A surgical punching instrument with a fixed handle (21) is attached to a tubular guide part (20). An actuating lever (23) is mounted on the fixed handle (21) in a pivotingly movable manner and is in connection with a plunger (27) via a short lever arm (24). This plunger is in turn connected to a punching...http://www.google.co.uk/patents/US7621932?utm_source=gb-gplus-sharePatent US7621932 - Surgical punching instrument
