Minimum travel hand-or foot-operated power brake actuator

Claim 1

A BRAKE ACTUATING MECHANISM FOR A POWER BOOST BRAKE ASSEMBLY HAVING A MASTER CYLINDER PISTON MOVABLE BY AN OPERATING ROD OPERABLY CONNECTED THERETO, A FLUID PRESSURE DIFFERENTIALLY OPERATED SERVO MECHANISM OPERABLY CONNECTED TO AND BETWEEN SAID PISTON AND ROD HAVING CONTROL MEANS RENDERED OPERABLE UPON INITIAL MOVEMENT OF SAID ROD IN ONE DIRECTION TO MOVE SAID PISTON INDEPENDENTLY OF SAID ROD, COMPRISING, A MECHANICAL LINKAGE INCLUDING A FIRST LEVER ARCUATELY MOVABLE ABOUT A FIXED PIVOT AT ONE END AND ABUTTING SAID ROD, A MANUALLY MOVABLE SECOND LEVER HAVING A FIXED PIVOTAL CONNECTION TO SAID FIRST LEVER AND A LOST MOTION CONNECTION TO SAID ROD, SAID LOST MOTION CONNECTION PERMITTING A LIMITED ARCUATE RELATIVE MOVEMENT BETWEEN END PORTIONS OF SAID LEVERS, SUBSTANTIALLY LINER MOVABLE FORCE MEANS FOR MOVING SAID MANUALLY MOVABLE LEVER, AND MEANS OPERATIVELY CONNECTING SAID SECOND LEVER TO SAID CONTROL MEANS FOR MOVEMENT OF SAID LEVERS AND ROD BY SAID CONTROL MEANS SUBSEQUENT TO MOVEMENT OF SAID ROD AND FIRST LEVER RELATIVE TO SAID SECOND LEVER SUFFICIENT TO RENDER INOPERABLE SAID LOST MOTION CONNECTION.