Patent ID: 7117703
Filing Date: 2006-10-10
Classification: A61B,A61M,D07B

Abstract:
1. A method of making a wire-stranded hollow coil body comprising a multitude of coil line elements stranded along a predetermined circular line to form a flexible linear metallic tube having a central axial hollow portion, the method comprising steps of: clamping one end of a primary forming flexible linear metallic tube by means of a rotationally active chuck, and arranging the other end of said primary forming flexible linear metallic tube to be slidable in its lengthwise direction, and clamping said other end by a fixture chuck to impart a tensile force with said primary forming flexible linear metallic tube; and actuating said rotationally active chuck to strand said primary forming flexible linear metallic tube, and concurrently or thereafter heat treating said primary forming flexible linear metallic tube to remove a residual stress upon forming said coil line elements by electrically conducting between said rotationally active chuck, and thereafter withdrawing an elongated core from said primary forming flexible linear metallic tube to provide an axial hollow portion in which said elongated core is placed.