US Patent 7771543 Leakage preventing structure of dish washer

A leakage preventing structure of a dishwasher is provided. The structure includes a wash motor with a motor shaft disposed at its center, a sump housing that the motor shaft passes through, and a sealing portion that seals the space between the wash motor and the sump housing. The sealing portion is an aircap that controls the water level of washing water introduced into the aircap by means of air pressure of air inside the aircap, or a sealing member coupled to the motor shaft of the wash motor.