UpCart Helps You Haul Heavy Objects Up and Down Stairs
The UpCart is a trolley/cart that helps you haul large objects up and down stairs. The trolley is made up of 3 wheels that rotate when they hit a stair. On flat ground, the cart rides on two wheels with the third wheel sitting right above them, and once they run into a stair, they rotate around so that the wheel on the top is now the front wheel on the bottom, and then rinse and repeat for each stair you come across.
