| 摘要 |
<p>A surface cleaner is preferably in the form of a windscreen wiper (11). The wiper (11) has conventional rubber blade or blades (12, 13) to squeeze off water as well as a bristle portion (14) to break up material smeared across the windscreen. If polypropylene is chosen for the bristles, the bristle portion (14) may be used continuously with the rubber blade (12, 13). Alternatively the bristles may be held off the windscreen by various expedients. The bristles may be biased away by a spring which is only overcome by a counterweight on rapid motion of the wiper (11). Toggling action of the rubber blade (12, 13) may also be utilised to hold the bristles off the windscreen on the return stroke of the wiper (11). Water may be pumped in, or led from a catcher on top of the wiper (11), to further enhance the cleaning by the bristles.</p> |
