Vertical Wheelchair Lifts provide vertical "elevator-like" access for wheelchairs to levels that would be otherwise inaccessible without a ramp or a more expensive elevator. Wheelchair Lifts allow for a smaller footprint than a permanent wheelchair ramp and are often keyed for specialized use by wheelchair bound individuals only. Here is a compilation of vertical wheelchair lift images.
A system of cables and stacked weights that provide a counterweight to the cab and passenger load weight. It's purpose is to make lifting the load more efficient and less taxing on the lifting motor.