Patent ID: 8955919
Filing Date: 2015-02-17
Classification: E01C,E02F,E21C

Abstract:
1. An off-road excavation apparatus comprising: a chassis having a length that extends from a front end to a rear end of the chassis, the chassis also having a width oriented perpendicular to the length; a boom pivotally attached to the rear end of the chassis; a cutting component mounted to the boom; a shroud structure at least partially covering the cutting component; a source of vacuum in fluid communication with an interior of the shroud structure for drawing air containing dust from the interior of the shroud structure; an air cleaner for removing dust from the air drawn from the interior of the shroud structure by the source of vacuum; and a dust barrier that projects downwardly from the shroud structure, the dust barrier extending along at least a portion of a perimeter of the shroud structure, and the dust barrier having a construction that is pervious to debris generated by the cutting component and that provides gradually reduced restriction to inward air flow through the dust barrier as the dust barrier extends downwardly from the shroud structure.