Patent ID: 7266874
Filing Date: 2007-09-11
Classification: F16B,Y10T

Abstract:
1. A method of installing an anchor and an elongated fastener in a friable material having a thickness and mounted on a member, comprising the steps of: providing an elongated anchor having an axis, an axial bore adapted to receive an elongated fastener, a flared end having torque transmitting surfaces therein, a proximal portion, on intermediate portion, a distal portion, and a drilling tip generally opposite said flared end; said proximal portion having a threaded exterior with a root, a crest diameter, and a thread height; said intermediate portion having a length, a threaded exterior with a root, a crest diameter substantially smaller than said crest diameter of said proximal portion, and a thread height substantially smaller than said thread height of said proximal portion; said distal portion having a length, a threaded exterior with a root that tapers toward said drilling tip, a crest diameter substantially smaller than said crest diameter of said proximal portion, and a thread height substantially smaller than said thread height of said proximal portion; wherein a combined length of the intermediate portion and the distal portion is larger than the thickness of the friable material; driving said anchor into said friable material so that said distal portion drills through said friable material and into said member, and said proximal portion threaded exterior engages said friable material; and inserting said elongated fastener into said axial bore.