Hydraulic brake systems

Claim 1

HYDRAULIC BRAKE APPARATUS FOR VEHICLES HAVING WHEEL BRAKES AND A DRIVING SHAFT CONNECTED TO THE WHEELS COMPRISING FLUID PRESSURE RESPONSIVE BRAKE OPERATING MEMBERS FOR THE WHEELS, A STORAGE RESERVOIR FOR BRAKE FLUID UNDER PRESSURE, A PUMP HAVING A DRIVING PORTION ACTUATED BY SAID SHAFT, A CONTROL VALVE HAVING A HOUSING, A FIRST FLUID CONNECTION BETWEEN SAID RESERVOIR AND SAID CONTROL VALVE HOUSING, A SECOND FLUID CONNECTION FOR THE PASSAGE OF FLUID THERETHROUGH IN EITHER DIRECTION BETWEEN SAID CONTROL VALVE HOUSING AND SAID BRAKE OPERATING MEMBERS, A SUPPLY FLUID CONNECTION FROM SAID CONTROL VALVE HOUSING TO SAID PUMP HAVING A NON-RETURN VALVE THEREIN, A DELIVERY FLUID CONNECTION FROM SAID PUMP TO SAID CONTROL VALVE HOUSING HAVING A NON-RETURN VALVE THEREIN, AND A VALVE MEMBER IN SAID HOUSING AND FORMING PART OF SAID CONTROL VALVE PORTIONS ESTABLISHING COMMUNICATION AT ONE POSITION BETWEEN SAID SECOND FLUID CONNECTION AND SAID SUPPLY FLUID CONNECTION AND ESTABLISHING COMMUNICATION BETWEEN SAID DELIVERY FLUID CONNECTION AND SAID FIRST CONNECTION FOR THE RETURN OF FLUID TO SAID RESERVOIR THROUGH SAID FIRST FLUID CONNECTION, AND AT ANOTHER POSITION ESTABLISHING COMMUNICATION BETWEEN SAID FIRST FLUID CONNECTION AND SAID SUPPLY FLUID CONNECTION AND BETWEEN SAID DELIVERY FLUID CONNECTION AND SAID SECOND FLUID CONNECTION FOR BRAKE APPLICATION.