Patent ID: 7001124

Claim:
A self-drilling anchor for use in a friable material, comprising: a body having an axis, a flanged rear end, a drilling front end and a generally cylindrical portion therebetween having an outer surface with a thread disposed thereon; wherein said body forks, beginning at a predetermined distance from said flanged rear end, into a first leg and a second leg, said first leg extending forwardly into a drilling tip and having a generally rearward facing shoulder angled obtusely outwardly with respect to said axis; wherein said body has an axial bore for receiving an elongate fastener, said axial bore extending substantially through said flanged end and said generally cylindrical portion and leading to said generally rearward facing shoulder; wherein said anchor has a drilling mode wherein said second leg nests behind said generally rearward facing shoulder of said first leg, and an anchoring mode wherein said legs are pivoted apart from one another; wherein said first leg and said second leg are demarcated from one another by a pair of slits beginning at said fork and extending substantially through said outer surface and said thread of said generally cylindrical portion, said slits being on generally opposite sides of said outer surface; and wherein said slits have a zig-zag shape defining a plurality of similar shaped interfacing teeth on each of said legs.