Hydraulic Cylinder Drive System

A hydraulic cylinder drive system comprising:

• an output drive shaft for connection to a machine requiring a high torque, low speed rotational input, said drive shaft having a rotational midpoint;
• a first crank arm having a proximate end and a distal end, said proximate end rigidly connected to said output drive shaft and a first stub shaft extending from said distal end;
• a rotational drive engine;
• a fluid pump operatively connected to said drive engine;
• at least one directional fluid control valve;
• a first pair of at least one pair of double acting hydraulic cylinders having a linear axis, an extendable cylinder first end and a second end, said extendable cylinder first end rotatably connected to said first stub shaft;
• a positional sensing unit in operational connection with said crank arm, sending a first signal of said crank arm position to a programmable logic controller;
• at least one programmable logic controller receiving said first signal from said positional sensing unit arm and generating and sending a second signal to said at least one directional control valve;
• wherein said at least one directional control valve directs hydraulic fluid to said hydraulic cylinders based on said second signals;
• tubing connected between said fluid pump, said at least one directional control valve, said at least one pair of hydraulic cylinders and said reservoir so as to establish a hydraulic fluid circuit.