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| Number | Title | Issue Date |
| 8141813 | Helicopter A helicopter having a rotor, a fuselage, and a transmission connected functionally to the rotor; the helicopter has a supporting body supporting at least the transmission, and connecting means having a first connecting member and at least one second connecting membe... | 03/27/2012 |
| 7857255 | Helicopter with an improved vibration control device A helicopter having a rotor, a fuselage connected to the rotor by connecting means, and a control device for controlling vibration of the fuselage; the control device including generating means for generating signals associated with vibration of the fuselage, and ac... | 12/28/2010 |
| 7802755 | Rotating wing aircraft with tip-driven rotor and rotor guide-ring A helicopter includes a main rotor guided and protected in minor impacts by a guide-ring. In selected embodiments, the rotor is powered by an electric motor employing a magnetic field generator carried by the main rotor and stator coils installed on the guide-ring. ... | 09/28/2010 |
| 7798442 | Rotor assemblies having automatic blade folding systems A rotor assembly having a rotor hub, a plurality of yokes, and a plurality of swing arms is provided. The yoke depending from the rotor hub. Each swing arm is movably positioned on the rotor hub for rotation between an unlocked position and a locked position. The yo... | 09/21/2010 |
| 7631835 | Method of selectively decoupling solidborne noise, a laminated ball joint, a mechanical connection, and an aircraft Solidborne noise and vibration is decoupled in a rotary wing aircraft by a laminated ball joint (15) for a suspension bar (13) of a transmission gearbox, the ball joint including at least two damper layers (19) dedicated to a frequency band for ... | 12/15/2009 |
| 7490792 | Aircraft with rotor vibration isolation A rotor aircraft has a fuselage with a rotor mounted above by a rotor shaft. An arm is pivotally engaged with a lower portion of the rotor shaft and pivotally engaged with the fuselage, enabling the rotor to move with little restriction vertically and horizontal in ... | 02/17/2009 |
| 7472864 | Device for filtering vibration between two parts, and applications thereof A device for filtering vibration between two parts (2 and 3), includes: at least a first resilient plate (4) connected to the parts (2 and 3) at two respective fastener points at two respective po... | 01/06/2009 |
| 7434763 | Rotor/wing dual mode hub fairing system A hub fairing system (12) for a stopped-rotor aircraft (10) having a fuselage (14) including a hub (16). The hub (16) is mechanically coupled to the fuselage (14) and to multiple blades (40) and is rotated by an engin... | 10/14/2008 |
| 7370524 | Adaptive vibration control using synchronous demodulation with machine tool controller motor commutation A control system and method for actively reducing vibration in a spindle housing caused by unbalance forces on a rotating spindle, by measuring the force-induced spindle-housing motion, determining control signals based on synchronous demodulation, and provide compe... | 05/13/2008 |
| 7360994 | Method of controlling vibration damping in a helicopter, and apparatus implementing the method The present invention relates to a method of controlling a drag damper for a helicopter blade under all operating configurations of the helicopter, the method consisting in: a) measuring the elongation of the damper; | 04/22/2008 |
| 7357380 | Anti-vibration element In order to reduce the formation of inherent vibrations in the coil spring in an anti-vibration element, in particular for a manually operated tool such as a chainsaw, a parting-off grinder or similar device and having a coil spring, an additional mass is positioned... | 04/15/2008 |
| 7314124 | Vibration damping apparatus A damping apparatus for damping vibrations in a vibrating system including a piston which is reciprocally movable in a hydraulic fluid filled damper chamber, piston movement in either direction of movement being resisted by fluid pressure in the damper chamber behin... | 01/01/2008 |
| 7252267 | Aircraft archway architecture An architectural archway for an aircraft. The archways can be positioned individually, or in pairs or other sets along the length of an aircraft fuselage. The archways are used to run or connect various transport elements, such as electrical wiring, water lines, and... | 08/07/2007 |
