Patent ID: 8397644

Claim:
Storage and retrieval machine comprising a chassis for supporting a mast, comprising a carriage including guide elements, at least one moveable drive element assigned to the carriage and a drive motor, which drive motor is positioned on the carriage, is in driving engagement with the at least one moveable drive element and moves the carriage by means of the at least one moveable drive element, and at least one rail assigned to the carriage, the at least one moveable drive element being positioned next to the at least one rail, wherein an area directly above the at least one rail is free of guide elements so that the area directly above the top outer surface of the rail is kept free along its complete length and does not serve as guide area for guide elements but as resting surface for the at least one moveable drive element, and that the at least one moveable drive element is guided centrically and directly above the rail, and that the guide elements bearing vertical loads are essentially guided below the upper edge of the at least one rail.