The wheelchair built like a TANK: $15,000 TopChair-S uses caterpillar tracks to scale flights of stairs with ease
Engineers in Toulouse, France, have designed the TopChair-S which can reverse up 12 steps (pictured) in just two minutes and reach 6mph (10km/h) on flat surfaces.
http://www.dailymail.co.uk/sciencetech/article-3426338/The-wheelchair-built-like-TANK-11-500-TopChair-S-uses-caterpillar-tracks-scale-flights-stairs.html
Engineers in Toulouse, France, have designed the TopChair-S which can reverse up 12 steps (pictured) in just two minutes and reach 6mph (10km/h) on flat surfaces.
http://www.dailymail.co.uk/sciencetech/article-3426338/The-wheelchair-built-like-TANK-11-500-TopChair-S-uses-caterpillar-tracks-scale-flights-stairs.html