Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Reexamination Certificate
2005-12-06
2005-12-06
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
C137S505150, C137S505250, C137S508000
Reexamination Certificate
active
06971402
ABSTRACT:
In order to achieve an object to provide a liquid control valve of normally close valve type which has both of an outflow side pressure automatic regulating function and a water stop function, the liquid control valve has a pressure regulating piston which moves within a housing for finding a balance point between an outflow side pressure and a spring force of a pressure regulating spring placed so as to resist the outflow side pressure; a movable valve seat which is provided in the pressure regulating piston and moves together with the pressure regulating piston; and a valve body which sits on the valve seat so as to close the valve in accordance with a valve closing force generated by an inflow side pressure and a spring force of a water stop spring, and moves apart from the valve seat so as to open the valve at the time when an external valve opening force larger than the valve closing force is applied, whereby the outflow side pressure automatic regulating function is achieved in accordance with movement of the pressure regulating piston, and the water stop function is achieved in accordance with the valve close.
REFERENCES:
patent: 1949106 (1934-02-01), Manneschmidt, Jr.
patent: 2842146 (1958-07-01), Schuster
patent: 3183040 (1965-05-01), Gold
patent: 3437109 (1969-04-01), Egerer et al.
patent: 4516600 (1985-05-01), Sturman et al.
patent: 4231998 (1994-03-01), None
patent: 2696018 (1994-03-01), None
patent: 195137-1994 (1994-07-01), None
patent: 8-7456 (1996-03-01), None
Hepperle Stephen M.
INAX Corporation
Jacobson & Holman PLLC
NOK Corporation
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