Class 244/99.9 - Failure tolerant (e.g., jam tolerant, no-back control connection)

Subclass of Class 244 - Aeronautics and astronautics
Definition: Subject matter in which the control connection is constructed
No. of patents: 29
Last issue date: 04/03/2012

Number	Title	Issue Date
8146858	No-back device having malfunction detection The invention relates to a no-back device for a mobile element actuating device including a screw shaft having first and second braking means each comprising a ratchet wheel. These ratchet wheels are mounted opposite one another so that the first braking means are a...	04/03/2012
8123161	Aircraft landing gear unlock actuator This disclosure relates to a landing gear system that includes a landing gear strut rotatable between stowed and deployed positions. A lock-stay is connected to the landing gear strut and is movable between locked and unlocked conditions. An unlock actuator is conne...	02/28/2012
7883054	Jam-tolerant actuator An actuator includes first and second linear motion devices, each able to extend the actuator and arranged such that jamming of one of the first and second linear motion devices does not preclude operation of the other. The first linear motion device includes a firs...	02/08/2011
7410132	Jam tolerant electromechanical actuation systems and methods of operation In a vehicle, having a fixed supporting structure and a load movable relative thereto, a jam tolerant actuating system, a method for controlling this system including: Locating a physical coupling/decoupling mechanism between the load and an actuator assembly as clo...	08/12/2008
7350750	Control system for airbrakes of an aircraft The present invention relates to a control system for aircraft airbrakes, which comprises control means of a continuous operating mode or of an incremental operating mode in nominal operation of the airbrakes and control means of an incremental operating mode in the...	04/01/2008
7229046	Servo mounting system for direct drive of an aircraft control surface This invention is a servo mounting system, which allows a servo with a rotating output shaft to directly power an aircraft control surface. A specially designed servo mount securely positions the servo with the central axis of its rotational output shaft on, and axi...	06/12/2007
7227324	Parking brake and method for controlling the same A method for controlling an electrically actuable parking brake is described. In this method the cutoff current of the electric motor is varied to compensate for example for changes in the application force associated with aging or wear or for changes in the applica...	06/05/2007
7175133	Wing driving apparatus A wing driving apparatus is made up of a flight controller part for generating a drive signal, first and second servo actuators, a first controller unit having a first drive circuit, and a second controller unit having a second drive circuit. The first controller un...	02/13/2007
7114601	Torque transfer limiting arrangement for a rotational drive shaft A torque transfer limiting arrangement for a rotational drive shaft. The arrangement includes a torque sensing device for sensing torque within the drive shaft and outputing a signal indicative of the sensed torque. A braking device of the arrangement is actuatable ...	10/03/2006
7100870	Jam tolerant electromechanical actuation systems and methods of operation In a vehicle, having a fixed supporting structure and a load movable relative thereto, a jam tolerant actuating system, a method for controlling this system including: Locating a physical coupling/decoupling mechanism between the load and an actuator assembly as clo...	09/05/2006
6616096	Failsafe arrangement A failsafe arrangement comprising a first mounting member and a second mounting member which is angularly moveable relative to the first mounting member. The first and second mounting members define first and second surfaces respectively which define ther...	09/09/2003
6237433	Electromechanical actuator of the type having a screw-and-nut system An electromechanical actuator comprising a screw that is driven in rotation, a nut that is driven in translation by rotation of the screw, and a guide rod which is driven in translation by the nut, the actuator having a plurality of rollers interposed bet...	05/29/2001
4864882	Torque limiting arrangement A rotary to linear converter has a rotary input shaft and a linearly movable output element. A torque limiter arrests rotation of the shaft at a critical value of torque thereon. A friction device increase the torque on the shaft if a predetermined axial ...	09/12/1989
4834319	Differentially coupled dual channel actuator A dual channel actuator for regulating control surfaces of an aircraft such as a helicopter. Primary and secondary channels are coupled by a differential gear. An internal stop in the differential gear limits the short term range of travel or authority of...	05/30/1989
