# US 10,500,599 B2 · Thermal spraying torch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,599 B2 - Document ID: US10500599B2 - Status: Granted - Kind: B2 - Application number: 16/087,533 - Filed: 2016-03-23 - Published: 2019-04-04 - Granted: 2019-12-10 - Earliest claimed: 2016-03-23 - Assignees: Nissan Motor Co., Ltd. - Applicants: Nissan Motor Co., Ltd. - Inventors: Yoshito Utsumi; Satoru Sakurai; Yoshitsugu Noshi - Web page: https://patentgrep.com/patent/US10500599B2 ## CPC - B05B 7/224: {the material having originally the shape of a wire, rod or the like} - B05B 15/50: Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter - C23C 4/12: characterised by the method of spraying - H05H 1/42: with provisions for introducing materials into the plasma, e.g. powder or liquid {(arc stabilising or constricting arrangements H05H1/3405; coaxial protecting fluids H05H1/341)} - B05B 13/0636: {by means of rotatable spray heads or nozzles} - 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) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS ## Abstract A thermal spraying torch configured to spray a molten material onto a thermal sprayed surface of a work object and form a thermal sprayed coating has a discharge port configured to discharge the molten material, a discharge port periphery located on a peripheral edge of the discharge port on a front side in a discharge direction of the molten material and extending in the discharge direction, and an external surface continuous with a front end of the discharge port periphery. The discharge port periphery includes first section to which the molten material adheres more easily than to the external surface. The external surface includes a second section to which the molten material adheres less easily than to the discharge port periphery. ## Claims ### Claim 1 A thermal spraying torch configured to spray a molten material onto a thermal sprayed surface of a work object and form a thermal sprayed coating, comprising: a discharge port configured to discharge the molten material; a discharge port periphery located on a peripheral edge of the discharge port on a front side in a discharge direction of the molten material and extending in the discharge direction; and an external surface continuous with a front end of the discharge port periphery, wherein the discharge port periphery comprises a first section structured to have a first adherence property for the molten material higher than the external surface, wherein the external surface comprises a second section structured to have a second adherence property for the molten material lower than the discharge port periphery, wherein the first section is positioned in a direct path of the molten material discharged from the discharge port, and wherein the second section is positioned outside of the direct path of the molten material discharged from the discharge port. ### Claim 2 (depends on 1) The thermal spraying torch according to claim 1, wherein the first section of the discharge port periphery has higher surface roughness than surface roughness of the second section of the external surface. ### Claim 3 (depends on 1) The thermal spraying torch according to claim 1, wherein the second section of the external surface has lower surface roughness than surface roughness of the first section of the discharge port periphery. ### Claim 4 (depends on 1) The thermal spraying torch according to claim 1, wherein the first section of the discharge port periphery is made of a material with lower thermal conductivity than the second section of the external surface. ### Claim 5 (depends on 1) The thermal spraying torch according to claim 1, wherein the first section of the discharge port periphery is made of a material with higher affinity for the molten material than the second section of the external surface. ### Claim 6 (depends on 1) The thermal spraying torch according claim 1, wherein the second section of the external surface is made of a material with lower affinity for the molten material than the first section of the discharge port periphery. ### Claim 7 (depends on 1) The thermal spraying torch according to claim 1, wherein an end portion of the external surface on a side continuous with the discharge port periphery is a surface to which the molten material adheres more easily than to the second section of the external surface. ### Claim 8 (depends on 1) The thermal spraying torch according to claim 1, wherein the discharge port periphery includes a side wall of a recess portion that is recessed with respect to the external surface, and wherein the side wall has a tapered shape wider on the front side in the discharging direction of the discharge port. ### Claim 9 (depends on 1) The thermal spraying torch according to claim 1, comprising: a torch main body having the discharge port; and a cover covering the torch main body and detachably attached to the torch main body, wherein the second section of the external surface is provided in the cover. ### Claim 10 (depends on 1) The thermal spraying torch according to claim 1, wherein the first section of the discharge port periphery is structured to have a higher adherence property for the molten material than the second section of the external surface. ### Claim 11 A thermal spraying torch configured to spray a molten material onto a thermal sprayed surface of a work object and form a thermal sprayed coating, comprising: a discharge port configured to discharge the molten material; a discharge port periphery located on a peripheral edge of the discharge port on a front side in a discharge direction of the molten material and extending in the discharge direction; and an external surface continuous with a front end of the discharge port periphery, wherein the discharge port periphery comprises a first section structured to have a first adherence property for the molten material higher than the external surface, wherein the external surface comprises a second section structured to have a second adherence property for the molten material lower than the discharge port periphery, and wherein the second section of the external surface is made of a material with higher thermal conductivity than the first section of the discharge port periphery. ### Claim 12 (depends on 11) The thermal spraying torch according to claim 11, wherein the first section of the discharge port periphery is structured to have a higher adherence property for the molten material than the second section of the external surface. ### Claim 13 A thermal spraying torch configured to spray a molten material onto a thermal sprayed surface of a work object and form a thermal sprayed coating, comprising: a discharge port configured to discharge the molten material; a discharge port periphery located on a peripheral edge of the discharge port on a front side in a discharge direction of the molten material and extending in the discharge direction; and an external surface continuous with a front end of the discharge port periphery, wherein the discharge port periphery comprises a first section structured to have a first adherence property for the molten material higher than the external surface, wherein the external surface comprises a second section structured to have a second adherence property for the molten material lower than the discharge port periphery, wherein the work object includes a circular hole and the thermal sprayed surface is an inner surface of the circular hole, wherein the thermal spraying torch is configured to discharge the molten material from the discharge port while being rotated with the thermal spraying torch inserted in the circular hole, and wherein the second section of the external surface is provided at least in a rear portion of the thermal spraying torch in a rotating direction of the thermal spraying torch. ### Claim 14 (depends on 13) The thermal spraying torch according to claim 13, wherein the first section of the discharge port periphery is structured to have a higher adherence property for the molten material than the second section of the external surface.