Messier-bugatti-dowty

Messier-bugatti Inc.

Centre National De La Recherche Scientifique

Universite Dé Lorraine

Institut National Polytechnique De Lorraine

Pierre-Yves Liegeois

Gilbert Lecourtier

Olivier Collet

Eric Felemez

S&eacute;bastien Fremiot

Dominique Perathoner

Thierry Blanpain

Eric Evenor

Daniel Bucheton

Edouard Campbell

Farid Meibody-Tabar

François-Noël Leynaert

Serge Lionel Pierfederici

Sebastien Fremiot

Babak Nahid Mobarakeh

The invention relates to a latching box for selectively retaining a movable element such as an undercarriage or a hatch in position, the box comprising a body carrying: The cam of the actuator is a cylindrical cam mounted to rotate about an axis of rotation orthogonal to the first and second pivot axes.

Latching box with an unlocking actuator having a cylindrical cam

The invention relates to an aircraft landing gear equipped with a steering device () for orienting the wheels (), the steering device () comprising a body () in which is incorporated an electromechanical actuator () equipped with an electric motor (). The landing gear is further equipped with damping means intended to limit the transmission of vibration from the wheel () to the rest of the landing gear () when the aircraft is on the ground. The body () of the steering device () is mounted with the ability to rotate with a limited amplitude of rotation. The damping means are mounted between the body () of the steering device () and the strut assembly () of the landing gear to damp the vibration between the body () of the steering device () and the strut assembly ().

Aircraft landing gear

The invention relates to a device for maneuvering, on the ground, a door of an aircraft landing gear, the door being linked with door maneuvering means and uplock means for locking the door when it reaches the closed position, at least one unlocking electromechanical actuator arranged to act upon the uplock means with a view to deactivating them during opening of the door in flight. According to the invention, the device comprises control meanswhich can be operated by an operator on the ground in order to control at least:

Device for maneuvering, on the ground, a door of an aircraft landing gear

The invention relates to an actuator including an electrical machine. The electrical actuator () comprising: a polyphase machine (); at least one connection member () for powering the actuator from at least one network () delivering alternating current; and first and second buses () connected in parallel between each connection member () and the machine () for applying frequency control thereto. Each inverter () comprises a plurality of arms each having two controlled switches, each phase of the machine () being connected both to the two switches of an arm of the first inverter () and also to the two switches of an arm of the second inverter (). The actuator further comprises controlled connection and disconnection means interposed between each bus () and each connection member. The invention is applicable to actuators used in aviation.

Electric actuator including two current-controlled voltage inverters powering an electrical machine, and reconfigurable in the presence of a defect

A telescopic actuator comprising a cylinder in which a main rod is mounted to slide telescopically along a sliding axis (X) between a retracted position and an extended position. The actuator includes an auxiliary rod mounted to slide in the main rod along the sliding axis between retracted and extended positions. A structure is provided for retaining the auxiliary rod in the retracted position inside the main rod. There also is a brake structure for braking sliding of the auxiliary rod in the main rod in the extension direction. The auxiliary rod has a thread on an outside surface, and the main rod has a rotary bearing that centers the auxiliary rod inside the main rod and co-operates via a reversible helical connection with the thread of the auxiliary rod such that extension of the auxiliary rod causes the rotary bearing to rotate.

Actuator with a main rod and an auxiliary rod

A latch device, in particular for latching an airplane landing gear or an airplane landing gear hatch, the device comprising a box containing a set of hinged elements mounted to pivot about respective parallel axes, said assembly including at least one hook and a locking lever connected to said hook by an associated elastically deformable return device, said hook being capable of being unlocked by acting on said locking lever either via first actuator device in a normal mode of operation, or via a second actuator device in an emergency mode of operation when said first actuator device fails to unlock the hook. In accordance with the invention, the second actuator device associated with the emergency mode of operation is an electromechanical actuator under independent electrical control, said actuator comprising two electric motors associated in irreversible manner with a common differential gear train, having an outlet shaft controlling the pivoting of an emergency unlocking lever co-operating with the locking lever used in normal operation.

Latch device, in particular for latching an airplane landing gear or an airplane landing gear hatch

The invention relates to a latch device, in particular for latching an airplane landing gear or an airplane landing gear hatch, the device comprising a box containing a set of hinged elements mounted to pivot about respective parallel axes, said assembly including at least one hook and a locking lever connected to said hook by associated elastically deformable return means, said hook being capable of being unlocked by acting on said locking lever either via first actuator means in a normal mode of operation, or via a second actuator means in an emergency mode of operation when said first actuator means fails to unlock the hook. In accordance with the invention, the first actuator means associated with the normal mode of operation is a low power electromechanical actuator under independent electrical control.

Growing community of inventors

Suresnes, France

Pierre-Yves Liegeois