Patent ID: 6588810
Filing Date: 2003-07-08
Classification: E02D,Y10S,Y10T

Abstract:
A closing device with selective locking for closing a frame comprising a substantially flat lid or rigid manhole cover selectively applied to the frame, a lock connected with the lid, and a key which has a socket and an arm, one end of the arm carrying the socket, the lid having an upper wall and an opening for access to the lock for the key, the lock having a latch which cooperates with a catch on the frame, and the key selectively assuming, with respect to the opening, a locking position in which the key can leave freely and in which the latch is trapped by the catch, and an unlocking position in which the key is trapped in the opening and in which the latch is disengaged from the catch, wherein the arm has an axis and the socket has an axis substantially perpendicular to the axis of the arm so that the socket can engage into a hole for access to said latch, provided in the lid under its upper wall, the hole having an axis parallel to the upper wall such that the socket is inserted into the hole along the axis of the hole, and the arm is substantially perpendicular to the lid when the key is in the unlocking position and the key has a handle connected to the other end of the arm and substantially perpendicular to the arm to allow an operator to lift the lid when in its unlocked position and to lower the lid to its closed position.