Omnidirectional Wheels
James Kellerman
These omnidirectional wheels that I came across on this robot have apparently been around for more than 35 years. Seeing them in action is totally awesome. They allow the vehicle to move in any direction even sideways. Sideways motion is achieved by counterrotating the front and rear wheels. Check out the video of the robot below and a very cool forklift using the same technology over here.
Via Make