Patent ID: 6499296
Filing Date: 2002-12-31
Classification: E02F,F15B,F16H

Abstract:
Hydraulic circuit for controlling a consumer (2) of a work tool (8), including a pump (1) for supplying the consumer (2), via a supply line (14, 16), with pressure medium which may be returned to a reservoir (T) through a return line (14, 16), with a respective pilot-controlled pressure control valve (4, 4â€²) being arranged in said supply and return lines (14, 16) so that it is possible to carry off the pressure medium when a limit pressure in a low-pressure region is exceeded, characterized by a braking pressure reporting line (34) through which a pilot control valve body (62) of said pressure control valves (4, 4â€²) may directly or indirectly receive application of a pilot load pressure corresponding to the load of the work tool (8); andwherein said consumer is a hydraulic motor (2) of a rotating mechanism (10), and that the pilot load pressure is tapped at a lifting cylinder (42) of a boom (44) of a mobile work tool (8).