Patent Document ID: 20080172804
Application ID: 11624562
Patent Flag: 0

Claim One:
1. An automatic washing machine comprising: a wash tub and nested wash basket; a wash liquid supply flow path arranged to selectively flow wash liquid into said tub; a pressure sensor configured to measure a liquid pressure in the wash tub; a motor operably connected to rotate the wash basket in the wash tub; and control circuitry, wherein the control circuitry is configured to control the washing machine to perform the steps of: (a) adding wash liquid into the wash tub through the wash liquid supply flow path; (b) rotating the wash basket with the motor following step (a); (c) detecting a first liquid pressure within the wash tub using the pressure sensor during the rotation of the wash basket; (d) determining whether there is a sufficient amount of wash liquid in the wash tub for any laundry load present in the wash basket, based at least in part on the detected first liquid pressure; and (e) adding more wash liquid to the wash tub if it is determined in step (d) that there is an insufficient amount of wash liquid in the wash tub.