Expansion anchor with tabs having a changing curvature radius

Details Expansion anchor with tabs having a changing curvature radius Expansion anchor with tabs having a changing curvature radius

1998-02-25

2000-02-22

Saether, Flemming

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

Having separate expander means

Including sleeve and distinct tapered expander

411 601, 411 603, F16B 1306

Patent

active

060272929

ABSTRACT:
An expansion anchor including an anchor rod (1) having a head (2) widening in an insertion direction S; and a sleeve (3) having a plurality of expansion tabs (6) separated from each other by slots (5) and extending from a plastic hinge (4) toward a free front end (7) of the sleeve (3), the expansion tabs (6) expanding radially upon relative displacement of the sleeve (3) and the anchor rod (2) and having each at least one groove-like depression (8 or 9) which opens in a region of the free front end (7) and extends at least along a portion of an axial length (1) of an expansion tab (6), with the groove-like depression (8 or 9) being inclined toward a straight line (G) extending parallel to a sleeve axis (A).

REFERENCES:
patent: 3107570 (1963-10-01), Zifferer
patent: 3922947 (1975-12-01), Leonardo
patent: 4474516 (1984-10-01), Schiefer
patent: 4518290 (1985-05-01), Frichmann
patent: 4968200 (1990-11-01), Mark
patent: 5137395 (1992-08-01), McCartney
patent: 5441372 (1995-08-01), Wilkinson

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