Class 244/39 - Rotatable

Subclass of Class 244 - Aeronautics and astronautics
Definition: Sustaining airfoils rotatable or capable of being moved
No. of patents: 55
Last issue date: 01/25/2011

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Number	Title	Issue Date
7874514	Amphibious aircraft A multi-wing, multi-engine, multi-hull amphibious aircraft is disclosed. In the illustrative embodiment, the aircraft has an open frame structure without a fuselage. ...	01/25/2011
7441724	System and method for controlling a roll rate of a torsionally-disconnected freewing aircraft An aircraft includes a fuselage, and first and second freewings. Each of the first and second freewings is separately mounted to the fuselage and independently freely pivotable about respective pivot axes. The aircraft includes an angular rate sensor configured to m...	10/28/2008
7357358	Aircraft leading edge device systems and corresponding sizing methods Aircraft leading edge device systems and methods for sizing such systems are disclosed. In one embodiment, a spanwise lift coefficient distribution for an airfoil corresponding to at least one design condition and at least one aircraft angle of attack is identified,...	04/15/2008
7294036	Flying disc A circular planform wing includes a contiguous thin central plate having top and bottom surfaces. An outer annular rim encompasses the central plate. The rim has a lower edge defining a lower plane of the wing, and the central plate has an upper zone defining an upp...	11/13/2007
7246770	Aircraft with rotatable leading edge of fuselage and wings A rotatable leading edge for the fuselage and wings of an aircraft is disclosed. The leading edge may be rotated from an undeflected or retracted position adjacent to the fuselage and wings to a deflected or extended position. In the extended position, the leading e...	07/24/2007
7204454	Aircraft with articulated leading edge of fuselage and wings An articulated leading edge for the fuselage and wings of an aircraft is disclosed. The leading edge may be moved from an undeflected or retracted position adjacent to the fuselage and wings to a deflected or extended position. The leading edge includes fuselage and...	04/17/2007
7165742	Aircraft spiralling mechanism - B An aircraft 1 with a spiral inducing assembly 2 which is capable of inducing the aircraft to travel in a continuous spiralling motion without the aircraft rolling. Two fins 6 and 17 are attached to a tube 3 that is able to rotate a...	01/23/2007
7165746	Vibration motor primary flight control actuator The invention provides an actuator for a control surface (7), in particular for a primary flight control of an aircraft, the actuator including a main actuator (3) in a main control line (1) for actuating the control surface (7), the actu...	01/23/2007
7131611	Device and method of control of fixed and variable geometry rhomboid wings Provided is an aerodynamic body having rhomboid wings and internal torsion bars which can be twisted to affect a change in the shape of a wing. Individual or multiple swings can slide relative to the fuselage body to affect a change in sweep angle and aspect ratio. ...	11/07/2006
7121503	Better balanced canard airplane with forward engine To optimize the performance of a canard airplane with an engine in front, the canard is mounted forward of its location in existing canard airplanes. Specifically, the canard is located with its leading edge significantly ahead of the firewall. This allows the canar...	10/17/2006
7093791	Aircraft spiralling mechanism—c An aircraft 1 with a spiral inducing assembly 2 which is capable of inducing the aircraft to travel in a continuous spiralling motion without the aircraft rolling. Two fins 6 and 17 are attached to a tube 3a that is able to ...	08/22/2006
7014142	Low-drag rotor/wing flap Rotor/wing aircraft having a low-drag flap are disclosed. In one embodiment, a rotor/wing aircraft includes an elongated blade having a body portion and a flap portion. The body portion has first and second edges and includes a non-symmetric portion proximate the se...	03/21/2006
6926229	Aircraft with thrust vectoring for switchably providing upper surface blowing Aircraft having thrust vectoring for switchably providing upper surface blowing. The aircraft generally includes a wing and an engine. The engine can be rotatably supported to supporting structure to allow the engine to be controllably rotated relative to the wing, ...	08/09/2005
