# US 9,882,331 B2 · Low cost gold wire brushes

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- Number: US 9,882,331 B2
- Document ID: US9882331B2
- Status: Granted
- Kind: B2
- Application number: 13/960,116
- Filed: 2013-08-06
- Published: 2014-02-06
- Granted: 2018-01-30
- Earliest claimed: 2012-08-06
- Assignees: Schleifring and Apparatebau GmbH
- Applicants: Schleifring and Apparatebau GmbH
- Inventors: Max Winkler; Christian Holzapfel
- Web page: https://patentgrep.com/patent/US9882331B2

## CPC

- H01R 39/24: Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
- H01R 39/20: characterised by the material thereof
- H01R 43/12: Manufacture of brushes
- H01R 13/33: Contact members made of resilient wire
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A slipring brush includes a body of a metal wire or metal band having a contact area for contacting a slipring module. The contact area is selectively coated by a contact material like gold or silver or an alloy thereof. The body preferably includes Copper, Nickel, Iron, or an alloy thereof. Coating may be done by electroplating, physical vapor deposition (PVD) or chemical vapor deposition (CVD).

## Claims

### Claim 1

A slipring brush comprising:
a body of a metal wire having a contact area for contacting a slipring module, wherein the contact area of the metal wire is electroplated with at least one contact material, and the metal wire is elongated and has a circular cross-section.

### Claim 2 (depends on 1)

The Slipring brush according to claim 1, wherein the contact material is nobler than the material of the body.

### Claim 3 (depends on 1)

The Slipring brush according to claim 1, wherein the contact material is tribologically favorable.

### Claim 4 (depends on 3)

The Slipring brush according to claim 3, wherein the contact material has a low contact resistance.

### Claim 5 (depends on 1)

The Slipring brush according to claim 1, wherein the contact material has a low contact resistance.

### Claim 6 (depends on 1)

The Slipring brush according to claim 1, wherein the contact material includes gold, silver, platinum, palladium, rhodium, or an alloy thereof.

### Claim 7 (depends on 1)

The Slipring brush according to claim 1, wherein the body material has at least one of: good spring properties, good thermal conductivity, and/or good electrical conductivity.

### Claim 8 (depends on 1)

The Slipring brush according to claim 1, wherein the body material is one of copper, nickel or iron alloys.

### Claim 9 (depends on 1)

A slipring brush block comprising at least one slipring brush according to claim 1.

### Claim 10 (depends on 9)

A slipring assembly comprising at least one slipring brush block according to claim 9.

### Claim 11 (depends on 1)

A method of manufacturing a slipring brush according to claim 1, comprising:
providing a body of a metal wire or metal band, and
coating at least one section of the body.

### Claim 12 (depends on 11)

The method of claim 11, further comprising:
coating at least one end of the body.

### Claim 13 (depends on 11)

The method of claim 11, wherein coating includes at least one of electroplating, PVD, CVD or a combination thereof.

### Claim 14 (depends on 11)

The method of claim 11, further including the additional step of: bending the slip ring brush.