| 摘要 |
<p>A water driven servo motor (2) is mounted on top of a shallow housing (1) incorporating reduction gearing to drive one or two rotating cleaning brushes (20, 21). These brushes have bristles (22) extending axially to form a flat cleaning brush, with the outside of the brushes protected by a flexible skirt (24). The skirt prevents water and dirt being flung out sideways so that an efficient cleaning action is obtained. The water driven servo motor requires no other source of power and the brush can be fitted to any convenient water supply. One or two brushes are mounted in each assembly.</p> |
