Motor vehicle brake precharge system

Claim 1

A PRECHARGER FOR A HYDRAULIC BRAKING SYSTEM FOR A MOTOR VEHICLE HAVING WHEEL BRAKE CYLINDERS FOR APPLYING WHEEL BRAKES, COMPRISING, A MASTER CYLINDER HAVING A FLUID CHAMBER CONNECTED TO SAID WHEEL CYLINDERS AND CONTAINING A PISTON MOVABLE THEREIN TO TRAMSMIT FLUID UNDER PRESSURE TO SAID BRAKE CYLINDERS, A FLUID RESERVOIR, FLUID PORT MEANS CONNECTING SAID RESERVOIR AND SAID MASTER CYLINDER, FIRST MEANS FOR MOVING SAID PISTON, FLUID OPERATED MOTOR MEANS OPERABLE ON THE FLUID IN SAID RESERVOIR TO DISPLACE THE SAME THROUGH SAID PORT MEANS INTO SAID CHAMBER AND WHEEL CYLINDERS TO PRESSURIZE THE SAME TO A PREDETERMINED LEVEL PREPARATORY TO APPLICATION OF SAID WHEEL BRAKE, A SOURCE OF FLUID UNDER PRESURE, CONDUIT MEANS CONNECTING SAID SOURCE TO SAID MOTOR MEANS FOR OPERATING SAID MOTOR MEANS, AND SECOND MEANS IN SAID CONDUIT MEANS OPERABLY CONNECTED TO AND RESPONSIVE TO INITIAL MOVEMENT OF SAID FIRST MEANS FOR CONTROLLING THE FLOW OF FLUID TO SAID MOTOR MEANS TO PRESSURIZE THE FLUID IN SAID RESERVOIR, SUBSEQUENT MOVEMENT OF SAID FIRST MEANS MOVING SAID PISTON TO POSITION INCREASING THE PRESSURE OF THE FLUID TO SAID BRAKE CYLINDERS TO APPLY SAID VEHICLE BRAKES, SAID PISTON HAVING MEANS PREVENTING RETURN FLOW OF FLUID THROUGH SAID PORT MEANS FROM SAID CHAMBER UPON MOVEMENT OF SAID PISTON IN A PRESSURE INCREASING DIRECTION, A BRAKE LEVER PIVOTALLY CONNECTED NEAR ITS MIDPOINT TO SAID FIRST MEANS AND HAVING A PEDAL PORTION ADJACENT ONE END, AND PRIMARY AND SECONDARY LEVER PIVOT MEANS BETWEEN THE OPPOSITE END OF SAID LEVER AND THE POINT OF PIVOTAL CONNECTION TO SAID FIRST MEANS, SAID PRIMARY AND SECONDARY LEVER PIVOT MEANS BEING SO CONSTRUCTED AND ARRANGED THAT SAID LEVER PIVOTS ABOUT SAID PRIMARY PIVOT MEANS AS LONG AS SAID PRESSURIZING MEANS IS OPERATIVE AND SAID LEVER PIVOTS FIRST ABOUT SAID PRIMARY PIVOT MEANS AND SUBSEQUENTLY ABOUT SAID SECONDARY PIVOT MEANS UPON FAILURE OF SAID PRESSURIZING MEANS, TO INCREASE THE MECHANICAL ADVANTAGE THEREOF.