# US 11,439,523 B2 · Stent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,523 B2 - Document ID: US11439523B2 - Status: Granted - Kind: B2 - Application number: 16/825,376 - Filed: 2020-03-20 - Published: 2020-10-08 - Granted: 2022-09-13 - Earliest claimed: 2019-04-02 - Assignees: BCM Co., Ltd. - Applicants: BCM Co., Ltd. - Inventors: Byung Cheol Myung - Web page: https://patentgrep.com/patent/US11439523B2 ## CPC - A61F 2/852: Two or more distinct overlapping stents - A61F 2/07: Stent-grafts - A61F 2/848: having means for fixation to the vessel wall, e.g. barbs - A61F 2/90: characterised by a net-like or mesh-like structure - A61F 2002/072: {Encapsulated stents, e.g. wire or whole stent embedded in lining} - A61F 2002/828: {Means for connecting a plurality of stents allowing flexibility of the whole structure} - A61F 2002/8486: {provided on at least one of the ends} - A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol - A61F 2220/0008: Fixation appliances for connecting prostheses to the body - A61F 2220/0075: sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable - A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section - A61F 2250/0039: differing in diameter - A61F 2250/0063: Nested prosthetic parts - 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 an improved anti-sliding function is proposed. The stent includes an inner stent and a pair of outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, in which each of the outer stents is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section; and the pair of outer stents are fitted on both ends of the inner stent such that the enlarged sections of the outer stents face each other, and spaces of the inner stent and spaces of the bending sections of the outer stents are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stents. ## Claims ### Claim 1 A stent having an improved anti-sliding function, the stent comprising an inner stent and a pair of outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, wherein each of the outer stents is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section, and the pair of outer stents are fitted on both ends of the inner stent such that the enlarged sections of the pair of outer stents face each other, and spaces of the inner stent and spaces of the bending sections of the pair of outer stents are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stents. ### Claim 2 (depends on 1) The stent of claim 1, wherein a pulling string is threaded to the spaces at an end of the inner stent exposed through the bending section of each of the outer stents. ### Claim 3 (depends on 1) The stent of claim 1, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed on the inner stent to cover the spaces of the inner stent. ### Claim 4 (depends on 1) The stent of claim 1, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on the inner stent to cover only some of the spaces of the inner stent. ### Claim 5 A stent having an improved anti-sliding function, the stent comprising an inner stent and a pair of outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, wherein each of the outer stents is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section, a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed on each of the outer stents to cover the spaces of the outer stents, and the pair of outer stents are fitted on both ends of the inner stent such that the enlarged sections of the pair of outer stents face each other, and spaces of the inner stent and spaces of the bending sections of the pair of outer stents are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stents. ### Claim 6 (depends on 5) The stent of claim 5, wherein a pulling string is threaded to the spaces at an end of the inner stent exposed through the bending section of each of the outer stents. ### Claim 7 (depends on 5) The stent of claim 5, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on each of the outer stents to cover only some of the spaces of the outer stents. ### Claim 8 A stent having an improved anti-sliding function, the stent comprising an inner stent and a pair of outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, wherein each of the outer stents is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section, a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed on the inner stent to cover the spaces of the inner stent and a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed on each of the outer stents to cover the spaces of the outer stents, and the pair of outer stents are fitted on both ends of the inner stent such that the enlarged sections of the pair of outer stents face each other, and spaces of the inner stent and spaces of the bending sections of the pair of outer stents are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stents. ### Claim 9 (depends on 8) The stent of claim 8, wherein a pulling string is threaded to the spaces at an end of the inner stent exposed through the bending section of each of the outer stents. ### Claim 10 (depends on 8) The stent of claim 8, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on the inner stent to cover only some of the spaces of the inner stent and a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on each of the outer stents to cover only some of the spaces of the outer stents. ### Claim 11 (depends on 8) The stent of claim 8, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on each of the outer stents to cover only some of the spaces of the outer stents. ### Claim 12 (depends on 8) The stent of claim 8, wherein a membrane made of silicon or Polytetrafluoroethylene (PTFE) is disposed at a predetermined portion or positions with predetermined gaps on the inner stent to cover only some of the spaces of the inner stent.