| 摘要 |
A brush-beater roller for a vacuum cleaner in which the roller is elongated and is helically twisted about its longitudinal axis, said roller having elongated dovetail slots for accommodating a brush bristle holder, and a beater bar. The dovetail slots are arranged to receive radial projections on the integral belt pulley which correspond in shape to the dovetail slots. The roller further has means thereon for preventing the bristle holders from coming out of the dovetail slot upon rotation of the roller. |
