| 摘要 |
<p>PURPOSE: To reduce the consumption of a hydraulic fluid in the control circuit of a jack by recovering the energy of the discharged fluid when the pressure of the double acting fluid jack exceeds a prescribed value. CONSTITUTION: Auxiliary circuits 50, 120, 122 which interrupt the communication between a controlled chamber and a reservoir 25 and the communication between a control chamber and pressure fluid sources 20, 26 and communicate the controlled chamber and the control chamber when the fluid pressure in the controlled chamber of a jack 10 reaches a prescribed value are provided in the middle of distributing systems 28, 28', 52, 52' which communicate two chambers 14, 16 of the jack 10 to the pressure fluid sources 20, 26 or the reservoir 25 in turn.</p> |