6712313	Constant velocity drive rotary-wing aircraft rotor with torque splitting differential A constant velocity drive mechanism of a rotary-wing aircraft rotor, comprises a torque splitting differential mechanism, comprising a driving disc integral in rotation with a rotor mast and connected to each of two driven discs either side of the driving disc, by a...	03/30/2004
6708923	Aircraft spiralling mechanism An aircraft 1 in the form of an airplane with a spiral inducing assembly 2 which is capable of inducing the airplane to travel in a continuous spiralling motion without rolling. Two fins 3 and 4 are attached to a tube 5 that is abl...	03/23/2004
6669138	Rotary aeronautical lifting cell A rotary aeronautical lifting cell having an annular airfoil, airfoil dividers, and a propulsion mechanism. The airfoil dividers separate the annular airfoil into airfoil sections arranged in circular relationship. Upon rotation of the present aeronautica...	12/30/2003
6601795	Air vehicle having scissors wings An air vehicle, such as an aircraft, an unmanned air vehicle, a missile, or an aero bomb that has a fuselage and two main wings each of which has a left side wing and a right side wing. Both of the main wings are rotatably mounted on the fuselage via one ...	08/05/2003
6513762	Flap actuator system A flap actuator system for an airfoil structure including: a flap member for controlling the airfoil structure; a bearing member interconnected with the flap member and the airfoil structure; and an actuator device for rotating the flap member about the b...	02/04/2003
6497385	Rotor blade with optimized twist distribution A rotor blade has a local geometric twist angle θ=.function.(r/R), with R being the blade span and r being the distance along the blade span from the axis of rotation. The blade has an inner region between an (r/R)inner =0.20&#b1;0.04 and a tr...	12/24/2002
6457671	Funneled rotary foil A funnel strip is added to a rotary airfoil, which utilizes the Bernoulli principle to increase the velocity of air over the suction side of the rotating airfoil to increase the lift. The device is applicable to thrust-producing devices, such as propeller...	10/01/2002
6382557	Permanently rotating free aerostat mobile in radial translation relative to ambient air The invention concerns a free lighter-than-air aerostat comprising a structure (1, 3, 4, 5) symmetrical relative to a main axis (2), at least one main sealed pressurized chamber (16), one or several particle emitting thrusters (8), adapted to drive the ae...	05/07/2002
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
6267331	Airfoil with dynamic stall control by oscillatory forcing A method for inhibiting dynamic stall of an airfoil by causing a fluid to flow out of at least one location on the airfoil. This location may be anywhere on the airfoil; but if the location is within one-quarter of the airfoil chord from the leading edge ...	07/31/2001
6260809	Ovate loop for rotary-wing blades Blade vortex interaction (BVI) noise, associated with the operation of aircraft having rotary-wing blades, is abated by the inclusion of an ovate loop tip (20) at the tip portion (16) of each of the rotary wing blades. The ovate loop tip (20) is substanti...	07/17/2001
6086016	Gyro stabilized triple mode aircraft A triple mode aircraft which can take off as a helicopter, or in gyrocopter mode with no power to the rotors or as a conventional aircraft obtaining lift from a circular wing and in another embodiment from short stub wings; a canard wing and high lift tai...	07/11/2000
6047924	Method of folding the blades of a main rotor of a rotary-wing aircraft, and apparatus for implementing the method Once the rotor of a rotary-wing aircraft is held stationary in an indicated position, the method comprises steps consisting in placing the collective pitch control stick in a first predefined position corresponding to a first inclination of the blades abo...	04/11/2000
6032899	Blade pitch locking device for a main rotor of a rotary-wing aircraft The present invention relates to a device for locking the pitch of the blades of a main rotor of a rotary-wing aircraft in which each blade is firstly rotated about an axis of rotation of the rotor by a rotor mast and is secondly constrained to pivot abou...	03/07/2000
