Patent ID: 9399861
Filing Date: 2016-07-26
CPC Classification: E03D,F16K,Y10T

Claim Text:
1. A diaphragm flush valve for use with toilet devices, the diaphragm flush valve comprising: a body having an inlet and an outlet, a valve seat between said inlet and said outlet, and a valve member movable to a closing position on said valve seat to stop flow between said inlet and said outlet, said valve member including, a diaphragm peripherally attached to said body, a pressure chamber above said diaphragm for holding said valve member on said valve seat, a disk positioned on top of said diaphragm, a guide member extending downwardly from said diaphragm, said disk being attached to said guide member connecting said diaphragm, said disk, and said guide member forming said valve member, said disk including a rigid body and a seal member, said seal member having a portion on an upper surface of said disk for sealing contact with a relief valve extending through said disk and said guide member, said disk having a portion on a lower surface thereof for contact with said diaphragm, said disk having a plurality of inwardly directed protrusions, wherein said rigid body is made of a composite material; wherein said disk comprises a sealing surface of rubber overmolded over the portion on the upper surface of said disk; and wherein said portion on the upper surface of said disk has a recessed area in the rigid body over which the sealing surface of rubber is overmolded.