Patent ID: 7316405
Filing Date: 2008-01-08
Classification: A61G,B62B

Abstract:
1. An apparatus for climbing and descending stairs or other obstacles, said apparatus comprising: a first section including a first section frame and a pair of first pulleys disposed on opposite sides of said first section frame; a second section including a second section frame and a pair of second pulleys disposed on opposite sides of said second section frame; a third section flexibly connected between said first section and said second section and including a third section frame, a mounting platform for coupling a carrier device, a pair of motors disposed within said third section frame, a pair of first pinions disposed on opposite sides of said third section frame wherein each said first pinion is connected to and driven by one of said motors, and a pair of second pinions disposed on opposite sides of said third section frame; and a pair of crawler belt systems disposed on opposite sides of said apparatus, each of said opposite sides of said apparatus including a first crawler belt engaging said first pulley and said first pinion, a second crawler belt engaging said second pulley and said second pinion, and a third crawler belt engaging said first pinion and said second pinion, and wherein one of said motors drives said first pinion causing movement of said first and third crawler belts engaging said first pinion and thereby causing movement of said second crawler belt engaging said second pinion that is driven by said third crawler belt.