Tension anchorage system
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United States of America Patent
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Issued Date -
Jan 11, 2007
app pub date -
Jun 16, 2006
filing date -
Oct 3, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A wedge anchor for holding a rod under a load is provided. The wedge anchor comprises a barrel comprising a wedge receiving face opposite a rod receiving face. A barrel passage extends therethrough between the wedge receiving face and the rod receiving face. The passage narrows toward the rod receiving face and has an axial cross-sectional profile defining a convex arc having a barrel centre of radius of curvature. The wedge anchor also comprises a plurality of wedges that are insertable into the passage. Each of the wedges comprises an inner wedge face for defining a rod receiving passage for receiving the rod and an outer wedge face, opposite the inner wedge face, in axial cross section having a profile complementary to the convex arc. The outer wedge face has a wedge-face centre of radius of curvature, which is offset relative to the barrel centre of radius of curvature. Each of the wedges further comprise a deformable material having sufficient shear strength to prevent shear stress failure of the wedge and to ensure that the rod is held in place when the wedge anchor is in its loaded configuration.
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