Road milling machine

US8186763B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

• Thomas Kramer · Herford, DE
• Christian Berning · Euskirchen, DE
• Peter Busley · Linz, DE

Key dates

• Filing date: Sep 22, 2009
• Grant date: May 29, 2012
• Expiry date: Aug 27, 2030

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E01C2301/30
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

The invention relates to a road-milling machine which has a ladder 11 to allow the driver's position 7 of the civil engineering machine to be climbed to easily. The ladder is mounted on one 1B of the two longitudinal sides of the frame 1 of the machine to be pivotable about an axis of pivot 27 extending substantially at right angles to the direction of travel. The ladder can thus be folded upwards to widen the working range of the machine. However, should the ladder not be in a state where it is folded upwards while the machine is being used to do work, the ladder cannot be damaged against obstacles which suddenly make an appearance in the working range. Should the ladder hit against an obstacle, the ladder is able to move out of the way of the obstacle by pivoting out of the vertical position in the opposite direction to the direction of travel. A further advantage of the ladder lies in the fact that the ladder can easily be folded upwards or downwards not only from the ground but also from the driver's position.