# US 10,480,559 B2 · Fastener with head cutting structure

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,480,559 B2
- Document ID: US10480559B2
- Status: Granted
- Kind: B2
- Application number: 14/536,071
- Filed: 2014-11-07
- Published: 2015-03-05
- Granted: 2019-11-19
- Earliest claimed: 2012-05-10
- Assignees: Simpson Strong-Tie Company, Inc.
- Applicants: Simpson Strong-Tie Company, Inc.
- Inventors: Jeremy Scott Park
- Web page: https://patentgrep.com/patent/US10480559B2

## CPC

- F16B 25/0036: {characterised by geometric details of the screw}
- F16B 25/0015: {the material being a soft organic material, e.g. wood or plastic (F16B25/0031 takes precedence)}
- F16B 25/0063: {with a non-threaded portion on the shaft of the screw}
- F16B 25/0068: {with multiple-threads, e.g. a double thread screws}
- F16B 25/0073: {characterised by its pitch, e.g. a varying pitch}
- F16B 35/065: {with self-countersink-cutting means}
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

A fastener includes a shank having a point at a first end and a second, head end. A head structure at the head end includes a top portion and having a cutting structure, the cutting structure comprising four planar walls, each wall engaging the shank at an angle, each wall adjoining an adjacent wall by a rounded edge.

## Claims

### Claim 1

A fastener, comprising:
a shank having a first end and a second end, the shank having at least a first region having a first helical thread having a first effective diameter; and
a head positioned at the second end of the shank, the head having a top portion including a disk having a diameter, a top surface and a bottom surface, and having a cutting structure, the cutting structure comprising four walls, each wall comprising a first arcuate portion and a second arcuate portion, each wall engaging the shank at an angle, each wall engaging the bottom surface of the disk at a non-normal angle and a plurality of rounded edges, one of the plurality of rounded edges positioned between each of two adjacent walls.

### Claim 2 (depends on 1)

The fastener of claim 1 wherein the cutting structure has a square cross-section formed by four walls (153) intersecting the top portion, each wall defined on two sides by two of said plurality of rounded edges, the plurality of said rounded edges being straight relative to each adjacent wall.

### Claim 3 (depends on 1)

The fastener of claim 1 wherein the cutting structure has a square cross-section formed by four walls intersecting the second end of the shank.

### Claim 4 (depends on 1)

The fastener of claim 1 wherein each of the plurality of rounded edges (263) makes a one-eighth turn from a point intersecting the shank to a point intersecting a bottom surface of a disk at the top portion of the head.

### Claim 5 (depends on 1)

The fastener of claim 1 wherein the head includes a triangular edged nib (143) extending out from the top portion of the head and bisecting each wall.

### Claim 6 (depends on 1)

The fastener of claim 1 wherein the walls intersect the bottom surface with at least one beveled edge (153a/b) per wall between the walls and the bottom surface.

### Claim 7 (depends on 1)

The fastener of claim 1 wherein each wall engages the bottom surface of the disk at a beveled edge, and the beveled edge (153a/b) per wall is bisected by the nib.

### Claim 8 (depends on 1)

The fastener of claim 1 wherein the first arcuate portion (192) and the second arcuate portion (194) form different angles with the shank.

### Claim 9

A wood screw fastener, comprising:
a shank having a point at a first end and a second end, and having a base shank diameter, and
a head at the second end comprising a disk having a top surface and a bottom surface defining a diameter, and a structure having four walls forming a square cross-section smaller than the diameter of the head, each wall comprising a first arcuate portion and a second arcuate portion, each wall intersecting the bottom of the disk and the shank, and a plurality of rounded edges, one of the plurality of rounded edges positioned between two adjacent walls.

### Claim 10 (depends on 9)

The fastener of claim 9 wherein for the four walls (153) intersecting the shank, each of the plurality of rounded edges includes a first straight side abutting a first wall and a second straight side abutting a second wall.

### Claim 11 (depends on 9)

The fastener of claim 9 wherein each wall intersects the shank and the bottom of the disk at an angle.

### Claim 12 (depends on 9)

The fastener of claim 9 wherein each rounded edge (263) makes a one-eighth turn from a point intersecting the shank to a point intersecting a bottom surface of the disk.

### Claim 13 (depends on 9)

The fastener of claim 9 wherein the head further includes a nib extending out from a bottom surface of the disk and bisecting each wall, each nib having a triangular cross-section.

### Claim 14 (depends on 9)

The fastener of claim 9 wherein walls intersect the bottom surface with at least one beveled edge (153a/b) per wall between the walls and the bottom surface.

### Claim 15 (depends on 14)

The fastener of claim 14 wherein the at least one beveled edge (153a/b) per wall is bisected by a nib bisecting each wall.

### Claim 16 (depends on 9)

The fastener of claim 9 wherein the arcuate first portion and the section arcuate portion form different angles with the shank.