Abstract: A spray assembly for a dishwasher of the kind wherein utensils are disposed inside a dishwashing chamber and a generally L-shaped spray assembly is rotated to and fro so that a horizontal leg thereof sweeps across a lower surface of the dishwashing chamber and a vertical leg of the spray assembly sweeps across a side wall of the dishwashing chamber. The spray assembly has channels for conveying detergent and hot water and further has multiple nozzles disposed along the horizontal and vertical legs for directing detergent and hot water on to the utensils inside the dishwashing chamber from multiple different directions as the spray assembly rotates. A fluid inlet coupler at an end of the spray assembly is adapted for coupling to a rotatable hub having duct connectors projecting downwardly substantially parallel to an axis of rotation of the hub and fluidly coupled to respective channels of the spray assembly.

Abstract: A dishwashing method is dislosed wherein two detergent compositions, one being alkalinic and the other acidic are applied in sequence onto the dishes. The liquid compositions are applied onto the dishes directly without or with only a moderate dilution such that once applied onto the dishes they input respective alkalinic and acid pH's on the surface of the dishes.

Abstract: A dishwashing machine is provided for washing dishes with a very rapid washing cycle in which water and detergent are sprayed through different spraying nozzles in different operational stages within the dishwashing cycle.