Jam-tolerant actuator

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 25/20 (2006.01)

Patent

CA 2642115

An actuator (2) comprises first and second linear motion devices, each able to extend the actuator (2) and arranged such that jamming of one of the first or second linear motion devices does not preclude operation of the other. The first linear motion device comprises a first linear screw (10), a first nut (12), and a first prime mover (14) arranged to impart relative linear motion between the screw and nut. Similarly, the second linear motion device comprises a second linear screw (20), a second nut (22), and a second prime mover (24) arranged to impart relative linear motion between the second screw and nut. The first linear screw (10) may have a bore (18) in which the second linear screw (20) is accommodated when the actuator (2) is in the retracted position.

Actionneur (2) comprenant un premier et un second dispositifs de mouvement linéaire, chacun susceptible de déployer l'actionneur (2) et disposé tel que le blocage du premier ou du second dispositif de mouvement linéaire n'empêche pas le fonctionnement de l'autre. Le premier dispositif de mouvement linéaire comprend une première vis (10) linéaire, un premier écrou (12) et un premier moteur (14) configuré pour permettre un mouvement linéaire relatif entre la vis et l'écrou. De manière similaire, le second dispositif de mouvement linéaire comprend une seconde vis (20) linéaire, un second écrou (22) et un second moteur (24) configuré pour permettre un mouvement linéaire relatif entre la vis et l'écrou. La première vis linéaire (10) peut comprendre un trou (18) dans lequel la seconde vis linéaire (20) est disposée lorsque l'actionneur (2) est dans la position rétractée.

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