Flush valve refill head for controlling flow during operating cycle
Patent 5649686 Issued on July 22, 1997. Estimated Expiration Date: 
September 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1830005 2122189 2210860 2369104 2433507 3656499 Flush valve refill ring Flush valve refill ring Flush valve filter and bypass orifice Flush valve flow control refill ring Patent #: 5335694 InventorApplicationNo. 708778 filed on 09/06/1996US Classes:251/40, Tilting pilot valve138/40, Restrictors251/120Movable or resilient guide or restrictorExaminersPrimary: Walton, George L.Attorney, Agent or FirmInternational ClassesF16K 031/145F16K 031/385 AbstractA flush valve for use on toilet devices such as urinals and water closets has a body with an inlet and an outlet and a connecting passage. There is a valve seat at one end of the passage and a diaphragm is positioned to control the flow of water through the passage and close upon the valve seat. A guide member is attached to the underside of the diaphragm and positioned within the passage. There is a refill ring attached to the guide member. The refill ring has an upstream end which is peripherally spaced from the passage when the diaphragm is closed on the valve seat. The refill ring has a downstream water flow control portion having a plurality of first water flow paths which, when the diaphragm is away from the valve seat, provide the major water flowway between the inlet and the outlet. The refill ring water flow control portion has a plurality of second water flow paths, parallel with the first water flow paths, which are formed to provide a smaller volume of flow than said first water flow paths.Field of SearchPilot valve seated in motor or valve elementTilting pilot valve Diaphragm or bellows surface Diaphragm or bellows motor element Movable or resilient guide or restrictor Adjustable guide or restrictor Valve at point of greatest restriction Restrictors With screen Tortuous path Variable restriction | |
