Patent ID: 7621283

Claim:
A dishwasher comprising: a wash chamber; a water supply line in flow communication with said wash chamber, said water supply line having a first diameter; a valve configured to deliver water from said water supply line into said wash chamber; a turbine ratemeter in flow communication with said valve, said turbine ratemeter configured to meter water flow through said valve and generate a signal comprising a plurality of square wave pulses representing a quantity of water flow through said valve, each pulse of said plurality of square wave pulses representing a unit quantity of water; a restrictor tube in flow communication with said turbine ratemeter, said restrictor tube having a second diameter smaller than said first diameter; and a controller in signal communication with said turbine ratemeter, said controller configured to: open said valve; receive the generated signal from said turbine ratemeter; close said valve when a predetermined number of pulses have been received from said turbine ratemeter such that a predetermined quantity of water is supplied through said valve; and vary the quantity of water for a next use of the dishwasher based on at least one prior water usage.