| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 416135000 | Resilient bias or mount | 17 |
| 20090148288 | VERTICAL FURLING FOR WIND TURBINES - A horizontal axis wind turbine apparatus includes a turbine assembly comprising a generator mounted in a housing, a rotor operative to rotate the generator in response to wind forces, and a tail extending rearward from the housing, and a base adapted to be mounted on a tower. The housing is pivotally attached to the base about a horizontal pivot axis oriented substantially perpendicular to a rotational axis of the generator and located rearward of a center of gravity of the turbine assembly such that the housing can pivot upward about the pivot axis from a lowered position to a raised position. A spring is operative to exert a downward bias force on the housing to urge the housing toward the lowered position. | 06-11-2009 |
| 20090180881 | FAN BLADE MOUNTING SYSTEM - A ceiling fan is disclosed having a blade iron mounting system ( | 07-16-2009 |
| 20100135805 | RIGID ROTOR ASSEMBLY FOR FOLDING HELICOPTER BLADES - Described herein is a rigid rotor assembly configured to allow rotation of helicopter rotor blades attached to the rigid rotor assembly from a deployed position to a stowed position. The rigid rotor assembly includes a base including a shaft extending therethrough, a first spindle configured to engage the shaft, and a second spindle configured for placement onto the shaft. The second spindle is operable to maintain a first position with respect to the first spindle via an attachment mechanism therebetween, the second spindle further operable to maintain a second position with respect to the first spindle via the attachment mechanism. | 06-03-2010 |
| 20100215496 | Helicopter Rotor - A rotor for a helicopter, having a drive shaft rotating about a first axis; a hub angularly integral with the drive shaft about the first axis; and at least two blades projecting from the hub on opposite sides of the first axis and elongated along respective second axes crosswise to the first axis; each blade is movable with respect to the hub and to the other blade about a respective third axis crosswise to the respective second axis; the rotor has at least two dampers for damping oscillation of respective blades about the respective third axes, and which have respective first portions movable integrally with the respective blades about the respective third axes; and the dampers have respective second portions connected elastically to the respective first portions and functionally to each other. | 08-26-2010 |
| 20100221112 | SYSTEM AND METHOD FOR AIRBORNE CYCLICALLY CONTROLLED POWER GENERATION USING AUTOROTATION - An airborne centrifugally stiffened and cyclically controlled system which uses airfoils which rotate around a central hub, similar to the mechanics of an autogyro. The airfoils may achieve speeds significantly above the wind speed feeding the system. The airfoils may be linked to the central hub by flexible radial tethers which stiffen considerably as the speed of the airfoil increases, or may be linked to the central hub by rigid radial links. The central hub may be linked to the ground with an extendible main tether. Power generation turbines may reside on the airfoils and utilize the high apparent wind speed for power generation. The generated power may travel down the radial tethers and across a rotating power conduit to the main tether and to the ground. The system may use autorotation, similar to the mechanics of an autogyro. Power generation turbines may reside on the blades and utilize the high apparent wind speed for power generation with little or no need for gearing between the generator blades and the generator. | 09-02-2010 |
| 20110142642 | WIND TURBINE ROTOR BLADE WITH AERODYNAMIC WINGLET - A wind turbine includes a plurality of rotor blades, with each blade having a root portion connected to a rotor hub and an airfoil portion extending radially outward from the rotor hub. The airfoil portion further includes a main foil section and a winglet pivotally connected to the main foil section so as to pivot from an in-line position wherein the rotor blade has a first sweep length to an articulated position wherein the rotor blade has a second sweep length. In the articulated position, the winglet may pivot to not more than 90 degrees relative to a longitudinal axis of the main foil section. A deployable sleeve may be connected to the winglet so as to extend between the winglet and the main foil section in the articulated position of the winglet. The sleeve is stowable within either or both of the main foil section or the winglet in the in-line position of the winglet. | 06-16-2011 |
| 20110236209 | BLADE DAMPER, AND A ROTOR FITTED WITH SUCH A DAMPER - The present invention relates to a damper ( | 09-29-2011 |
| 20120128490 | PRESTRESSING DEVICE HAVING CIRCUMFERENTIAL ACTIVITY - A prestressing device extending about an axis between a first plane and a second plane, the first plane being located at a predetermined distance from the second plane, each plane being perpendicular to the axis. The device includes at least three deformation areas. The deformation areas extend in the first plane. The device further includes, between each deformation area, a planar contact surface extending in the second plane. | 05-24-2012 |
