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Outside filter for flush valve

  • US 5,967,182 A
  • Filed: 11/04/1997
  • Issued: 10/19/1999
  • Est. Priority Date: 11/04/1997
  • Status: Expired due to Term
First Claim
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1. A diaphragm-type 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 stop flow between said inlet and 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 filter and bypass orifice connecting said inlet and pressure chamber, said filter including a circumferential filter ring attached to said diaphragm and positioned adjacent the periphery of said diaphragm at the peripheral attachment of diaphragm to said body, said ring having a plurality of circumferentially spaced filter grooves in communication with said inlet, a peripheral channel connecting said grooves, and an orifice in communication with said peripheral channel and said plurality of grooves.

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