| 摘要 |
A device to guarantee the sequence of movement of at least two fluid-actuated displacement units. A primary displacement unit includes a cylinder (Z) with a retractable and extendable piston rod ( 4 ). Integrated into the cylinder (Z) is a directional control valve that can be controlled by the piston rod ( 4 ). The directional control valve has a closed position and an open position. The directional control valve is switched into the closed position when the piston rod ( 4 ) is not fully extended or not approximately fully extended, and into the open position when the piston rod is fully or approximately fully extended, and a compression chamber ( 1 a) of the cylinder (Z) is thereby placed in communication with a compression chamber of the secondary displacement unit (secondary cylinder 2 b).
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