Self drilling anchoring dowel

Abstract

A self drilling anchoring dowel for drilling a hole into a hard support structure and anchoring in this hole to be available as a fixture by means of which an object may be attached to the support structure. The dowel is formed as an elongated dowel body having a front end and a rear end. At the front end, a drilling head is formed and, spacedly from the rear end, a circumferential weakened zone is provided in the wall of the dowel body in which zone the thickness of this wall is diminished. Thus, at the rear end of the dowel body, a rear terminal section is delimited which may be broken off therefrom after the dowel has been driven to a desired depth into the structure, so that a front end is provided on the dowel body which end is substantially flush with the structure surface. A longitudinal bore inside the dowel body extends therethrough and is available for removing from the drilled hole waste chips and dust produced by drilling. The bore is constricted in the region of the drilling head for preventing entrance into the bore of large chips of the severed material possibly jamming the bore. The dowel is devised to be used in connection with a hammer drill having exhausting means, so that the waste chips and drilling dust are evacuated and do not infest the surrounding atmosphere. The rear terminal section of the dowel body is configurated to be engageable by a dowel holder attached to the hammer drill.

Dependencies are inferred from the claim text.