An expansion mechanism that includes an elongate instrument and a plurality of struts arranged around the elongate instrument provides radial expansion of a medical device. Each strut has a first end pivotally connected to the elongate instrument and a second strut that expands radially outward. Each...http://www.google.com/patents/US6500191?utm_source=gb-gplus-sharePatent US6500191 - Compliant framework and methods of use
