Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 651 - 700 out of 1,843

Document Document Title
WO/2008/142498A1
A variable-diameter rotor comprises a hub with a shaft and rotor blades mounted on the hub, wherein each one of the rotor blades comprises a radially internal blade part (6), which is radially stationary, and a radially external blade pa...  
WO/2008/144228A2
A flight control system and method which determines an expected power required data in response to a flight control command of the at least one model following control law and utilizes the expected power required data to perform at least...  
WO/2008/118637A3
A governor configured, to regulate the rotational velocity of one or more rotors (14) of an aircraft (12) by adjusting a collective blade pitch of the one or more rotors. In one embodiment, the governor (30) comprises a control monitor (...  
WO2008079553B1
Pairs of oscillating wind paddles are mounted in the lee of a wind turbine of the lift type An oscillating wind paddle assembly has upper and lower pairs of paddles, each pair moving between a first position at substantially right angles...  
WO/2008/048245A3
A flight control system for a helicopter having a main rotor and a tail rotor is provided. The flight control system includes an automatic rotor speed control being configured to transition the main rotor and the tail rotor between a hig...  
WO/2008/127362A2
A system (10) for balancing an aircraft propeller (12) system receives a vibration signal from the aircraft propeller system and determines whether the vibration signal indicates a transient vibration condition. If it is determined that ...  
WO/2008/096124A3
A method of operating a counter-rotating propeller engine having front and rear propellers. The engine is operated during at least a take-off, a climb, a cruise and an approach phase; during the cruise phase the engine operates with a ge...  
WO/2008/118637A2
A governor configured, to regulate the rotational velocity of one or more rotors (14) of an aircraft (12) by adjusting a collective blade pitch of the one or more rotors. In one embodiment, the governor (30) comprises a control monitor (...  
WO/2008/079553A3
Pairs of oscillating wind paddles are mounted in the lee of a wind turbine of the lift type An oscillating wind paddle assembly has upper and lower pairs of paddles, each pair moving between a first position at substantially right angles...  
WO/2008/105704A2
A propeller (1) having n blades (2) where n is an integer larger than 0. The propeller (1) having a surface (3) which is described as composed of n identical units (6). Each identical unit (6) is a mathematical minimal surface.  
WO/2008/096124A2
A method of operating a counter-rotating propeller engine having front and rear propellers. The engine is operated during at least a take-off, a climb, a cruise and an approach phase; during the cruise phase the engine operates with a ge...  
WO/2008/087443A1
A composite blade assembly is disclosed including a composite blade or aerofoil (2) and a root member (1). One end of the blade (2) extends along the root member (1) and is secured therewith. The blade (2) includes a plurality of layers ...  
WO/2008/081098A1
The invention relates to a rear tail assembly (1) for an aircraft, including a fuselage (3), a wing (2) and at least one propulsion engine (5, 5a, 5b) attached in the rear portion of the fuselage located behind the wing (2) along the X l...  
WO/2008/065647A1
There is provided a self torque-balancing differential mechanism (2), including two coaxial counter- rotating wheels (4, 6), rotatable about a central shaft (24), mutually reacting and balancing a torque of a motor drive (20) interacting...  
WO/2008/032125A3
A propulsion assembly comprising a hub (101), a plurality of fins (3) moveably connected to the hub such the dihedral angle of each fin can be controlled over a working range, a first shuttle (453) and a second shuttle (443), each moveab...  
WO/2008/053230A1
According to one embodiment of the present invention, there is provided a propeller blade assembly comprising a hub (1) with a plurality of recesses (15) and a plurality of propeller blades (3) of composite construction having one end se...  
WO/2008/048279A2
A device for controlling the pitch of a helicopter's rotor blade, the device having a BLDC motor based actuator; and at least one control surface operatively connected to the BLDC motor based actuator. The actuator and the control surfac...  
WO/2008/032125A2
A propulsion assembly comprising a hub (101), a plurality of fins (3) moveably connected to the hub such the dihedral angle of each fin can be controlled over a working range, a first shuttle (453) and a second shuttle (443), each moveab...  
WO/2007/142666A3
A hub joint (10) for supporting bearings adapted to rotatably receive a shaft. The joint includes an upper annular portion (18) having a radially inner boundary (20) and an upper bearing mount (30) attached to the inner boundary of the u...  
WO/2008/001299A3
An adjusting apparatus (9) for adjusting the pitch angle of propeller blades (1, 2, 3, 4, 5, 6, 7, 8) of a variable-pitch propeller - in a first blade pitch-angle range with positive pitch angles at which the propeller blades (10) produc...  
WO/2007/147177A3
The invention provides a blade (40) for a wind generator (10) which includes a connection member (60) which is connectable to a generator (26), an elongate, flexible blade body (62) which has a first elongate aerofoil section (70) which ...  
WO/2007/079020A3
Disclosed is a hub of an axial fan. The hub includes primary fan blades and splitter blades disposed between pairs of the primary fan blades. The resulting hub has been observed to reduce tonal noise during fan operation.  
WO/2008/001299A2
An adjusting apparatus (9) for adjusting the pitch angle of propeller blades (1, 2, 3, 4, 5, 6, 7, 8) of a variable-pitch propeller - in a first blade pitch-angle range with positive pitch angles at which the propeller blades (10) produc...  
WO/2007/147177A2
The invention provides a blade (40) for a wind generator (10) which includes a connection member (60) which is connectable to a generator (26), an elongate, flexible blade body (62) which has a first elongate aerofoil section (70) which ...  
