| 摘要 |
The suction tool comprises suction cup (1) , a handgrip part and ejector unit (10) with three air channels (12, 13, 14). The handgrip part has the form of a closed stirrup composed of an upper piece (5), a lower piece (6) together with front and rear side pieces (7, 8). An outlet channel (13) is provided for compressed air through the front side piece and opens in a mouth (17) at the upper piece front end. As long as the mouth is open and allows free passage of compressed air through the first and second channels, the ejector unit maintains a vacuum in the suction cup via the third channel. When the mouth is closed, e.g. by means of a finger, the compressed air flow is changed over from the second channel to the third channel, whereby the vacuum in the suction cup is replaced by an excess pressure. |
