Patent ID: 6557344
Filing Date: 2003-05-06
Classification: B29C,F04B,F15B

Abstract:
A hydraulic drive with a plurality of hydraulic consumers (10, 40, 41, 42, 43) also comprising a differential cylinder (10), in particular on a plastics injection-molding machine, having a first hydraulic machine (25), which operates as a pump and as a motor and is connected, by means of a second port (29), to a tank (30) and rests against a pressure line (19) by a first port (28), which pressure line is connectable to that working chamber (13) of the differential cylinder (10) which is remote from the piston rod via a shut-off valve (17), and having a second hydraulic machine (26) which operates as a pump and as a motor and is connected, by a first port (32), to the pressure line (19) and connectable, by a second port (33), to a tank (30) via a nonreturn valve (34) which opens toward the second port (33) and via a shut-off valve (18) to the piston-rod-side working chamber (14) of the differential cylinder (10), wherein a port of at least one further hydraulic consumer (40, 41, 42, 43) is connectable to the pressure line (19) via a directional control valve (44, 45, 46, 47).