US Patent 6840526 Bumper step

A step assembly is provided having a step frame mounted for movement relative to a mounting surface between a deployed position and a stored position (or between a stored position and a deployed position), and at least one boss, the boss having a notch for holding the step frame in the deployed position. The step frame preferably has at least two legs oriented parallel to each other, and horizontally spaced from one another, each of the legs defining an upper end and a lower end, an axle connected at the upper end of the at least two legs, and a step member connected between the at least two legs proximate to the lower ends thereof.