Patent ID: 7883153

Claim:
A road milling drum assembly for use with a road milling machine in a roadway milling operation generating debris, the road milling drum assembly comprising: a cylindrical core portion carrying a first road planing bit assembly, and the cylindrical core portion detachably connecting to the road milling machine; the first road planing bit assembly having a first milling width wherein the first milling width is a minimum milling width of the road milling drum assembly; and a selected one of the following components: a protective cover detachably connecting to the cylindrical core portion and the road milling machine, whereby the road milling drum assembly comprising the cylindrical core portion and the protective cover, and the milling width of the road milling drum assembly being equal to the first milling width; or a first milling extension segment carrying a second road planing bit assembly, the first milling extension segment detachably connecting to the cylindrical core portion and the road milling machine, and the second road planing bit assembly having a second milling width, whereby the road milling drum assembly comprising the cylindrical core portion and the first milling extension segment, and the milling width of the road milling drum assembly being equal to the sum of the first milling width and the second milling width wherein the sum of the first milling width and the second milling is a maximum milling width of the road milling drum assembly; or a second milling extension segment carrying a third road planing bit assembly, the second milling extension segment detachably connecting to the cylindrical core portion and the road milling machine, and the third road planing bit assembly having a third milling width, whereby the road milling drum comprising the cylindrical core portion and the second milling extension segment, and the milling width of the road milling drum assembly being equal to the sum of the first milling width and the third milling width wherein the sum of the first milling width and the third milling width is an intermediate milling width of the road milling drum assembly wherein the intermediate milling width is greater than the minimum milling width and less than the maximum milling width; and wherein the cylindrical core portion containing a bore; when the selected component being the protective cover, the protective cover having a dowel, and the bore receiving the dowel; when the selected component being the first milling extension segment, the first milling extension segment having a dowel, and the bore receiving the dowel; when the selected component being the second milling extension segment, the second milling extension segment having a dowel, and the bore receiving the dowel.