| 摘要 |
An expansion anchor (1) comprising a head (4) and a deformable tubular body (5) within which a through longitudinal seat (6) is delimited, open at least towards the head, adapted to accommodate a tightening screw (7) therein, wherein at least one longitudinal portion (10), distal from the body head, consists of a plurality of modules (M) longitudinally crossed by the screw seat (6) and adapted to be deformed in use, each one locally and in a sequential and substantially even manner with respect to one other, arranged in a sequence along a symmetry axis (A) of the body and obtained integrally with one another and with the head. The screw (7) has a head (35) and a shank (36) having, starting from a free end (37) thereof opposite to the screw head, threaded stretches (38, 39, 40) axially arranged in sequence having core diameters increasing towards the head, equal pitch and different threading profile. |
