A Reverse Motion linkage, is a simple mechanism that reverses the direction of input (see the diagram below). The fixed pivot plays a central and crucial role in the reversal of direction.

A good example of a practical application of this mechanism, is a motorised trolley with a vertical platform. The mechanism opposite, is composed of a number of reverse motion linkages, that allow the platform to lift and lower safely.

This adjustable platform makes use of a reverse motion linkage.

The arms move ‘about’ the fixed pivot points, as the platform rises and lowers.