Patent ID: 8438883
Filing Date: 2013-05-14
Classification: D06F

Abstract:
1. A washing machine, comprising: a body; a water tub installed in the body; a drive motor installed at a rear part of the water tub to drive a rotary shaft; and a washing tub rotatably installed in the water tub, the washing tub including a cylindrical circumference having a plurality of lifter installation areas for lifters to be installed thereon, a front part disposed at a front of the cylindrical circumference and having an inlet for insertion of a laundry, and a rear part disposed at a rear of the cylindrical circumference and coupled to the rotary shaft, wherein the cylindrical circumference of the washing tub includes a pattern part formed between the plurality of lifter installation areas in a circumferential direction of the cylindrical circumference, and a plurality of spin-drying holes formed through the pattern part, the pattern part includes a plurality of depressions being depressed outward from an inner surface of the washing tub in a shape of a pyramid, the depressions each having a square base, and the depressions are arranged in a form of a matrix along the circumferential direction and a forward/backward direction of the cylindrical circumference, and the square bases of the depressions are connected to each other with respect to the circumferential direction and the forward/backward direction of the cylindrical circumference without having an offset.