# US 2014/0193222 A1 · Screw

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- Number: US 2014/0193222 A1
- Document ID: US20140193222A1
- Status: Published application
- Kind: A1
- Application number: 14/127,229
- Filed: 2013-03-25
- Published: 2014-07-10
- Earliest claimed: 2012-04-24
- Assignees: Nedschroef Fraulautern GmbH
- Applicants: Nedschroef Fraulautern GmbH
- Inventors: Jean Joseph Egele; Joerg Michael Wendels
- Web page: https://patentgrep.com/patent/US20140193222A1

## CPC

- F16B 25/00: Screws that cut thread in the body into which they are screwed, e.g. wood screws {(F16B35/065 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275, using screws with adjustment sleeves F16B5/0283)}
- 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

The invention relates to a self-tapping screw (1) consisting of a low-strength non-ferrous material, having a screw body (3) which is provided, at least in regions, with a coating (5), wherein the coating (5) is formed from an elastomer or polymer material enriched with fillers.

## Claims

### Claim 1

Self-tapping screw (1) consisting of a low-strength non-ferrous material, having a screw body (3) that is provided with a coating (5), at least on some regions, wherein the coating (5) is formed from an elastomer or polymer material enriched with fillers.

### Claim 2 (depends on 1)

Screw according to claim 1, wherein the screw body (3) has a trilobular cross-section.

### Claim 3 (depends on 1)

Screw according to claim 1, wherein the screw material is aluminum or magnesium or an alloy of one of these materials.

### Claim 4 (depends on 1)

Screw according to claim 1, wherein the coating (5) has a lesser hardness than the screw material.

### Claim 5 (depends on 1)

Screw according to claim 1, wherein the coating (5) is formed from a nanocomposite material.

### Claim 6 (depends on 5)

Screw according to claim 5, wherein the nanocomposite material is an acrylate or silicate composite material.