Solenoid actuated valve with manual over-ride

Claim 1

A VALVE DEVICE COMPRISING: (A) A VALVE BODY HAVING A BORE THEREIN, (B) SAID BORE HAVING A PLURALITY OF COUNTERBORES PROGRESSIVELY INCREASING IN SIZE AND CONTIGUOUS WITH SAID BORE, (C) A VALVE SEAT IN THE LARGEST OF SAID PLURALITY OF COUNTERBORES AND DISPOSED TRANSVERSELY THEREOF BETWEEN A FLUID PRESSURE SUPPLY PASSAGE COMMUNICATING WITH SAID LARGEST COUNTERBORE ON ONE SIDE OF SAID SEAT, AND A DELIVERY PASSAGE COMMUNICATING WITH SAID LARGEST COUNTERBORE ON THE OTHER SIDE OF SAID SEAT, (D) A VALVE MEMBER HAVING ONE END SLIDABLY RECEIVED IN SAID BORE, AN INTERMEDIATE PORTION LARGER IN DIAMETER THAN SAID ONE END PORTION AND SLIDABLY RECEIVED IN THE SMALLEST ONE OF SAID COUNTERBORE, AND AN UPPER END PORTION DISPOSED IN SAID LARGEST COUNTERBORE AND HAVING A LARGER DIAMETER THAN SAID INTERMEDIATE PORTION AND A SMALLER DIAMETER THAN SAID LARGEST COUNTERBOR, SAID UPPER END PORTION SEATABLE ON SAID SEAT ON SAID ONE SIDE THEREOF, (E) MEANS BIASING SAID VALVE MEMBER INTO ENGAGEMENT WITH SAID VALVE SEAT, (F) HOLLOW EXHAUST STEM MEANS EXTENDING INTO SAID LARGEST COUNTERBORE AND MOVABLE IN A FIRST DIRECTION AXIALLY THEREOF TO FIRSTLY, SEAT UPON SAID VALVE MEMBER, TO SECONDLY, SEPARATE SAID VALVE MEMBER FROM SAID SEAT IN OPPOSITION TO SAID BIASING MEANS UPON FURTHER AXIAL MOVEMENT THEREOF AND MOVABLE IN THE OPPOSITE DIRECTION THEREAFTER TO EFFECT RESEATING OF SAID VALVE MEMBER BY SAID BIASING MEANS AND THEREAFTER DISENGAGE THEREFROM, AND (G) FIRST SHOULDER MEANS ON SAID VALVE MEMBER FORMED BY THE INTERSECTION BETWEEN SAID ONE END PORTION THEREOF AND SAID INTERMEDIATE PORTION THEREOF, AND SECOND SHOULDER MEANS ON SAID VALVE MEMBER FORMED BY THE INTERSECTION OF SAID INTERMEDIATE PORTION THEREOF WITH SAID UPPER END PORTION THEREOF, (H) PASSAGE MEANS INTERCONNECTING SAID DELIVERY PASSAGE WITH SAID SMALLEST COUNTERBORE TO PROVIDE DELIVERY PRESSURE THEREIN ACTING UPON SAID FIRST SHOULDER MEANS, (I) SAID SECOND SHOULDER MEANS HAVING A PREDETERMINED AREA WHEREBY THE FORCE OF SUPPLY PRESSURE THEREON PROVIDES A PREDETERMINED SEATING FORCE UPON SAID VALVE MEMBER, AND (J) SAID FIRST SHOULDER MEANS HAVING A PREDETERMINED AREA WHEREBY SEPARATION OF SAID HOLLOW STEM FROM SAID VALVE MEMBER AFTER SAID VALVE IS RESEATED PROVIDES AN UPWARD FORCE ON SAID VALVE MEMBER AS A RESULT OF DELIVERY PRESSURE THEREON TO OFFSET THE FORCE OF EXHAUST FROM SAID DELIVERY PASSAGE UPON SAID VALVE MEMBER TENDING TO SEPARATE SAID VALVE MEMBER FROM SAID HOLLOW STEM.