# US 11,432,692 B2 · Dust suction device utilizing beads

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- Number: US 11,432,692 B2
- Document ID: US11432692B2
- Status: Granted
- Kind: B2
- Application number: 16/603,879
- Filed: 2018-04-10
- Published: 2020-03-12
- Granted: 2022-09-06
- Earliest claimed: 2017-04-13
- Assignees: Testonic Co., Ltd.
- Applicants: Testonic Co., Ltd.
- Inventors: Won Chul Shin
- Web page: https://patentgrep.com/patent/US11432692B2

## CPC

- A47L 9/0072: {Mechanical means for controlling the suction or for effecting pulsating action}
- A47L 23/22: Devices or implements resting on the floor for removing mud, dirt, or dust from footwear (built-in gratings, e.g. foot-scrapers, E04F19/10)
- A47L 23/02: Shoe-cleaning machines, with or without applicators for shoe polish
- A47L 23/263: {with moving or driven parts, also combined with suction cleaning}
- A47L 23/266: {Mats}
- B08B 5/04: Cleaning by suction, with or without auxiliary action
- F24F 7/10: with air supply, or exhaust, through perforated wall, floor or ceiling (outlet members for directing or distributing air {into rooms or spaces, e.g. ceiling air-diffusers} F24F13/06)
- F24F 11/0001: {for ventilation (F24F11/30 takes precedence)}
- Y02A 50/2351: Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
- 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)
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A dust suction device includes: a main body composed of a bottom plate and a footboard, wherein a dust suction part is formed in the bottom plate, and the footboard seals the dust suction part and has suction holes formed on the upper part thereof to allow the dust to be sucked to the dust suction part; a number of springs provided on the bottom inside the bottom plate matching the number of suction holes; balls which are provided on the upper part of the springs and which are in close contact with the suction holes of the footboard and open and close the suction holes; and a suction part which is connected to a side portion of the main body through a hose and sucks the dust through the suction holes toward the dust suction part when the suction holes are open.

## Claims

### Claim 1

A dust suction device comprising:
a main body comprising a bottom plate having a dust suction portion formed therein to suck dust and a footboard disposed on top of the bottom plate to close the dust suction portion and having suction holes formed on top thereof to allow the dust to be sucked to the dust suction portion;
springs disposed on an inner bottom surface of the bottom plate and having the same number as the suction holes;
balls disposed on tops of the springs in such a manner as to come into contact with the suction holes of the footboard to open and close the suction holes; and
a suction part connected to the side of the main body by means of a hose to allow the dust to be sucked to the dust suction portion through the suction holes at the time when the suction holes are open,
wherein the bottom plate has a plurality of partition walls spaced apart from each other on an inner bottom surface thereof to form a zigzag flow path in the dust suction portion.

### Claim 2 (depends on 1)

The dust suction device according to claim 1, wherein the bottom plate has air purifying parts disposed on outer sides thereof to purify outside air by means of an operation of the suction part.

### Claim 3 (depends on 1)

The dust suction device according to claim 1, wherein the balls have larger diameters than the suction holes.

### Claim 4 (depends on 1)

The dust suction device according to claim 1, wherein the balls are made of stainless steel.

### Claim 5 (depends on 1)

The dust suction device according to claim 1, wherein the balls are made of carbon steel or chrome steel.

### Claim 6 (depends on 5)

The dust suction device according to claim 5, wherein the outer peripheries of the balls are coated with nickel.

### Claim 7 (depends on 1)

The dust suction device according to claim 1, wherein the bottom plate has fitting members disposed on the bottom surface thereof to allow the springs to be stably supported thereagainst, without any escape.