A method for generating power from an exerted energy associated with muscles acting across a joint is provided. The method including: absorbing energy during one or more periods of a periodic motion of the joint in which energy is absorbed by the muscles; and at least partially returning the absorbed...http://www.google.com.hk/patents/US7645246?utm_source=gb-gplus-share專利 US7645246 - Method for generating power across a joint of the body during a locomotion cycle