# US 9,433,953 B2 · Reversible coating material nozzle for a spray gun for coating a workpiece with coating material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,433,953 B2 - Document ID: US9433953B2 - Status: Granted - Kind: B2 - Application number: 14/009,355 - Filed: 2012-04-03 - Published: 2014-02-13 - Granted: 2016-09-06 - Earliest claimed: 2011-04-04 - Assignees: J. Wagner GmbH - Applicants: Jurgen Ghesla; Rolf Mazenauer - Inventors: Jurgen Ghesla; Rolf Mazenauer - Web page: https://patentgrep.com/patent/US9433953B2 ## CPC - B05B 5/025: Discharge apparatus, e.g. electrostatic spray guns - B05B 5/03: characterised by the use of gas {, e.g. electrostatically assisted pneumatic spraying (B05B5/04, B05B5/043, B05B5/047 take precedence)} - B05B 7/0815: {with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter} - B05B 15/534: by reversing the nozzle relative to the supply conduit - B05B 1/042: {Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet (B05B1/044, B05B1/046 take precedence)} - B05B 9/01: Spray pistols, {discharge devices}(B05B9/03 takes precedence) - B05B 13/041: {with spray heads reciprocating along a straight line} - B05B 13/0431: {with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to three-dimensional [3D] surfaces} - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) ## Abstract The reversible coating material nozzle for a spray gun for coating a workpiece with coating material can be installed in a first and a second installation position in a nozzle mount of the spray gun and comprises a nozzle core having a nozzle core opening and a nozzle nipple that is connected to the nozzle core and has a nozzle nipple opening. In addition, a nozzle channel for the coating material is provided and reaches through the nozzle nipple and the nozzle core and connects the nozzle nipple opening to the nozzle core opening. The nozzle nipple has a cylindrical portion, which in the first installation position forms a form fit with the nozzle mount of the spray gun. In addition, a stop is provided. The ratio between the length (L) from the stop to the cylindrical portion and the nozzle diameter (D) lies in the range between 0.75 and 2.00. ## Claims ### Claim 1 A reversible coating material nozzle for a spray gun for coating a workpiece with coating material, which can be installed in an operating position and in a cleaning position in a nozzle mount of the spray gun, wherein a nozzle core having a nozzle core opening is provided, wherein a nozzle nipple having a nozzle nipple opening is provided, wherein the nozzle nipple forms a form fit with the nozzle core, wherein a nozzle channel for the coating material is provided, the nozzle channel reaching through the nozzle nipple and the nozzle core and connecting the nozzle nipple opening to the nozzle core opening, wherein the nozzle nipple opening is arranged in the operating position on the upstream side of the nozzle core, wherein the nozzle nipple has a cylindrical portion, which in the operating position forms a form fit with the nozzle mount of the spray gun, wherein an axial stop is provided, wherein the ratio between the axial length (L) from the axial stop to the axial edge of the cylindrical portion and the outer nozzle diameter (D) lies in the range between 0.75 and 2.00. ### Claim 2 (depends on 1) The coating material nozzle according to patent claim 1, wherein the ratio between the axial length (L) to the outer nozzle diameter (D) lies in the range between 0.80 and 1.35. ### Claim 3 (depends on 1) The coating material nozzle according to patent claim 1, wherein the nozzle nipple has a cone, which in the operating position forms a form fit with the nozzle mount of the spray gun, and wherein the nozzle core has a cone, which in the cleaning position forms a form fit with the nozzle mount. ### Claim 4 (depends on 1) The coating material nozzle according to claim 1, wherein the nozzle nipple is made of plastic. ### Claim 5 (depends on 4) The coating material nozzle according to claim 4, wherein the plastic is electrically non-conductive. ### Claim 6 (depends on 1) The coating material nozzle according to patent claim 1, wherein the nozzle core is made of carbide metal or ceramic. ### Claim 7 (depends on 1) The coating material nozzle according to claim 1, wherein the nozzle nipple has a further cylindrical portion, which reaches into the nozzle core. ### Claim 8 (depends on 1) The coating material nozzle according to claim 1, wherein a seal is provided between the nozzle core and the nozzle nipple. ### Claim 9 (depends on 1) The coating material nozzle according to claim 1, wherein a nozzle holder is provided, which holds together the nozzle core and the nozzle nipple. ### Claim 10 (depends on 9) The coating material nozzle according to patent claim 9, wherein the nozzle holder is made of plastic. ### Claim 11 (depends on 9) The coating material nozzle according to patent claim 9, wherein the connection between the nozzle holder and the nozzle nipple is formed as a snap-fit connection. ### Claim 12 (depends on 1) The coating material nozzle according to claim 1, wherein the nozzle nipple is an injection-moulded part, which surrounds the nozzle core in part. ### Claim 13 (depends on 1) The coating material nozzle according to claim 1, wherein a shoulder is provided which has a diameter of at least 5 mm and at most 15 mm and forms an axial stop. ### Claim 14 (depends on 13) The coating material nozzle according to patent claim 13, wherein the shoulder is formed in such a way that it forms a form fit with an air cap of the spray gun in the installed state. ### Claim 15 (depends on 13) The coating material nozzle according to claim 13, wherein the lateral surface of the shoulder has a flat area. ### Claim 16 (depends on 1) A spray gun for coating a workpiece with coating material, wherein a coating material nozzle according to claim 1 is provided. ### Claim 17 (depends on 16) The spray gun according to patent claim 16, wherein the nozzle mount has a bore for receiving the nozzle nipple. ### Claim 18 (depends on 16) The spray gun according to patent claim 16, wherein a high-voltage electrode is provided. ### Claim 19 (depends on 1) A method of coating a workpiece with coating ‘material, comprising: combining the nozzle of claim 1 with a spray gun, and spraying a coating on the workpiece by way of the nozzle. ### Claim 20 (depends on 1) A method for operating a spray gun for coating a workpiece with coating material according to claim 1, wherein the coating material nozzle is installed in the operating position in the spray gun to function in coating operation, and wherein the coating material nozzle is installed in the cleaning position in the spray gun to function in cleaning operation.