IMPROVED ANCHOR NUT FROM FIBRE-REINFORCED POLYMER Russian patent published in 2013 - IPC F16B31/02 E21D21/02 

FIELD: construction.

SUBSTANCE: anchor nut from fibre-reinforced polymer has an inner thread for screwing onto the anchor's thread, and also external shapes or forms, by means of which the anchor nut by means of a tool may be screwed onto the anchor's thread. The anchor nut is equipped with the first facility of torque limitation, which is made as capable of preventing further screwing of a partially screwed anchor with torque, the value of which is lower than the first limit value of the torque. The first facility for torque limitation is formed by means of a pin, which perpendicularly to the longitudinal axis of the anchor nut crosses the internal thread. The anchor nut is equipped with the second facility of torque limitation, which prevents further transfer of torque to the anchor nut via shapes or forms acting according to the principle of geometric closure, if the second limit value of the torque has been achieved or exceeded. The second facilities for torque limitation are formed by means of ledges consisting of a polymer, which are solidly formed on the external surface of the anchor nut.

EFFECT: simplification and reduction of an anchor nut, without reduction of its bearing capacity.

15 cl, 6 dwg