Bypass orifice and filter for diaphragm type flush valve
AssigneeSloan Valve Company
InventorJohn R. Wilson
Life of this patent
Estimating the term…
Abstract
A diaphragm type of flush valve includes a body with an inlet and an outlet. There is a filter chamber in the diaphragm upstream of the bypass orifice, which chamber extends downwardly below the diaphragm. Water within the filter chamber is quiescent and substantially less turbulent than water beneath the diaphragm. There are filter openings into the filter chamber which have a cross sectional area greater than that of the bypass orifice, but shaped to prevent the passage of particles of a size which will not pass through the bypass orifice. The diaphragm has a downwardly extending rim with spaced flow control windows therein. The rim has an inner wall and a plurality of inwardly extending ribs on the wall for dampening closing movement of the diaphragm on the valve seat.
Claims25
A diaphragm-type flush valve including a body having an inlet and an outlet, a valve seat between said inlet and outlet and a valve member movable to a closing position on said valve seat to control water flow between said inlet and outlet, said valve member including a flexible diaphragm peripherally attached to said body, a pressure chamber above said diaphragm with water therein holding said valve member on said valve seat,
- a bypass opening in said flexible diaphragm connecting said inlet with said pressure chamber to provide water therefor to move said diaphragm to said closing position, a shroud attached to said diaphragm upstream of said bypass opening and extending downwardly below said diaphragm, the shroud defining a filter chamber in fluid communication with the bypass opening, legs which extend beyond the shroud to define filter openings, said filter openings having a combined cross sectional area greater than that of said bypass opening, and the filter openings being shaped to prevent the passage of particles of a size which will not pass through the bypass opening.
A valve member assembly for use in a toilet device flush valve having a valve body and an inlet and an outlet, said flush valve having a seat to close communication between said inlet and outlet, and said valve member assembly being formed and adapted to close upon said seat, said valve member assembly including a flexible diaphragm, a bypass opening in said flexible diaphragm, a shroud attached to said diaphragm upstream of said bypass opening and extending downwardly below said diaphragm, the shroud defining a filter chamber in fluid communication with the bypass opening, legs which extend beyond the shroud to define filter openings said filter openings having a combined cross sectional area greater than that of said bypass opening and the filter openings being shaped to prevent the passage of particles of a size which will not pass through said bypass opening.
A diaphragm-type of flush valve including a body having an inlet and an outlet, a valve seat between said inlet and outlet, and a valve member movable to a closing position on said valve seat to control water flow between said inlet and outlet, said valve member including a diaphragm peripherally attached to said body, a pressure chamber above said diaphragm with water therein holding said valve member on said valve seat, a filter and bypass orifice connecting said inlet with said pressure chamber to provide water thereto to move said diaphragm to said closing position, the diaphragm defining an axis,
- annular rim extending axially downwardly and facing said valve seat, the rim including a plurality of spaced flow control windows in said rim which permit generally radially-directed flow therethrough.
A valve member assembly for use in a toilet device flush valve having a valve body and an inlet and an outlet therefor, said flush valve having a seat to close communication between said inlet and outlet, and said valve member assembly being formed and adapted to close upon said seat, said valve member assembly including a diaphragm defines an axis, a filter and bypass orifice formed in said valve member assembly for use in connecting the flush valve inlet, and a flush valve pressure chamber above the valve member assembly to cause movement thereof to a valve closing position,
- said diaphragm having an annular rim extending axially downwardly and facing said valve seat, a plurality of spaced flow control windows in said rim which permit generally radially-directed flow therethrough, said rim having an inner wall, and a plurality of inwardly extending ribs on said wall for dampening closing movement of said diaphragm on said valve seat.
Dependencies are inferred from the claim text.