6030177	Drive system for a variable diameter tilt rotor A drive system for a variable diameter rotor system that includes a plurality of rotor blade assemblies with inner and outer blade segments. The outer blade segment being telescopically mounted to the inner blade segment. The drive system engaging a jacks...	02/29/2000
6029930	Method of monitoring a transmission assembly of a vehicle equipped with acceleration sensors, in particular a helicopter The monitoring method includes the steps of: acquiring a signal from an acceleration sensor; calculating a transform in the frequency domain of the signal to obtain a sequence of samples; acquiring a sample in the sequence of samples; calculating an actua...	02/29/2000
6024324	Method of monitoring an epicyclic assembly of a vehicle equipped with acceleration sensors in particular a helicopter The monitoring method includes the steps of: acquiring a signal from an acceleration sensor associated with an epicyclic assembly; sampling the signal at a predetermined sampling frequency to obtain an initial sequence of samples; dividing the samples in ...	02/15/2000
6019578	Variable diameter rotor blade actuation system A rotor blade actuation system is disclosed for controlling extension and retraction of an outboard blade section of a rotor blade by varying the speed and direction of rotation between a main rotor shaft and a blade actuation shaft. The rotor blade actua...	02/01/2000
6016994	Method of monitoring a transmission assembly of a vehicle equipped with acceleration sensors, in particular a helicopter The monitoring method includes the steps of: acquiring a first signal from an acceleration sensor; calculating a transform in the frequency domain of the first signal to obtain an initial sequence of samples, each of the samples having a respective amplit...	01/25/2000
5984230	Wing assemblies for aircraft A rotary wing having a spar that flexes and crosses the axis of the spar in two or more points. The spar mounts two adjacent flying surfaces extending spanwise and rotatable about the longitudinal axis of the spar without the transmission of flexural move...	11/16/1999
5863013	STOL/VTOL free wing aircraft with improved shock dampening and absorbing means An improved VTOL/STOL free wing aircraft providing damping and absorption of shock landing loads upon landing. A pair of resilient struts is provided, projecting forwardly from the trailing edge of either side of the fuselage when the fuselage is tilted. ...	01/26/1999
5810286	Lighter-than-air aircraft A stable and highly maneuverable lighter-than-air aircraft is provided. The aircraft includes a body portion which is supported beneath a balloon portion by a stem or axle. The balloon is fillable with a lighter-than-air gas and is sized to accept suffici...	09/22/1998
5722615	Transport airplane with front empennage Airplane (1) including a mainplane (3), elevator aerodynamic surfaces (4) and a front canard empennage adjustable in orientation. This airplane includes: a device for calculating (14) continuously receiving measurements: of the speed (V) of the airplane with r...	03/03/1998
5671898	Aircraft having fixed and pivotal wings An aircraft having variable airframe geometry includes an elongate fuselage having top and bottom sides, a swept back, high-speed wing mounted to the top of the fuselage, and a high aspect ratio, low-speed wing pivotally mounted adjacent to the bottom of ...	09/30/1997
5642867	Aerodynamic lifting and control surface and control system using same An aerodynamic lifting and control surface comprising an external box structure that encloses an internal grid whose members are parallel to the box structure. The external box structure comprises four panels connected at their comers by spring hinges. Wh...	07/01/1997
5395073	STOL/VTOL free wing aircraft with articulated tail boom A VTOL/STOL free wing aircraft includes a free wing having wings on opposite sides of a fuselage connected to one another respectively adjacent fixed wing inboard or center root sections fixedly attached to the fuselage for free rotation about a spanwise ...	03/07/1995
5340057	Thrust vectoring free wing aircraft The VTOL aircraft includes a free wing having wings on opposite sides of the fuselage connected to one another for joint free rotation and for differential pitch settings under pilot, computer or remote control. On vertical launch, pitch, yaw and roll con...	08/23/1994

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Class 244/39 - Rotatable