Patent ID: 8146297

Claim:
A device for locking/unlocking of a connecting plate to the ground or to a rim of a basin, the connecting plate being configured to be connected to a rim of a roof element, the plate being pierced by an orifice coming to face a hole made in the ground or the rim of the basin, the device for locking/unlocking interacting with the hole made in the ground or the rim of the basin and rests against the plate for the purposes of attaching the latter, CHARACTERISED IN THAT the device comprises an expandable bushing passing from a volume called a rest volume enabling its introduction into the hole to a volume called the expanded volume providing its adhesion to the walls of said hole, wherein the hole is provided with a threaded insert, CHARACTERISED BY THE FACT THAT the expandable bushing is comprised by a threaded cylinder according to the pitch and the depth defined by the insert and split in order to pass from a rest position of a diameter allowing for the sliding of the bushing in the threaded insert to an expanded position wherein the diameter corresponds to and interacts with the insert.