Merck sharp amp; dohme chaussee secured of a lock of a cover on a frame

摘要

The present invention relates to a manhole, to lock a secure a cover on a frame. According to the invention, the manhole (1) is characterized in that the cover (3) includes a through orifice (30) in which can be mounted a shaft (34) to pivot, controlled by a key and carrying in the buffer a bolt (35) which can occupy, under the action of the key, a blocking position of the arm (14) of the lock (12) to its locking position of the cover (3) to the frame (2) or an unlocking position of locking arm (14) allowing the operation of the other arm (16) of the lock (12) in order to bring locking arm (14) to its unlocking position of the cover (3) of the frame (2). The present invention finds application in the roadway equipment.