The landmark in machine development, particulary in loading and earth moving machines was the introduction of an articulated chassis. It considerably increased their manoeuvrability and turning abilities and improved other performance parameters in relation to the machines was steered wheels. The idea of an articulated vehicle dates back to as early as 19th century. Later years brought about the solutions of articulated vehicles suggested by a number of firms. For many years, however, the designers did not utilize this way of steering. The effective application of articulated machines was accelerated only by the development of drive systems, particularly of hydraulic ones.