| 摘要 |
In order to enable disabled wheel-chair drivers to overcome stairs without any help from outside even with a wheel-chair which can be transported in a car, the foldable wheel-chair can be equipped with a removable device for climbing stairs. In order to increase the safety the wheel-chair chassis is adapted to suit the drive over the stairs by means of rear wheels which can be folded up in such a way that the centre of gravity with the driver is as close as possible to the stairs. The suitable climbing devices with a divided-up tracklaying gear or linearly guided, rigid legs with rollers or articulated legs are preferably driven electrically, controlled electronically and fed by a lightweight battery.
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