US 12,220,788 B2
Nozzle system, powder blasting device and method for using a nozzle system
Florent Beani, Gex (FR); Marcel Donnet, Saint Jean de Gonville (FR); Maxime Fournier, Lausanne (CH); Karine Sauvageot-Maxit, Corbonod (FR); Patrick Pichat, Annemasse (FR); and Tiago Bertolote, Le Grand-Saconnex (CH)
Assigned to FERTON HOLDING S.A., Delémont (CH)
Appl. No. 17/258,186
Filed by FERTON HOLDING S.A., Delémont (CH)
PCT Filed Aug. 7, 2019, PCT No. PCT/EP2019/071217
§ 371(c)(1), (2) Date Jan. 6, 2021,
PCT Pub. No. WO2020/030691, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 18188331 (EP), filed on Aug. 9, 2018.
Prior Publication US 2021/0276152 A1, Sep. 9, 2021
Int. Cl. B24C 5/04 (2006.01); A61C 3/025 (2006.01); A61C 17/02 (2006.01); B24C 7/00 (2006.01)
CPC B24C 5/04 (2013.01) [A61C 3/025 (2013.01); A61C 17/0217 (2013.01); B24C 7/0046 (2013.01); B24C 7/0084 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Nozzle system for a powder blasting device, namely a powder jet device for dental treatments, 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 at least one 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 at least one channel for forming an output stream of the nozzle system, wherein the first nozzle element and the second nozzle element terminate at a front end of the nozzle system or, wherein the first nozzle element protrudes at the front end 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 and that the liquid stream is ejected from an output surface such that the powder jet device is encased by droplets.