Patent ID: 7530641

Claim:
Automotive construction machine ( 1 ) for working ground surfaces ( 2 ), with a machine frame ( 4 ), with a drive engine ( 6 ) for driving traveling devices ( 8 ) and for driving working devices, and with a milling drum ( 12 ) for milling the ground surfaces ( 2 ), which is capable of being raised and is driven by and capable of being uncoupled from the drive engine ( 6 ), where the milling drum ( 12 ) is capable of being moved into a raised position when it is not in milling mode, characterized in that, the milling drum ( 12 ) remains coupled with the drive engine ( 6 ) when in raised position and with a direction of travel in which the rotating direction of the milling drum ( 12 ) corresponds to the rotating direction of the traveling devices ( 8 ), and a monitoring device ( 14 ) monitors a distance between the milling drum ( 12 ) and the ground surface ( 2 ) and uncouples the raised milling drum ( 12 ) from the drive engine ( 6 ) and/or uncouples the traveling devices ( 8 ) from the drive engine ( 6 ) and/or raises the machine frame ( 4 ) and/or generates an alarm signal when the monitoring device ( 14 ) detects a deviation that falls below a pre-determined distance.