Undercut self-cutting dowel

Details Undercut self-cutting dowel Undercut self-cutting dowel

1999-10-14

2000-10-24

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

With hole forming means

411 541, 411 603, F16B 1304, F16B 1306

Patent

active

061356883

ABSTRACT:
An undercut self-cutting dowel including a body (2) having a through-bore (13), a load application element (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, with the expansion tabs (4) extending from a plastic hinge (5) to a free front end of the body (2), and with 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); and an expansion sleeve (8) surrounding sections of the expansion tabs (4) which adjoin the plastic hinge (5) and radially expandable at least in its front, in the setting direction, section, with a largest outer diameter (h) of the sleeve (8) being smaller than or equal to a largest diameter (a) of the body (2).

REFERENCES:
patent: 4984945 (1991-01-01), Bergner
patent: 5609453 (1997-03-01), Fischer
patent: 5772372 (1998-06-01), Lins et al.
patent: 5988964 (1999-11-01), Lins et al.
patent: 6012887 (2000-01-01), Kaibach et al.

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