Patent ID: 7905435
Filing Date: 2011-03-15
Classification: B02C

Abstract:
1. A roof grinder operative to both comminute and transport rubber, asphalt, insulation and rock material during building renovation which saves manual labor and provides for compact waste disposal, comprising, in combination: a cutter which comminutes commercial roofing material and has a rotating drum carrying a plurality of teeth protruding therefrom; and further has a fixed blade having a non-linear cutting edge with a first cutting surface between at least two of said plurality of teeth and a second cutting surface more distal from said rotating drum than said at least two of said plurality of teeth; an air transport having a high velocity air stream receiving said comminuted roofing material and transporting said comminuted roofing material within said high velocity air stream; and a rotary air lock coupled to said cutter for receiving said comminuted roofing material and coupled to said air transport to deliver said received comminuted roofing material thereto while preventing said high velocity air stream from passing through said cutter.