Power actuated master cylinder

Claim 1

A POWER OPERATED MASTER CYLINDER CONSTRUCTION COMPRISING: A MASTER CYLINDER HOUSING HAVING AN AXIALLY EXTENDING FLUID PRESSURIZING CHAMBER OPENING INTO AN OUTER END SURFACE OF SAID HOUSING, A LONGITUDINALLY EXTENDING PISTON POSITIONED IN SAID CHAMBER, SAID PISTON HAVING PERIPHERAL SURFACES ADJACENT ITS OPPOSITE ENDS WHICH SLIDINGLY ABUT THE SIDEWALLS OF SAID CHAMBER, SAID PISTON ALSO HAVING AN AXIALLY EXTENDING OPENING COMMUNICATING WITH THE OUTER END OF SAID PISTON AND THE SIDEWALLS OF SAID OPENING BEING CYLINDRICAL ADJACENT THE OUTER END OF SAID OPENING, A SERVOMOTOR HAVING A HOUSING WHICH IS AXIALLY ALIGNED AND FASTENED TO SAID OUTER END OF SAID MASTER CYLINDER HOUSING, A FORCE TRANSMITTING ROD HAVING AN INNER END IN ABUTMENT WITH THE INNER END OF SAID OPENING IN SAID PISTON AND A SPACED CYLINDRICAL PERIPHERAL SURFACE ENGAGING SAID CYLINDRICAL SURFACE OF SAID OPENING ADJACENT SAID OUTER END OF SAID OPENING, AND A FLEXIBLE MOVABLE WALL IN SAID SERVOMOTOR SUPPORTED RELATIVE TO SAID FLUID PRESSURE MOTOR HOUSING BY SAID FORCE TRANSMITTING ROD, WHEREBY SAID FLUID PRESSURE MOTOR CAN BE REMOVED FROM SAID MASTER CYLINDER HOUSING WITHOUT BREAKING THE SEAL OF SAID PISTON IN SAID FLUID PRESSURIZING CHAMBER.