Patent ID: 9624770
Date: 2017-04-18
CPC Classifications: B23B,E21D,F16B

Claim:
1. A self-undercut expansion anchor for enlarging a lowermost end of a bore hole, the self-undercut anchor comprising: a. a drill connector portion operatively connected to a drill; b. a setting tool connected to the drill connector portion, said setting tool having a lower setting tool portion comprised of a central opening on an underside thereof; c. a threaded drill rod sized to fit into the bore hole, said threaded drill rod further comprising: d. a bore hole sleeve positioned on the threaded drill rod to be slid into the bore hole; e. an anchor positioned on the threaded drill rod and connected to the bore hole sleeve to be slid into the bore hole; and, f. a cutting tip portion connected to the lower end of the threaded drill rod and engaged with the anchor for enlarging a lowermost end of the bore hole.