Importance

Loading Importance Indicators...

Abstract

A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a fastener serving to hold a fixture adjacent the wall. The anchor includes an externally-threaded shank section having a head engageable by the screwdriver and a longitudinal bore to receive the fastener. Integral with the shank section and extending axially therefrom is a core drill section whose bit includes at least one cutting blade and whose outer cylindrical surface acts as guide means whereby as the anchor is turned in to the wall by a screwdriver, the cutting blade then bores a round hole therein whose bank is engaged by the cylindrical surface to ensure circularity of the drilled hole. And as the anchor continues to turn, the shank section enters and taps the drilled hole until its head engages the outer surface of the wall to complete the anchor installation.

Loading the Abstract Image...

First Claim