Fluid operated booster valve

Claim 1

IN A FLUID OPERATED BOOSTER VALVE FOR USE WITH TWO APPARATUSES AT LEAST ONE OF WHICH IS FLUID OPERATED, THE COMBINATION OF: (A) A HOUSING PROVIDING A CYLINDER HAVING INPUT AND OUTPUT ENDS AND HAVING THEREIN AN INLET PORT CONNECTIBLE TO A SOURCE OF OPERATING FLUID, AN OUTLET PORT CONNECTIBLE TO SAID ONE APPARATUS TO DELIVER OPERATING FLUID THERETO, AND A RESERVOIR PORT CONNECTIBLE TO A RESERVOIR; (B) RELATIVELY AXIALLY MOVABLE, INPUT AND OUTPUT PLUNGERS AXIALLY MOVABLE IN SAID CYLINDER, SAID OUTPUT PLUNGER HAVING AN ACTUATING SURFACE WHICH FACES AXIALLY OF SAID CYLINDER; (C) TENSIONABLE INPUT MEANS ADJACENT SAID INPUT END OF SAID CYLINDER AND CONNECTED TO SAID INPUT PLUNGER FOR PULLING SAID INPUT PLUNGER AXIALLY OF SAID CYLINDER RELATIVE TO SAID OUTPUT PLUNGER; (D) TENSIONABLE OUTPUT MEANS ADJACENT SAID OUTPUT END OF SAID CYLINDER AND CONNECTED TO SAID OUTPUT PLUNGER, SAID OUTPUT MEANS BEING CONNECTIBLE TO THE OTHER OF SAID APPARATUSES AND BEING MOVABLE WITH SAID OUTPUT PLUNGER TO ACTUATE SAID OTHER APPARATUS WHEN FLUID PRESSURE FROM SAID INLET PORT IS APPLIED TO SAID ACTUATING SURFACE; (E) MEANS FOR BIASING SAID INPUT AND OUTPUT PLUNGERS AXIALLY OF SAID CYLINDER IN OPPOSITION TO THE ACTION OF FLUID PRESSURE FROM SAID INLET PORT ON SAID ACTUATING SURFACE; (F) MEANS INCLUDING FIRST VALVE MEANS EMBODIED IN SAID INPUT AND OUTPUT PLUNGERS AND RESPONSIVE TO RELATIVE AXIAL MOVEMENT THEREOF FOR SELECTIVELY CONNECTING SAID ACTUATING SURFACE IN FLUID COMMUNICATION WITH SAID RESERVOIR PORT AND WITH SAID INLET PORT; AND (G) MEANS INCLUDING SECOND VALVE MEANS EMBODIED IN SAID INPUT AND OUTPUT PLUNGERS AND RESPONSIVE TO RELATIVE AXIAL MOVEMENT THEREOF FOR CONNECTING SAID INLET PORT AND SAID OUTLET PORT IN FLUID COMMUNICATION AND FOR CONTROLLING THE RESTRICTION TO FLOW OF OPERATING FLUID FROM SAID INLET PORT TO SAID OUTLET PORT.