Spray nozzle comprising axial grooves to provide a balance supply to the vortex chamber

1. Spray nozzle designed to be mounted in a push button of a liquid distribution system, where said nozzle comprises a body equipped with an assembly tube that is defined by a front wall in which a distribution orifice is formed, wherein the inside face of said front wall is equipped with:

a vortex chamber that communicates with the distribution orifice;

at least two radial tubes to supply the liquid to said vortex chamber; and

an annular duct to supply the liquid to the upstream end of said tubes, wherein said nozzle is characterised in that the lateral inside wall of the tube is equipped with at least two axial grooves which respectively extend between an upstream end opening onto the rear edge of the tube and a downstream end opening onto the annular duct, wherein said grooves are positioned angularly so that each downstream end of a groove is equidistant from the two upstream ends of the tube adjacent to it on either side along the length of the annular duct.

2. Spray nozzle according to claim 1 , characterised in that the number of grooves is equal to the number of tubes.

3. Spray nozzle according to claim 2 , characterised in that the downstream ends of the grooves and the upstream ends of the tubes are respectively equi-spaced angularly, wherein said downstream ends of the grooves are offset angularly with respect to said upstream ends of the tubes by a pitch equal to 360° divided by twice the number of tubes.

4. The spray nozzle according to claim 3 , characterised in that the vortex chamber, the radial tubes and the annular supply duct are formed by hollow sections of the front wall.

5. The spray nozzle according to claim 3 , characterised in that the outside face of the rear edge of the tube is equipped with a radial protrusion to fix it to the push button.

6. The spray nozzle according to claim 2 , characterised in that the vortex chamber, the radial tubes and the annular supply duct are formed by hollow sections of the front wall.

7. The spray nozzle according to claim 2 , characterised in that the outside face of the rear edge of the tube is equipped with a radial protrusion to fix it to the push button.

8. The spray nozzle according to claim 1 , characterised in that the vortex chamber, the radial tubes and the annular supply duct are formed by hollow sections of the front wall.

9. The spray nozzle according to claim 8 , characterised in that the outside face of the rear edge of the tube is equipped with a radial protrusion to fix it to the push button.

10. Spray nozzle according to claim 1 , characterised in that the outside face of the rear edge of the tube is equipped with a radial protrusion to fix it to the push button.

11. Spray nozzle designed to be mounted in a push button of a liquid distribution system, where said nozzle comprises a body equipped with an assembly tube that is defined by a front wall in which a distribution orifice is formed, wherein the inside face of said front wall is equipped with:

a vortex chamber that communicates with the distribution orifice;

at least two radial tubes to supply the liquid to said vortex chamber; and

an annular duct to supply the liquid to the upstream end of said tubes, wherein said nozzle is characterised in that the lateral inside wall of the tube is equipped with at least two axial grooves which respectively extend between an upstream end opening onto the rear edge of the tube and a downstream end opening onto the annular duct, wherein said grooves are positioned angularly so that each downstream end of a groove is equidistant from the two upstream ends of the tube adjacent to it on either side along the length of the annular duct;

wherein said push button comprises a body in which a distribution path is formed, said distribution path having a downstream end which opens onto a cavity formed inside said body; and

wherein said spray nozzle is associated inside said cavity to the downstream end of the distribution path that communicates with the axial grooves.

12. Push button according to claim 11 , characterised in that the cavity comprises a central pin onto which the lateral inside wall of the tube is fitted to leave the grooves free.

13. Push button according to claim 12 , characterised in that the distribution path comprises from upstream to downstream, a radial duct, an axial duct and an annular duct formed around the pin, wherein the upstream end of the grooves opens onto said annular duct.

14. The push button according to claim 13 , characterised in that the front wall of the tube is in contact with the end of the pin, wherein the vortex chamber, the radial tubes and the annular supply duct are defined axially between said wall and said end.

15. Push button according to claim 12 , characterised in that the front wall of the tube is in contact with the end of the pin, wherein the vortex chamber, the radial tubes and the annular supply duct are defined axially between said wall and said end.

16. Spray nozzle designed to be mounted in a push button of a liquid distribution system, where said nozzle comprises a body equipped with an assembly tube that is defined by a front wall in which a distribution orifice is formed, wherein the inside face of said front wall is equipped with:

a vortex chamber that communicates with the distribution orifice;

at least two radial tubes to supply the liquid to said vortex chamber; and

an annular duct to supply the liquid to the upstream end of said tubes, wherein said nozzle is characterised in that the lateral inside wall of the tube is equipped with at least two axial grooves which respectively extend between an upstream end opening onto the rear edge of the tube and a downstream end opening onto the annular duct, wherein said grooves are positioned angularly so that each downstream end of a groove is equidistant from the two upstream ends of the tube adjacent to it on either side along the length of the annular duct;

wherein said push button comprises a body in which a distribution path is formed, said distribution path having a downstream end which opens onto a cavity formed inside said body; and

wherein said spray nozzle is associated inside said cavity to the downstream end of the distribution path that communicates with the axial grooves; and

wherein said liquid distribution system comprises a pump or a manual actuated valve onto which a push button is mounted to allow liquid to be sprayed.