Self-drilling anchor assembly

Patent metadata

Field	Value
Publication number	US-2019219084-A1
Application number	US-201916243541-A
Country	US
Kind code	A1
Filing date	Jan 9, 2019
Priority date	Jan 12, 2018
Publication date	Jul 18, 2019
Grant date	—

Abstract

A self-drilling anchor assembly including a drill bit and an anchor positioned over and attached to the drill bit. In various embodiments, the drill bit includes a shank, a drill head integrally connected to one end of the shank, and a threaded tail integrally connected to an opposite end of the shank. The tail includes a mechanical engaging structure that is engageable by a tool to rotate the drill bit, and a helical thread formation to facilitate attachment of a securing device such as nut and washer to the tail of the drill bit. The anchor includes an elongated generally tubular body including an inner surface defining a longitudinally extending inner channel, and a head integrally connected to and extending from a first end of the body. The drill bit is configured to remain in the anchor and in the substrate after installation of the anchor assembly in the substrate.

First claim

We claim:

1 . A self-drilling anchor assembly comprising:
a drill bit including
a shank,
a drill head integrally connected to a front end of the shank, the drill head including a solid body having a tip end, an intermediate portion, and a rear end integrally connected to the shank, the intermediate portion having a wider outer diameter than the tip end and the rear end, the body including an outer surface that includes recessed sections that respectively define longitudinally extending flutes that each extend longitudinally along a portion of the body toward the shank, and
a tail integrally connected to a rear end of the shank, the tail including a mechanical engaging structure that is engageable by a tool to rotate the drill bit, the tail including a thread formation to facilitate attachment of a securing device to the tail; and
an anchor including an elongated body including an inner surface defining a longitudinally extending inner channel, and a head integrally connected to and extending from a rear end of the elongated body.

2 . The self-drilling anchor assembly of claim 1 , wherein the flutes each have a partially cylindrical cross section and are configured to direct loose material of a substrate that is broken away by the tip end.

3 . The self-drilling anchor assembly of claim 1 , wherein the flutes are respectively aligned with and are configured to communicate loose material to additional flutes defined by the shank.

4 . The self-drilling anchor assembly of claim 1 , wherein the tip end of the drill head has a pointed drill tip positioned along a central longitudinal axis.

5 . The self-drilling anchor assembly of claim 4 , wherein the tip end of the drill head includes front outwardly and rearwardly extending angled cutting edges that extend from the tip.

6 . The self-drilling anchor assembly of claim 5 , wherein drill head includes a first side portion that includes a multi-edge and multi-section cutting surface that extends rearwardly and outwardly from the cutting edges.

7 . The self-drilling anchor assembly of claim 6 , wherein the drill head includes a second side portion that includes a multi-edge and multi-section cutting surface that extends rearwardly and outwardly from the cutting edges.

8 . A self-drilling anchor assembly comprising:
a drill bit including:
a shank,
a drill head integrally connected to a front end of the shank, and
a tail integrally connected to a rear end of the shank, the tail including a mechanical engaging structure that is engageable by a tool to rotate the drill bit, the tail including a thread formation to facilitate attachment of a securing device to the tail; and
an anchor including
an elongated body including an inner surface defining a longitudinally extending inner channel, the elongated body further defining spaced apart longitudinally extending openings, and
a head integrally connected to and partially extending transversely from a rear end of the elongated body.

9 . The self-drilling anchor assembly of claim 8 , wherein the anchor is configured to rotate relative to the drill bit.

10 . The self-drilling anchor assembly of claim 8 , wherein the anchor is coupled to the drill bit such that rotation of the drill bit causes rotation of the anchor.

11 . The self-drilling anchor assembly of claim 10 , wherein the anchor is coupled to the drill bit by at least one inwardly extending tab configured to engage an outer surface of the drill bit.

12 . The self-drilling anchor assembly of claim 10 , wherein the anchor is coupled to the drill bit by inwardly extending tabs each configured to engage a portion of the outer surface of the drill bit.

13 . The self-drilling anchor assembly of claim 10 , wherein the drill bit defines longitudinally extending flutes.

14 . The self-drilling anchor assembly of claim 13 , wherein the flutes of the drill bit each have a partially cylindrical cross section and are configured to direct loose material of a substrate that is broken away by the tip end.

15 . The self-drilling anchor assembly of claim 13 , wherein the flutes of the drill bit are defined by the shank and are respectively aligned with and are configured to communicate loose material to additional flutes defined by the drill head of the drill bit.

16 . The self-drilling anchor assembly of claim 8 , wherein the shank and drill head of the drill bit define aligned longitudinally extending flutes and the spaced apart longitudinally extending openings of the anchor are configured to respectively align with the flutes.

17 . A self-drilling anchor assembly comprising:
a drill bit including:
a shank defining an annular groove,
a drill head integrally connected to a front end of the shank, and
a tail integrally connected to a rear end of the shank, the tail including a mechanical engaging structure that is engageable by a tool to rotate the drill bit, the tail including a thread formation to facilitate attachment of a securing device to the tail; and
an anchor including
an elongated body including an inner surface defining a longitudinally extending inner channel,
an attachment ring extending inwardly from the inner surface of the elongated body, and
a head integrally connected to and partially extending transversely from a rear end of the elongated body.

18 . The self-drilling anchor assembly of claim 17 , wherein the attachment ring includes a plurality of separate attachment portions.

19 . The self-drilling anchor assembly of claim 17 , wherein the shank of the drill bit defines longitudinally extending flutes.

20 . The self-drilling anchor assembly of claim 17 , wherein the anchor defines spaced apart longitudinally extending openings.

Assignees

• Illinois Tool Works

Inventors

• Dill Michael
• Mendez Jaquez Miguel E
• Versino Anthony

Classifications

• F16B13/003 Primary

  with a separate drilling bit attached to or surrounded by the dowel element · CPC title

• F16B13/065

  fastened by extracting the screw, nail or the like · CPC title