Patent ID: 8701834

Claim:
A mechanical actuator comprising: a motor; screw assembly comprising a housing, a threaded screw shaft disposed within said housing, a nut assembly, and an extension tube, said threaded screw shaft rotatable by said motor and said nut assembly arranged to move in either direction along a longitudinal axis of said threaded screw shaft when said threaded screw shaft is in rotational motion, thereby moving said extension tube between an extended position and a retracted position; a bearing assembly arranged to provide support to at least a portion of said threaded screw shaft; a first lubrication system comprising a lubrication impeller, wherein said lubrication impeller rotates at a speed no more than a rotational speed of said threaded screw shaft, the system arranged to provide lubrication to said screw assembly; a second lubrication system comprising a second set of components and arranged to provide lubrication to said bearing assembly; wherein a pathway of said first lubrication system is remote and isolated from a pathway of said second lubrication system.