Patent ID: 7219579

Claim:
An apparatus for actuating a control surface, comprising: a first spur gear; a first drive assembly engaged with the first spur gear; a second spur gear; a second drive assembly engaged with the second spur gear; and a gear assembly mechanically capable of being coupled with the control surface and engaged with the spur gears, the gear assembly comprising: a first screw; a first gear engaged with the first spur gear; a thrust nut mounted to the first gear and threadedly engaged with the first screw; a second gear engaged with the second spur gear; a second screw mounted to the second gear and mechanically coupled with the thrust nut such that the second screw and the thrust nut rotate independently and translations of the thrust nut are transmitted to the second screw; and a translation nut threadedly engaged with the second screw and capable of being mechanically coupled with the control surface.