Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Reexamination Certificate
2006-10-24
2006-10-24
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
C137S270000
Reexamination Certificate
active
07124997
ABSTRACT:
A toilet room flush valve includes a body with an inlet and an outlet and a valve seat therebetween. A valve assembly in the body is positioned to close upon the seat to control flow from the inlet to the outlet. A cover is mounted upon the body and defines a pressure chamber with the valve assembly. A bypass connects the inlet and the pressure chamber whereby pressure in the chamber maintains the valve assembly upon the seat. The pressure chamber may be vented to permit movement of the valve assembly toward the cover. The stroke of the valve assembly is limited by a volume regulator which is fixed to the cover and an adjustable microcontroller which is movable with the valve assembly and positioned to contact the volume regulator upon venting of the pressure chamber and consequent movement of the valve assembly.
REFERENCES:
patent: 784408 (1905-03-01), Krichbaum
patent: 3367621 (1968-02-01), Griswold
patent: 3397863 (1968-08-01), Bell
patent: 4624444 (1986-11-01), Johnson
patent: 4671485 (1987-06-01), Saarem
patent: 5244179 (1993-09-01), Wilson
patent: 6382586 (2002-05-01), Wilson et al.
patent: 6460825 (2002-10-01), Nortier et al.
Oliver Steven R.
Wilson John R.
Cook Alex McFarron Manzo Cummings & Mehler, Ltd.
Jacyna J. Casimer
Sloan Valve Company
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