Hydrostatic drive system for working machines e.g. excavators, has load e.g. hydraulic motor which is provided with pressure limiting device whereby pressure limiting device and feeder device are integrated in valve unit

摘要

Hydrostatic drive system has a load which is provided with pressure limiting device (11a,11b). The pressure limiting device and feeder device (12a,12b) are integrated in valve unit (10a,10b). The valve unit is formed as a combined pressure limiting and feeder valve. For increasing the reaction pressure, the valve unit stays in active contact with piston unit (20a,20b).