Flush valve diaphragm orifice insert and rib design

Details Flush valve diaphragm orifice insert and rib design Flush valve diaphragm orifice insert and rib design

2005-12-06

2005-12-06

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Reciprocating valve

Diaphragm

C251S040000, C251S061100

Reexamination Certificate

active

06971634

ABSTRACT:
A diaphragm assembly for use in conventional diaphragm-type flush valves includes a flexible diaphragm body having a first side and a second side and a bypass orifice filter insert defined in the diaphragm body. The second side of the diaphragm body includes an annular protrusion and a plurality of protruding ribs, wherein a recess area is defined between the rib and the protrusion. When a pressure difference is applied across the diaphragm body, the second side of the diaphragm body is concave and the first side of the diaphragm body is convex, whereby a distance between the rib and the protrusion decreases in order to prevent the diaphragm body from closing two quickly against a valve seat of a flush valve. A method for controlling pressure differences across the diaphragm body is also disclosed.

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