THREADED FASTENER

• US 20130309042A1
• Filed: 10/16/2012
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Abandoned Application

• Current Assignee: Ming-Lai Chao
• Original Assignee: Ming-Lai Chao
• Inventors: CHAO, Ming-Lai
• Application Number:
  US13/652,850
• Publication Number:
  US 20130309042A1
• Time in Patent Office: Days
• US Class Current: 411/387.1
• CPC Class Codes: F16B 25/0015 the material being a soft organic material, e.g. wood or plastic F16B25/0031 takes precedence
• CPC Class Codes: F16B 25/0078 with a shaft of non-circular cross-section or other special geometric features of the shaft
• CPC Class Codes: F16B 25/0084 characterised by geometric details of the tip

Abstract

A threaded fastener includes a top head portion, a shank, a thread and first and second flutes. The shank includes a threaded portion that extends axially along a central axis and a connecting portion that extends upwardly and axially along the central axis from the threaded portion to the top head portion. The thread extends upwardly and helically around an outer periphery of the threaded portion and along the central axis. The first flute is indentedly formed on the threaded portion and extends upwardly along the central axis. The second flute is indentedly formed on the threaded portion and above the first flute, and extends upwardly and axially along the central axis and opposite to the first flute.

Claims

1. A threaded fastener, comprising:

a top head portion;

a shank including a threaded portion that extends axially along a central axis, and a connecting portion that extends upwardly and axially along the central axis from said threaded portion to said top head portion;

a thread that extends upwardly and helically around an outer periphery of said threaded portion and along the central axis;

a first flute that is indentedly formed on said threaded portion and that extends upwardly along the central axis; and

a second flute that is indentedly formed on said threaded portion and above said first flute and that extends upwardly and axially along the central axis and opposite to said first flute relative to the central axis.

2. The threaded fastener as claimed in claim 1, wherein said threaded portion has a main portion and an end portion tapering downwardly away from said main portion, said first flute extending upwardly from said end portion to said main portion, said second flute being formed on said main portion.