A self-retaining hand-held surgical retractor includes a main pair of blades mounted to a pair of fulcrumed levers. The proximal ends of two longitudinally extending bars are mounted to a toggle link carried between the handles. The bars pass through arms projecting from the levers above the plane containing...http://www.google.de/patents/US5885210?utm_source=gb-gplus-sharePatent US5885210 - Surgical retractor
