The present invention is directed to bistable cells and their use in devices, particularly medical devices such as stents, clamps and valves. An expandable stent formed of a plurality of bistable cells is described. The stent has two or more stable configurations, including a first stable configuration...http://www.google.com/patents/US20040193247?utm_source=gb-gplus-sharePatent US20040193247 - Expandable device having bistable spring construction
