Safran Electronics & Defense

Marc Lebrun

Severin Viennot

Thierry Cartry

Bertrand Sevagen

Louis Chavignier

An actuator for a flight control surface of an aircraft, including: a fixed annulus for fixing to the fuselage, an rotatable annulus with respect to the fixed annulus about an axis of rotation, an output ring which can be fixed to the control surface, and a coupling mechanism having a disc with translational mobility with respect to the mobile annulus in a direction parallel to the axis of rotation, the disc able to move between an engaged position, and a disengaged position, in which the disc is disengaged from the mobile annulus to disconnect the output ring from the mobile annulus. A retaining piece keeps the disc in the engaged position, and a rupture member activates to break the retaining piece to allow the disc to move into the disengaged position.

Aircraft flight control surface actuator

A gear device, wherein it comprises at least: a shaft provided with a sun gear; at least two coaxial rings with internal teeth, namely at least one first ring and at least one second ring having at least one first annular segment and at least one second annular segment; and planets engaging with the sun gear, the first ring, and the segments of the second ring, which segments mesh with a particular toothed relationship.

Device with two interlocked gear trains

The invention relates to an actuator () for controlling a flight control surface () of an aircraft, comprising:&#x2014;a primary route () comprising a first member () for generating a first torque, and a first drive shaft () having an end () able to be connected to the first member () and an end () able to be connected to the control surface (),&#x2014;a secondary route () comprising a second member () for generating a second torque and a second drive shaft () having an end () able to be connected to the second member () and an end () able to be connected to the control surface (), in which actuator the second drive shaft () is hollow and extends around the first drive shaft ().

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Boulogne-Billancourt, France

Marc Lebrun