Patent ID: 7743633

Claim:
A washing machine, comprising: a spin tub to hold laundry to be washed, the spin tub having an annular recess; and at least one ball balancer installed in the annular recess of the spin tub to compensate for a dynamic imbalance during rotation thereof, the ball balancer comprising: a first housing section having an open side, first and second walls facing each other and a third wall formed between the first and second walls, a second housing section to cover the open side of the first housing section, wherein the first and second housing sections are joined together to form an annular shaped race, and a plurality of balls movably disposed in the annular shaped race, wherein the first wall of the first housing section is more distant from the center of rotation of the ball balancer than the second wall thereof, wherein at least one support portion is integrally molded to the first housing section along at least the first wall thereof such that the at least one support portion establishes contact with a wall of the annular recess of the spin tub when the ball balancer is installed therein and serves to support the annular shaped race and the balls moving therein during rotation of the spin tub.