Patent ID: 7441420

Claim:
A washing machine comprising: a drum rotatably fitted to a tub for storing washing water; a main body enclosing an outer shell of the tub; a motor operatively connected to the drum; a fastening bolt including a head, a male threaded portion and a non-threaded portion, an outer diameter of the non-threaded portion being greater than a smallest diameter of the male threaded portion; a bolt holder including first and second protrusions on an outer surface; an elastic bushing surrounding the outer surface of the bolt holder, the bushing being fixed between a washer and the main body, and fixed between the washer and the first protrusion; and fixed between the first protrusion and second protrusion; a fastening boss extending unitarily from a rear surface of the tub and having a female threaded portion that receives the male threaded portion of the bolt; and having a female non-threaded portion that receives the non-threaded portion of the fastening bolt; wherein the fastening bolt passes through the washer, the bushing, the bolt holder and the main body to fix the tub relative to the main body.