Patent ID: 8714167

Claim:
A dishwasher, comprising: a rack positioned in a washing space and at least one washing space nozzle that directs washing fluid into the washing space; a sump that collects washing fluid to be supplied to the washing space; a filter to filter foreign materials, the filter comprising a first filter and a second filter rotatably mounted outside the first filter; a filter housing that receives the first and second filters therein; a motor positioned at one side of the filter housing; a shaft connected to the motor; a first gear coupled to the shaft so as to receive a driving force from the motor; and a second gear provided at an outer circumferential surface of the second filter to communicate with the first gear, wherein the second filter rotates in one of a clockwise or a counter-clockwise direction in response to operation of the motor to allow the first gear to rotate in the other of the clockwise or counter-clockwise direction.