The present invention is directed to an ultrasonic surgical instrument including an improved outer sheath which is removable and which rotateably engages the ultrasonic waveguide to facilitate attachment of the ultrasonic instrument to a handpiece. In particular, in one embodiment of the present invention,...http://www.google.com.au/patents/US6206844?utm_source=gb-gplus-sharePatent US6206844 - Reusable ultrasonic surgical instrument with removable outer sheath
