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Match Document Document Title
8991751 Long endurance vertical takeoff and landing aircraft  
An aircraft for use in fixed wing flight mode and rotor flight mode is provided. The aircraft can include a fuselage, wings, and a plurality of engines. The fuselage can comprise a wing attachment...
8979021 Hydraulic air bleed valve system  
An air bleed valve having a housing with hydraulic fluid therein and a first acoustic wave sensor mounted within the housing so as to be covered in the hydraulic fluid and a second acoustic wave...
8876495 Case flow augmenting arrangement for cooling variable speed electric motor-pumps  
Example fluid circuits (e.g., within aircrafts) include first and second pump assemblies. The first pump assembly has an electric motor and a first fluid pump. The first fluid pump is coupled to...
8833695 Aircraft hydraulic air bleed valve system  
An aircraft hydraulic air bleed valve system having an air vent valve connected to an electronic controller where the opening of the air vent valve is permitted only when the aircraft is in a...
8249843 Predicting aerodynamic impacts for small appendages (IRCM installation) on large fixed wing aircraft using computational fluid dynamics  
A method for predicting aerodynamic impact for small appendages on aircraft, wherein the improvement comprises using an adaptable computational fluid dynamic model of airflow adjacent the...
8020379 Double redundancy electro hydrostatic actuator system  
A double redundancy electro hydrostatic actuator system includes two hydraulic pumps; two fail safe valves connected with the two hydraulic pumps, respectively; one dual tandem hydraulic cylinder...
7913955 Aircraft control surface drive system and associated methods  
A control surface drive system having a plurality of actuator assemblies are coupled to first and second supply lines and to a return line. The first and second supply lines are connected to a...
7637458 Systems and methods for providing back-up hydraulic power for aircraft, including tanker aircraft  
Systems and methods for providing back-up hydraulic power for aircraft are disclosed. A system in accordance with one aspect of the invention includes a hydraulic supply line, a hydraulic return...
7600715 Local backup hydraulic actuator for aircraft control systems  
A backup system is provided that has a local electric motor and pump for some or all of the hydraulic actuators on an aircraft. A local backup hydraulic actuator has two power sources, hydraulic...
7191593 Electro-hydraulic actuator system  
The system includes a hydraulic powered actuator. A pump system having first and second hydraulic lines is coupled to the first and second ports, respectively and is capable of providing hydraulic...
7139643 Control device with servocontrol loop, particularly an electro-hydraulic flight control actuator  
A control device includes a main servocontrol loop having a servocontrolled system, and a compensation device on the input side of the control device. The control device includes an internal loop...
7007897 Flight control actuation system  
A flight control actuation system comprises a controller, electromechanical actuator and a pneumatic actuator. During normal operation, only the electromechanical actuator is needed to operate a...
6799739 Aircraft control surface drive system and associated methods  
A control surface drive system having a plurality of actuator assemblies are coupled to first and second supply lines and to a return line. The first and second supply lines are connected to a...
6796526 Augmenting flight control surface actuation system and method  
Apparatus for providing actuation power to an aircraft flight control surface. The apparatus includes a first actuator and a second actuator, where the second actuator has a bypass mode and an...
6793177 Active drag and thrust modulation system and method  
A vehicle traveling through an environmental media such as air experiences drag. The drag is actively modulated by energy beams which may either increase or decrease the drag. The energy beams may...
6764044 Airplane spiralling mechanism  
An airplane 1 with a spiral inducing assembly 2 which is capable of inducing the airplane to travel in a continuous spiralling motion without the airplane rolling. Two fins 6 and 17 are attached...
6718762 Contingency hydraulic power unit  
An hydraulic power assembly 10 is provided, including at least one primary hydraulic power unit 20 supplying hydraulic fluid 30 to a hydraulic system 34, and a contingency hydraulic power unit 50...
6651930 Process and control system for an aircraft control surface actuated by multiple hydraulic jacks and with modular power  
Control system for a control surface (100) of an aircraft comprising at least one actuator (102, 104) of the control surface, connected to a hydraulic circuit and equipped with at least two power...
6625982 Electronically controlled hydraulic actuating system  
An electrically controlled hydraulic actuating system includes a servocontrol including a cylinder, a piston dividing the cylinder into two chambers each provided with a hydraulic connection port,...
6209825 Low power loss electro hydraulic actuator  
The system includes a hydraulic surface actuator for operating a piston coupled to a structural member of an aircraft for moving the structural member. An electrical feedback sensor is coupled to...
6189837 Auxiliary spoiler retract system  
An improvement is presented for use in aircraft that have a battery (26), a hydraulically-operated aircraft component (such as a spoiler), and a hydraulic system having a return line (R). The...
6076767 Flight control surface actuation system  
A flight control surface actuation system is provided in which a plurality of actuators (6-13) are connected to one another in order to synchronize their operation. Each actuator has its own...
6003811 Aircraft servovalve current rate limiter  
Aircraft flight path changes commanded by a pilot via the wheel, column and pedal (12) are converted to position sensor signals (14) and passed as the input to primary flight computer (26). The...
5873548 Airacraft hydraulic system for improved reliability of integrated hydraulic propulsion controls  
A system (10) is provided for maintaining continuity of hydraulic power from an aircraft engine-driven hydraulic pump (28) to a first set of propulsion control hydraulic loads for controlling the...
