The invention is an instrument for cleaning and/or shaping and/or widening a channel that exists in or through a solid object. The design of the instrument the superelastic and shape memory properties of the material from which it is made, allow the inner volume enclosed by the instrument, its outer...http://www.google.es/patents/US7833017?utm_source=gb-gplus-sharePatente US7833017 - Self adjusting instrument
