Drum type washing machine

Patent metadata

Field	Value
Publication number	US-9284676-B2
Application number	US-46161909-A
Country	US
Kind code	B2
Filing date	Aug 18, 2009
Priority date	Sep 9, 2008
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Disclosed herein is a drum type washing machine including a body, a tub arranged in the body, and a drum rotatably installed in the tub, and an inner surface of a rear wall of the has a flat portion along a rotating direction of the drum.

First claim

What is claimed is:

1. A drum type washing machine comprising:
a body;
a tub arranged in the body;
a drum rotatably installed in the tub; and
a bearing housing insert-molded into a rear wall of the tub,
wherein an inner surface of the rear wall of the tub has a first portion that has no convex nor concave shape in a rotating direction of the drum where the bearing housing is insert-molded, and a second portion formed as an outer rim with reinforcing portions outside of the first portion where the bearing housing is insert-molded,
wherein an outer surface of the rear wall of the tub includes a plurality of concentric circular ribs having a common center as a center of the tub, and a plurality of linear ribs radially extending from the center of the tub, and
the bearing housing includes rib-shaped reinforcing members formed in a shape corresponding to the plurality of concentric circular ribs and the plurality of linear ribs,
wherein the reinforcing portions have a curved shape and protrude forward from the second portion of the inner surface of the rear wall of the tub in a circumferential direction of the tub to directly face the drum with no intervening structure, so as to reduce resistance on a flow of air between a rear wall of the drum and the rear wall of the tub during rotation of the drum.

2. The drum type washing machine according to claim 1 , wherein:
the tub has a cylindrical shape, and
the plurality of concentric circular ribs are reinforcing ribs.

3. The drum type washing machine according to claim 2 , wherein the rib-shaped reinforcing members are formed on a rear surface of the bearing housing.

4. The drum type washing machine according to claim 1 , further comprising a shaft connected to the drum through a center of the rear wall of the tub and serving to rotate the drum.

5. The drum type washing machine according to claim 1 , wherein the bearing housing defines a plurality of holes.

6. The drum type washing machine according to claim 1 , wherein a front surface of the bearing housing has a smooth surface having no convex or concave portions.

7. A drum type washing machine comprising:
a tub having a rear wall;
a drum rotatably arranged in the tub; and
a bearing housing contained in the rear wall of the tub,
wherein an inner surface of the rear wall of the tub includes a first region corresponding to the bearing housing, and a second region around the first region formed with reinforcing protrusions, and the first region is a region that has no convex nor concave shape in a rotating direction of the drum where the bearing housing is insert-molded, and
wherein an outer surface of the rear wall of the tub includes a reinforcing portion formed in the second region,
wherein the reinforcing portion protrudes from the inner surface of the rear wall of the tub and include a plurality of concentric circular ribs having a common center as a center of the tub, and a plurality of linear ribs radially extending from the center of the tub, and the bearing housing includes rib-shaped reinforcing members formed in a shape corresponding to the plurality of concentric circular ribs and the plurality of linear ribs,
wherein the reinforcing protrusions have a curved shape and protrude forward from the inner surface of the rear wall of the tub in a circumferential direction of the tub to directly face the drum with no intervening structure, so as to reduce resistance on a flow of air between a rear wall of the drum and the rear wall of the tub during rotation of the drum.

8. The drum type washing machine according to claim 7 , wherein:
the tub has a cylindrical shape, and the reinforcing portion extends in a circumferential direction of the rear wall of the tub.

Assignees

• Choi Ji Hoon
• Chang Phil Soo
• Kwak Bong Wha
• Kang Jeong Hoon
• Wee Hoon
• Park Tae Jin
• Cho Sung Jin
• Kim Sang Wook
• Na Gyu Sung
• Samsung Electronics Co Ltd

Inventors

• Choi Ji Hoon
• Chang Phil Soo
• Kwak Bong Wha
• Kang Jeong Hoon
• Wee Hoon
• Park Tae Jin
• Cho Sung Jin
• Kim Sang Wook
• Na Gyu Sung

Classifications

• D06F37/26 Primary

  Casings; Tubs · CPC title

• D06F37/20

  Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations · CPC title

• D06F37/264 Primary

  Tubs provided with reinforcing structures, e.g. ribs, inserts, braces · CPC title

• D06F37/269

  for the bearing of the rotary receptacle · CPC title

• D06F37/22

  in machines with a receptacle rotating or oscillating about a horizontal axis · CPC title