| 摘要 |
The double acting cylinder has a piston (14) with an internal core (24) and at least one external crown (26) which are axially movable with respect to each other. There are unidirectional stops (30) between the core and crown which are actuated so that the crown drives the core when the piston is displaced in the direction which increases the first chamber volume (16). There are limiters for the movement of the crown in the cylinder in a position beyond which the increase in the volume of the first chamber results only in a displacement of the piston core. |
