Hydrostatic ballcock assembly

In a ballcock assembly which includes an upright standpipe for delivering flush water, wherein said standpipe has an upper discharge end;

• a diaphragm valve member at said upper end of said standpipe, said valve member being movable between a closed position engaged with said standpipe upper end and a fully open position spaced above said standpipe upper end so as not to restrict the flow of water therefrom, vent valve means operatively associated with said diaphragm valve member and float means operatively associated with said standpipe for movement up and down between predetermined upper and lower positions in response to falling and rising water levels adjacent said standpipe, and means operatively associated with and extending between said vent valve means and said float means providing for movement of said diaphragm valve member to the full open position in response to movement of said float means to said lower position and for movement of said diaphragm valve member to said closed position in response to movement of said float member to said upper position, said vent valve means including a housing with a vent opening, a valve member in said housing and a valve stem extending outwardly through said vent opening into a space adjacent said housing, actuator means movably mounted on said housing for actuating said vent valve means to provide for movement of said diaphragm valve member between said open and closed positions, said actuator means including an adjustably mounted actuator member engageable with said stem at various points along the length thereof to vary the magnitude of the valve opening force applied to said stem when said vent valve means is moved to an open position, and means operatively connecting said actuator means and said float means to provide for movement of said actuator means in response to up and down movement of said float means.

For use in a ballcock assembly, a valve assembly comprising a disc shape diaphragm valve member having an underside and a top side and an axial opening, a valve housing holding the circumferential outer edge of said valve member in a fixed position in which a central portion of the valve member can flex upwardly in response to an upwardly directed force on the underside thereof exceeding any downwardly directed force on the topside thereof and can flex downwardly in response to a downwardly directed force on the topside exceeding any upwardly directed force on the underside, said valve housing including top wall structure cooperating with said diaphragm member to form a water chamber between said diaphragm member and said top wall member, means forming a water discharge opening for said chamber in said top wall member, and a vent valve member in said chamber operable to close said discharge opening, said vent valve member including a stem extending substantially horizontally through said discharge opening and a seat disposed in said chamber and including an annular seal surrounding said stem and engageable with said top wall structure at a position surrounding said discharge opening so as to close said vent valve, a water deflector member of generally inverted cup shape hingedly mounted on said top wall at a position such that a portion of the deflector wall is above said discharge opening, and a downwardly extending actuator member adjustably mounted on said deflector wall and engageable with said stem in response to hinged movement of said deflector member so as to apply an adjustable force to tip the vent valve member so as to open said discharge opening.