Power braking system

Claim 1

A POWER BRAKING APPARATUS ADAPTED FOR SUPPLYING PRESSURIZED FLUID TO THE WHEEL BRAKE ACTUATORS OF A VEHICLE, COMPRISING AN OPERATOR''S BRAKE APPLYING MEMBER AND AN ELONGATED UNITARY CONTROL VALVE AND FLUID PRESSURE TRANSFER DEVICE ADAPTED TO BE ANCHORED AT ONE END TO A VEHICLE AND AT THE OTHER END OPERATIVELY CONNECTED TO THE SAID BRAKE APPLYING MEMBER, THE SAID DEVICE HAVING A CONTROL VALVE PORTION COMPRISING AN OUTER BODY MEMBER AND AN INNER SPOOL MEMBER AND A FLUID PRESSURE TRANSFER PORTION COMPRISING A CYLINDER PORTION CONNECTED TO THE SAID VALVE BODY PORTION AND A PISTON MOVABLE RECTILINEARLY IN THE SAID CYLINDER PORTION, THE SAID CYLINDER PORTION HAVING CLOSURE MEMBERS AT EITHER END THEREOF FORMING RESPECTIVELY WITH THE SAID PISTON A PAIR OF INTERNAL CHAMBERS, A PISTON ROD CARRYING THE SAID PISTON AND HAVING A PROJECTING END THEREON, ONE OF SAID CLOSURE MEMBERS HAVING A BORE THEREIN FORMING AN AUXILIARY CHAMBER COMMUNICATING NORMALLY WITH ONE OF THE SAID FIST-MENTIONED PAIR OF CHAMBERS, FLUID CONNECTIONS TO THE SAID VALVE FROM A SOURCE OF PRESSURIZED FLUID, MEANS FOR MAINTAINING THE SAID ONE CHAMBER AND THE SAID AUXILIARY CHAMBER FULL OF FLUID DURING NON-BRAKE-APPLYING CONDITIONS, CONDUIT MEANS FOR TRANSMITTING PRESSURIZED FLUID FROM THE SAID VALVE TO THE OTHER OF THE SAID PAIR OF CHAMBERS UPON ACTUATION OF THE BRAKE APPLYING MEMBER THEREBY SIMULTANEOUSLY MOVING THE SAID PISTON IN THE SAID CYLINDER AND THE SAID PISTON ROD TOWARD THE SAID AUXILIARY CHAMBER, ADDITIONAL CONDUIT MEANS ADAPTABLE FOR CONNECTING THE SAID AUXILIARY CHAMBER TO THE WHEEL BRAKE ACTUATORS, THE SAID MOVEMENT OF THE PISTON DISCHARGING FLUID FROM THE SAID ONE CHAMBER THROUGH THE SAID AUXILIARY CHAMBER AND THE SAID ADDITIONAL CONDUIT MEANS TO THE WHEEL BRAKE ACTUATORS, THE SAID DEVICE BEING SO ARRANGED THAT A PREDETERMINED MOVEMENT OF THE BRAKE APPLYING MEMBER CAUSES THE SAID PISTON ROD TO TRAP FLUID IN THE SAID AUXILIARY CHAMBER AND THEN FURTHER MOVEMENT OF THE SAID BRAKE APPLYING MEMBER CAUSED THE SAID PISTON ROD TO MOVE FURTHER INTO THE SAID AUXILIARY CHAMBER AND TRANSMIT PRESSURIZED FLUID FROM THE SAID AUXILIARY CHAMBER THROUGH THE SAID ADDITIONAL CONDUIT MEANS TO THE WHEEL BRAKE ACTUATORS.