Ball cutter has swivel mounted bottom cutter with hydraulic drive with hydraulic cylinder, rotational drive, swivel cylinder and swivel motor with pulsating movement produced through two independent hydraulic pressures

摘要

The ball cutter (1) has a swivel mounted bottom cutter (4) driven by at least one hydraulic drive having a hydraulic cylinder (5), rotational drive, swivel cylinder and swivel motor. Articulated gearing is provided between the drive and bottom cutter and comprises at least two levers. Independent claim describes hydraulic cylinder with two independent hydraulic pressures. Independent claim describes hydraulic circuit for controlling drive. Independent claim describes method for producing pulsating movement of hydraulic drive through two independent hydraulic pressures.