Rivet screw drill

Patent metadata

Field	Value
Publication number	US-10125805-B2
Application number	US-201615131204-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	Apr 21, 2015
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A rivet screw drill for fastening at least two panels, the rivet screw drill includes a head portion mounted to a fastening tool, a fastening portion integrally formed with the head portion and of which a screw thread is formed thereto and a perforating portion integrally formed with the fastening portion and pressurizing and penetrating the panels by rotation according to operation of the fastening tool, wherein a mounting protrusion, connected to the fastening tool, is protruded from the head portion and a plurality of support ends are formed to the mounting protrusion.

First claim

What is claimed is:

1. A rivet screw drill for fastening at least two panels, the rivet screw drill comprising:
a head portion mounted to a fastening tool;
a fastening portion integrally formed with the head portion and of which a screw thread is formed thereto; and
a perforating portion integrally formed with the fastening portion and pressurizing and penetrating the panels by rotation according to operation of the fastening tool, wherein
a mounting protrusion, connected to the fastening tool, is protruded from the head portion and a plurality of support ends are formed to the mounting protrusion, and a concave space is formed between the support ends,
the perforating portion becomes sharp toward an end thereof,
the fastening portion and the perforating portion have a cross section shaped as Reuleaux triangle, and
the perforating portion has a perforating edge groove which comprises a first surface and a second surface that are formed from the end of the perforating portion,
the first surface being a curved surface formed from the end of the perforating portion toward the fastening portion and the second surface being a flat surface connecting the first surface with an outer surface of the perforating portion.

2. The rivet screw drill of claim 1 , wherein the support ends are formed as a pair and radially disposed.

3. The rivet screw drill of claim 2 , wherein six support ends are formed as a sunflower shape.

4. The rivet screw drill of claim 1 , wherein three support ends are formed and radially disposed.

5. The rivet screw drill of claim 4 , wherein the support ends are shaped as a triangular circle.

6. The rivet screw drill of claim 1 , wherein the fastening portion comprises:
a main screw thread shaped as a triangle formed from the head portion to a part of the fastening portion; and
a sub-screw thread round shaped from the main screw thread to the other portion of the perforating portion.

7. The rivet screw drill of claim 1 , wherein:
the perforating portion becomes sharp toward an end thereof; and
a round contact edge contacting the panel is formed to the end of the perforating portion.

8. The rivet screw drill of claim 7 , wherein an edge groove is formed to an end of the perforating portion.

9. The rivet screw drill of claim 8 , wherein the edge groove is formed as a cone.

10. The rivet screw drill of claim 7 , wherein the fastening portion comprises:
a main screw thread shaped as a triangle formed from the head portion to a part of the fastening portion; and
a sub-screw thread round shaped from the main screw thread to the other portion of the perforating portion.

11. The rivet screw drill of claim 7 , wherein:
the fastening portion and perforating portion have a cross section shaped as a Reuleaux triangle.

12. The rivet screw drill of claim 1 , wherein:
the perforating portion becomes sharp toward an end thereof; and
a line contact edge is formed to the end of the perforating portion contacting the panel.

13. The rivet screw drill of claim 12 , wherein a cutting surface is formed to the perforating portion.

14. The rivet screw drill of claim 1 , wherein the fastening portion comprises:
a main screw thread shaped as a triangle formed from the head portion to a part of the fastening portion; and
a sub-screw thread round shaped from the main screw thread to the other portion of the perforating portion.

15. The rivet screw drill of claim 1 , wherein:
the fastening portion and perforating portion have a cross section shaped as a Reuleaux triangle.

16. The rivet screw drill of claim 1 , wherein:
a rim is protruded from the head portion.

Assignees

• Sungwoo Hitech Co Ltd
• Sungwoo Hitech Co Ltd

Inventors

• Park Byung Joon
• Lee Mun Yong

Classifications

• F16B25/10

  Screws performing an additional function to thread-forming, e.g. drill screws {or self-piercing screws} · CPC title

• F16B25/0084 Primary

  characterised by geometric details of the tip · CPC title

• F16B25/106

  by means of a self-piercing screw-point, i.e. without removing material · CPC title