Device for rotating a fluid inside a spray nozzle, assembly comprising such a device and coating device

Patent metadata

Field	Value
Publication number	US-2018071757-A1
Application number	US-201715683432-A
Country	US
Kind code	A1
Filing date	Aug 22, 2017
Priority date	Sep 14, 2016
Publication date	Mar 15, 2018
Grant date	—

Abstract

The invention relates to a device for rotating a fluid inside a spray nozzle, this device comprising a body defining at least one helical slot and/or a helical hole for the passage of all or part of the fluid. This device can be secured to a spray nozzle or a needle valve closing the spray nozzle. The invention also relates to an applicable device comprising such a device.

First claim

1 . A device for rotating a fluid inside a spray nozzle, this device comprising a body defining at least one helical slot and/or a helical hole for the passage of all or part of the fluid.

2 . The device according to claim 1 , wherein an enclosure surface of the body has a circular or elliptical section.

3 . The device according to claim 1 , wherein an enclosure surface of the body is at least partially cylindrical and/or frustoconical.

4 . The device according to claim 1 , wherein an enclosure surface of the body comprises a cylindrical upstream part and a frustoconical downstream part.

5 . The device according to claim 1 , further comprising a gripping handle, which has a smaller diameter relative to the body.

6 . The device according to claim 1 , wherein the length of the gripping handle is greater than or equal to 5 mm.

7 . The device according to claim 1 , wherein the device defines a central through bore for the passage of a needle valve closing the spray nozzle.

8 . The device according to claim 1 , wherein the device is manufactured by 3D printing.

9 . The device according to claim 1 , wherein the body comprises a cylindrical upstream part and a frustoconical downstream part, and wherein each helical slot extends continuously on the surface of the cylindrical upstream part and the surface of the frustoconical downstream part.

10 . The device according to claim 1 , wherein the body comprises a cylindrical upstream part and a frustoconical downstream part, and wherein each helical hole extends continuously through the cylindrical part and through the frustoconical downstream part of the body.

11 . An assembly comprising a device according to claim 1 and a part from among a spray nozzle and a needle valve closing the spray nozzle, wherein the device and said part are secured to one another or in a single piece.

12 . An application device, comprising an assembly according to claim 11 or a device according to claim 1 .

13 . The application device according to claim 12 , wherein the application device is a manual or automatic spray gun.

14 . The application device according to claim 12 , wherein the device is immobilized inside a fluid passage conduit defined by a spray nozzle and wherein the fluid passage conduit defines a housing for receiving the device that has a shape complementary to that of an enclosure surface of the body of the device.

15 . The application device according to claim 12 , comprising a spray nozzle that defines a fluid passage conduit, which comprises a flared and rounded discharge segment.

Assignees

• Exel Ind

Inventors

• Bennani Tarik
• Cognon Thibault
• Gaillet Romain

Classifications

• B05B1/34 Primary

  designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl (designed to control volume of flow B05B1/30) · CPC title

• B05B1/3415 Primary

  with swirl imparting inserts upstream of the swirl chamber · CPC title

• B05B7/10

  producing a swirling discharge · CPC title

• B05B1/3046

  the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice (B05B1/308 takes precedence) · CPC title

• B05B1/3468

  with means for controlling the flow of liquid entering or leaving the swirl chamber (B05B1/3452 takes precedence) · CPC title