The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 17, 2013

Filed:

Aug. 08, 2011
Applicants:

Doo Young Ryu, Suwon-si, KR;

Ja Young Kim, Suwon-si, KR;

Ito Michiaki, Suwon-si, KR;

Myung Sun Kang, Suwon-si, KR;

Inventors:

Doo Young Ryu, Suwon-si, KR;

Ja Young Kim, Suwon-si, KR;

Ito Michiaki, Suwon-si, KR;

Myung Sun Kang, Suwon-si, KR;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D06F 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A drum type washing machine including a housing, a rotating spin tub to hold laundry to be washed and a ball balancer coupled to the spin tub to compensate for a dynamic imbalance during rotation thereof. The ball balancer includes a first plastic member and a second plastic member joined to each other to form a closed internal space in which a plurality of balls and viscous fluid are accommodated, the first plastic member includes a first side wall, a second side wall and a connecting wall to form a three-sided annular-shaped structure having an open side, and the second plastic member is adapted to cover the open side of the first plastic member. A diameter of each of the balls is smaller than a depth of the three-sided annular-shaped structure measured from the connecting wall to a top of the first side wall.


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