Patent ID: 8820345

Claim:
A construction equipment machine, comprising: a lower frame and an upper frame rotatably connected, and a hydraulic pilot circuit comprising a single hydraulic pilot line running from the upper frame to the lower frame through a rotary joint for controlling, from the upper frame, the operation of at least one hydraulic device located on the lower frame, the hydraulic pilot circuit comprising: a pressure regulating system capable of setting in the pilot circuit a pilot pressure having a value, the pressure regulating system being located on the upper frame; a hydraulic pressure controlled selecting system which is located on the lower frame and is fed by the hydraulic pilot line, at least two independent secondary pilot lines located downstream of the pressure controlled selecting system in the hydraulic pilot circuit, and wherein the hydraulic pressure controlled selecting system is arranged to selectively and independently supply or not supply pressurized fluid from the single hydraulic pilot line directly through the hydraulic pressure controlled selecting system to the at least two independent secondary pilot lines and thereby selectively supply pressurized fluid to at least three of none, only one, more than one but less than all, and all of the secondary pilot lines in response to the value of the pilot pressure.