Patent ID: 9017419
Filing Date: 2015-04-28
Classification: A61F,F16H,H02K,Y10T

Abstract:
1. An actuator, comprising: an electric motor comprising stator windings; an elongate rotor, the rotor having an upper internally threaded portion and a lower internally threaded portion; a first screw that extends along a longitudinal axis of the actuator, the first screw having a first externally threaded portion to operatively engage the upper internally threaded portion of the rotor; a second screw that extends along the longitudinal axis of the actuator and is configured to move along the longitudinal axis relative to the motor, the second screw having a second externally threaded portion to operatively engage the lower internally threaded portion of the rotor, the first and second screws extending from opposite sides of the motor; and an elongate magnet operatively coupled to the rotor and radially interposed between the first and second screws and the motor; wherein the motor is disposed circumferentially about at least a portion of the rotor and first and second screws, the motor configured to axially displace one or both of the first and second screws via the magnet.