Vivier

Claim 1

A HYDRAULIC INSTALLATION CONNECTED TO TWO SUPPLY ORIFICES OF A HYDRAULIC MOTOR ACTUATING A VEHICLE, ACCOMPLISHING AUTOMATICALLY THE CONTROL OF THE ACCELERATION AND DECELERATION OF THE VEHICLE DURING BRAKING, REVERSAL OF DIRECTION AND DOWNHILL TRAVEL, INCLUDING A COMPRESSED LIQUID DISCHARGE LINE AND A LIQUID RETURN LINE, A MANUALLYOPERATED DIRECTION REVERSER CONNECTED TO THESE TWO LINES, TWO SUPPLY LINES TO THE HYDRAULIC MOTOR CONNECTING THE DIRECTION REVERSER TO THE TWO SUPPLY ORIFICES OF THE MOTOR AND, IN EACH OF SAID TWO CONNECTING LINES FROM THE DIRECTION REVERSER TO THE TWO SUPPLY ORIFICES OF THE MOTOR, A BRAKING VALVE, MEANS BY-PASSING SAID BRAKING VALVE, A NON-RETURN VALVE MOUNTED IN SAID BY-PASS MEANS AND OPPOSING BACKFLOW OF THE LIQUID TOWARD THE DIRECTION REVERSER, A PRESSURE REGULATOR MOUNTED IN SAID LINE BETWEEN SAID BRAKING VALVE AND THE HYDRAULIC MOTOR IN ORDER TO PREVENT PRESSURE OF THE LIQUID AHEAD OF THE SUPPLY ORIFICE OF THE MOTOR CONNECTED TO SAID SUPPLY LINE FROM RISING ABOVE A LIMITING VALUE, A PILOT LINE FOR SAID BRAKING VALVE CONNECTING SAID BRAKING VALVE TO THE OTHER MOTOR SUPPLY LINE UPSTREAM FROM THE BRAKING VALVE MOUNTED IN THE OTHER MOTOR SUPPLY LINE, SAID PILOT LINE CONTROLLING THE CLOSING OF THE BRAKING VALVE OF THE FIRST SUPPLY LINE WHENEVER THE OTHER SUPPLY LINE IS NOT UNDER PRESSURE, AND A MEANS CONTROLLED BY THE DRIVER OF THE VEHICLE, FOR SETTING THE DESIRED VALUE OF LIMITING PRESSURE PERMITTED BY SAID PRESSURE REGULATOR.