AAT Alber Antriebstechnik GmbH

patented technology that rises to the occasion


The most important features of the c-max are safety, versatility and comfort. To reach this standard we developed numerous intelligent solutions to make your life easier. At the heart of the matter lies the patented climbing mechanism which virtually climbs stairs all by itself.

The c-max is available in two versions: for persons with a maximum weight of either 140 kg or 160 kg.

The c-max‘s safety brakes stop automatically on the edge of each step. Its robust climbers set down closely to the step.

To keep up with the times we developed the s-max, i.e. innovative technology born of original and creative ideas. The s-max’s thought-out safety concept includes brakes that stop automatically at the edge of each step. The intelligent technology is responsible for the particularly safe and effortless climbing process. An engine immobiliser prevents unauthorized use thus adding extra safety.
The climbing speed is individually adjustable to adapt to various climbing situations. If desired the single step mode can be turned off. The s-max is quickly and easily mounted and, due to its compact measurements, it is also suitable for particularly narrow wheelchairs – minimum seat width is 24 cm.

The mobile stair climbing aid CR23 helps you to be mobile, not only at home, but also en route. The CR23 is a stairclimber with a foldable and integrated seat. For transportation the seat can easily fold and due to the compact measure ments thereby also space-saving stored.