| 主权项 |
1. A machine for treating a surface lying in an XY-plane comprising,
a body including a body plate having one or more body-plate pockets for receiving ball bearings, a drive assembly including a motor and a transmission, a cleaning plate assembly connected to the transmission to be driven in an oscillating pattern parallel to the XY-plane and relative to the body plate, the cleaning plate assembly having one or more cleaning-plate pockets aligned with the body-plate pockets, one or more ball bearings positioned between the body plate and the cleaning plate for separating the body plate and the cleaning plate whereby the ball bearings roll in the pockets during movement of the cleaning plate in the oscillating pattern. |
