Brake control system

Claim 1

A MOTOR VEHICLE COMPRISING IN COMBINATION AN ENGINE FOR DRIVING THE VEHICLE, A THROTTLE FOR CONTROLLING THE POWER OF THE ENGINE, A VEHICLE BRAKE FOR YIELDINGLY OPPOSING MOVEMENT OF THE VEHICLE, A PRESSURE CHAMBER FOR APPLYING THE BRAKE, A PUMP FOR FLUID PRESSURE DRIVEN IN RESPONSE TO MOVEMENT OF THE VEHICLE, WHICH PUMP MAINTAINS A PRESSURE WHICH IS A MEASURE OF VEHICLE SPEED UP TO A PREDETERMINED VEHICLE SPEED AND MAINTAINS A CONSTANT PRESSURE AT HIGHER SPEEDS, A SOURCE OF FLUID AT A SUBSTANTIALLY CONSTANT PRESSURE, A NORMALLY CLOSED PRESSURE REGULATING VALVE WHICH WHEN OPEN CONNECTS THE SOURCE OF PRESSURE TO THE BRAKE APPLYING CHAMBER, A SECOND PRESSURE CHAMBER FOR OPENING THE VALVE AT A PREDETERMINED MINIMUM PRESSURE AND REGULATING THE PRESSURE DELIVERED BY THE REGULATOR VALVE IN ACCORD WITH THE PRESSURE IN THE SECOND PRESSURE CHAMBER, A CONDUIT CONNECTING THE PUMP TO THE SECOND PRESSURE CHAMBER, A SECOND NORMALLY CLOSED VALVE WHICH WHEN CLOSED PREVENTS COMMUNICATION THROUGH SAID CONDUIT AND WHEN OPEN PERMITS COMMUNICATION THROUGH SAID CONDUIT AND MEANS RESPONSIVE TO CLOSING OF THE THROTTLE FOR OPENING THE SECOND VALVE TO DIRECT FLUID FROM THE PUMP TO THE SECOND PRESSURE CHAMBER TO OPEN THE FIRST VALVE AND APPLY THE BRAKE WITH A FORCE WHICH IS A MEASURE OF THE PRESSURE OF THE PUMP.