Fluid pressure brake control valve device

Claim 1

IN A FLUID BRAKE EQUIPMENT HAVING A BRAKE PIPE NORMALLY CHARGED WITH PRESSURIZED FLUID, RESERVOIR MEANS NORMALLY CHARGED WITH PRESSURIZED FLUID, A BRAKE CYLINDER, AND A BRAKE CONTROLLING VALVE DEVICE RESPONSIVE TO A REDUCTION IN PRESSURE IN THE BRAKE PIPE TO SUPPLY PRESSURIZED FLUID FROM SAID RESERVOIR MEANS TO SAID BRAKE CYLINDER TO EFFECT AN APPLICATION OF THE BRAKES AND RE SPONSIVE TO AN INCREASE IN BRAKE PIPE PRESSURE TO RELEASE THE PRESSURIZED FLUID FROM SAID BRAKE CYLINDER, IN COMBINATION: (A) BRAKE RELEASING VALVE MEANS OPERATIVE BETWEEN A FIRST AND SECOND POSITION, (B) MEANS BIASING SAID BRAKE RELEASING VALVE MEANS INTO SAID FIRST POSITION, (C) MEANS FOR MOVING SAID BRAKE RELEASING VALVE MEANS INTO SAID SECOND POSITION, (D) SAID INTO BRAKE RELEASING VALVE MEANS OPERATIVE IN SAID SECOND POSITION TO CONNECT SAID BRAKE CYLINDER TO ATMOSPHERE, (E) A PISTON VALVE HAVING OPPOSING CHAMBERS TO A FIRST POSITION, (F) SAID PISTON VALVE HAVING OPPOSING CHAMBERS WHEREIN ONE OF SAID CHAMBER HOUSES SAID SPRING MEANS, (G) SAID ONE CHAMBER BEING OPERATIVELY CONNECTED TO SAID BRAKE CYLINDER, (H) THE OTHER OF SAID CHAMBERS BEING DIRECTLY CONNECTED TO SAID BRAKE PIPE, (I) SAID PISTON VALVE BEING MOVABLE TO A SECOND POSITION UPON PRESSURIZATION OF SAID OTHER CHAMBER AND VENTING OF SAID ONE CHAMBER, AND (J) SAID BRAKE RELEASING VALVE MEANS IN SAID SECOND POSITION COOPERATIVE WITH SAID PISTON VALVE IN SAID SECOND POSITION FOR COMMUNICATING SAID RESERVOIR MEANS TO SAID BRAKE PIPE FOR EQUALIZATION OF PRESSURES THEREBETWEEN.