable pitch propeller device is provided with a pitch locking system that prevents a controllable pitch propeller blade from being inadvertently forced to an extreme end of travel in the event that hydraulic pressure is lost in either of two cond... | 07/17/2001 |
| 6250979 | Boat drive with variable-pitch propeller A boat drive has a housing, a tube shaft rotatable in the housing about a shaft axis and having axially opposite front and rear ends, a hub carried on the shaft rear end, and a plurality of radially projecting vanes pivotal on the hub. An axially shiftabl... | 06/26/2001 |
| 6231005 | Device for the individual control of the rotor blades of the rotary wing structures of aircraft with multiple swashplates The device for the individual control of the blades includes at least two sets of rotating swashplates centered on the rotor axis and non-rotating swashplates at least inclinable in all directions under the action of at least two actuators inserted betwee... | 05/15/2001 |
| 5967753 | Controllable-pitch propeller, especially for sport boats and other watercraft A controllable-pitch propeller for a sport-type watercraft has a push rod eccentrically connected to each blade displaceable in a bore of the propeller hub. The push rod is sealed with respect to the end of that bore by a multifold bellows whose radial fl... | 10/19/1999 |
| 5907192 | Method and system for wind turbine braking Stored rotational energy in an operating variable speed wind turbine is used to pitch blades and brake the wind turbine in the event of utility power grid failure. In one embodiment, a generator IGBT converter and the main power utility grid IGBT converte... | 05/25/1999 |
| 5795132 | Variable pitch propeller A variable pitch mechanism for a propeller is provided which has a simplified design in which, during normal operation, all component parts rotate substantially as a unit. In one embodiment the range of available pitches is limited automatically when a pr... | 08/18/1998 |
| 5749540 | System for controlling and automatically stabilizing the rotational motion of a rotary wing aircraft In a helicopter having a device for stabilizing yaw motion through the use of a tail rotor with a plurality of rotor blades extending radially from a hollow rotor shaft which is mounted for rotation about a transverse rotor axis. The tail rotor is provide... | 05/12/1998 |
| 5733156 | Variable propeller for boat In a variable propeller for a boat, variable-diameter main blades and stationary subsidiary blades are mounted on a propeller boss in order to provide further enhanced low-speed driving property and high-speed and high-output performance. When the main bl... | 03/31/1998 |
| 5685694 | Air driven turbine having a blade pitch changing mechanism including overspeed protection An air driven turbine having variable pitched blades is provided that includes a pitch change mechanism for adjusting the pitch of the blades during either rotating or non-rotating operational modes of the air driven turbine. The pitch control mechanism i... | 11/11/1997 |
| 5562415 | Pitch-control devices for hingeless rotors For each blade, the cuff which is rigid in torsion, surrounding the corresponding rotor attachment twistable arm, bears two opposed pitch levers each articulated to one respectively of two intermediate connecting rods which are moreover articulated to one... | 10/08/1996 |
| 5518370 | Portable electric fan with swivel mount A portable electric fan including a base having an upwardly directed coupling surface and a bottom surface for mounting on a foundation; a support having a downwardly directed coupling surface rotatably mounted on the upwardly directed coupling surface; a... | 05/21/1996 |
| 5505589 | Controllable variable twist rotor blade assembly A controllable variable twist rotor blade assembly wherein the twist along the span of the blade is continuously variable and may be controlled either manually by the pilot or automatically according to data input from flight sensors monitoring flight par... | 04/09/1996 |
| 5305968 | Device for automatically stabilizing the yaw motion of a helicopter In a helicopter having a tail rotor with a plurality of rotor blades extending radially from a hollow rotor shaft which is mounted for rotation about a transverse rotor axis, and having a push-pull rod extending through the hollow shaft and operably conne... | 04/26/1994 |
| 5281095 | Variable-pitch mechanism for a propeller A variable-pitch mechanism, for use in an airplane, a ship, or the like, for adjusting the pitch of a plurality of blades of a propeller in which attachment shafts of a plurality of radial blades of a propeller are rotatably mounted on a tubular hub which... | 01/25/1994 |
