Undercut self-cutting spreading anchor

Details Undercut self-cutting spreading anchor Undercut self-cutting spreading anchor

1998-12-09

2000-06-13

Saether, Flemming

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

Having separate expander means

Including sleeve and distinct tapered expander

411 30, F16B 1306

Patent

active

060741457

ABSTRACT:
An undercut self-cutting spreading anchor with an anchor rod (5) provided, at one of its ends with a load application element and at another, opposite of its ends, with a head portion (7) a diameter of which increases toward a free end (6) of the anchor rod (5), with the head portion (7) having a substantially crowned shape, a largest diameter region (9), and at least two sections (11, 13) which adjoin the largest diameter region (9) and diameters of which diminish toward the free end (6) of the anchor rod (5), the adjoining section (11, 13) having annular surfaces (12, 13) mean inclination angles of which toward an axis (A) of anchor rod (5) increases in a setting direction (S); and a sleeve (2) displaceable axially along the anchor rod (5) and having a plurality of expansion tabs (3) separated by longitudinal slots and which expand radially upon sliding over the head portion (7) of the anchor rod (5).

REFERENCES:
patent: 3479072 (1969-11-01), Kosar
patent: 3906832 (1975-09-01), Lunn
patent: 4702654 (1987-10-01), Frischmann
patent: 5332346 (1994-07-01), Shinjo
patent: 5807049 (1998-09-01), Beck

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