Mechanical expansion anchor

Details Mechanical expansion anchor Mechanical expansion anchor

E - Fixed Constructions

21

D

85/2

E21D 21/02 (2006.01) F16B 13/06 (2006.01) F16B 13/14 (2006.01) F16B 13/00 (2006.01)

Patent

CA 2014683

An improved, radially expansible shell for use in a mechanical expasion anchor and an anchoring system including such a shell in combination with a resin grouting mix, in a drill hole of predetermined diameter. The shell includes a plurality of leaf portions having internal surfaces for engagement by a tapered camming plug as the shell is expanded, external surfaces having a maximum diameter less than that of the drill hole, and side edges. A row of tapered teeth extends outwardly from the external surface of each leaf along one of the side edges thereof. The distance from the central axis of the shell to the crests of the teeth is substantially equal to the radius of the drill hole. The teeth frictionally engage the drill hole wall to retard rotation of the shell and ensure the desired expansion. When the anchor is used with a conventional, two-compartment resin package, the resin components may flow around the shell into the annular space between the external surfaces of the leaves and the drill hole wall.

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