Patent ID: 8438670

Claim:
A gravity flush, direct fed jet toilet system having at least two flush volumes, comprising a toilet bowl having an outlet and a tank, wherein the tank comprises at least one fill valve and at least one flush valve, the system provides a surface area of water in the toilet bowl of at least about 200 cm 2 and a peak flow rate measured at an outlet of the bowl during a siphon of at least about 2500 ml/s and a flow rate of at least 2000 ml/s is achieved in no greater than about 1.75 seconds from initiation of a flush cycle, wherein internal cross-sectional area measurements within the toilet system are defined by the following relationships: A pm >35 cm 2 >A jip >A jop >6.4 cm 2 (III) A pm >35 cm 2 >A rip >A jop >6.4 cm 2 >A rop (IV) wherein A pm is a cross-sectional area of a primary manifold, A jip is a cross-sectional area of a jet inlet port, A jop is a cross-sectional area of a jet outlet port, A rip is a cross-sectional area of a rim inlet port, and A rop is a total cross-sectional area of an at least one rim outlet port, and the toilet bowl is capable of refilling at the end of a flush cycle having a reduced water volume, to achieve a seal depth that is greater than about 5 cm and a post-flush surface area of water in the bowl that is at least about 90% of an area obtained after completion of a full flush cycle.