# US 2021/0276152 A1 · Nozzle system, powder blasting device and method for using a nozzle system

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- Number: US 2021/0276152 A1
- Document ID: US20210276152A1
- Status: Published application
- Kind: A1
- Application number: 17/258,186
- Filed: 2019-08-07
- Published: 2021-09-09
- Earliest claimed: 2018-08-09
- Assignees: Ferton Holding S.A.
- Applicants: Ferton Holding S.A.
- Inventors: Florent BEANI; Marcel DONNET; Maxime FOURNIER; Karine SAUVAGEOT-MAXIT; Patrick PICHAT; Tiago BERTOLOTE
- Web page: https://patentgrep.com/patent/US20210276152A1

## CPC

- A61C 17/02: Rinsing or air-blowing devices, e.g. using fluid jets {or comprising liquid medication} (combined with receptacles for spittle A61C17/14; combined with power-driven cleaning or polishing devices A61C17/16)
- B24C 5/04: Nozzles therefor (nozzles in general B05B)
- A61C 3/025: Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
- A61C 17/0217: {having means for manually controlling the supply of two or more fluids, e.g. water and air}
- B24C 7/0046: {the abrasive material being fed in a gaseous carrier}
- B24C 7/0084: {the abrasive material being fed in a mixture of liquid and gas (B24C7/0038, B24C7/0076 take precedence; blasting medium with additives B24C11/005)}
- Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- B24C: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Nozzle system for a powder blasting device including a first nozzle element for transporting a powder-gas mixture stream along a transporting direction and a second nozzle element, where the second nozzle element surrounds the first nozzle element such that at least one channel is formed between the first nozzle element and the second nozzle element, where the channel is provided for transporting a liquid stream, where the first nozzle element and the second nozzle element are arranged such that in operation the powder-gas-mixture stream ejected by the first nozzle element is encased by the liquid stream ejected by the channel for forming an output stream of the nozzle system, where the first nozzle element has an acceleration part having a first cross section and a spreading part having a second cross section, where the spreading part is arranged downstream of the acceleration part.

## Claims

### Claim 1

Nozzle system for a powder blasting device comprising
a first nozzle element for transporting a powder-gas mixture stream along a transporting direction and
a second nozzle element, wherein the second nozzle element surrounds the first nozzle element such that at least one channel is formed between the first nozzle element and the second nozzle element, wherein the channel is provided for transporting a liquid stream, wherein the first nozzle element and the second nozzle element are arranged such that in operation the powder-gas-mixture stream ejected by the first nozzle element is encased by the liquid stream ejected by the channel for forming an output stream of the nozzle system,
wherein the first nozzle element has an acceleration part having a first cross section and a spreading part having a second cross section, wherein the spreading part is arranged downstream of the acceleration part, characterized in that the second cross section is larger than the first cross section.

### Claim 2 (depends on 1)

Nozzle system according to claim 1, wherein the acceleration part has a first cross section being constant in a direction extending along the transporting direction and/or the spreading part has a second cross section being at least partially constant in a direction extending along the transporting direction.

### Claim 3 (depends on 1)

Nozzle system according to claim 1, wherein the first cross section has a first width measured perpendicular to the transporting direction and a second cross section has a second width measured perpendicular to the transporting direction, wherein the second width is up to three times larger than the first width and/or wherein the first width has a width between 0.1 and 2.5 mm.

### Claim 4 (depends on 1)

Nozzle system according to claim 1, wherein the first nozzle element comprises a collecting part, wherein the collecting part is arranged upstream to the acceleration part, wherein the collecting part has a third cross section being preferably at least partially constant along the transporting direction.

### Claim 5 (depends on 4)

Nozzle system according to claim 4, wherein the third cross section is larger than the first cross section, wherein
a third width of the third cross section is up to three times larger than the first width, wherein the first width has a width between 0.1 and 2.5 mm.

### Claim 6 (depends on 1)

Nozzle system according to claim 1, wherein an inner curvature of the first nozzle element in a transition area or in the spreading part has a step-like and/or a cone-like shape.

### Claim 7 (depends on 1)

Nozzle system according to claim 1, wherein the acceleration part has a first length measured along the transporting direction and the spreading part has a second length measured along the transporting direction, wherein the second length is 0.5 to 3.5 times longer than the first length.

### Claim 8 (depends on 1)

Nozzle system according to claim 1, wherein the liquid stream is ejected from the channel via an output surface, wherein the channel is configured such that the liquid stream encasing the powder-gas mixture stream is formed by droplets.

### Claim 9 (depends on 8)

Nozzle system according to claim 8, wherein the output surface has a fourth cross section, wherein the fourth cross section has a size between 0.1 and 0.9 mm2.

### Claim 10

A nozzle system for a powder blasting device, comprising
a first nozzle element for transporting a powder-gas mixture stream along a transporting direction and
a second nozzle element, wherein the second nozzle element surrounds the first nozzle element such that at least one channel is formed between the first nozzle element and the second nozzle element, wherein the channel is provided for transporting a liquid stream, wherein the first nozzle element and the second nozzle element are arranged such that in operation the powder-gas-mixture stream ejected by the first nozzle element is encased by the liquid stream ejected by the channel via an output surface for forming an output stream of the nozzle system, wherein the output surface has a fourth cross section, wherein the fourth cross section has a size between 0.3 and 0.4 mm2.

### Claim 11 (depends on 8, 9, 10)

Nozzle system according to claims 8 to 10, wherein the fourth cross section is formed as a slit, an assembly of holes and/or assembly of grooves.

### Claim 12 (depends on 10)

Nozzle system according to claim 10, wherein an outer curvature of the first nozzle elements defines the shape of the fourth cross section, wherein the outer curvature of the first nozzle element comprises at least one recess being curved inwardly.

### Claim 13 (depends on 10)

Nozzle system according to claim 10, wherein in a direction parallel to the transporting direction the first nozzle element extends further than the second nozzle element or the first nozzle element and/or the second nozzle element ends at a common plane being perpendicular to the transporting direction.

### Claim 14 (depends on 1)

Powder blasting device comprising the nozzle system according to claim 1.

### Claim 15 (depends on 1)

Method for using a nozzle system according to claim 1 in a powder blasting device.

### Claim 16 (depends on 15)

Method according to claim 15, wherein the output stream has a fifth cross section that differs from a circularly formed cross section