Construction block e.g. rubble stone, tightening and handling device, has two arms with larger return length forming handle of portage and unlocking return of smaller length extended under handle of portage

摘要

The device has two parallel arms (2,3) intended to take support against two opposite vertical faces of the block. The arms are connected to each other by an articulation. The arms respectively include a larger return length forming handle of portage (6) and an unlocking return (7) of smaller length that is extended under the handle of portage, at their upper end.