Spreading anchor

Details Spreading anchor Spreading anchor

1997-03-19

1998-06-30

Wilson, Neill R.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 51, 411 60, 411 71, F16B 1306

Patent

active

057723729

ABSTRACT:
A spreading anchor including an anchor rod (2) having a stem (12) provided at its front end, when viewed in a setting direction, with a cone (3) widening outwardly towards its free end and a longitudinally displaceable sleeve (4) pushed over the anchor rod (2) and having at a front end (8) cutting tabs (5) which are provided with cutters, are separated from each other by gaps, extend from a plastic hinge (11) toward the cone (3), and are spread radially upon sliding of the sleeve (4) over the cone (3), the sections of the cutting tabs (5), which extend from free ends thereof in a direction toward the plastic hinge (11), having an outer surface (6) remote from the cone (3) and formed at least in their cutting region thereof as a substantially toroidal surface.

REFERENCES:
patent: 4702654 (1987-10-01), Firschmann et al.
patent: 4818163 (1989-04-01), Bereiter et al.
patent: 4898505 (1990-02-01), Froehlich
patent: 4984945 (1991-01-01), Bergner

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