| 摘要 |
<p>Locking device for a manhole, equipped with a hinge device (3) removably connecting a cover (2), equipped with at least one projecting pivot (8), to a frame (1), the skirt (4) of which is provided with at least one receptacle (7) cooperating with the projecting pivot (8), in which an elastic member (13), for example a spring or a piece of elastomer, which has to be compressed and then released in order to lock the cover, is fastened in each receptacle (7) and exerts a resistance to the unlocking of the cover. <IMAGE></p> |
