# US 11,112,044 B2 · Anti-dropping steel ring used in press-fitting type pipe fitting and fixing sealing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,044 B2 - Document ID: US11112044B2 - Status: Granted - Kind: B2 - Application number: 16/315,453 - Filed: 2018-10-09 - Published: 2020-04-09 - Granted: 2021-09-07 - Earliest claimed: 2018-10-09 - Assignees: Zhuji City Howhi Air Conditioners Made Co., Ltd. - Applicants: Zhuji City Howhi Air Conditioners Made Co., Ltd. - Inventors: Yuguang He - Web page: https://patentgrep.com/patent/US11112044B2 ## CPC - F16L 37/091: by means of a ring provided with teeth or fingers - F16L 13/142: {with a sealing element inserted into the female part before crimping or rolling} - F16L 21/03: placed in the socket before connection ({F16L21/022,} F16L21/025 take precedence) - F16L 37/05: tightened by the pressure of a mechanical organ - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract An anti-dropping steel ring used in a press-fitting type pipe fitting includes an anti-dropping steel ring, wherein the anti-dropping steel ring is provided with first snapping parts and second snapping parts distributed in a circumferential direction, the first snapping part is configured to extend from an inner circumferential wall of the anti-dropping steel ring in a radial direction, and the second snapping part is configured to extend from a circumferential edge of the anti-dropping steel ring in an axial direction and lean inwards. ## Claims ### Claim 1 An anti-dropping steel ring used in a press-fitting type pipe fitting, the anti-dropping steel ring comprising: first snapping parts and second snapping parts distributed in a circumferential direction, the first snapping part being configured to extend from an inner circumferential wall of the anti-dropping steel ring in a radial direction, and the second snapping part being configured to extend from a circumferential edge of the anti-dropping steel ring in an axial direction and lean inwards; wherein the anti-dropping steel ring is provided with a first interface part and a second interface part, the first interface part is a convex part, the second interface part is a concave part that can accommodate the convex part, and the first interface part and the second interface part are configured to implement closing of the anti-dropping steel ring by means of cooperation of the concave part and the convex part; wherein both the first interface part and the second interface part are configured to be V-shaped to prevent the anti-dropping steel ring from being dislocated. ### Claim 2 (depends on 1) The anti-dropping steel ring according to claim 1, wherein the first snapping part and the inner circumferential wall of the anti-dropping steel ring are molded integrally. ### Claim 3 (depends on 1) The anti-dropping steel ring according to claim 1, wherein the first snapping part is a toothed protrusion obtained by stamping the inner circumferential wall of the anti-dropping steel ring. ### Claim 4 (depends on 1) The anti-dropping steel ring according to claim 1, wherein the first snapping part and the second snapping part are staggered with respect to each other in the circumferential direction. ### Claim 5 (depends on 1) A fixing sealing device comprising: an anti-dropping steel ring according to claim 1, a press-fitting end of the fixing sealing device being provided with a mounting part, the anti-dropping steel ring, a plastic washer, and a sealing ring being disposed in the mounting part, and the plastic washer being located between the anti-dropping steel ring and the sealing ring. ### Claim 6 (depends on 5) The fixing sealing device according to claim 5, wherein an outer side of the plastic washer is provided with a hook-shaped flange, and a groove is formed between the hook-shaped flange and a body of the plastic washer. ### Claim 7 (depends on 6) The fixing sealing device according to claim 6, wherein the groove is configured to be compressible when being pressed. ### Claim 8 (depends on 5) The fixing sealing device according to claim 5, wherein both the first snapping part and the second snapping part of the anti-dropping steel ring face towards a positioning end of the fixing sealing device. ### Claim 9 (depends on 5) The fixing sealing device according to claim 5, wherein the first snapping part and the inner circumferential wall of the anti-dropping steel ring are molded integrally. ### Claim 10 (depends on 9) The fixing sealing device according to claim 9, wherein an outer side of the plastic washer is provided with a hook-shaped flange, and a groove is formed between the hook-shaped flange and a body of the plastic washer. ### Claim 11 (depends on 10) The fixing sealing device according to claim 10, wherein the groove is configured to be compressible when being pressed. ### Claim 12 (depends on 9) The fixing sealing device according to claim 9, wherein both the first snapping part and the second snapping part of the anti-dropping steel ring face towards a positioning end of the fixing sealing device. ### Claim 13 (depends on 5) The fixing sealing device according to claim 5, wherein the first snapping part is a toothed protrusion obtained by stamping the inner circumferential wall of the anti-dropping steel ring. ### Claim 14 (depends on 13) The fixing sealing device according to claim 13, wherein an outer side of the plastic washer is provided with a hook-shaped flange, and a groove is formed between the hook-shaped flange and a body of the plastic washer. ### Claim 15 (depends on 14) The fixing sealing device according to claim 14, wherein the groove is configured to be compressible when being pressed. ### Claim 16 (depends on 13) The fixing sealing device according to claim 13, wherein both the first snapping part and the second snapping part of the anti-dropping steel ring face towards a positioning end of the fixing sealing device. ### Claim 17 (depends on 5) The fixing sealing device according to claim 5, wherein the first snapping part and the second snapping part are staggered with respect to each other in the circumferential direction. ### Claim 18 (depends on 17) The fixing sealing device according to claim 17, wherein an outer side of the plastic washer is provided with a hook-shaped flange, and a groove is formed between the hook-shaped flange and a body of the plastic washer. ### Claim 19 (depends on 18) The fixing sealing device according to claim 18, wherein the groove is configured to be compressible when being pressed. ### Claim 20 (depends on 17) The fixing sealing device according to claim 17, wherein both the first snapping part and the second snapping part of the anti-dropping steel ring face towards a positioning end of the fixing sealing device. ### Claim 21 (depends on 5) The fixing sealing device according to claim 5, wherein the anti-dropping steel ring is provided with a first interface part and a second interface part, the first interface part is a convex part, the second interface part is a concave part that can accommodate the convex part, and the first interface part and the second interface part are configured to implement closing of the anti-dropping steel ring by means of cooperation of the concave part and the convex part. ### Claim 22 (depends on 21) The fixing sealing device according to claim 21, wherein an outer side of the plastic washer is provided with a hook-shaped flange, and a groove is formed between the hook-shaped flange and a body of the plastic washer. ### Claim 23 (depends on 22) The fixing sealing device according to claim 22, wherein the groove is configured to be compressible when being pressed. ### Claim 24 (depends on 21) The fixing sealing device according to claim 21, wherein both the first snapping part and the second snapping part of the anti-dropping steel ring face towards a positioning end of the fixing sealing device.