Hydraulic cable reel drive circuit

Claim 1

IN A FLUID PRESSURE SYSTEM FOR CONTROLLING THE DRAWING IN AND PAYING OUT OF A FLEXIBLE MEMBER SUPPLYING ELECTRIC POWER TO A WHEEL MONTED VEHICLE, A FLUID PRESSURE MOTOR SUPPLYING THE POWER TO DRAW IN THE MEMBER, SAID MOTOR BEING DRIVEN AS A PUMP DURING PAYING OUT OF THE MEMBER, A MAIN PUMP, AN AUXILIARY PUMP, A FLUID PRESSURE CONNECTION FROM SAID MAIN PUMP TO SAID FLUID PRESSURE MOTIR, AN UNLOADING VALVE, A FLUID PRESSURE CONNECTION FROM SAID AUXILIARY PUMP TO SAID FLUID PRESSURE MOTOR THROUGH SAID UNLOADING VALVE, MEANS SENSING THE DIRECTION OF ROTATION OF SAID MOTOR AND EFFECTING OPERATION OF SAID UNLOADING VALVE TO EFFECT THE SUPPLY OF FLUID UNDER PRESSURE TO SAID FLUID PRESSURE MOTOR FROM BOTH O SAID PUMPS DURING OPERATION OF SAID FLUID PRESSURE MOTOR, TO DRAW IN THE FLEXIBLE MEMBER, AND TO UNLOAD SAID AUXILIARY PUMP THROUGH SAID UNLOADING VALVE WHEN SAID FLUID PRESSURE MOTOR IS DRIVEN BY SAID FLEXIBLE MEMBER, AN ELECTRIC, MOTOR FOR DRIVING SAID MAIN PUMP, AND WHEEL OPERATED DRIVE MECHANISM DRIVING SAID AUXILIARY PUMP IN ACCORDANCE WITH THE SPEED OF TRAVEL OF THE VEHICLE AND THE REQUIREMENT FOR CABLE REEL TORQUE NECESSARY TO DRAW IN CABLE ON THE REEL.