# US 11,110,478 B2 · High-pressure airless spray nozzle assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,110,478 B2 - Document ID: US11110478B2 - Status: Granted - Kind: B2 - Application number: 16/279,653 - Filed: 2019-02-19 - Published: 2019-11-07 - Granted: 2021-09-07 - Earliest claimed: 2018-05-04 - Assignees: Qua Tech Limited - Applicants: Wuxi Jinheda Precision Manufacturing Co., Ltd - Inventors: Zhenyu Wang; Qinghua Li - Web page: https://patentgrep.com/patent/US11110478B2 ## CPC - B05B 15/534: by reversing the nozzle relative to the supply conduit - B05B 1/02: designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) - B05B 7/02: Spray pistols; Apparatus for discharge (for spraying particulate material B05B7/14; with means for heating the material to be sprayed B05B7/16; with means for supplying fluent material to a discharge device B05B7/24) - B05B 15/16: for preventing non-intended contact between spray heads or nozzles and foreign bodies, e.g. nozzle guards - 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 A saddle seal assembly for a high-pressure airless spray nozzle having a spray tip includes a metal sealing sleeve and a cylindrical elastic seal. The metal sealing sleeve may include a first saddle-shaped semi-cylinder surface closely matching with an outer surface of the spray tip to form an outer hard sealing structure. The cylindrical elastic seal may include a second saddle-shaped semi-cylinder surface closely matching with the outer surface of the spray tip to form an inner flexible sealing structure. A first end portion of the cylindrical elastic seal is configured to be inserted into the metal sealing sleeve, and the first saddle-shaped semi-cylinder surface and the second saddle-shaped semi-cylinder surface are configured to be spliced to form a continuous saddle-shaped semi-cylinder surface, to thereby seal a stepped inlet hole of the high-pressure airless spray nozzle. ## Claims ### Claim 1 A saddle seal assembly for a high-pressure airless spray nozzle having a spray tip, comprising: a metal sealing sleeve including a flat inner coupling plane, a first saddle-shaped semi-cylinder surface, and a positioning surface disposed at an end of the metal sealing sleeve, the positioning surface being adjacent to the first saddle-shaped semi-cylinder surface, the flat inner coupling plane being adjacent to the first saddle-shaped semi-cylinder surface, the first saddle-shaped semi-cylinder matching with an outer surface of the spray tip to form an outer hard sealing structure; and a cylindrical elastic seal including a flat end portion and a second saddle-shaped semi-cylinder surface, the flat end portion being adjacent to the second saddle-shaped semi-cylinder surface, the second saddle-shaped semi-cylinder surface matching with the outer surface of the spray tip to form an inner flexible sealing structure, wherein the cylindrical elastic seal is configured to be releasably inserted into the metal sealing sleeve with the flat end portion of the cylindrical elastic seal and extended beyond the first saddle-shaped semi-cylinder surface, wherein the flat end portion of the cylindrical elastic seal is adapted to fit with the flat inner coupling plane of the metal sealing sleeve to prevent circumferential rotation, and wherein the first saddle-shaped semi-cylinder surface and the second saddle-shaped semi-cylinder surface are configured to be spliced to form a continuous saddle-shaped semi-cylinder surface with the first saddle-shaped semi-cylinder surface serving as a preliminary seal and the second saddle-shaped semi-cylinder surface serving as a complemental seal, to thereby seal a stepped inlet hole of the high-pressure airless spray nozzle. ### Claim 2 (depends on 1) The saddle seal assembly of claim 1, further comprising a ring collar disposed on a second end portion of the cylindrical elastic seal, wherein the ring collar abuts against a first end portion of the metal sealing sleeve, to thereby prevent the metal sealing sleeve from coming off the cylindrical elastic seal. ### Claim 3 (depends on 2) The saddle seal assembly of claim 2, wherein the metal sealing sleeve is fitted with the outer surface of the cylindrical elastic seal to form the saddle seal assembly. ### Claim 4 (depends on 2) The saddle seal assembly of claim 2, wherein: the flat inner coupling plane of the metal sealing sleeve is configured to be disposed at the flat end portion of the cylindrical elastic seal to prevent circumferential rotation, the metal sealing sleeve further comprises at least one outer coupling plane disposed on the inner surface of the metal sealing sleeve, and the inner coupling plane is configured to be fitted with the at least one outer coupling plane and is disposed at the first end portion of the cylindrical elastic seal to thereby prevent the metal sealing sleeve from rotating relative to the cylindrical elastic seal and to avoid a gap between the saddle-shaped semi-cylinder surface. ### Claim 5 (depends on 2) The saddle seal assembly of claim 2, wherein the metal sealing sleeve further comprises: the positioning surface disposed at the second end portion of the metal sealing sleeve and configured to abut against a retaining step disposed within the high-pressure airless spray nozzle to thereby prevent the metal sealing sleeve from moving toward the spray tip. ### Claim 6 (depends on 5) The saddle seal assembly of claim 5, wherein the outer diameter of the