# US 2012/0073071 A1 · Interdental brush

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- Number: US 2012/0073071 A1
- Document ID: US20120073071A1
- Status: Published application
- Kind: A1
- Application number: 13/238,829
- Filed: 2011-09-21
- Published: 2012-03-29
- Earliest claimed: 2003-04-22
- Assignees: Curaden International AG
- Inventors: Ueli BREITSCHMID
- Web page: https://patentgrep.com/patent/US20120073071A1

## CPC

- A46B 3/18: the bristles being fixed on or between belts or wires
- A46B 2200/108: Inter-dental toothbrush, i.e. for cleaning interdental spaces specifically
- A46B: BRUSHES (handles not integral with brushware B25G)

## Abstract

In an interdental brush, the filaments are retained between two wire sections (1a, 1b) which are twisted with one another. The wire sections (1a, 1b) have a diameter (D) of 0.3 mm or less and consist of a nickel-free or low-nickel steel. These brushes are distinguished by an increased level of rigidity and an improved restoring force and are stable even if the wire has a small diameter.

## Claims

### Claim 1

Interdental brush comprising:
two wire sections formed of austenitic steel and having a diameter of 0.3 mm or less; and
filaments retained between the two wire sections which are twisted with one another,
wherein the austenitic steel includes less than 0.05% nickel by weight,
wherein the two wire sections have a tensile strength of 1000 N/mm2 or more.

### Claim 2 (depends on 1)

Interdental brush according to claim 1, wherein the two wire sections have a diameter of more than 0.15 mm.

### Claim 3 (depends on 1)

Interdental brush according to claim 1, wherein the two wire sections have a tensile strength of 1200 N/mm2 or less.

### Claim 4 (depends on 1)

Interdental brush according to claim 1, wherein the two wire sections are stretched or drawn out.

### Claim 5 (depends on 2)

Interdental brush according to claim 2, wherein the two wire sections have a tensile strength of 1200 N/mm2 or less.

### Claim 6 (depends on 2)

Interdental brush according to claim 2, wherein the two wire sections are stretched or drawn out.

### Claim 7 (depends on 4)

Interdental brush according to claim 4, wherein the two wire sections are stretched or drawn out.

### Claim 8

Interdental brush comprising:
two wire sections formed of austenitic steel and having a diameter of 0.3 mm or less; and
filaments retained between the two wire sections which are twisted with one another,
wherein the austenitic steel contains manganese, nitrogen, carbon, chromium, molybdenum, silicon, phosphorus, titanium, iron and nickel as alloying constituents and the proportion of nickel in the austenitic steel is less than 0.05% by weight,
wherein the two wire sections have a tensile strength of 1000 N/mm2 or more.

### Claim 9 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of chromium in the steel is 17% by weight, plus or minus 3% by weight.

### Claim 10 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of manganese in the steel is 14% by weight, plus or minus 3% by weight.

### Claim 11 (depends on 9)

Interdental brush according to claim 9, wherein the proportion of manganese in the steel is 14% by weight, plus or minus 3% by weight.

### Claim 12 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of nitrogen in the steel is 0.5% by weight.

### Claim 13 (depends on 9)

Interdental brush according to claim 9, wherein the proportion of nitrogen in the steel is 0.5% by weight.

### Claim 14 (depends on 10)

Interdental brush according to claim 10, wherein the proportion of nitrogen in the steel is 0.5% by weight.

### Claim 15 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of molybdenium in the steel is 2% by weight.

### Claim 16 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of carbon in the steel is 0.11% by weight.

### Claim 17 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of silicon in the steel is 0.25% by weight.

### Claim 18 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of phosphorus in the steel is 0.02% by weight.

### Claim 19 (depends on 8)

Interdental brush according to claim 8, wherein the proportion of titanium in the steel is 0.006% by weight.