| 摘要 |
<p>The rotational drive (10) for a part of a shuttering element has a rotationally driven element which has several engagement sections (16), and a drive element (18) which with regard to the rotational element is rotatable in a first rotational direction without contact and in a second rotational direction in engagement with the rotational element to drive it. The rotational element has a thread, preferably a female thread, and several protrusions as engagement sections. An independent claim is included for a shuttering element equipped with the proposed rotational drive.</p> |
