Patent ID: 8789395

Claim:
A washing machine, comprising: a tub; and a rotating tub rotatably arranged in the tub, the rotating tub comprising a cylindrical portion; a front plate arranged at a front end of the cylindrical portion, the front plate having an opening for the entrance or exit of laundry; a rear plate arranged at a rear end of the cylindrical portion; a first mass member fixedly and directly mounted to at least one of an annular portion of the front plate and a rear surface of the rear plate so as not to be moved relative to the rotating tub in a circumferential direction of the rotating tub, the first mass member being fixedly mounted in only an arcuate portion of the at least one of the front plate and the rear plate whereby the first mass member applies load imbalance to the rotating tub upon rotation of the rotating tub; a balancer housing having an annular channel directly mounted to at least one of the front plate and the rear plate; and only a single second mass member received in the annular channel and arranged to be movable in the circumferential direction of the rotating tub, the second mass member serving to compensate for load imbalance of the rotating tub upon rotation of the rotating tub.