# US 7,607,233 B2 · Cutting wire for brush cutters and edge trimmers

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- Number: US 7,607,233 B2
- Document ID: US7607233B2
- Status: Granted
- Kind: B2
- Application number: 10/488,629
- Filed: 2001-09-03
- Published: 2005-02-10
- Granted: 2009-10-27
- Earliest claimed: 2001-09-03
- Assignees: Speed France
- Inventors: Emmanuel Legrand
- Web page: https://patentgrep.com/patent/US7607233B2

## CPC

- A01D 34/4168: {Constructional details of the flexible lines}
- Y10T 428/2976: Longitudinally varying
- Y10T 428/2978: Surface characteristic
- A01D: HARVESTING; MOWING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a cutting wire (2) which is designed to trim or cut vegetation and which can be used on rotating head devices, such as brush cutters and edge trimmers. The external surface of the cutting wire is provided with tooth-type (5) or similar formations along the length of said wire (2). In the case of a wire having one or more longitudinal cutting edges (4), said tooth-type formations (5) are disposed on the cutting edge(s) along the length of each edge (4). In this way, the sharpness of the wire (2) is improved.

## Claims

### Claim 1

A cutting wire adapted for use on brush cutters and edge trimmers, comprising:
a central body with a round section,
at least one longitudinal cutting edge arranged on the external part or periphery of the wire, wherein said at least one cutting edge has substantially flat faces, and
teeth integrally formed on said cutting edge,
wherein each tooth consists of a portion of the cutting edge located between two successive concave rounded profiles, wherein said concave rounded profiles intersect said flat faces so as to form sharp angles,
said teeth being substantially shorter than the rounded profiles in a longitudinal direction of the cutting wire,
and wherein a thickness at the bottom of the concave rounded profiles in a direction perpendicular to the longitudinal direction is greater than a thickness of the teeth at a free end thereof in said direction perpendicular to the longitudinal direction.

### Claim 2

A cutting wire adapted for use on brush cutters and edge trimmers, comprising:
a central body with a round section,
at least one longitudinal cutting edge arranged on the external part or periphery of the wire, wherein said at least one cutting edge has substantially flat faces, and
teeth integrally formed on said cutting edge,
wherein each tooth consists of a portion of the cutting edge located between two successive concave rounded profiles so as to space said two successive concave rounded profiles apart in a longitudinal direction of the cutting wire, wherein said concave rounded profiles intersect said flat faces so as to form sharp angles,
said teeth being substantially shorter than the rounded profiles in the longitudinal direction of the cutting wire.

### Claim 3

A cutting wire adapted for use on brush cutters and edge trimmers, comprising:
a central body with a round section,
at least one longitudinal cutting edge arranged in the external part or periphery of the wire, and
teeth integrally formed on the at least one cutting edge and consisting of successive substantially flat lands separated by concave rounded profiles,
wherein said at least one cutting edge has substantially flat faces and wherein the flat lands and the concave rounded profiles intersect said flat faces so as to form sharp angles.

### Claim 4 (depends on 3)

The cutting wire according to claim 3, comprising four longitudinal cutting edges arranged crosswise in the external part or periphery of the wire.

### Claim 5 (depends on 4)

The cutting wire according to claim 4, wherein teeth formed on each cutting edge are located at different longitudinal positions on each cutting edge.

### Claim 6 (depends on 4)

The cutting wire according to claim 4, wherein teeth formed on each cutting edge are located in corresponding longitudinal positions on each cutting edge.

### Claim 7 (depends on 3)

The cutting wire according to claim 3, wherein the substantially flat lands are shorter than the rounded profiles in a longitudinal direction of the cutting wire.