The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2012
Filed:
Sep. 22, 2009
Thomas Kramer, Köln, DE;
Christian Berning, Zulpich, DE;
Peter Busley, Linz/Rhein, DE;
Wirtgen GmbH, , DE;
Abstract
The invention relates to a road-milling machine which has a ladderto allow the driver's positionof the civil engineering machine to be climbed to easily. The ladder is mounted on oneB of the two longitudinal sides of the frameof the machine to be pivotable about an axis of pivotextending 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.