# US 7,607,643 B1 · Fairlead

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- Number: US 7,607,643 B1
- Document ID: US7607643B1
- Status: Granted
- Kind: B1
- Application number: 12/006,500
- Filed: 2008-01-03
- Granted: 2009-10-27
- Earliest claimed: 2008-01-03
- Assignees: Anvil Attachments
- Inventors: Gary Box; Jon Craft
- Web page: https://patentgrep.com/patent/US7607643B1

## CPC

- E02F 3/58: Component parts {(E02F9/14, E02F3/905 take precedence)}
- B66D 3/04: Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage (sheaves F16H55/00)
- B66D 3/08: Arrangements of sheaves
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- B66D: CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B)

## Abstract

An improved fairlead for efficiently guiding a cable as it is wound on to or off of a drum. The improved fairlead reduces operation and labor concerns by decreasing cable wear and increasing cable life.

## Claims

### Claim 1

An apparatus comprising:
a. a housing;
b. a drum mounted on the housing;
c. a cable wound around the drum, whereby when the drum is actuated, the cable can be wound onto or wound off of the drum;
d. a tool positioned forward of the drum, the tool being operable via the cable; and
e. a fairlead positioned on the tool for guiding the cable when the cable is wound onto or wound off of the drum, wherein the fairlead comprises a frame and a plurality of rollers rotatably mounted on the frame, wherein each roller has an axis of rotation and at least one substantially concave face that is substantially parallel to the axis of rotation, and wherein the rollers are positioned adjacent to each other to form a substantially circular, corner-free aperture for the passage of the cable.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein the plurality of rollers comprises at least four rollers.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein the frame comprises a platform having a plurality of brackets mounted thereupon.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein one of the plurality of rollers is transversely mounted between each bracket.

### Claim 5 (depends on 1)

The apparatus according to claim 1, wherein the axis of rotation is generally horizontal.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein each roller further comprises two faces that are substantially perpendicular to the axis of rotation.

### Claim 7 (depends on 1)

The apparatus according to claim 1, wherein the rollers are positioned at approximately right angles to each other.

### Claim 8 (depends on 1)

The apparatus according to claim 1, wherein the substantially concave face comprises an arc of approximately 90 degrees.

### Claim 9

An excavating or material handling machine comprising:
a. a housing;
b. a drum mounted on the housing;
c. a boom extending from the housing;
d. an excavating or material handling tool suspended from the boom;
e. a cable wound around the drum, whereby when the drum is actuated, the cable can be wound onto or wound off of the drum to move the excavating tool toward and away from the housing; and
f. a guide assembly mounted on the excavating or material handling tool for guiding the cable when the cable is wound onto or wound off of the drum, wherein
the guide assembly comprises a frame and plurality of rollers rotatably mounted in the frame,
each of the rollers has an axis of rotation and at least one face that is substantially parallel to the axis of rotation,
the at least one face is substantially concave, and
the rollers are positioned adjacent to each other to form a substantially circular, corner-free aperture, for the passage of the cable.