US Patent:
20090074533, Mar 19, 2009
Inventors:
Paul Kucharyson - Boulder CO, US
International Classification:
F16B 13/04
Abstract:
A self-drilling anchor is provided which includes an elongated tapered plastic body and anchor assembly. The body has an external helical threaded portion, a central clear bore for receiving the anchoring assembly, two diametrically opposed break-away slotted portions, and an axial driving flange concentrically positioned relative to the tapered body first end. The flange has inner and outer walls, a central clear aperture for receiving a screw driver, and at least two diametrically opposed notches for receiving a bladed driver for drilling the tapered body into a hollow wall. The anchoring assembly is centrally received in the clear bore, and includes an externally threaded screw, a collar, and at least two diametrically opposed separable arms. The collar is internally threaded for receiving the screw. The separable arms have spring loaded ends and pointed ends. The spring loaded ends are pivotally attached to the collar. The pointed ends of the separable arms form a disconnected pointed drilling tip when pivoted in a collapsed orientation, and an anchor supporting orientation when operated for separation, by rotation of the screw, through the break away slotted portions, for engagement of the separable arms with an inner surface of the hollow wall to be anchored.
