Response controls for fluid drives

Claim 1

IN A SELF-PROPELLED VEHICLE HAVING A FRAME WITH DRIVING WHEELS CONNECTED THERETO, AN ENGINE, A MECHANICAL TRANSMISSION INTERPOSED BETWEEN SAID ENGINE AND SAID DRIVING WHEELS AND AT LEAST ONE STEERING WHEEL PIVOTALLY MOUNTED IN RESPECT TO SAID FRAME; THE COMBINATION THEREWITH OF A FLUID POWER TRANSMISSION AND CONTROL COMPRISING, A FLUID MOTOR DRIVINGLY CONNECTED TO EACH OF SAID STEERING WHEELS, A VARIABLE FLOW PUMP FOR DRIVING EACH OF SAID FLUID MOTORS, SAID VARIABLE FLOW PUMP HAVING A FLOW CHANGING MECHANISM, MEANS URGING SAID FLOW CHANGING MEACHANISM TOWARD A POSITION OF MAXIMUM PUMP FLOW, SIGNAL RESPONSIVE ACTUATING MEANS OPPOSING SAID LAST NAMED MEANS AND URGING SAID FLOW CHANGING MEACHANISM TOWARD A POSITION OF MINIMUM PUMP FLOW, A SOURCE OF CONTROL PRESSURE, A LOW PRESSURE ZONE, MEANS FOR SELECTIVELY CONNECTING SAID SIGNAL RESPONSIVE ACTUATING MEANS WITH SAID SOURCE OF CONTROL PRESSURE AND SAID LOW PRESSURE ZONE TO MAINTAIN A RELATIVELY CONSTANT PRESSURE FLUID SUPPLY FROM SAID VARIABLE FLOW PUMP TO SAID FLUID MOTOR, AND UNIDIRECTIONAL FLUID FLOW-RESTRICTING MEANS INTERPOSED BETWEEN SAID SIGNAL RESPONSIVE ACTUATING EMANS AND SAID LOW PRESSURE ZONE FOR RESTRICTING FLUID FLOW FROM SAID SIGNAL RESPONSIVE ACTUATING MEANS TO SAID LOW PRESSURE ZONE, WHEREBY SAID FLOW CHANGING MEACHANISM WILL BE SLOW ACTING IN THE DIRECTION OF INCREASED PUMP FLOW.