The Problem:
“They can put a man on the moon, but they can’t make a decent foot?” In the 1970s, prosthetic feet had terrible functionality. Still made from wood, they were only a small step up from a peg leg.
The Insight:
Function, not looks. What if we made it function like a foot, vs. trying to make it look like a foot?
The Idea:
The Flex-Foot. Van Phillips invented the “cheetah” prosthetic, designed to mirror, if not improve upon, the performance of a human foot. It was inspired by a diving board, a cheetah’s foot, and an ancient Chinese sword. The final design, the Flex-Foot, changed everything about prosthetics, how we think of them, and what an amputee can do with them.
Source: A More Beautiful Question