Abstract: Provided is an actuator characterized by the use of a shuttle that shifts in response to an overload. The shuttle is movable axially relative to a rotary input member by continued rotation of the rotary input member so that a stop on the shuttle moves from an ambush position allowing free rotation of the rotary input member to a blocking position preventing further rotation of the rotary input member. In this way, the shuttle prevents rotation of a rotary input member during an overload of a control surface.

Abstract: A direct acting force limiting actuator wherein the actuator output force either directly or indirectly causes significant drag on a rotary input shaft rather than on the translating output member. Consequently, input energy is dissipated before the actuator gear train mechanical advantage amplifies the reaction forces.

Abstract: The present invention provides an actuator characterized by the use of a shuttle that shifts in response to an overload. The shuttle is movable axially relative to a rotary input member by continued rotation of the rotary input member so that a stop on the shuttle moves from an ambush position allowing free rotation of the rotary input member to a blocking position preventing further rotation of the rotary input member. In this way, the shuttle can be used to prevent rotation of a rotary input member during an overload of a control surface, thereby preventing damage to the actuator.

Abstract: A direct acting force limiting actuator wherein the actuator output force either directly or indirectly causes significant drag on a rotary input shaft rather than on the translating output member. Consequently, input energy is dissipated before the actuator gear train mechanical advantage amplifies the reaction forces.