Remotely reconfigurable high pressure fluid passive control system for controlling bi-directional piston pumps as active sources of high pressure fluid, as inactive rigid structural members or as isolated free motion devices

A bi-directional pump system for providing a high pressure liquid output, said pump system comprising:

• a first bi-directional pump having a single piston and piston rod that can translate within a single cylinder in two opposite directions, said piston separating said cylinder into two chambers, said piston displacing liquid located in each chamber when said piston is in motion due to external forces acting through said piston rod and said cylinder;
• each chamber being in liquid communication through a first valve network to a high pressure manifold, a low pressure manifold and a suction manifold, said high pressure manifold having an output for delivering the high pressure liquid to a target process and wherein said suction manifold provides a liquid input into said bi-directional pump system;
• wherein said valve network can be configured to deliver high pressure liquid from one of a single-acting pumping mode and a double-acting pumping mode, said single-acting pumping mode delivering high pressure liquid to said target process during piston motion in one of said two opposite directions and wherein said double-acting pumping mode delivers high pressure liquid to said target process during piston motion in both of said two opposite directions;
• and
• a second bi-directional pump having a respective single piston, piston rod, single cylinder having two chambers and a valve network through which said two chambers of said second bi-directional pump are in liquid communication with said high pressure manifold, said low pressure manifold and said suction manifold and wherein said valve network of said second bi-directional pump comprises a valve network isolation configuration that isolates said second bi-directional pump's cylinder from the cylinder of said first bi-directional pump, said valve network isolation configuration permitting said piston of said second bi-directional pump to be displaced in said two opposite directions without contributing to said high pressure liquid output.