positioning surface is smaller than or equal to the outer diameter of the ring collar. ### Claim 7 (depends on 2) The saddle seal assembly of claim 2, wherein the cylindrical elastic seal further comprises a groove around the ring collar, and an O-ring embedded within the groove. ### Claim 8 (depends on 1) The saddle seal assembly of claim 1, wherein the cylindrical elastic seal is made of an elastic material. ### Claim 9 (depends on 8) The saddle seal assembly of claim 8, wherein the elastic material is nylon or rubber. ### Claim 10 A high-pressure airless spray nozzle, comprising: a spray tip guard; a spray tip configured to be inserted into the spray tip guard perpendicularly to the axis of the spray tip guard; and a saddle seal assembly configured to be inserted into the spray tip guard along the axis of the spray tip guard, wherein the saddle seal assembly includes: a metal sealing sleeve including a flat inner coupling plane, a first saddle-shaped semi-cylinder surface, and a positioning surface disposed at an end of the metal sealing sleeve, the positioning surface being adjacent to the first saddle-shaped semi-cylinder surface, the flat inner coupling plane being adjacent to the first saddle-shaped semi-cylinder surface, the first saddle-shaped semi-cylinder matching with an outer surface of the spray tip to form an outer hard sealing structure; and a cylindrical elastic seal including a flat end portion and a second saddle-shaped semi-cylinder surface, the flat end portion being adjacent to the second saddle-shaped semi-cylinder surface, the second saddle-shaped semi-cylinder matching with the outer surface of the spray tip to form an inner flexible sealing structure, wherein the cylindrical elastic seal is configured to be releasably inserted into the metal sealing sleeve with the flat end portion of the cylindrical elastic seal and extended beyond the first saddle-shaped semi-cylinder surface, wherein the flat end portion of the cylindrical elastic seal is adapted to fit with the flat inner coupling plane of the metal sealing sleeve to prevent circumferential rotation, and wherein the first saddle-shaped semi-cylinder surface and the second saddle-shaped semi-cylinder surface are configured to be spliced to form a continuous saddle-shaped semi-cylinder surface with the first saddle-shaped semi-cylinder surface serving as a preliminary seal and the second saddle-shaped semi-cylinder surface serving as a complemental seal, to thereby seal a stepped inlet hole of the high-pressure airless spray nozzle. ### Claim 11 (depends on 10) The high-pressure airless spray nozzle of claim 10, wherein the saddle seal assembly further comprising a ring collar disposed on a second end portion of the cylindrical elastic seal, wherein the ring collar abuts against a first end portion of the metal sealing sleeve, to thereby prevent the metal sealing sleeve from coming off the cylindrical elastic seal. ### Claim 12 (depends on 11) The high-pressure airless spray nozzle of claim 11, wherein the metal sealing sleeve is fitted with the outer surface of the cylindrical elastic seal to form the saddle seal assembly. ### Claim 13 (depends on 11) The high-pressure airless spray nozzle of claim 11, wherein: the cylindrical elastic seal further comprises a flat inner coupling plane of the metal sealing sleeve is configured to be disposed at the flat end portion of the cylindrical elastic seal to prevent circumferential rotation, the metal sealing sleeve further comprises at least one outer coupling plane disposed on the inner surface of the metal sealing sleeve, and the inner coupling plane is configured to be fitted with the at least one outer coupling plane and is disposed at the first end portion of the cylindrical elastic seal to thereby prevent the metal sealing sleeve from rotating relative to the cylindrical elastic seal and to avoid a gap between the saddle-shaped semi-cylinder surface. ### Claim 14 (depends on 11) The high-pressure airless spray nozzle of claim 11, wherein the metal sealing sleeve further comprises: the positioning surface disposed at the second end portion of the metal sealing sleeve and configured to abut against a retaining step disposed within the high-pressure airless spray nozzle to thereby prevent the metal sealing sleeve from moving toward the spray tip. ### Claim 15 (depends on 14) The high-pressure airless spray nozzle of claim 14, wherein the outer diameter of the positioning surface is smaller than or equal to the outer diameter of the ring collar. ### Claim 16 (depends on 11) The high-pressure airless spray nozzle of claim 11, wherein the cylindrical elastic seal further comprises a groove around the ring collar, and an O-ring embedded within the groove. ### Claim 17 (depends on 10) The high-pressure airless spray nozzle of claim 10, wherein the cylindrical elastic seal is made of an elastic material. ### Claim 18 (depends on 17) The high-pressure airless spray nozzle of claim 17, wherein the elastic material is nylon or rubber. ### Claim 19 (depends on 10) The high-pressure airless spray nozzle of claim 10, wherein the spray tip guard further comprises a mounting nut and a wear-resistant inner sleeve, and the spray tip is adapted to be inserted into a connection hole defined within the wear-resistant inner sleeve. ### Claim 20 (depends on 19) The high-pressure airless spray nozzle of claim 19, wherein the wear-resistant inner sleeve is made of a metal material.