Articulated element anchorage device having a cranked shape

In an anchorage device comprising an anchorage element adapted for penetrating into a ground under an action of driving forces, more especially percussion forces, said anchorage element comprising at least one main rigid body having at least one leading end to be driven into the ground, said at least one main rigid body including a bearing surface having a center of gravity, said driving forces being exerted substantially through a driving plane passing through said leading end and said center of gravity, and a driving or propulsion axis related to the at least one main rigid body, at least one articulated element having an articulation, said at least one articulated element being pivotally connected to said at least one main rigid body and having a limited angular movement, at least one anchorage line connected to said at least one main rigid body by a flexible connection to at least one fastening point situated between said leading end and the center of gravity of the bearing surface of the at least one main rigid body, said fastening point being disposed forwardly of the center of gravity, the improvement comprising:

• (a) a crank shape of said at least one articulated element,
• (b) location of said center of gravity between said fastening point of the at least one anchorage line and the articulation of said at least one articulated element, and
• (c) each of said fastening point and said articulation being off center in opposite directions with respect to the driving plane, said fastening point being fixed and said articulation being situated along an articulation axis perpendicular to said driving or propulsion axis in a part of the main rigid body opposite to the leading end to be driven into the ground, so that the application of a pull on said anchorage line causes the at least on articulated element to begin rocking and the anchorage element to pivot.