# US 2014/0189973 A1 · Window cleaning device

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- Number: US 2014/0189973 A1
- Document ID: US20140189973A1
- Status: Published application
- Kind: A1
- Application number: 14/238,085
- Filed: 2012-07-23
- Published: 2014-07-10
- Earliest claimed: 2011-08-11
- Assignees: Intellectual Discovery Co., Ltd.
- Inventors: Man-Hyun Ryu
- Web page: https://patentgrep.com/patent/US20140189973A1

## CPC

- A47L 1/02: Power-driven machines or devices
- A47L 1/03: cleaning both sides of a window simultaneously
- A47L 1/12: for cleaning both sides simultaneously
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)

## Abstract

The present invention relates to a window cleaning device including a first cleaner and a second cleaner which are respectively attached on both sides of a window by magnetism. The device includes a first magnetic module included in the first cleaner; a second magnetic module included in the second cleaner; and a wheel part which is provided to at least one among the first and the second cleaner and moves the window cleaning device, wherein the wheel part includes a wheel having a plurality of holes at an external diameter part; a wheel cover made of an elastic material which surrounds the external diameter part of the wheel and generates frictional force by coming in contact with the window; and a wheel bearing which is connected to the wheel and delivers turning force, and a part of the wheel cover is inserted into the holes formed at the external diameter part of the wheel.

## Claims

### Claim 1

A window cleaning device including a first cleaner and a second cleaner which are respectively attached on both sides of a window by magnetism, the window cleaning device comprising:
a first magnetic module included in the first cleaner;
a second magnetic module included in the second cleaner; and
a wheel part which is provided to at least one among the first and the second cleaner and moves the window cleaning device,
wherein the wheel part includes:
a wheel having a plurality of holes at an external diameter part;
a wheel cover made of an elastic material which surrounds the external diameter part of the wheel and generates frictional force by coming in contact with the window; and
a wheel bearing which is connected to the wheel and delivers turning force, and a part of the wheel cover is inserted into the holes formed at the external diameter part of the wheel.

### Claim 2 (depends on 1)

The window cleaning device of claim 1, wherein the external diameter part comprises a plurality of supporting spokes for forming the holes between an outer face and an inner face.

### Claim 3 (depends on 2)

The window cleaning device of claim 2, wherein the wheel comprises two outer faces spaced apart from each other to form a groove therebetween.

### Claim 4 (depends on 2)

The window cleaning device of claim 2, wherein the external diameter part of the wheel has the inner face extending out of the outer face.

### Claim 5 (depends on 2)

The window cleaning device of claim 2, wherein a portion of the wheel bearing is inserted into the inner face of the external diameter part, such that the wheel bearing makes contact with the inner face.

### Claim 6 (depends on 1)

The window cleaning device of claim 1, wherein the first cleaner, which is attached on an inner side of the window, comprises at least two wheel parts.

### Claim 7 (depends on 6)

The window cleaning device of claim 6, wherein the first cleaner comprises a driver for rotating the wheel part, and
the second cleaner attached on an outer side of the window moves through magnetic force along the first cleaner.

### Claim 8 (depends on 1)

The window cleaning device of claim 1, wherein the wheel cover comprises silicone.

### Claim 9 (depends on 1)

The window cleaning device of claim 1, wherein the wheel comprises aluminum.

### Claim 10 (depends on 1)

The window cleaning device of claim 1, wherein the wheel is formed through two structures by a double injection molding.

### Claim 11 (depends on 1)

The window cleaning device of claim 1, wherein the wheel bearing comprises polyoxymethilene (POM) resin.