Patent ID: 7819130

Claim:
A metering orifice arrangement for a hydraulic current divider and current adding device comprising: at least one metering orifice piston, each piston controlling one or more of a plurality of variable metering orifices, the variable metering orifices being located in parallel to each other for each flow direction, each of the metering orifices being arranged between a common first terminal and second working terminals, including separated interfaces, at a consumer side for a plurality of consumers, wherein a pressure prevailing in the first terminal is applied to the at least one metering orifice piston in a first direction, an adjustable pressure dividing circuit between the first terminal and the second working terminals, the adjustable pressure dividing circuit including at least two throttles for generating a control pressure lying between the pressure prevailing in the first terminal and a pressure prevailing in the second working terminals, the control pressure being applied to the at least one metering orifice piston through a control chamber in a second direction that is opposed to the first direction, and a centering spring arrangement by which the at least one metering orifice piston is centered in a central position such that the metering orifices are closed, whereby the at least one metering orifice piston is shiftable from the closed central position in opposite shifting directions to continuously open a flow cross section between the first terminal and one or more of the second working terminals independent of the shifting direction, wherein the flow cross-section of at least one of the two throttles of the pressure dividing circuit is continuously variable with the flow cross-section being adjusted to set the control pressure so that the cross-section of the variable metering orifices is varied in response to the pressure at the first terminal, and the control chamber is connected to each of the second working terminals through branch conduits, each branch conduit branching to one of the second working terminals and being in fluid communication with the continuously variable throttle and one of the variable metering orifices.