Patent ID: 9505106
Filing Date: 2016-11-29
CPC Classification: B25B,F15B

Claim Text:
1. A method for rotating a rotatable part by use of a hydraulic piston-cylinder drive operated by a hydraulic pressure source and having at least one piston as well as a hydraulic cylinder and a ratchet, comprising: applying a torque to the rotatable part during a loading stroke and moving the piston into a starting position via a return stroke; terminating the loading stroke when an end position of the piston is reached; and subsequently starting the return stroke; wherein the end position is a position of the piston before abutment of the piston against an end stop, wherein a current position of the piston is determined on the basis of the travel path of the piston during the load stroke, wherein the travel path of the piston during the load stroke is determined on the basis of a volume of the hydraulic fluid supplied to the hydraulic cylinder such that the current position is determined at any point along the travel path of the piston.