4779822	Actuator system In order to protect an actuator system for a movable surface in a reliable manner, while also protecting the movable surface in the event of a system failure, the actuator system includes a power drive unit connected to one end of an input shaft. An actua...	10/25/1988
4765568	Method and system for controlling the elevator assemblies of an aircraft A fly-by-wire control system for the elevator assemblies of an aircraft is quipped with a mechanical auxiliary control (8) and with a synchronizing coupling (10). The electrical control links connecting the controlling computers to the elevator drives are ...	08/23/1988
4762205	Flight control surface actuator for aircraft including remote braking failure detection An actuator system for positioning a flight control surface on an aircraft in which a primary braking device provides a continuous braking action to the actuator screw shaft by means of a load bearing disc brake wheel and a pair of rachet wheels contiguou...	08/09/1988
4762294	Elevator control system especially for an aircraft An elevator control system especially for an aircraft such as an airplane, s equipped with an electrically controllable elevator flap drive system for the elevator flap on each side of the aircraft. Additionally, the system is equipped with a mechanically ...	08/09/1988
4760907	Variable lead differential travel limiting mechanism An apparatus is provided for limiting the relative rotation between coaxial shafts, including a helical thread about one of the shafts, a nut having a follower received in the helical thread, a spline connection between the nut and other shaft, and means ...	08/02/1988
4745815	Non-jamming screw actuator system A non-jamming ballscrew actuator system which includes an inner screw, an intermediate ballscrew internally threaded on the inner screw, and an outer ballscrew nut rotatably mounted about the ballscrew. An actuator is operatively associated with a load to...	05/24/1988
4691582	Thin profile rotary actuator with backlash elimination A fluid-powered helical actuator including a body, a rotatable shaft member, first and second independently rotatable sleeves reciprocally mounted within the body, a piston reciprocally mounted in the body to produce axially movement in response to the ap...	09/08/1987
4688744	Jam tolerant rotary actuation system This invention relates to a jam tolerant rotary actuation system having multiple flight control surfaces. The actuation system includes in combination an actuation mechanism for each flight control surface. Each actuation mechanism is releaseably coupled ...	08/25/1987
4663985	Shaft relative speed limiting system In order to avoid a large torque spike in a system in the event of a system failure, a shaft relative speed limiting system includes a lost motion device and a brake. The lost motion device is operatively associated with a pair of shafts normally driven a...	05/12/1987
4633984	Braking arrangement for a rotary drive system The braking arrangement has an input shaft for connection to a drive shaft of the system. A brake device for the input shaft is urged towards operation by a spring released by an electric actuator. The input shaft is coupled to a flywheel by step-up geari...	01/06/1987
4603594	Fail safe actuator An actuator including a motor having a rotary output, an actuating arm mounted for reciprocating movement, and a mechanism, interconnecting the output and the arm to convert rotary motion to reciprocating motion. The mechanism includes a rotary element. A...	08/05/1986
4578993	Failure detection system for geared rotary actuator mechanism A failure detection mechanism for a geared rotary actuator having plural output stages. Each output stage has a planetary gearing set and the failure detection mechanism senses relative movement between planet gear shafts of adjacent planetary gearing set...	04/01/1986
4403756	Bifurcated feel simulator for aircraft A bifurcated feel unit for use in a dual path flight control system includes separate input levers for the pilot and copilot control paths. The input levers pivot about a common axis but are capable of independent rotation upon override of the breakout po...	09/13/1983
4121483	Aircraft flight control system An aircraft flight control including a linkage system having a walking beam to which control inputs are imparted and from which a control output is taken and having anti-jamming and over-control abatement provisions....	10/24/1978
3958779	Aircraft control system with a jam isolating coupling A control system including a jam isolating coupling for use in an aircraft including a plurality of related movable control members adapted to be moved in unison under normal operation conditions by appropriate separate and interconnected actuators. The r...	05/25/1976

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Class 244/99.9 - Failure tolerant (e.g., jam tolerant, no-back control connection)