# US 11,432,950 B2 · Stent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,432,950 B2 - Document ID: US11432950B2 - Status: Granted - Kind: B2 - Application number: 16/495,021 - Filed: 2018-03-22 - Published: 2020-12-03 - Granted: 2022-09-06 - Earliest claimed: 2017-03-23 - Assignees: Nipro Corporation - Applicants: Nipro Corporation - Inventors: Koji Akimoto - Web page: https://patentgrep.com/patent/US11432950B2 ## CPC - A61F 2/88: the wire-like elements formed as helical or spiral coils - A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other - A61F 2002/91533: {characterised by the phase between adjacent bands} - A61F 2002/9155: {Adjacent bands being connected to each other} - A61F 2002/91575: {connected peak to trough} - A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section - A61F 2250/0036: differing in thickness - A61F 2250/0037: differing in height or in length - 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) ## Abstract A stent having a line-shaped body that extends helically in a circumferential direction while reciprocating in an axial direction by continuously alternating straight parts and curved parts, wherein the plurality of straight parts in the line-shaped body have a substantially constant thickness throughout the entire stent, and a certain number of the plurality of curved parts in the line-shaped body have different thicknesses. ## Claims ### Claim 1 A stent comprising a line-shaped body including a plurality of straight parts and a plurality of curved parts, the line-shaped body extending in a helical form in a circumferential direction while reciprocating in an axial direction by continuously alternating the plurality of straight parts and the plurality of curved parts, wherein: an entirety of the plurality of straight parts of the line-shaped body have a substantially constant thickness and width throughout the stent; the plurality of curved parts include: basic-thick curved parts that make up a largest number of the plurality of the curved parts in the stent and have a substantially constant width and thickness, a thickened curved part that is thicker than the basic-thick curved parts, and a thinned curved part that is thinner than the basic-thick curved parts; in a central portion of the stent along the axial direction, the plurality of straight parts have a roughly constant length dimension; in opposite end portions of the stent along the axial direction, the plurality of straight parts include a long straight part having a length that is longer than the roughly constant length dimension of the plurality of straight parts in the central portion of the stent, and the long straight part is connected to the thickened curved part; and in the opposite end portions of the stent, the plurality of straight parts include a short straight part having a length that is shorter than the roughly constant length dimension of the plurality of straight parts in the central portion of the stent, and the short straight part is connected to the thinned curved part. ### Claim 2 (depends on 1) The stent according to claim 1, wherein height dimensions of the plurality of straight parts and the plurality of curved parts of the line-shaped body are roughly constant. ### Claim 3 (depends on 1) The stent according to claim 1, wherein the long straight part is provided at a position approximately one round from a distal end of the line-shaped body in the circumferential direction of the stent. ### Claim 4 (depends on 1) The stent according to claim 1, wherein the thinned curved part is convex outward in the axial direction of the stent at a position closest to a lengthwise distal end of the line-shaped body. ### Claim 5 (depends on 1) The stent according to claim 1, wherein an inclination angle of a helix of the line-shaped body with respect to a central axis of the stent gradually increases toward an axial end thereof such that the inclination angle approaches a right angle with respect to the central axis of the stent. ### Claim 6 (depends on 1) The stent according to claim 1, wherein the line-shaped body further includes a linking part that links winding portions thereof to each other that are adjacent in the axial direction of the stent. ### Claim 7 (depends on 1) The stent according to claim 1, wherein at each axial end of the stent, when a lengthwise end of the line-shaped body is defined as a reference position of 0 degrees in the circumferential direction of the stent, with respect to a period of wave shape constituted by alternate continuation of the plurality of straight parts and the plurality of curved parts of the line-shaped body and reciprocating in the axial direction, the thinned curved part and the thickened curved part are provided within a range of +1.5 periods to −3.5 periods in the circumferential direction of the stent. ### Claim 8 (depends on 1) The stent according to claim 1, wherein each of the plurality of straight parts extends from a respective curved part of the plurality of curved parts in a length direction, and the length direction is orthogonal to the substantially constant thickness and width of the plurality of straight parts. ### Claim 9 (depends on 1) The stent according to claim 1, wherein the substantially constant thickness of the plurality of straight parts is a cross-sectional area that extends in a width direction and a height direction of the plurality of straight parts and is orthogonal to a length direction of the plurality of straight parts. ### Claim 10 (depends on 1) The stent according to claim 1, wherein the substantially constant width and thickness of the basic-thick curved parts is larger than the substantially constant width and thickness of the plurality of straight parts. ### Claim 11 (depends on 1) The stent according to claim 1, wherein lengthwise terminal ends of the line-shaped body formed on opposite axial ends of the stent are each provided with a disc part having a circular disk shape, and the short straight part is adjacent to the disc part in the circumferential direction. ### Claim 12 (depends on 1) The stent according to claim 1, wherein the thickened curved part and the thinned curved part are not directly joined to another curved part of the plurality of curved parts. ### Claim 13 (depends on 1) The stent according to claim 1, wherein: the line-shaped body includes: band-shaped bodies that each have a helical form in the circumferential direction, the band-shaped bodies being arranged adjacent to each other in the axial direction, and linking parts in which the band-shaped bodies that are adjacent to each other in the axial direction are joined together; and the thickened curved part and the thinned curved part do not form one of the linking parts. ### Claim 14 (depends on 1) The stent according to claim 1, wherein the long straight part, the thickened curved part, the short straight part, and the thinned curved part each form an axially outermost edge of an axial end of the stent in the axial direction.