Adjustable solenoid operated valve

Claim 1

A FLUID FLOW CONTROL VALVE COMPRISING: HOUSING MEANS ENCLOSING A CYLINDRICAL CHAMBER BOUNDED BY AN ENDWALL AND LATERAL WALLS; MEANS DEFINING A FLUID OUTLET PASSAGE THROUGH SAID ENDWALL TERMINATING IN AN OUTLET PORT IN THE INNER SURFACE OF SAID ENDWALL AT A POINT CENTRALLY-LOCATED WITH RESPECT TO SAID LATERAL WALLS; MEANS DEFINING ON SAID INNER SURFACE OF THE ENDWALL A PAIR OF RADIALLY-SPACED, CO-PLANAR VALVE SEATS CONCENTRICALLY SURROUNDING SAID OUTLET PORT AND A PLURALITY OF INLET PASSAGES THROUGH SAID ENDWALL TERMINATING AT SAID INNER SURFACE THEREOF AT SPACED POINTS LOCATED BETWEEN THE VALVE SEATS; A DISCOID VALVE MEMBER OF SLIGHTLY SMALLER DIAMETER THAN SAID CHAMBER FREELY MOVABLY DISPOSED IN SAID CHAMBER ADJACENT, AND SUBSTANTIALLY PARALLEL TO THE PLANE OF, SAID ENDWALL, SAID VALVE MEMBER CONTAINING A CENTRAL PILOT PORT, OF SMALLER AREA THAN SAID OUTLET PORT, AND AN ECCENTRIC PRESSURE-BALANCE PORT, OF SMALLER AREA THAN SAID PILOT PORT, RADIALLY-SPACED FROM THE CENTER OF THE VALVE MEMBER BY AN AMOUNT INTERMEDIATE THE RADIAL DISTANCE BETWEEN SAID COPLANAR VALVE SEATS; A DISCOID CONTROL MEMBER, OF SUBSTANTIALLY THE SAME DIAMETER AS THE VALVE MEMBER, FREELY MOVABLY DISPOSED IN SAID CHAMBER WITH ONE FACE IN CONFRONTING RELATION TO THAT FACE OF THE VALVE MEMBER REMOTE FROM SAID ENDWALL AND HAVING A VALVE BALL MEMBER, PROJECTING CONCENTRICALLY FROM SAID ONE FACE, ADAPTED TO SEAT IN THE PILOT PORT IN SAID VALVE MEMBER, SAID CONTROL MEMBER FURTHER CONTAINING A PLURALITY OF AXIAL PORTS RADIALLY SPACED FROM THE CENTER THEREOF; MEANS RESILIENTLY URGING SAID CONTROL MEMBER TOWARD SAID ENDWALL WHEREBY SAID VALVE BALL MEMBER SEATS IN SAID PILOT PORT AND URGES SAID VALVE MEMBER INTO ENGAGEMENT WITH SAID CO-PLANAR VALVE SEATS; AND ELECTROMAGNETIC MEANS SELECTIVELY OPERABLE TO MOVE SAID CONTROL MEMBER IN A DIRECTION AWAY FROM SAID ENDWALL AGAINST THE EFFECT OF SAID URGING MEANS.