Artificial foot recycles energy ...as a silicon gun!!

Probably the engineers from the University of Michigan weren't thinking about this when they came with the idea of storage energy through the same kind of mechanical device that makes the silicon gun works (looj at the hhel clutch in the upper picture), but the design analogy it's perfect. This hight-tech electromechanical prosthetic feet works (in the mechanical part) with the same basic principle that a silicon gun, a clever solution for a very complex problem and a really good sample of analogous thinking in the design process.

for the complete article with all the explanation follow this

for a video of the device working folow this

and for the paper who explain... everything follow this