| 7246772 | Acoustic absorption system for an aircraft interior trim panel system An acoustic absorption trim panel includes a composite core, a decoupler layer, and a mass barrier layer. By ensuring that the mass barrier layer remains limp in a limp area but in contact with the composite core through the decoupling layer, damping greater than th... | 07/24/2007 |
| 7216429 | Methods for replacement of a slotted tail rotor blade pitch horn A tail rotor assembly includes a slotted pitch horn which replaces a production non-replaceable pitch horn. A slot is cut along a leading edge of each pitch control horn and a chordwise cut is made through the upper and lower blade surface skins. The production pitc... | 05/15/2007 |
| 7207519 | Blade restraint system A blade restraint system for restraining a blade of a helicopter comprising a blade clamp releasably mounted to the blade and a pole pair releasably mountable to the blade clamp at a clamp end. The pole pair is releasably mountable to the helicopter fuselage at an a... | 04/24/2007 |
| 7198224 | Energy absorbing airframe for a vertical lift vehicle An airframe includes an energy absorbing structure with a frame, a beam mounted to the frame at a rotational joint and a collapsible member. In response to reaching a predetermined threshold load value during a high sink rate impact event, the collapsible member wil... | 04/03/2007 |
| 7178757 | Motorcycle rider autogyro An autogyro, or aircraft with a rotating wing, has an airframe providing a motorcycle-like configuration for the rider. The motorcycle-like straddle-type seat locates the rider in front of the rotating wing, behind a teardrop shaped simulated fuel tank, and above th... | 02/20/2007 |
| 7153094 | Rotor system vibration absorber A rotor system vibration absorber for use with a helicopter of other rotorcraft is disclosed in which spring forces are provided by a plurality of elongated rods arranged in a selected pattern. The rods are coupled at one end to a fixed base that is coupled to a rot... | 12/26/2006 |
| 7143973 | Avia tilting-rotor convertiplane The present invention provides a tilt rotor aircraft having a centrally mounted tiltable engine and rotor assembly. A turbine or other type of engine (or engines) is pivotally mounted on a central frame above and between the pilot and co-pilot, who occupy separate a... | 12/05/2006 |
| 7137591 | Tilting mast in a rotorcraft A rotorcraft includes a fuselage, a rotor assembly, a tail section connected to the fuselage, a propulsion system including an engine mounted to the fuselage, and a wing mounted to the fuselage. The rotor assembly includes a rotor having either a single or a plurali... | 11/21/2006 |
| 7128293 | Helicopter A helicopter has a power unit supported on an arch support member above an airframe. The power unit may be moved forward and rearward by a trim actuator to trim the helicopter and tilted about pitch and roll axes by control actuators for directional control. The con... | 10/31/2006 |
| 7118328 | Gearbox mounted force generator An active vibration control (AVC) system includes a shaft-driven gearbox mounted force generator (GMFG) mounted to a main rotor transmission. The GMFGs receive shaft power from an output shaft driven by the main rotor transmission and/or engine-to-transmission gearb... | 10/10/2006 |
| 7104372 | Damping structure and applications A damping structure includes a member defining an internal cavity; an aggregate which includes at least solid bodies in contact and which completely fills the internal cavity; a rigid plate for closing off the internal cavity; and an elastic element which exerts ela... | 09/12/2006 |
| 7086509 | Vibration isolator with adjustable response A vibration isolator with an adjustable response. A vibration isolator for isolating a vibration source from a support structure include a base in engagement with the support structure and two supports connected to the base. At least one of the supports is slidably ... | 08/08/2006 |
| 7065469 | Manufacturing apparatus and method for predicting life of a manufacturing apparatus which uses a rotary machine A manufacturing apparatus which includes a rotary machine, includes: a plurality of accelerometers configured to measure diagnosis time series data attached to the rotary machine at locations where variations of the rotary machine are different; a frequency analysis... | 06/20/2006 |
| 7017857 | Active vibration control system An active vibration control system including a sensor responsive to a source of vibration and which provides an output signal representative of the vibrations; at least one actuator positioned to impart canceling vibrations to the source of vibrations based on an in... | 03/28/2006 |
