Flush valve bypass and filter

Details Flush valve bypass and filter Flush valve bypass and filter

1997-09-18

1999-03-30

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

137550, 138 40, 210429, 210431, 251 38, 251 45, 251118, 251120, F16K 717, F16K 31385

Patent

active

058878483

ABSTRACT:
A diaphragm type of flush valve for use with toilet devices such as urinals and water closets includes a body with an inlet and an outlet and there is a valve seat therebetween and a valve member movable to a closing position on the valve seat. The valve member includes a diaphragm which is peripherally attached to the body. There is a pressure chamber above the diaphragm for holding the valve member on its valve seat and there is a filter and a bypass orifice connecting the inlet and the pressure chamber. The filter includes a filter ring positioned beneath the diaphragm and adjacent the outer periphery thereof. The filter ring and the diaphragm are held in a fixed position relative to each other. The filter ring has a plurality of outwardly directed circumferentially spaced filter grooves. There is a seal ring between the filter ring and the body and facing the grooves. A peripheral chamber is bounded by the seal ring, the filter ring and the body, with water reaching the peripheral chamber by passing through the filter ring grooves. There is an orifice connecting the peripheral chamber and the pressure chamber.

REFERENCES:
patent: 3144874 (1964-08-01), Goldtrap
patent: 3895645 (1975-07-01), Johnson
patent: 3904168 (1975-09-01), Marocco
patent: 4180096 (1979-12-01), Johnson
patent: 4987920 (1991-01-01), Donner
patent: 5332192 (1994-07-01), Whiteside
patent: 5335694 (1994-08-01), Whiteside

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