Patent ID: 9085857
Filing Date: 2015-07-21
Classification: E01C

Abstract:
1. An automotive milling machine apparatus for the treatment of a road surface or ground surface, comprising: a chassis including at least three ground engaging units for engaging the road surface or ground surface, the ground engaging units defining a front axis and a rear axis with reference to a direction of travel; a machine frame supported by the chassis; at least two lifting columns connected between two of the ground engaging units and the machine frame, said two of the ground engaging units being located on a common one of the axes and being transversely offset from one another with reference to the direction of travel; a working drum supported from the machine frame for working the road surface or ground surface, the working drum being adjustable to a raised position out of engagement with the road surface or ground; and a spring system operatively associated with the at least two lifting columns and selectively operable when the working drum is in the raised position.