# US 12,004,979 B2 · Method for manufacturing stent using shape memory alloy wire, stent manufactured thereby, and jig for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,979 B2 - Document ID: US12004979B2 - Status: Granted - Kind: B2 - Application number: 16/912,349 - Filed: 2020-06-25 - Published: 2020-10-15 - Granted: 2024-06-11 - Earliest claimed: 2016-02-15 - Assignees: Taewoong Medical Co., Ltd. - Applicants: Taewoong Medical Co., Ltd.; Kyong Min Shin - Inventors: Kyong Min Shin; Young Ill Hong; Se Ik Park - Web page: https://patentgrep.com/patent/US12004979B2 ## CPC - A61F 2/90: characterised by a net-like or mesh-like structure - B21F 1/00: Bending wire other than coiling; Straightening wire - B21F 45/008: {of medical instruments, e.g. stents or corneal rings} - A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol - A61F 2220/0083: using hook and loop-type fasteners - A61F 2240/00: Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof - A61F 2240/001: Designing or manufacturing processes - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - B21F: WORKING OR PROCESSING OF METAL WIRE (rolling of metal wire B21B1/16; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C) ## Abstract The present invention relates to a stent that uses a shape memory alloy wire, the stent being an expansion device installed on a part of a body lumen, which is constricted, or which has been constricted, so as to widen the passage of the lumen in response to the lesion part. The purpose of the present invention is to provide a method for manufacturing a stent using a shape memory alloy wire such that the stent maintains a high degree of conformability in a bent portion of a body lumen in which the same is inserted while substantially improving rigidness and durability against continuously applied fatigue, a stent manufactured thereby, and a jig for manufacturing the same. ## Claims ### Claim 1 A jig for manufacturing a stent using a shape memory alloy wire, the jig comprising: a body formed in a vertically long cylindrical shape with a circumference forming a hollow part of a stent to be manufactured; and detachable pins interconnecting the wire by being inserted at multiple split positions around the body in X and Y-axis directions, wherein equator lines (A1, A3, A5, A7, A9, A11, and A13) of the jig are divided by being spaced by a horizontal diagonal distance (Ph) of a cell forming a rhombic geometry in the X-axis direction from an arbitrary selected origin on the circumferential surface of the body, and the equator lines (A2, A4, A6, A8, A10, A12, and A14) are divided by being spaced by the horizontal diagonal distance (Ph) at locations apart by a length (Ph1) bisecting the equator line, thereby forming the equator lines (A1 to A14), in a longitudinal direction of the jig, dividing lines (B3, B5, B7, B9, B11, and B13) are divided by being spaced by a length (Pv1) bisecting the dividing line B1, which is the reference in the Y-axis direction from the origin, and a vertical diagonal distance (Pv) of a cell forming a rhombic geometry from the dividing line (B1), and the dividing lines (B2, B4, B6, B8, B10, B12, and B14) are divided into the same number of the dividing lines (B1, B3, B5, B7, B9, B11, and B13) at locations apart by an offset pitch (Pv2) from the dividing line (B1), thereby forming the dividing lines (B1 to B14), and on the jig the pins on the jig are inserted into intersections where the first to sixth pattern portions and the first a to sixth a pattern portions are passed to form an interconnected pattern, wherein the interconnected pattern formed on the jig comprises a) a plurality of first stent loops connected by first connecting portions and b) a plurality of second stent loops connected by second connecting portions, and the first stent loops including the first connection portions overlap the second stent loops including the second connecting portions. ### Claim 2 (depends on 1) The jig of claim 1, wherein the first and first a pattern portions comprise a wire pattern for both the first and first a pattern portions having a downward pitch length 2L and an upward pitch length L connected at a vertex therebetween. ### Claim 3 (depends on 1) The jig of claim 1, wherein the second and second a pattern portions comprise a wire pattern for both the second and second a pattern portions having a downward length L and an upward length 2 L connected at a vertex therebetween, with bent wire sections proceeding the downward length L. ### Claim 4 (depends on 1) The jig of claim 1, wherein the third and third a pattern portions comprise a wire pattern for both the third and third a pattern portions having a downward length L and an upward length 2 L connected at a vertex therebetween, with more bent wire sections before the downward length than after the upward length. ### Claim 5 (depends on 1) The jig of claim 1, wherein the fourth and fourth a pattern portions comprise a wire pattern for both the fourth and fourth a pattern portions having a downward length L and an upward length 2 L connected at a vertex therebetween, with bent wire sections before the downward length and after the upward length. ### Claim 6 (depends on 1) The jig of claim 1, wherein the fifth and fifth a pattern portions comprise a wire pattern for both the fifth and fifth a pattern portions having a downward length L and an upward length 2 L connected at a vertex therebetween, with fewer bent wire sections before the downward length than after the upward length. ### Claim 7 (depends on 1) The jig of claim 1, wherein the sixth and sixth a pattern portions comprises a wire pattern for both the fifth and fifth a pattern portions having a downward length L and an upward length 2 L connected at a vertex therebetween, with bent wires sections following the upward length. ### Claim 8 (depends on 1) The jig of claim 1, wherein the first stent loops are not hook-coupled to the second stent loops. ### Claim 9 (depends on 1) The jig of claim 1, wherein the first connecting portions and the second connecting portions are not evenly arranged in a horizontal or vertical direction. ### Claim 10 (depends on 1) The jig of claim 1, wherein the first stent loops are double-connected to each other with an offset pitch. ### Claim 11 (depends on 1) The jig of claim 1, wherein the first stent loops are double-connected to each other with an offset pitch spaced downward. ### Claim 12 (depends on 1) The jig of claim 1, wherein the second stent loops overlapped by the first stent loops are double-connected to each other with an offset pitch. ### Claim 13 (depends on 1) The jig of claim 1, wherein the second stent loops overlapped by the first stent loops are double-connected to each other with an offset pitch spaced downward.