# US 5,447,401 A · Fastener for securing a structural component to a carpet pad

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- Number: US 5,447,401 A
- Document ID: US5447401A
- Status: Granted
- Kind: A
- Application number: 08/140,427
- Filed: 1993-10-25
- Granted: 1995-09-05
- Earliest claimed: 1993-10-25
- Assignees: Jasco Corporation
- Inventors: Stephen W. Jones; Glenn A. Davis; David D. McCormick; James D. TerMeer; Donald L. Rohrs
- Web page: https://patentgrep.com/patent/US5447401A

## CPC

- B60R 13/0206: {Arrangements of fasteners and clips specially adapted for attaching inner vehicle liners or mouldings (devices for fastening or securing F16B)}
- F16B 25/0031: {the screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts}
- F16B 25/0073: {characterised by its pitch, e.g. a varying pitch}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- 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 is formed with an elongated threaded portion defined by a central shank and a thread formed on the shank, a neck collinear with the shank, and a head provided with a recess adapted to receive a tool for rotating the fastener. The shank of the threaded portion includes a cylindrical body and a tapered penetrating point extending longitudinally from the body. The thread is provided with a constant diameter section along the cylindrical body and a tapered section along the tapered penetrating point. The constant diameter section defines a major diameter that is more than about double the minor diameter defined by the body of the shank. The thread defines a pitch greater than the cross-sectional thickness of the thread along the shank so that the cylindrical shank is exposed within each pitch of the thread.

## Claims

### Claim 1

A fastener for securing a structural component of a first predetermined thickness to a carpet pad having a second predetermined thickness, the fastener comprising:
an elongated threaded portion having a length less than the predetermined thickness of the carpet pad and being defined by a central shank and a thread formed on the shank;
the shank including a cylindrical body and a tapered penetrating point extending longitudinally from the body, the cylindrical body defining a minor diameter; the thread including a constant diameter section along the cylindrical body and a tapered section along the tapered penetrating point, the constant diameter section defining a major diameter that is more than about double the minor diameter;
the thread defining a pitch greater than the cross-sectional thickness of the thread along the shank so that the cylindrical shank is exposed within each pitch of the thread;
a neck collinear with the shank and having a length adapted to correspond to the thickness of the structural component to be fastened to the carpet pad, the neck including a diameter greater than the diameter of the shank and less than the diameter of the thread; and
a head collinear with the shank and including a diameter greater than the diameter of the neck, and a distal face provided with a recess adapted to receive a tool for rotating the fastener into the carpet pad.

### Claim 2 (depends on 1)

A fastener as recited in claim 1, wherein the minor diameter is about 0.140 inches and the major diameter is about 0.186 inches.

### Claim 3 (depends on 1)

A fastener as recited in claim 1, wherein the pitch is 6 threads per inch along the length of the shank.

### Claim 4 (depends on 1)

A fastener as recited in claim 1, wherein the neck has a length of 0.200 inches and a diameter of about 0.186 inches.

### Claim 5 (depends on 1)

A fastener as recited in claim 1, wherein the thread includes a pair of opposed thread surfaces intersecting at a crest, the surfaces being angled relative to one another by a angle of about 45.degree..

### Claim 6 (depends on 1)

A fastener as recited in claim 1, wherein the point defines a point angle of about 45.degree..