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Over the kneecap is a protective layer that allows a strap to pull over it, enhancing the quadriceps muscle contraction, pushing the leg out.
The small motors sit on the strap itself, causing the strap to become a sort of external artificial muscle.
The contraction starts when you start pushing
your leg out. and stops at a given maximum. This can easily be adjusted by changing the length of the strap.
One of many
Google is your friend [a1, Feb 19 2023]
||Yes please! Save my knees by adding a secondary support
||[a1] that link is interesting: there are no photos of anyone actually wearing/using the completed device. Maybe they ran out of funds?
||That was one link of many I found on powered assists. Which is not to say pashutes concept of motor in the strap has been done, just that theres been some work on the overall concept.