A surgical apparatus includes a body configured for insertion into a bore of a surgical handpiece and a latch that includes a resilient member connected to the body. The resilient member has a latching structure configured to latchingly engage a surface of the surgical handpiece within the bore....http://www.google.es/patents/US6090122?utm_source=gb-gplus-sharePatente US6090122 - Surgical instrument handpiece and system
