| 摘要 |
<p>The invention relates to an overhead door closer. For reducing the width of the overhead door closer including the casing, it is proposed that the overhead door closer has two compression springs, which are disposed one inside the other, that the spring supporting member and the damping piston have an anti-rotation means in relation to the cam disc and in that the housing wall has a reduced cross-section on both sides of the longitudinal axis such that a substantially planar surface is formed on the outside.</p> |
