| 摘要 |
<p>The invention relates to a compressed-air driven device for opening and closing valves or similar, by using for this purpose a device (1), to be connected to the valve and creating a rotating motion, in which there is a rotated drive wheel (14) with several retracting pins (15). The pins (15) are arranged in collar-like components (13), into which they can retract when they strike an obstacle.</p> |