WO/2007/142666A2
A hub joint (10) for supporting bearings adapted to rotatably receive a shaft. The joint includes an upper annular portion (18) having a radially inner boundary (20) and an upper bearing mount (30) attached to the inner boundary of the u...  
WO/2007/111532A1
The invention relates to devices for converting mechanical energy in a fluid medium, can be used in the form of water and air screws for engines and propulsers and makes it possible to simplify the production method of propeller blades, ...  
WO/2006/130287A3
A rotor hub fairing system includes an upper hub fairing, a lower hub fairing and a shaft fairing therebetween. The rotor hub fairing system is sized and configured to reduce the overall drag on a dual, counter-rotating, coaxial rotor sy...  
WO/2006/086462A3
A method for governing the speed of a fluid turbine by establishing a circulating flow and a rotational flow with a rotor, and interrupting the rotational flow with an opposing stator. A related braking apparatus includes a housing, a ro...  
WO/2007/071924A3
A propeller comprises a hub (1) having a pair of blades (3) extending therefrom. Each blade (3) has a root, a tip, a first blade portion (10a) extending between said root and said tip and a second blade portion (10b) extending between sa...  
WO/2007/079020A2
Disclosed is a hub of an axial fan. The hub includes primary fan blades and splitter blades disposed between pairs of the primary fan blades. The resulting hub has been observed to reduce tonal noise during fan operation.  
WO/2007/071924A2
A propeller comprises a hub (1) having a pair of blades (3) extending therefrom. Each blade (3) has a root, a tip, a first blade portion (10a) extending between said root and said tip and a second blade portion (10b) extending between sa...  
WO/2005/099380A3
This invention relates generally to a lift augmentation system for an airframe. More particularly, the invention concerns the combination of extendable/retractable wing tips with an airframe for lift augmentation as well as wings that ca...  
WO/2007/010329A1
An aerodynamic profile and a wind turbine comprising a wind turbine blade with reduced sensitivity towards surface irregularities are provided. The invention is mainly directed towards pitch-regulated wind turbines, which are operated at...  
WO/2007/007029A1
A helicopter (2) comprising a body portion (4), a plurality of rotor blades (6) which are mounted for rotation with respect to the body portion (4), and a fan (8) which is mounted for rotation in an opposite direction to the direction of...  
WO2005105698A8
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a gypsum based dry mortar composition wherein the amount of the cellulose ether in the gypsum based dry mortar composition is si...  
WO/2006/133363A2
An impeller assembly is for a fluid machine, such as a compressor, and includes a first, main body and a second body. The main body includes a first section providing at least a substantial portion of either an impeller disc or an impell...  
WO/2006/130287A2
A rotor hub fairing system includes an upper hub fairing, a lower hub fairing and a shaft fairing therebetween. The rotor hub fairing system is sized and configured to reduce the overall drag on a dual, counter-rotating, coaxial rotor sy...  
WO/2006/116072A1
A cross-flow propulsion mechanism (10) for use in providing propulsion to an aircraft, includes a housing (11) defining an inlet (12), a rotor compartment (14), and an outlet (18). The inlet (12) is adapted to receive an inflow of air al...  
WO2005063563A8
According to an embodiment of this invention, a plurality of stops are implemented between metal surfaces that may be reached only in the event of shocks of great violence and in any case following a certain elastic deformation of the sh...  
WO/2006/086462A2
A method for governing the speed of a fluid turbine by establishing a circulating flow and a rotational flow with a rotor, and interrupting the rotational flow with an opposing stator. A related braking apparatus includes a housing, a ro...  
WO/2006/066561A1
The invention relates to a flying device which can efficiently move in the air by aerodynamic forces and by direct force transmission on the ground, without the need for independent drive and thrust generation systems for the two modes o...  
WO2005042342A3
Method and systems for starting propeller driven aircraft and other devices. A system in accordance with one embodiment of the invention includes a removable fixture (130) that is coupled to the propeller (120) and has at least one porti...  
WO/2006/063572A1
The invention relates to a propeller blade bearing, especially for the propeller blades (2) of aircraft propellers that can be adjusted along their longitudinal axis, a plurality of propeller blades (2) being individually fastened on a p...  
WO/2006/055580A2
A rotor blade includes a removable blade tip section which is mounted to an outboard rotor blade section by mechanically mounting a tip spar to a main blade spar with a spar interface section which bridges a butt joint between the blade ...  
WO/2006/033594A1
The invention relates to aviation engineering, shipbuilding and wind-power engineering and can be used for air and water propellers, water-pump impellers and windwheels. The screw comprises aerodynamic blades whose end areas are provided...  
WO/2006/034158A2
An impeller according to an example of the present invention comprises a hub, and at least one blade supported by the hub. The impeller has a deployed configuration in which the blade extends away from the hub, and a stored configuration...  
WO/2006/031749A2
The method for detecting an abnormal event for process units of a fluidized catalytic cracking unit, which uses modeling steps to compare the operation of the process units to a statistical model and to an engineering model. The statisti...  
WO/2006/007768A1
The invention discloses a wrap hollow wheel utilizing wind energy and water energy and its operating device thereof. The wrap hollow wheel comprises an impeller including at least two wraps. Each wrap is curled from top of the wrap and e...  
WO/2006/006311A1
[PROBLEMS] To realize mass transport, free flight, and safe operation with saved energy by controlling the air quantity and the wind direction of a device mounted on the airframe of an aircraft and capable of freely changing both the air...  
WO2005081701A3
A blade or wing configuration has a leading edge (2) and a trailing edge (3), and an upper surface (5) and a lower surface (6) extending from the leading edge (2) to the trailing edge (3). At least one of the upper surface (5) and the lo...  

Matches 651 - 700 out of 1,843