Patent ID: 7360289

Claim:
An apparatus for milling the surface of a low slope substrate, comprising: a milling device comprising a cylindrical tubular structure having an outer rotatable milling surface, positionable adjacent said substrate and which is drivable in a rotary motion to mill the surface of the substrate; a track positioned above said substrate along which the milling device is mounted in a position adjacent said substrate; a mounting assembly for mounting the milling device to the track, the mounting assembly including means for engaging the track and enabling movement of the assembly along the track in a milling direction, the milling device supported in rotatable engagement from the mounting assembly such that the milling surface engages the substrate for milling thereof, the mounting assembly including adjustment means for adjusting the angle and depth of the outer milling surface relative to the substrate to allow for variation in the depth and angle to be milled on the substrate; wherein the mounting assembly includes an upper mounting assembly which includes said means for engaging said track, said mounting assembly further including a lower frame upon which said milling device is rotatably mounted, said lower frame being connected to the upper mounting assembly by at least two vertically adjustable legs and wherein said vertically adjustable legs are extended and retracted by electronic control means operatively connected to each leg, thereby allowing adjustment of the depth and angle of the milling device against the substrate for milling.