Patent ID: 7784391

Claim:
An arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct in which the motor is connected, the motor being adapted to drive a varying load, and one or more valves ( 6 , 7 ) being adapted for controlling the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor, one of the valves consisting of a flow control valve ( 7 ) which is connected in the main duct ( 1 ) downstream of the outlet of the motor, the flow control valve ( 7 ) being integrated with the motor housing ( 50 ), the flow control valve ( 7 ) is adapted for on the one hand starting/stopping of the motor and on the other hand constant flow control of the hydraulic fluid flow through the motor and is adapted to control the flow through the main duct depending on a sensed pressure difference across a change in area ( 15 ) which is arranged in the main duct downstream of the motor.