Booster brake mechanism

Claim 1

A BOOSTER MOTOR MECHANISM COMPRISING A FLUID PRESSURE MOTOR HAVING A PRESSURE RESPONSIVE UNIT, A MEMBER TO BE OPERATED ARRANGED COAXIAL WITH SAID PRESSURE RESPONSIVE UNIT, A VALVE MECHANISM CONNECTED BETWEEN SAID MOTOR AND SOURCES OF DIFFERENT PRESSURES AND NORMALLY CONNECTING SAID MOTOR TO ONE OF SAID SOURCES TO BALANCE PRESSURES ON OPPOSITE SIDES OF SAID PRESSURE RESPONSIVE UNIT, SAID VALVE MECHANISM BEING MOVABLE TO DISCONNECT SAID ONE SOURCE FROM SAID MOTOR AND CONNECT THE OTHER SOURCE THERETO TO OPERATE SAID PRESSURE RESPONSIDE UNIT, SAID VALVE MECHANISM COMPRISING A PLURALITY OF ELEMENTS ONE OF WHICH IS MANUALLY OPERABLE, AN ELASTIC BODY FORMED AS AN ANNULUS ENGAGING AND WHOLLY CARRIED AND RADIALLY CONFINED BY SAID MEMBER TO BE OPERATED AND WITH RESPECT TO WHICH BODY BOTH SAID MANUALLY OPERABLE ELEMENT AND SAID PRESSURE RESPONSIVE UNIT ARE RELATIVELY MOVABLE FROM NORMAL OFF POSITIONS, AND ANNULAR REACTION MEMBERS ENGAGING RESPECTIVELY WITH SAID MANUALLY OPERABLE ELEMENT AND WITH SAID PRESSURE RESPONSIVE UNIT AND HAVING CONCENTRIC SURFACES OF SMALLER TOTAL AREA THAN AND ENGAGING A SURFACE OF SAID ELASTIC BODY, SAID SURFACE OF SAID ELASTIC BODY HAVING FREE AREA PORTIONS TO PROVIDE FOR THE DEFORMATION OF SAID ELASTIC BODY UNDER PRESSURE, WHEREBY, UPON OPERATION OF SAID VALVE MECHANISM AND ENERGIZATION OF SAID MOTOR, SAID ELASTIC BODY WILL BE DEFORMED AND BOTH OF SAID CONCENTRIC SURFACES WILL DELIVER FORCES TO SAID ELASTIC BODY AND THROUGH SUCH BODY TO SAID MEMBER TO BE OPERATED.