Lifting device has control unit that is coupled for limiting the movement of movable wall portion, and primary and secondary chambers that are filled with an incompressible fluid from closed-force-feedback fluid system

摘要

The lifting device (1) has a lifting unit (5) with force-to-pressure transducer (46) that is arranged between driving portion and load-carrying section and is provided with a load-dependent variable-volume primary chamber. A control valve unit is provided with a pressure-force converter. The primary chamber is fluid-communicated with a variable-volume secondary chamber. A control unit is coupled for limiting the movement of the movable wall portion. The primary and secondary chambers are filled with an incompressible fluid from a closed-force-feedback fluid system (54).