Patent ID: 7640736
Filing Date: 2010-01-05
Classification: F04B,F15B

Abstract:
1. A self-contained hydraulic actuator system comprising; (a) a drive motor configured to rotate at a substantially constant velocity; (b) a hydraulic pump driven by said drive motor; (c) a hydraulic linear actuator in fluid communication with said hydraulic pump so as to be actuated in a first direction by a forward flow state and in a second direction by a reverse flow state; (d) a control system associated with said hydraulic pump, said control system configured to control adjustment of said hydraulic pump between said forward flow state, a non-flow state and said reverse flow state, and said control system includes a bi-directional motor such that a speed and direction of said adjustment is affected by said bi-directional motor; and (e) a positioning system configures to provide positional information regarding said hydraulic linear actuator.