Drywall Fastener,申请号US20070832311-传众专利搜索

Drywall Fastener

申请公布号：US2008019792(A1)

申请号：US20070832311

申请日期：2007.08.01

申请公布日期：2008.01.24

申请人：

ERNST RICHARD J;GRIMM JOHN P

发明人：ERNST RICHARD J.;GRIMM JOHN P.

分类号：F16B13/04

主分类号：F16B13/04

摘要：A self-drilling fastener for use in a friable material with or without an underlying member at the point of use comprises an elongated body, a threaded exterior, an enlarged head with torque transmitting surfaces, proximal, intermediate, and distal portions, and a drilling tip generally opposite enlarged head. Proximal portion has an axial length, a threaded exterior having root and crest diameters and a thread height, where the crest diameter is about twice the root diameter. Intermediate portion has an axial length, a threaded exterior having a root, a crest diameter substantially smaller than proximal portion crest diameter and a thread height substantially smaller than proximal portion thread height. Distal portion has an axial length, a threaded exterior with a root that tapers toward the drilling tip, a crest diameter substantially smaller than the proximal portion crest diameter, and a thread height substantially smaller than the proximal portion thread height portion.