An improved expandable removal element (16) for an atherectomy device wherein the expandable removal element (16) is movable between an expanded position and a contracted position. In one embodiment of the present invention, a single drive shaft (92) is operatively connected to the distal...http://www.google.de/patents/US5836868?utm_source=gb-gplus-sharePatent US5836868 - Expandable intravascular occlusion material removal devices and methods of use 
