A surgical instrument for laparoscopic surgery 21 including a handle having a body with a ratchet formed thereon. The handle including a trigger arm pivotally mounted on the body and adapted to operate a tool. The handle further includes a locking mechanism having a pawl moveably mounted on the trigger...http://www.google.de/patents/US5868784?utm_source=gb-gplus-sharePatent US5868784 - Surgical instrument and ratchet controlled handle therefore
