Hydraulic drive system

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F - Mech Eng,Light,Heat,Weapons

03

C

F03C 1/04 (2006.01) B02C 4/42 (2006.01) B02C 17/24 (2006.01) F01B 1/06 (2006.01) F03C 1/053 (2006.01) F04B 1/04 (2006.01)

Patent

CA 2158277

The invention relates to a hydraulic drive system for driving primarily heavy industrial units, where the drive system comprises a plurality of hydraulically driven piston units (14) with cam rollers (30), which are disposed to act against a wave-shaped cam profile (38) of a cam curve element (40), so that linear movement of the cam rollers (30) against the cam profile (38) produces a relative driving movement between the cam curve element (40) and the piston units (14). The characterizing feature of the invention is that the drive system is composed of separate, assembled cam curve element modules (41) and separate, assembled piston units (14), said cam curve element modules (41) being mounted on the work unit to be driven and the piston units (14) being mounted on a fixed frame (12), or vice versa.

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