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| Number | Title | Issue Date |
| 8172540 | Airfoil for a helicopter rotor blade An airfoil family for a helicopter rotor blade, designated SC362XX. SC362XX essentially removes the large lower surface suction peak associated with ‘drag creep’ at moderate lift coefficients while reducing the peak Mach number and shock strength at high lift/Ma... | 05/08/2012 |
| 8142158 | Compact load path swashplate assembly A swash plate assembly includes a rotationally stationary swash plate and rotational swash plate which rotates relative to the rotationally stationary swash plate through a bearing system. Each servo control rod is attached to the swash plate assembly to communicate... | 03/27/2012 |
| 8091862 | Butterfly valves having sleeve inserts A butterfly valve having a valve body, a butterfly shaft, a butterfly plate, and a sleeve insert is provided. The valve body is made of a first material and the sleeve insert is made of a second material. The butterfly shaft is in the valve body for rotation about a... | 01/10/2012 |
| 8043458 | Method of forming panels using an in-situ tape placement process and panels formed therefrom A composite panel and method of manufacture includes a support structure and a tape skin wound about the support structure. A mandrel assembly with extractable longitudinal mandrels facilitates winding of the tape skin onto the support structure. The composite panel... | 10/25/2011 |
| 8043053 | Self locking trim tab A trim tab assembly includes first and second shape memory alloy (SMA) actuators and a trim tab substrate which provide elastic/plastic locking in response to an induced strain actuation. ... | 10/25/2011 |
| 8042659 | Active force generation/isolation system employing Magneto Rheological Fluid (MRF) A system for reducing vibrations in a rotating system uses a variable viscosity medium that is redistributed in a housing connected to the rotating system. Specifically, the medium is responsive to a control signal that is generated as a function of rotational speed... | 10/25/2011 |
| 8038394 | System and method of damping a 1P motion A rotor system includes a multiple of rotor blade yokes mounted to a rotor hub. A lead/lag damper is mounted to each of the rotor blade yokes and to a damper hub. An actuator system is operable to shift a damper hub axis of rotation relative the rotor axis of rotati... | 10/18/2011 |
| 8032269 | Control surface failure detection for fly-by-wire aircraft A flight control system which detects a failure of a flight control surface and performs at least one action in response to the detected failure. ... | 10/04/2011 |
| 8021115 | Active force generation system for minimizing vibration in a rotating system A method and device for reducing vibratory noise in a system with an integral rotating member includes independently operable drive systems for controlling the angular velocity of at least two independently rotatable masses. Control signals manipulate the drive syst... | 09/20/2011 |
| 8015900 | Split-torque gear box A split torque gearbox system provides a multiple path, three stage power gear train that transmits torque from a high-speed engine to a low speed output shaft, while providing equal gear load distribution with a floating pinion in the second stage of reduction. The... | 09/13/2011 |
| 7999790 | Multi-functional mission grip for a vehicle A mission control grip mounted to a consol to provide a crew interface with a multitude of systems through a multitude of Multi-Functional Displays (MFDs). The mission control grip includes a fist-shaped grip movable about a first axis and a second axis, a thumb-ope... | 08/16/2011 |
| 7988089 | Swashplate trajectory control A system and method of controlling a rotary-wing aircraft includes transforming a non-rate limited servo position command into a rate limited servo position command. ... | 08/02/2011 |
| 7984146 | Aircraft health and usage monitoring system with comparative fleet statistics A Health and Usage Monitoring System (HUMS) utilizes a common architecture which permits OEM and rotorcraft operators to view and trend HUMS data for an entire aircraft fleet independent of aircraft model, HUMS vendor, or raw data format. The system operates through... | 07/19/2011 |
| 7983809 | Aircraft integrated support system (ISS) An aircraft integrated support system (ISS) downloads Integrated Vehicle Health Management System (IVHMS) data from an aircraft, processes the downloaded data to infer a status of aircraft systems and displays maintenance information via an Interactive Electronic Te... | 07/19/2011 |
| 7970498 | Model based sensor system for loads aware control laws A flight control system includes a model-based sensor system which estimates angular accelerations to control rotor system moment such that loads on the aircraft structure are reduced to thereby allow an aircraft structural envelope to more closely follow an aircraf... | 06/28/2011 |
| 7967239 | Rotor drive and control system for a high speed rotary wing aircraft A drive system for a high speed rotary-wing aircraft includes a combiner gearbox in meshing engagement with a main gearbox. The combiner gearbox is driven by one or more engines such that a main rotor system and a translational thrust system are driven thereby. The ... | 06/28/2011 |
| 7958801 | Harmonic force generator for an active vibration control system A force generator for an active vibration control (AVC) system provides a mass located upon an inner circular member which is movable within an outer circular member to simultaneously complete one revolution about its axis as it orbits within the outer circular memb... | 06/14/2011 |
| 7954766 | System and method for improved rotary-wing aircraft performance with interior/external loads An interactive aircraft load management system automates calculation and provides simulation capability to changes in an aircraft C.G. limit for display on a three-dimensional aircraft symbology. The aircraft load management system also communicates with a fly by wi... | 06/07/2011 |
