Valve for the charging of pressure accumulators

Claim 1

IN A VALVE FOR THE CHARGING OF A PRESSURE ACCUMULATOR WITH A FLUID FROM A SUPPLY SYSTEM HAVING A HIGHPRESSURE AND A LOW-PRESURE SIDE, IN COMBINATION, A VALVE BODY FORMED WITH AN INLET CONNECTABLE TO SAID HIGH-PRESSURE SIDE, A CHAMBER CONNECTABLE WITH SAID ACCUMULATOR, AN OUTLET CONNECTABLE TO SAID LOW-PRESSURE SIDE, AND A PASSAGE IN SAID BODY INTERCONNECTING SAID INLET AND SAID OUTLET; AN ACTUATING MEMBER ADAPTED TO BE OPERATED BY FLUID PRESSURE FROM THE ACCUMULATOR EXTENDING WITHIN SAID BODY INTO SAID CHAMBER FOR DISPLACEMENT WITHIN SAID BODY FROM A NORMAL TERMINAL POSITION TOWARD AN OFFNORMAL POSITION; A CLOSURE MEMBER DISPLACEABLE IN SAID BODY RELATIVELY TO SAID ACTUATING MEMBER BETWEEN A FIRST POSITION BLOCKING SAID PASSAGE AND A SECOND POSITION WHEREIN SAID PASSAGE IS UNBLOCKED, SAID CLOSURE MEMBER HAVING THE SHAPE OF A DIFFERENT PISTON WITH A SMALLER AND A LARGER END FACE EXPOSED IN ITS FIRST POSITION TO OPPOSITELY DIRECTED FORCES DUE TO FLUID PRESSURE WITHIN SAID PASSAGE TENDING TO MAINTAIN SAID CLOSURE MEMBER IN SAID FIRST POSITION; RESTORING MEANS ENGAGING SAID ACTUATING MEMBER FOR RESISTING DISPLACEMENT THEREOF FROM SAID NORMAL POSITION INTO SAID OFF-NORMAL POSITION, SAID ACTUATING SAID CLOSURE MEMBERS BEING PROVIDED WITH CO-OPERATING FIRST AND SECOND FORMATIONS ENGAGEABLE WITH EACH OTHER UPON DISPLACEMENT OF SAID ACTUATING MEMBER FROM AND INTO SAID NORMAL POSITION WHEREBY SAID CLOSURE MEMBER IS ENTRAINED FROM SAID FIRST TO SAID SECOND POSITION AND VICE VERSA, RESPECTIVELY; INDEXING MEANS YIELDABLY ENGAGING SAID ACTUATING MEMBER IN SAID NORMAL POSITION; AND MEANS FORMING A BYPASS FOR SAID PASSAGE NORMALLY OBSTRUCTED BY SAID INDEXING MEANS, SAID INDEXING MEANS BEING MOVABLE INTO A NONOBSTRUCTING POSITION BY THE DISPLACEMENT OF SAID ACTUATING MEMBER FROM SAID NORMAL POSITION, THEREBY RELIEVING THE FLUID PRESSURE WITHIN SAID PASSAGE.