US 9,809,301 B2
Actuator for controlling a flight control surface
Louis Chavignier, Boulogne-Billancourt (FR); Marc Lebrun, Boulogne-Billancourt (FR); and Severin Viennot, Boulogne-Billancourt (FR)
Assigned to SAFRAN ELECTRONICS & DEFENSE, Boulogne-Billancourt (FR)
Appl. No. 15/312,118
Filed by Safran Electronics & Defense, Boulogne-Billancourt (FR)
PCT Filed May 21, 2015, PCT No. PCT/EP2015/061314
§ 371(c)(1), (2) Date Nov. 17, 2016,
PCT Pub. No. WO2015/177301, PCT Pub. Date Nov. 26, 2015.
Claims priority of application No. 14 54581 (FR), filed on May 21, 2014.
Prior Publication US 2017/0088252 A1, Mar. 30, 2017
Int. Cl. B64C 13/28 (2006.01); F16H 25/20 (2006.01); F16H 25/24 (2006.01)
CPC B64C 13/28 (2013.01) [F16H 25/205 (2013.01); F16H 25/2015 (2013.01); F16H 25/2454 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An actuator for controlling a flight control surface of an aircraft, comprising:
a primary path comprising
a first member for generating a first torque, and
a first drive shaft having a first end for connecting to the first member and a second end for connecting to the control surface, the second end of the first drive shaft having first splines cooperating with splines of the control surface to connect in rotation the first drive shaft and the control surface,
a secondary path comprising
a second member for generating a second torque and
a second drive shaft having a first end for connecting to the second member and a second end for connecting to the control surface, the second end of the second drive shaft, having second splines cooperating with the splines of the control surface to connect in rotation the second drive shaft and the control surface,
wherein the second drive shaft is hollow and extends concentrically around the first drive shaft, and
the second splines extend in a continuation of the first splines so that the first splines and the second splines cooperate with the corresponding splines of the control surface.