Patent ID: 9021797
Filing Date: 2015-05-05
Classification: F15B

Abstract:
1. A hydraulically driven arrangement for the linear movement of a mass body comprising first and second double acting operating cylinders each having a piston with a one-sided piston rod set up for interacting with the mass body in parallel relationship, the first operating cylinder being set up as a control cylinder for controlling the movement of the mass body in an acceleration phase, movement phase and brake phase, and the second operating cylinder being connected as a drive cylinder to a hydraulic power pack as an energy storage, such that the power pack during the acceleration phase of the mass body generates drive energy for the drive cylinder, and the drive cylinder in the brake phase of the mass body serves as a pump for charging the hydraulic power pack; and control circuits for controlling the control and drive cylinders by means of respective hydraulically separate and independent control valve arrangements, the control valve arrangement allocated to the drive cylinder having three control edges for connecting a small cylinder capacity of the drive cylinder with the power pack and a large cylinder capacity of the drive cylinder to the power pack, or a tank.