Patent ID: 7320569

Claim:
A self drilling hollow wall anchor for deployment into a hollow wall or substrate, said anchor comprising an elongated plastic body having two ends on a central longitudinal axis, and a longitudinal bore adapted for threadingly receiving a screw therein, with the anchor comprising a head member at a first end of the plastic body and a drilling member with a drilling tip at the other end of the plastic body, the plastic body having a radial flange concentrically positioned relative to the plastic body at the first end adjacent the head member; wherein the head member, adjacent the flange, and the plastic body comprise longitudinally positioned and radially outwardly extending external threads adapted for screwing deployment into the hollow wall; wherein the anchor further comprises anchoring means adapted to be distal to the wall when the anchor is deployed in the wall, with the anchoring means comprising connected but separable elements of the drilling member, said separable elements being connected to each other at said drilling tip and the threaded head member, with the separable elements being separated by a slot which interrupts at least one flight of the threads and wherein the slot comprises at least two adjacent cam elements with each cam element extending from one of the separable elements to the other cam element respectively; and wherein a central aperture is formed in the flange for engagement with a rotating driver for threadingly driving the anchor into a hollow wall whereby threading insertion of the screw causes the connected separable elements to separate at said drilling tip into the anchoring means with the screw engaging the cam elements and locking the separated separable elements, with the cam elements being adapted to remain in engagement with the screw into an anchoring position with at least one flight of the threads thereby engaging a distal portion of the wall.