| 摘要 |
A retractable entry system is provided which is powered to extend and retract along a plurality of spaced-apart rotatable axes, in sequential, reciprocating arcs of motion. With the first axis and in the first of the sequences of motion when retracting, a portion of the step assembly folds onto another portion of the step assembly, the steps being aligned tread to tread. With the second axis and in the second of the sequences of motion in retraction, the folded step assembly rotates from a horizontal to a vertical orientation against and into the supporting vehicle. The completed sequences of motion allow the retracted entry systems to fit between the outer side wall of a vehicle and the vehicle chassis. |
| 主权项 |
1. A entry system for facilitating access to a opening, comprising:
a plurality of steps, means for retaining those steps in a fixed relation to each other when the steps are to be used, means for moving those steps to a compacted relation to each other when the steps are not to be used, so as to reduce at least a given dimension of the entry system, and means for reorientating the entry system such that the given dimension of the entry system can be positioned with respect to the opening with a more convenient spacial storage need. |