| 6971609 | Asymmetric passenger arrangement An aircraft passenger seating arrangement has at least one passenger seat within an enclosure and an aisle located within the enclosure adjacent to the seat with no seats located adjacent to an opposite side of the aisle from the seat. The enclosure has a frame with... | 12/06/2005 |
| 6945126 | Rotation sensor A rotation sensor functioning as both a rotation-angle sensor and a torque sensor is provided which, when applied to a steering sensor for an automobile, for example, permits reduction in the number of components and thus in the weight of the automobile and contribu... | 09/20/2005 |
| 6935472 | Damping structure and applications A damping structure includes a member defining an internal cavity; an aggregate which includes at least solid bodies in contact and which completely fills the internal cavity; a rigid plate for closing off the internal cavity; and an elastic element which exerts ela... | 08/30/2005 |
| 6883752 | Vibration damper for aircraft engine An internal combustion engine for an aircraft is described. The internal combustion engine includes a crankshaft defining first and second ends, a propeller, and a transmission disposed between the first end of the crankshaft and the propeller, operatively connectin... | 04/26/2005 |
| 6869375 | High output force actuator for an active vibration control system An active vibration control system provides a mass which is movable through a large excursion while minimizing the system size in two of three dimensions to compensate for sensed vibrations. A first rotating member is rotatable about a first axis and a second rotati... | 03/22/2005 |
| 6863239 | Fluid conduit for use with hydraulic actuator A fluid conduit is provided for use in a hydraulic actuating system for controlling an instrumentality disposed on a rotating portion of a machine. The fluid conduit transports pressurized fluid between a fluid source disposed on a non-rotating portion of the machin... | 03/08/2005 |
| 6824093 | Method of controlling pitch on a gyroplane and a gyroplane A method of controlling pitch on a gyroplane. A first step involves pivotally securing a wing to a mast supporting a rotor of the gyroplane. A second step involves providing a linkage between the wing and a rotor head. The linkage is secured to the rotor head with a... | 11/30/2004 |
| 6824096 | Device for controlling the pitch of the blades of a convertible aircraft rotor A pitch control device for a blade of a tilting rotor of a convertible aircraft. The pitch control device is external to a rotor hub which is driven in rotation by a mast and connected to the latter by a mechanism for tilting the hub as a whole, each blade is connec... | 11/30/2004 |
| 6816800 | Method of recording a vibration isolation system In relation to a vibration isolation system, which comprises at least one vibration isolation device that can be assigned to an isolation element, the fact that a method of recording the system with the aid of a closed-loop and/or open-loop control device is provide... | 11/09/2004 |
| 6776370 | Energy-absorbing connecting strut for use as a gearbox suspension strut for rotary wing aircraft An energy-absorbing connecting strut comprises a substantially straight rigid body with means of connection to two components which it links, and undergoing tensile/compressive stresses. The body comprising a buckling portion with a calibrated buckling load correspo... | 08/17/2004 |
| 6695254 | Rotary-wing aircraft rotor with constant velocity drive A tilting rotor of a convertible aircraft comprises, between the mast and the hub, a constant velocity drive mechanism and pivoting arrangement comprising two gimbals, each of which is driven by the mast and pivots about one respectively of two diametral ... | 02/24/2004 |
| 6676074 | Dual piston drag damper for rotary-wing aircraft rotor A drag damper for use on a rotary wing aircraft rotor comprises a body defining two variable volume chambers linked by a piston. The chambers are filled with fluid and are connected by a restriction port (35) and by a channel (32) of larger cross-section ... | 01/13/2004 |
| 6644590 | Active system and method for vibration and noise reduction An active mount is provided for use in a rotary wing aircraft between each of the gearbox and airframe mounting locations for mechanically suspending the airframe from the gearbox. The active mount comprises first and second linear hydraulic actuators eac... | 11/11/2003 |
