LIFTKAR PT -- The Mobility Project

This attendant-operated stair climber works on angled, straight and curved stairs of many types (wood, metal, concrete or carpeted).
Attaches to a manual wheelchair and is compatible with most standard, transport, sport or pediatric models.
Disassemble into three parts that can be easily stored in a car; the heaviest piece is 41 lbs.
These stair climbers are battery operated, feature three climbing speeds, and have brake wheels that automatically lock upon reaching the step edge.