Dishwasher with Rack Corner Spray System

A dishwasher comprising:

• a tub defining a washing chamber adapted to receive and cleanse soiled kitchenware with recirculating washing fluid during a washing operation;
• a rack mounted in the tub for supporting kitchenware during the washing operation, said rack including a base, a front wall portion, a rear wall portion, side wall portions, and multiple corner portions including front corner portions at intersections of the front wall portion with the side wall portions and rear corner portions at intersections of the rear wall portion and the side wall portions, wherein the rack is movable relative to the tub between a retracted, operational position within the washing chamber to an extended, access position at least partially out of the washing chamber;
• and
• a spray arm mounted for concurrent movement with the rack between the extended and retracted positions and being configured to direct washing fluid during a washing operation upon kitchenware placed in the rack, said spray arm including:
• a main supply tube extending from the rear wall portion, substantially intermediate the side wall portions, toward the front wall portion;
• sub-arm sections leading from the main supply tube along the front wall portion toward the front corner portions and then extending rearward toward the rear corner portions;
• and
• corner nozzles provided at the front corner portions and configured to direct washing fluid upon kitchenware placed in the front corner portions of the rack during the washing operation.