Expanding wall anchor and use for fixing a component to a support material

Abstract

Expanding wall anchor, comprising (i) a threaded longitudinal body formed as a single piece with an expansion cone at one of its ends, this cone being connected to the rest of the body by a cylindrical portion of diameter d 1 smaller than the nominal diameter D of the body, and (ii) an expanding sleeve of thickness e mounted around the said cylindrical portion of the body and through which the expansion cone is intended to be moved in order to deform the sleeve and anchor the wall anchor in a hole in a support material, characterized in that the ratio d 1 /D is greater than or equal to 60% and the ratio e/d 1 is greater than or equal to 22%.

The invention claimed is: 
     
       1. An expanding wall anchor, comprising:
 i) a longitudinal body formed as a single piece and including an expansion cone, a cylindrical portion, and a threaded portion, wherein the expansion cone forms a first end of the longitudinal body, the threaded portion forms a second opposing end of the longitudinal body, and the expansion cone is connected to the threaded body via the cylindrical portion, and 
 ii) an expanding sleeve of thickness (e) mounted around the cylindrical portion of the body and through which the expansion cone is configured to move to deform the expanding sleeve and to anchor the expanding wall anchor in a hole in a support material, wherein
 the cylindrical portion has a diameter (d 1 ), the longitudinal body has a nominal diameter (D), and the diameter of the cylindrical portion (d 1 ) is smaller than the nominal diameter of the longitudinal body (D), 
 the expanding sleeve has a maximum outside diameter (d 2 ) that is substantially equal to the nominal diameter of the longitudinal body (D), 
 a first ratio (d 1 /D) of the diameter of the cylindrical portion (d 1 ) to the nominal diameter of the longitudinal body (D) is greater than or equal to 60%, 
 and a second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the cylindrical portion (d 1 ) is greater than or equal to 22%. 
 
 
     
     
       2. The expanding wall anchor of  claim 1 , wherein the second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the cylindrical portion (d 1 ) is less than 35%. 
     
     
       3. The expanding wall anchor of  claim 1 , wherein the expansion cone has an angle (a) greater than or equal to 25 degrees. 
     
     
       4. The expanding wall anchor of  claim 1 , wherein the expansion cone has an angle (a) greater than or equal to 26 degrees. 
     
     
       5. The expanding wall anchor of  claim 1 , wherein the expansion cone has an angle (a) less than or equal to 35 degrees. 
     
     
       6. The expanding wall anchor of  claim 1 , wherein the expansion cone has an angle (a) less than or equal to 30 degrees. 
     
     
       7. The expanding wall anchor of  claim 1 , wherein the nominal diameter of the longitudinal body (D) is between 6 mm and 30 mm. 
     
     
       8. The expanding wall anchor of  claim 1 , wherein the diameter of the cylindrical portion (d 1 ) is between 3 mm and 15 mm. 
     
     
       9. The expanding wall anchor of  claim 1 , wherein the thickness of the expanding sleeve (e) is between 0.7 mm and 3.5 mm. 
     
     
       10. The expanding wall anchor of  claim 1 , wherein the expanding sleeve has a length representing less than 25% of a length of the longitudinal body. 
     
     
       11. The expanding wall anchor of  claim 10 , wherein the expanding sleeve has a length representing less than 20% of a length of the longitudinal body. 
     
     
       12. The expanding wall anchor of  claim 1 , wherein the expansion cone has a maximum diameter (d 3 ) substantially equal to the nominal diameter of the longitudinal body (D). 
     
     
       13. The expanding wall anchor of  claim 1 , wherein the cylindrical portion of diameter (d 1 ) is connected by a cylindrical portion of nominal diameter (D) to a threaded part of the longitudinal body. 
     
     
       14. The expanding wall anchor of  claim 1 , wherein the expanding wall anchor is configured for fixing an object to the support material. 
     
     
       15. The expanding wall anchor of  claim 1 , wherein the expanding wall anchor is configured for fixing an object to the support material, and wherein the support material is liable to be subjected to seismic loadings. 
     
     
       16. The expanding wall anchor of  claim 1 , wherein the expanding wall anchor is configured to hold fast under seismic loading in cracked concrete. 
     
