Patent ID: 8246270

Claim:
A self-propelling road milling machine, comprising: a machine frame; at least two front ground engaging supports, and at least one rear ground engaging support, with reference to a direction of travel; front and rear lifting columns supporting the frame from the ground engaging supports; a milling roller supported from the frame for treatment of a ground surface; first and second height adjustable side plates arranged on opposite sides of the milling roller; a height adjustable stripping plate arranged behind the milling roller and operable to be lowered, during operation, into a milling track generated by the milling roller; a first ground engaging sensor including a first measuring device, the first ground engaging sensor configured to engage the ground surface to be treated and to measure a distance of the frame from the ground surface engaged by the first ground engaging sensor; a second ground engaging sensor including a second measuring device and the stripping plate, the second ground engaging sensor configured such that the stripping plate engages the milling track and such that the second measuring device measures a distance from the frame to the milling track engaged by the stripping plate; and a controller operably associated with the first and second measuring devices, the controller being configured to determine a milling depth of the milling roller from measurements obtained from the first and second measuring devices.