generalelectric:

In the 1960s, GE set out to create a mechanical exoskeleton that could give the average person super strength. Called Hardiman, the project was funded by the U.S. military and was developed to allow users to easily lift up to 1,500 pounds. Unfortunately, the suit itself weighed 1,500 pounds and ultimately Hardiman’s size, weight, lack of stability and power-supply issues prevented it from ever leaving the laboratory. 

Shown here is one of the arms developed for Hardiman. Image via Cybernetic Zoo