Tubular anchor

Abstract

A tubular anchor to be inserted into a bore formed in a constructional structure and including a hollow anchor body ( 1 ), and a trapezoidal thread-shaped profile ( 2 ) provided on at least a portion of an outer surface of the anchor body ( 1 ) and having a crest region ( 3 ) and a root region ( 4 ) both extending parallel to a longitudinal axis of the anchor body ( 1 ), with the at least flanks of a trapezoidal cross-section of the profile ( 2 ) remote from an end of the anchor body ( 1 ) facing in a setting direction being inclined with respect to the longitudinal axis of the anchor body ( 1 ) at an angle (α) from 10° to 45°.

What is claimed is:  
     
         1 . A tubular anchor to be inserted into a bore formed in a constructional structure, comprising a hollow anchor body ( 1 ); and a trapezoidal thread-shaped profile ( 2 ) provided on at least a portion of an outer surface of the anchor body ( 1 ) and having a crest region ( 3 ) and a root region ( 4 ) both extending parallel to a longitudinal axis of the anchor body ( 1 ), wherein at least flanks of a trapezoidal cross-section of the profile ( 2 ) remote from an end of the anchor body ( 1 ) facing in a setting direction are inclined with respect to the longitudinal axis of the anchor body ( 1 ) at an angle (α) from 10° to 45°.  
     
     
         2 . A tubular anchor according to  claim 1 , wherein an axial extent (a) of the root region ( 4 ) corresponds to from 0.04 to 0.1 times of a diameter (d) of the anchor body ( 1 ).  
     
     
         3 . A tubular anchor according to  claim 1 , wherein an axial extent of the crest region ( 3 ) corresponds to from 0.04 to 0.1 times of a diameter (d) of the anchor body ( 1 ).  
     
     
         4 . A tubular anchor according to  claim 1 , wherein an axial extent (b) of the crest region ( 3 ) corresponds to an axial extent (a) of the root region ( 4 ).  
     
     
         5 . A tubular anchor according to  claim 1 , wherein an the profile ( 2 ) has, in a direction transverse to the longitudinal axis of the anchor body ( 1 ), a height (h) corresponding to from 0.25 to 0.75 times of a wall thickness of the anchor body ( 1 ).  
     
     
         6 . A tubular anchor according to  claim 1 , wherein the trapezoidal thread-shaped profile ( 2 ) has a pitch from 10 mm to 40 mm.  
     
     
         7 . A tubular anchor according to  claim 1 , wherein profile-forming trapezoidal thread is a double thread.  
     
     
         8 . A tubular anchor according to  claim 1 , wherein the trapezoidal thread-shaped profile ( 2 ) extends over an entire length of the anchor body ( 1 ).  
     
     
         9 . A tubular anchor according to  claim 1 , wherein the trapezoidal thread-shaped profile ( 2 ) has an anti-stick coating ( 5 ) for preventing adhesion of a mortar mass to the profile ( 2 ).