5600220 System for servo-controlling an aircraft flight control member  
A servo-control system for actuating an aircraft flight control member, the system including at least one hydraulic actuator together with actuation means for actuating said actuator, said...
5409188 Stability compensating mechanism of electro-hydraulic servo system  
In a stability compensating mechanism of an electro-hydraulic servo system which includes a load-displacement detecting unit for detecting a displacement of a piston of actuator or a displacement...
5351914 Hydraulic control system for aircraft  
A hydraulic control system for aircraft is disclosed, which has a flight maneuver system mounted on the aircraft and provided with a maneuver signal input and output system for controlling the...
5238207 Aircraft rudder boost system  
The invention is a proportional rudder boost system for manually controlled aircraft which also have a yaw dampening system. The boost system includes four sensors in the pilot's and copilot's...
5135186 Flutter control system for aircraft wings  
A flutter control system of an aircraft wing comprising an actuator mounted on the aircraft wing to control a control surface, flight control command unit for outputting an actuation command...
5100082 Hydraulic power supplies  
Hydraulic power supplies for aircraft which have such hydraulically operated systems as flaps, ailerons, spoilers, rudders, elevators, brakes, and retractable and steerable landing gear....
5082208 System and method for controlling an aircraft flight control member  
A control system and method for controlling a flight control member employs a hydraulic control valve which is responsive to input from the pilot in a manner to start and stop a hydraulic motor...
5074495 Load-adaptive hybrid actuator system and method for actuating control surfaces  
An actuator system for a control surface of an aircraft having a hydraulic system and a source of actuation system commands. The actuator system includes hydraulic circuits connected to the...
5033694 Attitude control device for air or sea transportation craft  
An attitude control system for controlling a plurality of attitude control devices, which cooperate to establish the attitude of a vehicle includes redundant control units for outputting attitude...
4826110 Oscillatory failure monitor  
Prevention of actuator oscillation due to failure mode in an aircraft pitch axis control system is provided by an oscillatory failure monitor. The oscillatory failure monitor provides power...
4744532 Aircraft flight control system  
Flight control system for aircraft of the type provided with ailerons, elevators, upper surface spoilers, and upper surface air-brakes, a rudder and horizontal stabilizers with variable angle of...
4667472 Electric integrated actuator with variable gain hydraulic output  
This invention relates to integrated electro-hydraulic actuators for use aboard aircraft or elsewhere. A balanced, double-acting hydraulic ram or motor (12) is connected between a support (16) and...
4615497 Method and flutter brake for an aircraft  
The invention relates to a method and an arrangement for the wings of a h speed aircraft, for increasing the flutter velocity. Aerodynamic auxiliary flaps or vortex generators are placed into an...
4461449 Integral hydraulic blocking and relief valve  
A hydraulic blocking valve for use in an aircraft flight power actuator employs a unique stepped piston design referenced to return pressure which provides pressure relief at a fixed value...
4173322 Flutter prevention means for aircraft primary flight control surfaces  
An apparatus attached to the flight control surface designed to lock the surface in a fixed and generally neutral position when a hydraulic pressure failure occurs. A spring loaded hydraulic...
3992979 Hydraulic actuating arrangements  
A hydraulic actuator arrangement has a pair of double acting actuator devices coupled together for movement in unison. Each device has two control valves respectively operable to cause the device...
3986475 Control arrangement  
An arrangement for achieving effective steering and control of any type of vehicle employing hydraulic follow-up, as, for example, the rudder of a vessel, where the components thereof are so...
3965798 Adaptive actuator system  
An adaptive actuator system comprising a rotatable shaft operatively coupled to a torque biasing means for biasing the rotational direction of the shaft, and also operatively coupled to a counter...
3915427 Fluid control system  
A fluid-powered control system of a type employing redundant control channels and multiple fluid signal amplifiers. Each fluid amplifier has two fluid outlets having communication with respective...
3794276 ELECTRO-HYDRAULIC ACTUATING SYSTEMS FOR AIRCRAFT CONTROL SURFACES  
An electro-hydraulic actuator arrangement for control surfaces on aircraft wings comprises a hydraulic servo system responsive to first and second electrical signals to move the control surfaces...
3603534 SYNCHRONIZED POWER CONTROL  
The invention is concerned with overcoming spurious operation of force limiter devices included in linkages associated with individual actuator lanes respectively controlling the portions of a...
3580139 CONTROL APPARATUS  
Conventionally, in aircraft having fluid operated servomotors for positioning the control surfaces, aircraft engine driven pumps supply the operating fluid pressures for the servomotors while the...
3561322 STABILITY AUGMENTATION SYSTEM  
A stability augmentation system is provided which has triple redundancy and is fail-functional. For each axis desired to be controlled, a hydraulic servocontrol mechanism is provided having three...
3516331 TIME MODULATED HYDRAULICALLY ACTUATED CONTROL MECHANISM  
3489889 REDUNDANT SIGNALLING APPARATUS HAVING IMPROVED FAILURE EXCLUSION  
1,204,498. Fluid-pressure servomotor systems. NORTH AMERICAN ROCKWELL CORP. Sept.28, 1967 [Sept.28, 1966], No.44273/67. Heading G3P. [Also in Division H3] A redundant multi-channel feedback...
3438306 PRELOADED SERVO ACTUATOR CONTROLS FOR REDUNDANT SYSTEMS  

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