Undercut Anchor
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United States of America Patent
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Issued Date -
Nov 20, 2008
app pub date -
Jun 14, 2005
filing date -
Sep 18, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to an undercut anchor (10) comprising an anchor shaft (12) and a non-circular, for example triangular, anchor head (16). Said undercut anchor (10) is to be anchored in a borehole which is produced by ultrasound boring, has a cross-section matching that of the anchor head (16), and an undercut at the bottom thereof, that engages at the rear of the anchor head (16) following a rotation of 60.degree.. A rotation-preventing element (18) is used to ensure that the anchor is rotationally fixed, said element having a cross-section matching the anchor head (16), and a recess (22) arranged on a front side thereof facing the anchor head (16) and corresponding thereto (16). When the anchor head (16) engages with the undercut of the borehole following the rotation, the rotation-preventing element (18) slides towards the anchor head (16) with the recess (22) thereof, holding the anchor head (16) in the borehole in a rotationally fixed manner, and thus securing the anchoring.
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