Patent ID: 6416519
Filing Date: 2002-07-09
Classification: A61B

Abstract:
An extraction device comprising:a sheath having an interior passage; distal legs that project from the passage of the sheath, each of the distal legs having a parabolic curved shape, having a concave transverse cross-section, and being elastically deformable, the concave transverse cross-section of the distal legs being defined by each of the distal legs having an inward surface that is concave, and an outward surface that is convex; and actuating means for retracting the distal legs into the sheath, by which the distal legs are elastically deformed to retract into the sheath, and deploying the distal legs from the sheath, by which the distal legs elastically reacquire their parabolic curved shapes; wherein as a result of their parabolic curved shapes and their elastic deformability, the distal legs automatically deploy radially outward and away from each other when deployed outside the sheath with the actuating means, the extraction device lacking a second component to engage and force the distal legs away from each other.