The 2013 winner is Titan Arm.
The team have received £30,000 and a further £10,000 will be given to the University of Pennsylvania Engineering department.
You can view the 2013 winner and two runners-up here.
Visit the James Dyson Foundation to find out about next year's competition.
Keep up to date by following the James Dyson Foundation on Facebook or Twitter
"Titan Arm is obviously an ingenious design, but the team’s use of modern, rapid – and relatively inexpensive – manufacturing techniques makes the project even more compelling."