Patent ID: RE39158

Claim:
A hydraulic system manifold comprising: a) a body having first and second pump ports, first and second cylinder ports, first and second compensator ports and first and second supply conduits therein, the first and second supply conduits being in communication with said first and second pump ports; b) a counterbalancer in the body and in communication with said first and second supply conduits and said cylinder ports, to communicate hydraulic fluid between said first and second supply conduits and said first and second cylinder ports while counterbalancing hydraulic fluid pressure in said first and second supply conduits, said counterbalancer comprising: i) first and second cross piloted valves to permit fluid to flow from said first cylinder port to said first supply conduit and from said second cylinder port to said second supply conduit respectively; and ii) first and second check valves in communication with said first and second cross piloted valves to permit fluid to flow in directions opposite to that of said first and second cross piloted valves respectively; and c) a flow controller in the body and in communication with said first and second supply conduits and said compensator ports, to control the flow of hydraulic fluid between said compensator ports and said first and second supply conduits to supply and store hydraulic fluid in a volumetric compensator in communication with said first and second compensator ports, further comprising a volumetric compensator mount for removably mounting said volumetric compensator in communication with said first and second compensator ports . , said flow controller comprising first and second cross piloted check valves, said first cross piloted check valve being in communication with said first supply conduit and said first compensator port and said second cross piloted check valve being in communication with said second supply conduit and said second compensator port and wherein said first cross piloted check valve is actuated by a fraction of hydraulic pressure in said second supply conduit to permit fluid to flow from said first supply conduit to said first compensator port and such that said second cross piloted check valve is actuated by a fraction of hydraulic pressure in said first supply conduit to permit fluid to flow from said second supply conduit to said second compensator port.