Patent ID: 6402425
Filing Date: 2002-06-11
Classification: E01C,E04F

Abstract:
A screed, comprising:first and second end plates; a strike tube rotatably coupled to the first and second end plates and extending substantially therebetween; a drive tube rotatably coupled to the first and second end plates and extending substantially therebetween, the drive tube including a first drive cylinder, a spacer tube, and a second drive cylinder, a shaft for driving the first drive cylinder extending through and pivotally secured to the second drive cylinder; a first motor coupled to the first drive cylinder to drive the first drive cylinder; a second motor coupled to the strike tube to drive the strike tube; and, a third motor coupled to the second drive cylinder to drive the second drive cylinder; wherein the first drive cylinder is rotatably coupled to the second drive cylinder, such that the first drive cylinder and the second drive cylinder may be independently operated to control movement of the screed and to maintain the screed relative to a desired path.