Stent and Method for Manufacturing the Same

• US 20080167709A1
• Filed: 07/07/2006
• Published: 07/10/2008
• Est. Priority Date: 07/15/2005
• Status: Abandoned Application

• Current Assignee: Standard Sci-Tech Incorporated
• Original Assignee: Standard Sci-Tech Incorporated
• Inventors: An, Sung-Soon
• Application Number:
  US11/914,490
• Publication Number:
  US 20080167709A1
• Time in Patent Office: Days
• US Class Current: 623/1.22
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

A method of manufacturing a stent includes forming a first cylindrical mesh structure by bending a first member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame and forming a second cylindrical mesh structure by bending a second member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame, wherein a bending track the second member crosses a bending track of the first member.

Claims

1. A method of manufacturing a stent, comprising:

forming a first cylindrical mesh structure by bending a first member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame; and

forming a second cylindrical mesh structure by bending a second member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame, wherein a bending track the second member crosses a bending track of the first member.

2. The method of claim 1, further comprising, after the first cylindrical mesh structure is formed, forming a first strut formed of a spirally twisted strut that is formed at a point where a distal end of the first member meets a proximal end of the first member.

3. The method of claim 1, further comprising, after the second cylindrical mesh structure is formed, forming a second strut formed of a spirally twisted strut that is formed at a point where a distal end of the second member meets a proximal end of the second member.

4. The method of claim 1, wherein the peaks and valleys of different turns of the first member are crossed and interlocked each other when the peaks and valleys of the different turns of the first member meet each other during the first cylindrical mesh structure is formed.

5. The method of claim 1, wherein the peaks and valleys of different turns of the second member are crossed and interlocked each other when the peaks and valleys of different turns of the second member meet each other during the second cylindrical mesh structure is formed.

6. A method of manufacturing a stent, comprising:

providing a plurality of pins on a cylindrical surface of a cylindrical manufacturing frame and setting one of a plurality of pins as a starting point;

winding a first member around the cylindrical manufacturing frame from the starting point to an end of the cylindrical manufacturing frame while being bent in a zigzag-shape to form peaks and valley with reference to the pins and having a plurality of turns;

winding the first member around the cylindrical manufacturing frame from the end of the cylindrical manufacturing frame to the starting point while being bent in a zigzag-shape to form peaks and valley with reference to the pins and having a plurality of turns, the peaks and valley are crossed and interlocked each other when the peaks and valleys meet each other;

forming a strut by spirally twisting a distal end portion of the first member and a proximal end portion of the first member after the peaks and valleys of the first member are formed;

winding a second member around the cylindrical manufacturing frame from a starting point to an end of the cylindrical manufacturing frame while being bent in a zigzag-shape to form peaks and valley with reference to the pins and having a plurality of turns, wherein the starting point of the second member is disposed on a symmetrically opposite location of the starting point of the first member on the surface of the cylindrical manufacturing frame;

winding the second member around the cylindrical manufacturing frame from the end of the cylindrical manufacturing frame to the starting point while being bent in a zigzag-shape to form peaks and valley with reference to the pins and having a plurality of turns, the peaks and valley are crossed and interlocked each other when the peaks and valleys meet each other; and

forming a strut by spirally twisting a distal end portion of the second member and a proximal end portion of the first member after the peaks and valleys of the first member are formed.

7. A stent comprising:

a first cylindrical mesh structure formed by bending a first member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame; and

a second cylindrical mesh structure formed by bending a second member in a zigzag-shape having peaks and valleys and a plurality of turns wound around an outer circumference of a manufacturing frame, wherein a bending track the second member crosses a bending track of the first member,

wherein the first cylindrical mesh structure includes a first strut formed of a spirally twisted strut that is formed at a point where a distal end of the first member meets a proximal end of the first member; and

the second cylindrical mesh structure includes a second strut formed of a spirally twisted strut that is formed at a point where a distal end of the second member meets a proximal end of the second member.

8. The stent of claim 7, wherein the peaks and valleys of the first and second members are crossed and interlocked each other as a hook shape when they meet each other.