Patent ID: 7040215
Filing Date: 2006-05-09
Classification: B66F,F15B,Y10S

Abstract:
1. A control devise for an operating device connected to a fluid circuit, comprising: a control valve having a normal position during a lowering operation of the operating device under a load to maintain a predetermined maximum flow volume in the fluid circuit, and having a pilot control circuit; an orifice gauge in the fluid circuit connected between said control valve and one of the operating device and a tank connection, said orifice gauge having a predetermined cross section providing a control pressure differential; a pressure regulator connected to and limiting a pilot control pressure to said control valve to locate said control valve in the normal position, said pressure regulator being coupled by first and second control connections upstream and down stream, respectively, of said orifice gauge conveying the control pressure differential to actuate said pressure regulator; and a proportional pressure reducer having an output connected to said pilot control circuit and having an input connected to a connection point positioned between said control valve and the operating device.