Patent ID: 7454906
Filing Date: 2008-11-25
Classification: E02F,F15B

Abstract:
1. Hydraulic control system for controlling a hydraulic consumer actuating a working tool of a mobile equipment, comprising a control block, through a regulator of which a pump and a tank may be connected with a pressure medium delivery connected to the consumer or with a pressure medium-drain, and oscillation damping means whereby oscillations during stopping of the working tool may be attenuated by opening a connecting line between delivery and drain, characterized in that the oscillation damping means comprise two pilot-controlled shut-off valves arranged in opposite directions in the connecting line, whereby the connecting line may be opened when the pressure in the drain rises, wherein the shut-off valves may be subjected to the pressure in the delivery and in the drain, respectively, in the opening direction and also to this pressure and to the force of a spring in the closing direction, and wherein in a predetermined position of the regulator the drain-side shut-off valve may be subjected to the tank pressure or to another low pressure in the closing direction.