Waag Society Fablab Amsterdam

First idea was a ramp like structure, mounted to the side of the char. Using a robotic arm, a plateau could be lowered in front of the wheel, making a ramp on to the obstacle. After the wheelchair has passed the obstacle the arm would retract the plateau so it could be used again on a next obstacle.

 
pro's:

• universal plateau that allows the chair to go over bumps as well cross gaps
• can be stored above the front wheel
• adjustable angle for different heights of obstacles.

cons:

• fragile arm. When hit it could bent, leaving the device and chair unusable
• the device will increase the total width of the chair.
• complex movement of arm and ramp