Washing machine with ball balancer

Details Washing machine with ball balancer Washing machine with ball balancer

1997-05-28

1998-09-15

Coe, Philip R.

Textiles: fluid treating apparatus

Machines

Combined

74573F, D06F 3724

Patent

active

058063498

ABSTRACT:
A washing machine having a ball balancer is provided. The washing machine comprises: an external cabinet; an outer tub suspended inside the external cabinet; a rotary tub rotatably installed inside the outer tub for containing the laundry therein; and a ball balancer installed at a circumference of the rotary tub for balancing a rotation of the rotary tub. The ball balancer comprises: a casing installed at the circumference of the rotary tub and having at least one annual chamber formed therein; a multiplicity of balancing balls contained in the annual chamber of the casing; and a viscous fluid contained in the chamber of the casing. Here, the annual chamber of the casing is formed at the bottom of the annual chamber with at least one groove for receiving the balancing balls over a predetermind circumferencial length, and the groove has an inclined radial outer wall for guiding a upward movement of the balancing balls, as a rotational speed of the rotary tub increases. Accordingly, when the rotary tub rotates at a low speed, the increase of vibrations of the rotary tub is prevented.

REFERENCES:
patent: 4433592 (1984-02-01), Tatsumi et al.
patent: 5605078 (1997-02-01), Taylor et al.

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