Patent ID: 6974472
Filing Date: 2005-12-13
Classification: A61F,Y10S

Abstract:
1. A self-expandable stent using shape memory alloy, comprising: a first cylindrical stent member comprised of a first wire formed of super elastic shape memory alloy, said first wire being bent a large number of times while being extended upwardly and downwardly a large number of times, so said first wire forms a plurality of variable rhombic spaces by forming a plurality of intersections for causing said first wire to be intersected with itself to resist longitudinal constriction of said first cylindrical stent member and a plurality of interlocked points for causing said first wire to be interlocked with itself at spaced positions to allow longitudinal constriction of said first cylindrical stent member; and a second cylindrical stent member comprised of a second wire formed of super elastic shape memory alloy, said second wire being diagonally extended in parallel with the previously positioned first wire and passed alternately under and over the first wire so as to divide each of a plurality of rhombic spaces formed in the first cylindrical stent member into four equal parts, thereby preventing said first and second cylindrical stent members from being separated from each other.