Spraying nozzle assembly for a dishwasher

A spraying nozzle assembly for a dishwasher, the spraying nozzle assembly comprising:

• an adapter fixedly connected to a washing liquid outlet of a pump which is disposed below a washing chamber of the dishwasher, for circulating washing liquid supplied into the washing chamber;
• a rotary spray arm which is rotatably coupled to an upper portion of the adapter and is disposed at a lower portion of the washing chamber, the rotary spray arm being coaxially disposed with the adapter, the rotary spray arm having a washing liquid receiving chamber therein into which the washing liquid is introduced from the pump through the adapter;
• a first means for spraying the washing liquid introduced into the rotary spray arm toward utensils placed in the washing chamber, the first means including a plurality of spraying ports which are formed on an upper surface of the rotary spray arm in accordance with a longitudinal axis thereof, the spraying ports having at least one first spraying port which is disposed at a left side about a transverse axis of the rotary spray arm, and at least one second spraying port which is disposed at a right side about the transverse axis of the rotary spray arm, the second spraying port extending by a predetermined length toward an inner portion of the rotary spray arm, the first means including at least one spraying nozzle which is movably installed in the second spraying port;
• and
• a second means for varying a direction of the washing liquid being sprayed toward the utensils, the second means including a spring assembly which is compressed or expanded as the rotary spray arm is being rotated, thereby moving the spraying nozzle in a forward direction or a backward direction, and a third means for compressing and expanding the spring assembly in accordance with a rotation of the rotary spray arm, the spring assembly being disposed in the washing liquid receiving chamber of the rotary spray arm and being coupled to the spraying nozzle.