Expansion anchor with grooves in the expansion cone
AssigneeHilti Aktiengesellschaft
InventorsPeter Gstach, Bernhard Winkler, Matteo Spampatti
Life of this patent
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Abstract
An expansion anchor with a bolt and at least one expansion element is disclosed. An oblique surface is arranged in the region of the first end of the bolt and forces the expansion element radially outward on the bolt if the bolt is displaced in a pull-out direction relative to the expansion element. The bolt has, in the region of its rear end facing away from the first end, a load-absorber which is suitable for introducing tensile forces which are directed in the pull-out direction into the bolt. At least one groove which is closed with respect to the first end is made in the oblique surface, which groove reduces the contact surface between the expansion element and the oblique surface.
Claims11
An expansion anchor, comprising:
- a bolt;
- and
- an expansion element;
- wherein an oblique surface is disposed in a region of a first end of the bolt, wherein the expansion element is forced radially outwards when the bolt is displaced in a pull-out direction relative to the expansion element;
- wherein the bolt has, in a region of a rear end of the bolt which faces away from the first end of the bolt, a load-absorber, wherein tensile forces which are directed in the pull-out direction are introducible into the bolt by the load-absorber;
- and wherein a groove that is closed with respect to the first end of the bolt, such that the groove is covered and not visible when viewed from in front of the expansion anchor with a viewing direction along a longitudinal axis of the bolt, is disposed in the oblique surface and wherein the groove reduces a contact surface between the expansion element and the oblique surface.
Dependencies are inferred from the claim text.