     
       17. The expanding wall anchor of  claim 1 , wherein:
 the first ratio (d 1 /D) of the diameter of the cylindrical portion (d 1 ) to the nominal diameter of the longitudinal body (D) is greater than or equal to 60%, 
 the second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the cylindrical portion (d 1 ) is greater than or equal to 22%, 
 the second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the cylindrical portion (d 1 ) is less than 35%, 
 the expansion cone has an angle (a) that is greater than or equal to 27 degrees, and the angle of the expansion cone (a) is less than or equal to 30 degrees, 
 the expanding sleeve has an outside diameter (d 2 ) substantially equal to the nominal diameter of the longitudinal body (D), 
 the nominal diameter of the longitudinal body (D) is between 8 mm and 16 mm, 
 the diameter of the cylindrical portion (d 1 ) is between 3 mm and 15 mm, 
 the thickness of the expanding sleeve (e) is between 0.7 mm and 3.5 mm, and 
 the expanding sleeve has a length representing less than 20% of a length of the longitudinal body. 
 
     
     
       18. An expanding wall anchor, comprising:
 a longitudinal body which is a single piece and comprises:
 an expansion cone forming a first end of the longitudinal body, 
 a first cylindrical portion having a first end and an opposing second end, wherein the first end of the first cylindrical portion is connected to an end of the expansion cone, 
 a second cylindrical portion having a first end and an opposing second end, wherein the first end of the second cylindrical portion is connected to the second end of the first cylindrical portion, and 
 a threaded portion forming a second end of the longitudinal body, wherein an end of the threaded portion is connected to the second end of the second cylindrical portion; and 
 
 an expanding sleeve of thickness (e) which is mounted around the first cylindrical portion of the longitudinal body and into which the expansion cone is configured to move to deform the expanding sleeve and to anchor the expanding wall anchor in a hole in a support material, 
 wherein:
 the expansion cone, the first cylindrical portion, the second cylindrical portion, and the threaded portion are formed from a single piece, 
 the first cylindrical portion has a diameter (d 1 ), the second cylindrical portion has a diameter (D), and the diameter of the first cylindrical portion (d 1 ) is less than the diameter of the second cylindrical portion (D), 
 the expanding sleeve has a maximum outside diameter (d 2 ) that is substantially equal to the diameter of the second cylindrical portion (D), 
 a first ratio (d 1 /D) of the diameter of the first cylindrical portion (d 1 ) to the diameter of the second cylindrical portion (D) is greater than or equal to 60%, 
 a second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the first cylindrical portion (d 1 ) is greater than or equal to 22%, and 
 the expansion cone has an angle (a) greater than or equal to 27 degrees. 
 
 
     
     
       19. An expanding wall anchor, comprising:
 a longitudinal body which is a single piece and comprises:
 an expansion cone forming a first end of the longitudinal body, 
 a first cylindrical portion having a first end and an opposing second end, wherein the first end of the first cylindrical portion is connected to an end of the expansion cone, 
 a second cylindrical portion having a first end and an opposing second end, wherein the first end of the second cylindrical portion is connected to the second end of the first cylindrical portion, and 
 a threaded portion forming a second end of the longitudinal body, wherein an end of the threaded portion is connected to the second end of the second cylindrical portion; and 
 
 an expanding sleeve of thickness (e) which is mounted around the first cylindrical portion of the longitudinal body and into which the expansion cone is configured to move to deform the expanding sleeve and to anchor the expanding wall anchor in a hole in a support material, 
 wherein:
 the expansion cone, the first cylindrical portion, the second cylindrical portion, and the threaded portion are formed from a single piece, 
 the first cylindrical portion has a diameter (d 1 ), the second cylindrical portion has a diameter (D), and the diameter of the first cylindrical portion (d 1 ) is less than the diameter of the second cylindrical portion (D), 
 the expanding sleeve has a maximum outside diameter (d 2 ) that is substantially equal to the diameter of the second cylindrical portion (D), 
 a first ratio (d 1 /D) of the diameter of the first cylindrical portion (d 1 ) to the diameter of the second cylindrical portion (D) is greater than or equal to 60%, 
 a second ratio (e/d 1 ) of the thickness of the expanding sleeve (e) to the diameter of the first cylindrical portion (d 1 ) is greater than or equal to 22%, and 
 the threaded portion has a length greater than a combined length of the cone, the first cylindrical portion, and the second cylindrical portion.