Patent 7980260 was granted and assigned to Whirlpool Corporation on July, 2011 by the United States Patent and Trademark Office.
An automatic dishwasher having a tub defining a wash chamber for receiving utensils to be washed and including a rotatable spray arm located within the wash chamber and a liquid recirculation system for selectively supplying liquid to the rotatable spray arm and where the rotatable spray arm is driven with a power unit.