| 主权项 |
1. An apparatus for abrading a surface, the apparatus comprising:
a machine chassis comprising an upper chassis plate and a corresponding lower chassis plate, the upper and lower chassis plates having a common outer perimeter; a plurality of aligned openings through the upper and lower chassis plates, the openings forming an array; a motor attached above the machine chassis; a variable frequency drive attached to the motor; sealing means for preventing entry of fluid into the motor; a plurality of tool plate assemblies, each assembly comprising an input shaft extending through a pulley and an opening in the chassis plates to a tool holder connected to the input shaft below the lower chassis plate, a tool plate connectable to the tool holder, and a plurality of tool segments connectable by tool segment attachment means to the lower side of the tool plate, each tool segment having abrasion means on its lower surface and attachment means on its upper surface; a pair of idler pulleys, each pulley positioned between the upper and lower chassis plates in alignment with a corresponding idler opening passing through the upper and lower chassis plates; a drive belt wound adjacent each of the pulleys and idler pulleys; a framework attached to the machine chassis and surrounding the motor; at least one pair of wheels attached to the framework; at least one weight post extending from the framework; an elongated handle extending from the apparatus; control means for controlling the motor; and a pair of vacuum venturi disposed on opposing first and second sides of the chassis. |