| 20120230823 | Dual Spring Rate Damper - A rotor hub and method to dampen a force exerted on a rotor hub by a rotor blade during flight. The rotor hub including a central member rotatably coupled to a rotor mast, a blade grip rigidly attached to a blade and movably coupled to the central member, and an adjustable damper operably associated with the blade grip. The method includes damping the force exerted on the rotor hub with the adjustable damper and selectively adjusting the adjustable damper between a first spring rate and a second spring rate. | 09-13-2012 |
| 20130189104 | FAN WITH RESILIENT HUB - A resilient hub assembly comprises a top plate, bottom plate, central hub, and outer spars. The central hub is coupled between the top plate and the bottom plate. The outer spars are coupled between the top plate and the bottom plate, and the outer spars are positioned in a circular arrangement about a common longitudinal axis of the top plate and the bottom plate. The resilient hub assembly is configured to be flexible. The top plate and/or the bottom plate may comprise cutouts, and/or the outer spars may be positioned as to allow a gap between the central hub and the outer spars to promote flexibility. | 07-25-2013 |
| 20140023503 | DAMPER UNIT FOR VESSEL PROPULSION APPARATUS, PROPELLER FOR VESSEL PROPULSION APPARATUS, AND VESSEL PROPULSION APPARATUS - A damper unit includes a first damper arranged to transmit a torque around a rotation axis transmitted from an input member side to an output member side, an intermediate member arranged to transmit a torque around the rotation axis transmitted from the first damper to the output member side, and a second damper arranged to transmit a torque around the rotation axis transmitted from the intermediate member to the output member side, wherein at least a portion of the second damper is disposed on a straight line that passes through the first damper and is parallel or substantially parallel to the rotation axis. | 01-23-2014 |
| 20140147276 | SYSTEM FOR DAMPING VIBRATIONS IN A TURBINE - A system for damping vibrations in a turbine includes a first rotating blade having a first ceramic airfoil, a first ceramic platform connected to the first ceramic airfoil, and a first root connected to the first ceramic platform. A second rotating blade adjacent to the first rotating blade includes a second ceramic airfoil, a second ceramic platform connected to the second ceramic airfoil, and a second root connected to the second ceramic platform. A non-metallic platform damper has a first position in simultaneous contact with the first and second ceramic platforms. | 05-29-2014 |
| 20140377069 | PITCH BEARING ASSEMBLY WITH STIFFENER - A pitch bearing assembly for a wind turbine having a stiffener is disclosed. The pitch bearing assembly may include an outer race and an inner race rotatable relative to the outer race. The inner race may define a mounting surface and an inner circumference. The mounting surface may extend generally perpendicular to the inner circumference. In addition, the stiffener may include a body and a mounting flange. The body may extend axially within a volume defined by the inner circumference of the inner race. Further, the mounting flange of the stiffener may be coupled to the mounting surface of the inner race. | 12-25-2014 |
| 20160017728 | VARIABLE-PITCH VANE - A variable-pitch vane comprising: a plurality of propeller blades ( | 01-21-2016 |
| 20160108889 | BLADE ANGLE CONTROL APPARATUS OF WIND POWER GENERATOR AND WIND POWER GENERATOR HAVING SAME - An apparatus for controlling a blade angle of a wind power generator according to wind velocity, and a wind power generator having the same, the apparatus comprising: a shaft; a housing provided to enable the rotation of the shaft; and a spring having ends fixed respectively to the shaft and the housing to store elastic energy through the relative rotation of the shaft and the housing, and enables the relative rotation in the reverse direction so as to restore the shift and the housing to the original states when the power necessary for the relative rotation is released, wherein one of the shat and the housing is fixed at a blade provision unit provided to rotate the blade by using wind pressure and the other is fixed at the blade. | 04-21-2016 |
| 20160200431 | COMPOSITE STIFFENED RIGID PROPELLER SHAPED MAIN ROTOR HUB | 07-14-2016 |
| 416136000 | Rotary working member pivotable solely about radial axis | 1 |
| 20100239421 | CONTROLLABLE PITCH BLADE NON-DUCTED PROPELLER FOR JET ENGINE - Controllable pitch blade non-ducted propeller for a jet engine, comprising a rotor member comprising radial housing for mounting blade support plates, each plate being attached in a ring centered and guided in rotation in a housing of the rotor member and comprising external toothing engaged and locked in internal toothing of the ring, to withstand the centrifugal forces to which the propeller blades are subjected in operation. | 09-23-2010 |