| 7942365 | Variable speed transmission for a rotary wing aircraft A transmission gearbox for a rotary-wing aircraft includes a main gearbox and a variable speed gearbox in meshing engagement with the main rotor gearbox. The variable speed gearbox permits at least two different RPMs for the main rotor system without disengaging the... | 05/17/2011 |
| 7931428 | Aircraft payload retention system for interior loads An aircraft payload retention system includes a cable, a brake assembly, a hollow crushable member and a hollow structural member. The hollow structural member is fixed adjacent an aircraft internal cargo bay. In response to a high-G condition, the payload may break... | 04/26/2011 |
| 7931231 | Engine anticipation for rotary-wing aircraft 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 one action to control an eng... | 04/26/2011 |
| 7930074 | Vertical speed and flight path command module for displacement collective utilizing tactile cueing and tactile feedback A flight control system includes a collective position command module for a lift axis (collective pitch) which, in combination with an active collective system, provides a force feedback such that a pilot may seamlessly command vertical speed, flight path angle or d... | 04/19/2011 |
| 7918146 | Multi-path rotary wing aircraft gearbox A multi-path split torque gearbox system provides a multiple of three stage torque split power gear trains modules that each transmits torque from a high-speed engine to a main rotor shaft (36). The first stage bevel gear arrangement (30,32) provides a... | 04/05/2011 |
| 7909308 | Winch system for VTOL aircraft A winch system includes a cable storage system (34), a drive system (30) and a deployment system to deploy a cable having a hook system attached thereto. A right angle sheave (46) guides the cable between the cable storage system and the drive s... | 03/22/2011 |
| 7885717 | Fast control law optimization A computer-implemented method to optimize control laws (CLaws) includes inserting a unit delay downstream of at least one gain in a system model to define an extended system model and linearizing the extended system model to define an extended linear state model. On... | 02/08/2011 |
| 7881887 | Wireless wireharness testing system A system and method for wireharness testing includes at least one probe attachable to a connector of a wireharness, the at least one probe in wireless communication with a controller to identify a potential lack of continuity in the wireharness therebetween. ... | 02/01/2011 |
| 7874526 | Full authority fly-by-wire pedal system A pedal system particularly tailored to a Fly-By-Wire (FBW) flight control system includes a double gradient linkage assembly. The double gradient linkage assembly includes a damper system and a spring system that improves yaw axis (azimuth) control of the aircraft.... | 01/25/2011 |
| 7867928 | Fluid resistant composite sandwich panel A composite sandwich panel a first facing and a second facing over a core layer, the first and second facings having at least one fiberglass layer between an inner and an outer graphite layer. ... | 01/11/2011 |
| 7866600 | Integrated engine air particle filter assembly An engine air particle filter system configured to selectively receive one of at least a first tray which supports a first filter media and a second tray which supports a second filter media different than the first filter media. ... | 01/11/2011 |
| 7857260 | Fuel jettison system A fuel jettison system which provides pilot-initiated automatic operation to jettison fuel down to a 60 minute useable fuel remaining level while the manual operation, requiring the pilot to hold down the jettison panel switch, jettisons fuel down to a 20-minute use... | 12/28/2010 |
| 7854593 | Airfoil for a helicopter rotor blade An airfoil family for a helicopter rotor blade, designated SC362XX. SC362XX essentially removes the large lower surface suction peak associated with ‘drag creep’ at moderate lift coefficients while reducing the peak Mach number and shock strength at high lift/Ma... | 12/21/2010 |
| 7841829 | Rotor system with pitch flap coupling An articulated rotor system with a servo-flap rotor control system locates the focal point of a blade retention spherical elastomeric bearing inboard of a joint in the servo-flap pitch control tube which separates the flap hinge and supports the servo-flap pitch con... | 11/30/2010 |
| 7836701 | Infrared suppression system An InfraRed Suppression System (IRSS) vectors engine exhaust flow away from the exhaust manifold plane, the high aspect ratio exhaust duct defined as a ratio of a maximum nozzle length to a maximum nozzle width, the ratio greater than 2:1. ... | 11/23/2010 |
| 7823375 | Infrared suppression system An InfraRed Suppression System includes a high aspect ratio exhaust duct which vectors a high temperature engine exhaust flow. ... | 11/02/2010 |
| 7806372 | Full authority fly-by-wire pedal system A pedal system particularly tailored to a Fly-By-Wire (FBW) flight control system includes a double gradient linkage assembly. The double gradient linkage assembly includes a damper system and a spring system that improves yaw axis (azimuth) control of the aircraft.... | 10/05/2010 |
| 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 |
| 7771173 | Main rotor blade with removable tip cap A main rotor blade assembly includes a tip cap removably mountable to an outboard end section of a forward tip spar section and an aft tip spar section. ... | 08/10/2010 |
| 7762785 | Main rotor blade with integral tip section A main rotor blade assembly having a blade skin bonded to a main spar and a tip spar. ... | 07/27/2010 |
| 7762770 | Hybrid actuator for helicopter rotor blade control flaps A helicopter rotor blade that has a blade body and a control flap secured to the blade body. The rotor blade has a first primary mover capable of generating a first linear motion that is sufficient to generate a high amplitude, low frequency motion of the control fl... | 07/27/2010 |
| 7758312 | Main rotor blade with integral tip section A main rotor blade assembly includes a tip spar which defines a tip spar non-straight form, an upper blade skin which defines an upper blade skin non-straight form adjacent to the tip spar non-straight form and a lower blade skin which defines a lower blade skin non... | 07/20/2010 |
