A ferrule for a laparoscopic surgical instrument is enclosed. The ferrule is an integral plastic piece which shields a peripheral uncovered portion of a metal tube of the surgical instrument which is intermediate a shrink wrap covered portion of the metal tube and an actuator housing which closely surrounds...http://www.google.se/patents/US5275612?utm_source=gb-gplus-sharePatent US5275612 - Insulating ferrule for disposable laparoscopic surgical instrument
