A hydraulic drive system for civil engineering and construction machinery having at least one hydraulic pump driven by a prime mover, at least one hydraulic actuator connected to the hydraulic pump, and at least one hydraulic cylinder, the hydraulic actuator and hydraulic cylinder being adapted to operate movable members. The hydraulic drive system is provided with a hydraulic pump-motor coupled to the prime mover, a first conduit for connecting the hydraulic pump-motor to one side of the hydraulic cylinder which moves a movable member in a direction in ...
A hydraulic drive system for civil engineering and construction machinery including at least one hydraulic pump driven by a prime mover, at least one hydraulic actuator connected to the hydraulic pump, at least one hydraulic cylinder, the hydraulic actuator and the hydraulic cylinder being adapted to operate a plurality of movable members, and at least one other hydraulic pump driven by the prime mover and connected to the hydraulic cylinder through a directional control valve to operate an associated movable member, characterized in that the hydraulic d...
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