| 摘要 |
The present invention relates a video monitor display positioning system of the type in widespread use in passenger-aircraft entertainment systems and includes a housing in which a video screen is rotatably positioned for rotation between a retracted position and an extended position, but with rotary motion provided through a hydraulic system that includes a mechanical linkage from the screen to a linear motion to rotational motion actuator subassembly which is in turn actuated by a hydraulic system that includes a cylinder, two mutually opposed, hollowed pistons, an internal spring positioned within the cavity formed by the hollow pistons, a hydraulic circuit including a hydraulic oil reservoir, an electric motor that controls a hydraulic pump, a solenoid valve and an over pressure switch. |
