Flush controller

US 6,499,152 B2
Flush controller
Dwight N. Johnson, Carlsbad, Calif. (US)
Assigned to Geberit Technik AG, Jona (Switzerland)
Filed on 18-Jan-2001, as Appl. No. Geberit Technik AG, Jona (Switzerland)
Int. Cl.7E03D 13/00

US 6,499,152 B2 Flush controller Dwight N. Johnson, Carlsbad, Calif. (US) Assigned to Geberit Technik AG, Jona (Switzerland) Filed on Jan. 18, 2001, as Appl. No. 9/766,471. Prior Publication US 2002/0092090 A1, Jul. 18, 2002 Int. Cl.7E03D 13/00 U.S. Cl. 48212;302 32 Claims 1. A flush controller for siphon flushing and resealing the trap of a sanitary fixture comprising: a housing having an inlet for connection to a water supply and an outlet for connection to the sanitary fixture; a control system including a microprocessor mounted within said housing; a high flow path between said inlet and said outlet, and a high flow valve in said high flow path; a first electrical valve operator for opening and closing said high flow valve; a low flow path between said inlet and said outlet, and a low flow valve in said low flow path; a second electrical valve operator for opening and closing said low flow valve; said low and high flow paths having flow restrictions with a proportional relationship; a flow sensor in said low flow path for measuring flow in said low flow path and providing an output signal; means for providing an initiation signal to said control system; said control system including means for operating said first and second valve operators for opening said high flow and low flow valves in response to said initiation signal in order to provide a siphon flush flow through said output port; said control system including means for determining the volume of said siphon flush flow using said proportional relationship and said output signal, and for operating said first valve operator to close said high flow valve after a first predetermined siphon flow volume to provide a continuing trap reseal flow; and said control system including means for using said output signal to determine the volume of said trap reseal flow and for operating said second valve operator to close said low flow valve after a second predetermined trap reseal flow volume.