US Patent 7111858 Retractable step system

A retractable step system for providing access to and from an elevated platform of a vehicle. The retractable step system is configured to move between a use position and a stowed position. The retractable step system comprises a pair of longitudinal rails which are extended when the system is in the use position and collapsed when the system is in the stowed position. The system further comprises an auxiliary platform assembly rotatably coupled near the platform, and a step structure coupled to the longitudinal rails for providing a user with an intermediate surface upon which to step.