Medical guidewire and welding process

Details Medical guidewire and welding process Medical guidewire and welding process

1993-12-27

1996-02-06

Rimell, Sam

Surgery

Truss

Pad

128657, A61B 500

Patent

active

054889596

ABSTRACT:
A process is provided which is particularly suitable for manufacturing medical guidewires. The resulting products have a weld that has good pull strength and is of minimum brittleness even when one of the components being welded together is a fine wire of material that is susceptible to damage and severe deterioration when subjected to harsh heating conditions. The invention is particularly suitable when that material is a Nitinol alloy. The process supports the other component to be welded such as a coil within a collet such that a substantial portion of it projects beyond the collet and is not supported thereby. A heat source renders this projecting portion molten, after which the other component made of Nitinol, for example, is embedded into the molten mass, usually still under the influence of the heat source, to thereby effect a joining which, after cooling, provides the improved weld without imparting brittleness to either component.

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Shape Memory and Super-elasticity Effects in NiTi Alloys.

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