Patent ID: 6135688
Filing Date: 2000-10-24
Classification: F16B

Abstract:
An undercut self-cutting dowel, comprising a body (2) having a through-bore (13), load application means (3) provided in a rear portion of the body (2), and a plurality of expansion tabs (4) separated by axial slots and formed in a front portion of the body (2) opposite the rear portion, the expansion tabs (4) extending form a plastic hinge (5) to a free front end of the body (2), and the body (2) having, in a region of the plastic hinge (5), a reduced, in comparison with the rear portion, outer diameter which results in formation of an annular shoulder (6) facing in a setting direction (S) with the outer diameter again increasing toward the free front end of the body (2); an expansion member (7) held in the through-bore (13) and projecting beyond the free front end of the body (2), the expansion member (7) widening in the setting direction (S), the expansion tabs (4) expanding radially upon displacement of the body (2) over the expansion member (7); and an expansion sleeve (8) surrounding sections of the expansion tabs (4) which adjoin the plastic hinge (5), the expansion sleeve (8) being radially expandable at least in a front, in the setting direction, section thereof and having a largest outer diameter (h) which is one of smaller than and equal to a largest diameter (a) of the body (2).