Expansion anchor

Abstract

An expansion anchor is disclosed. The expansion anchor includes an anchor bolt with a longitudinal axis and an expansion body on a first terminal section of the anchor bolt, an actuator on a second terminal section of the anchor bolt, and an expansion sleeve which surrounds the anchor bolt. The expansion body, on the radial outside, is at different distances from the longitudinal axis with reference to at least one identical point on the longitudinal axis in a transfer zone.

1 - 11 . (canceled) 
     
     
         12 . An expansion anchor, comprising:
 an anchor bolt with a longitudinal axis and an expansion body on a first terminal section of the anchor bolt;   an actuator disposed on a second terminal section of the anchor bolt; and   an expansion sleeve disposed around the anchor bolt;   wherein the expansion body, on a radial outside in a transfer zone, has a plurality of first points that are located at a maximum distance from the longitudinal axis and a plurality of seconds point that are located at a minimum distance from the longitudinal axis;   and wherein the expansion sleeve is radially expandable by the plurality of first points.   
     
     
         13 . The expansion anchor according to  claim 12 , wherein the transfer zone is corrugated or serrated and wherein the maximum distance and the minimum distance differ by at least 1%. 
     
     
         14 . The expansion anchor according to  claim 12 , wherein the expansion body outside of the transfer zone has a conical geometry. 
     
     
         15 . The expansion anchor according to  claim 12 , wherein the transfer zone has a shape essentially of a cylinder, wherein the cylinder shape has a longitudinal axis, and wherein the longitudinal axis of the cylinder shape is coaxial with the longitudinal axis of the anchor bolt. 
     
     
         16 . The expansion anchor according to  claim 12 , wherein the transfer zone has an essentially conical shape and wherein an apex angle of the transfer zone is smaller than an apex angle of the expansion body outside of the transfer zone. 
     
     
         17 . The expansion anchor according to  claim 12 , wherein the plurality of first points are connected by a virtual circumscribed circle wherein a center of the circumscribed circle corresponds to the longitudinal axis, and wherein the plurality of second points are connected by a virtual inscribed circle wherein a center of the inscribed circle corresponds to the longitudinal axis. 
     
     
         18 . The expansion anchor according to  claim 17 , wherein a radius of the circumscribed circle differs by at least 1% from a radius of the inscribed circle. 
     
     
         19 . The expansion anchor according to  claim 17 , wherein the expansion body outside of the transfer zone is conical and wherein in the transfer zone the inscribed circle or the circumscribed circle has an essentially constant radius. 
     
     
         20 . The expansion anchor according to  claim 17 , wherein a radius of the circumscribed circle has a deviation of less than 10% and wherein a radius of the inscribed circle has a deviation of less than 10%. 
     
     
         21 . The expansion anchor according to  claim 12 , wherein the actuator is comprised of a thread on the anchor bolt and a shim and a nut disposed on the thread. 
     
     
         22 . The expansion anchor according to  claim 12 , wherein the anchor bolt and/or the expansion body and/or the actuator are made at least partly of a metal. 
     
     
         23 . The expansion anchor according to  claim 22 , wherein the metal is steel.