| 摘要 |
<p>A wand (10) for cleaning a carpeted stair tread includes a vacuum tube (12) and a plurality of partitions (18, 20, 22, 24) attached thereto. The vacuum tube (12) and the partitions (18, 20, 22, 24) cooperate to define a central channel (38) and a pair of generally enclosed lateral channels (40, 42). A nozzle bar (46) for dispensing a liquid cleaning material extends through the central channel (38). The lateral channels (40, 42) extend in side-by-side relationship with the central channel (38). Each lateral channel (40, 42) is open along the bottom edge thereof to define a vacuum slot. Each of the lateral channels (40, 42) communicates with the vacuum tube through a respective opening (15A, 15B) formed in the vacuum tube (12). The wand (10) may also include an elongated operating handle (14H). Preferably the handle (14H) is attached to the wand (10) such that the axis of the handle is substantially parallel to the axis of the wand. The wand (10) may further include a nose piece (60) having a central channel (76) and a pair of generally enclosed lateral channels (78, 80) that extend side-by-side relationship with the central channel (76). The nose piece (60) is mounted for slidable movement with respect to the wand (10) to bring the corresponding lateral channels in the nose piece and in the wand into adjustable degrees of overlapping fluid communication.</p> |
