# US 11,028,516 B2 · Washing machine

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- Number: US 11,028,516 B2
- Document ID: US11028516B2
- Status: Granted
- Kind: B2
- Application number: 15/737,742
- Filed: 2017-07-11
- Published: 2019-03-07
- Granted: 2021-06-08
- Earliest claimed: 2016-07-12
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd
- Inventors: Jung-hee Lee; Jeong-hoon Kang; Kwan-woo Hong; Min-sung Kim; Dae-uk Kang; Kyung-han Kim; Ju-bum Han
- Web page: https://patentgrep.com/patent/US11028516B2

## CPC

- D06F 37/06: Ribs, lifters, or rubbing means forming part of the receptacle
- D06F 23/06: and rotating or oscillating about an inclined axis
- D06F 37/04: adapted for rotation or oscillation about a horizontal or inclined axis
- D06F 23/02: and rotating or oscillating about a horizontal axis
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES

## Abstract

A washing machine including a washing tub capable of improving a washing effect and dehydration efficiency of the laundry is provided. The washing machine includes: a body; a washing tub configured to be rotatably provided in the body, accommodate a laundry therein, and have a cylindrical shape; a plurality of recessed portions configured to be formed in an inner circumferential surface of the washing tub and be arranged in the plural in a circumferential direction of the washing tub to form a pattern; and first dehydrating holes configured to be formed in the respective recessed portions, wherein the respective recessed portions are formed in a length direction of the washing tub.

## Claims

### Claim 1

A washing machine comprising:
a body configured to have an inlet formed in a front surface thereof;
a washing tub configured to be rotatably disposed in the body, accommodate a laundry injected through the inlet therein, and have a cylindrical shape; and
a plurality of protruding portions configured to protrude from an inner circumferential surface of the washing tub toward an inner portion of the washing tub to form a pattern,
wherein each protruding portion, of the plurality of protruding portions, includes a front end portion adjacent to the inlet, a central portion connected to the front end portion and a rear end portion connected to the central portion,
wherein the front end portion and the rear end portion transition to the central portion along curving arcs in a helix direction from a portion adjacent to the inlet in a direction that becomes distant from the inlet, and the front end portion and the rear end portion are formed in parallel with a shaft of the washing tub, and
wherein each protruding portion, of the plurality of protruding portions, includes a plurality of recessed portions formed in a length direction from the front end portion to the rear end portion of the protruding portion, and the plurality of recessed portions comprise an oval shape extended in the length direction from the front end portion to the rear end portion of the protruding portion.

### Claim 2 (depends on 1)

The washing machine as claimed in claim 1, wherein:
the washing tub is configured to rotate in a counterclockwise direction at a time of performing dehydration, and
the central portion of the protruding portions is curved in a right handed screw direction.

### Claim 3 (depends on 1)

The washing machine as claimed in claim 1, wherein the at least one protruding portion includes at least one first dehydrating hole formed in at least one of the recessed portions.

### Claim 4 (depends on 1)

The washing machine as claimed in claim 1, wherein the at least one protruding portion includes at least one second dehydrating hole formed between the plurality of recessed portions.

### Claim 5 (depends on 1)

The washing machine as claimed in claim 1, wherein the plurality of protruding portions are disposed in parallel with each other in a circumferential direction of the washing tub.

### Claim 6 (depends on 5)

The washing machine as claimed in claim 5, wherein the washing tub includes at least one third dehydrating hole formed between the plurality of protruding portions.