# US 9,038,424 B2 · Laundry machine

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- Number: US 9,038,424 B2
- Document ID: US9038424B2
- Status: Granted
- Kind: B2
- Application number: 13/142,662
- Filed: 2009-12-30
- Published: 2012-01-26
- Granted: 2015-05-26
- Earliest claimed: 2008-12-31
- Assignees: LG Electronics Inc.
- Applicants: Ig Geun Kwon; Hyun Seok Seo; Soo Bong Kim; Min Gyu Jo; Dong Il Lee; Suk Yun Moon; Sang Hun Kim; Hee Tae Lim; Jung Tae Song
- Inventors: Ig Geun Kwon; Hyun Seok Seo; Soo Bong Kim; Min Gyu Jo; Dong Il Lee; Suk Yun Moon; Sang Hun Kim; Hee Tae Lim; Jung Tae Song
- Web page: https://patentgrep.com/patent/US9038424B2

## CPC

- D06F 37/22: in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F 34/16: Imbalance
- D06F 37/263: {assembled from at least two elements connected to each other; Connecting or sealing means therefor}
- D06F 2103/26: Imbalance; Noise level
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES

## Abstract

A washing machine for washing laundry is provided. The washing machine includes a tub to hold washing water, a drum in the tub to hold laundry, a rotational shaft connected to a rear surface of the drum, a tub back, which forms a rear side of the tub and through which the rotational shaft passes, a bearing housing that supports the rotational shaft, and a suspension that buffers and supports the bearing housing. A vibration sensor senses vibration of a structure supported by the suspension, thereby enabling control of rotation of the drum based on the sensed vibration.

## Claims

### Claim 1

A laundry machine, comprising:
a tub that holds washing water;
a drum provided in the tub to hold laundry;
a rotational shaft connected to a rear surface of the drum;
a tub back which forms a rear side of the tub and through which the rotational shaft passes;
a bearing housing that supports the rotational shaft;
a suspension that buffers and supports the bearing housing; and
a vibration sensor that senses vibration of a structure supported by the suspension, wherein the tub back includes a rim portion formed at an outside circumferential surface thereof, and wherein a vibration sensor mounting portion is formed at an inside of the rim portion to which the vibration sensor is mounted.

### Claim 2 (depends on 1)

The laundry machine as claimed in claim 1, wherein the tub back is fastened to the rear side of the tub using a rear gasket.

### Claim 3 (depends on 1)

The laundry machine as claimed in claim 1, wherein the rim portion includes a water wall that protects from an upper side of the vibration sensor mounting portion.

### Claim 4 (depends on 1)

The laundry machine as claimed in claim 1, wherein the vibration sensor mounting portion includes:
a rib that supports an upper side of the vibration sensor; and
a supporting rib that supports an underside of the vibration sensor.

### Claim 5 (depends on 4)

The laundry machine as claimed in claim 4, wherein the supporting rib includes a holding step that prevents the vibration sensor from falling off the vibration sensor mounting portion.

### Claim 6 (depends on 4)

The laundry machine as claimed in claim 4, wherein the vibration sensor mounting includes a plurality of space securing ribs on an inside surface of the rib that secures a mounting space of the vibration sensor.

### Claim 7 (depends on 4)

The laundry machine as claimed in claim 4, wherein the vibration sensor mounting portion is disposed at an upper side of the tub back.

### Claim 8 (depends on 4)

The laundry machine as claimed in claim 4, wherein the rib has an inverted shape cross section that projects inward in a radial direction parallel to an inside of the rim portion.