Flow control valve device

Claim 1

A FLUID CONTROL VALVE, COMPRISING: (A) A HOUSING HAVING CHAMBER MEANS THEREIN; (B) A FIRST COMBINED FLUID PRESSURE AND DELIVERY PASSAGE COMMUNICATING WITH ONE END OF SAID CHAMBER MEANS; (C) A SECOND COMBINED FLUID PRESSURE PASSAGE AND DELIVERY PASSAGE COMMUNICATING WITH SAID CHAMBER MEANS AT AN OPENING INTERMEDIATE THE ENDS OF SAID CHAMBER MEANS, (D) A THIRD FLUID PASSAGE INTERCOMMUNICATING SAID SECOND COMBINED FLUID PRESSURE PASSAGE AND DELIVERY PASSAGE WITH THE OTHER END OF SAID CHAMBER MEANS; (E) A PISTON DISPOSED IN SAID CHAMBER MEANS FOR SLID ABLE MOVEMENT AXIALLY OF THE ENDS OF SAID CHAMBER MEANS, ONE END OF SAID PISTON BEING DISPOSED IN ONE END OF SAID CHAMBER MEANS, AND THE OTHER END OF SAID PISTON BEING DISPOSED IN THE OTHER END OF SAID CHAMBER MEANS, (F) MEANS BIASING SAID PISTON TO A NEUTRAL POSITION IN SAID CHAMBER MEANS; (G) SAID PISTON HAVING A FOURTH PASSAGE MEANS THEREIN COMMUNICATING SAID ONE END OF SAID CHAMBER MEANS WITH AN OPENING ON THE PERIPHERY OF SAID PISTON; (H) SAID PISTON BEING OPERABLE IN RESPONSE TO A PREDOMINANCE OF FLUID PRESSURE IN SAID FIRST PASSAGE OVER THAT IN SAID SECOND PASSAGE TO MOVE AXIALLY IN ONE DIRECTION IN OPPOSITION TO SAID BIASING MEANS TO UNCOVER SAID OPENING OF SAID SECOND PASSAGE WITH RESPECT TO SAID ONE END OF SAID CHAMBER MEANS TO AN EXTENT SUFFICIENT TO PASS FLUID FROM SAID ONE END OF SAID CHAMBER MEANS TO SAID SECOND AND THIRD PASSAGES AND SAID OTHER END OF SAID CHAMBER MEANS TO ACT WITH SAID BIASING MEANS OPEN THE OTHER END OF SAID PISTON WITH A FORCE BALANCING THE FORCE OF SAID FLUID PRESSURE IN SAID FIRST PASSAGE MEANS, (I) SAID PISTON BEING OPERABLE IN RESPONSE TO A PREPONDERANCE OF FLUID PRESSURE IN SAID OTHER END OF SAID CHAMBER MEANS AS PROVIDED THROUGH SAID SECOND PASSAGE AND SAID THIRD PASSAGE, OVER THAT IN SAID FIRST PASSAGE TO MOVE AXIALLY IN THE OPPOSITE DIRECTION IN OPPOSITION TO SAID BIASING MEANS TO UNCOVER SAID OPENING OF SAID SECOND PASSAGE WITH RESPECT TO SAID ONE END OF SAID FOURTH PASSAGE WITH RESPECT TO TENT SUFFICIENT TO PASS FLUID FROM SAID SECOND PASSAGE THROUGH SAID FOURTH PASSAGE TO SAID ONE END OF SAID CHAMBER MEANS AND SAID FIRST PASSAGE TO ACT WITH SAID BIASING MEANS UPON SAID ONE END OF SAID PISTON WITH A FORCE BALANCING THE FORCE OF SAID FLUID PRESSURE IN SAID OTHER END OF SAID CHAMBER MEANS.