Patent ID: 7704128
Filing Date: 2010-04-27
Classification: B08B,E02F

Abstract:
1. An apparatus comprising: a cutter head assembly including a housing having a cutting bar disposed at a forward end thereof, the cutting bar having a transversely mounted center shaft provided with a plurality of spaced apart cutting teeth disposed across a lateral extent of the center shaft; an arcuate shroud carried within the housing adjacent the cutting bar for controlling a flow of material being cut by the cutting teeth; a restrictor plate hingedly secured to the shroud within the housing such that edges of the restrictor plate are closely spaced from inside walls of the housing, the restrictor plate forming a throat within the housing such that a cross-sectional area is formed through which material from the cutting bar is moved; and a vacuum assembly operable with the housing proximate the throat for removing the material therefrom, wherein the housing includes an aperture extending through an upper portion of the housing for providing a venting thereto, the housing further comprising a door pivotally mounted proximate the aperture and moveable thereacross for adjusting the venting of air with the housing, wherein the venting controls an amount of air flow entering the housing and affecting the vacuum assembly in removing the material.