# US 8,769,921 B2 · Method and device for protecting the end of an anchored cable

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,769,921 B2
- Document ID: US8769921B2
- Status: Granted
- Kind: B2
- Application number: 13/440,327
- Filed: 2012-04-05
- Published: 2012-10-11
- Granted: 2014-07-08
- Earliest claimed: 2011-04-07
- Assignees: Soletanche Freyssinet
- Applicants: Stephane Joye; Yannick Le Goff
- Inventors: Stephane Joye; Yannick Le Goff
- Web page: https://patentgrep.com/patent/US8769921B2

## CPC

- E04C 5/122: {the tensile members are anchored by wedge-action}
- E01D 19/14: Towers; Anchors {; Connection of cables to bridge parts}; Saddle supports
- E01D 19/16: Suspension cables; Cable clamps for suspension cables {; Pre- or post-stressed cables}
- E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
- E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005})

## Abstract

To protect the end of a cable composed of a set of tendons individually held in an anchorage system, the device comprises a skirt extending from the front of the anchorage system and placed around the set of tendons, and several sleeves. The tendons have respective end portions which extend beyond the front of the anchorage system and which are individually received in the sleeves, said sleeves being sealed off beyond the end portions of the tendons. A connection between the skirt and the sleeves encloses a chamber delimited by the front of the anchorage system, the skirt, and the sleeves, the connection comprising an active stuffing box kind of system. The volume of this chamber is filled in with a filling product.

## Claims

### Claim 1

A device for protecting an end of a cable, the cable comprising a set of tendons individually held in an anchorage system, the tendons having respective end portions which extend beyond a front side of the anchorage system, said device comprising:
a skirt extending from the front side of the anchorage system and placed around the set of tendons;
a plurality of sleeves, each sleeve being placed around at least one respective tendon of the cable and being sealed off beyond the end portion of said tendon;
a connection between the skirt and the sleeves, to enclose a chamber delimited by the front side of the anchorage system, the skirt, and the sleeves, said connection comprising an active stuffing box system; and
a filling product to fill in an internal volume of the chamber.

### Claim 2 (depends on 1)

The device of claim 1, wherein each sleeve contains a single tendon of the cable.

### Claim 3 (depends on 1)

The device of claim 1, wherein the sleeves are less rigid than the tendons of the cable.

### Claim 4 (depends on 1)

The device of claim 1, wherein the sleeves are less rigid than the skirt.

### Claim 5 (depends on 1)

The device of claim 1, wherein the stuffing box system comprises three parallel plates traversed by holes arranged to allow the sleeves to pass through, two of them being rigid plates sandwiching a deformable plate, one of the rigid plates being peripherally connected to the skirt, the stuffing box system further comprising an actuating mechanism for pressing the two rigid plates towards each other and thus compressing the deformable plate between them to form a seal along the sleeve passage.

### Claim 6

A method for protecting an end of a cable, the cable comprising a set of tendons individually held in an anchorage system, the tendons having respective end portions which extend beyond a front side of the anchorage system, the method comprising:
installing a skirt against the front side of the anchorage system, placing the skirt around the set of tendons;
installing a plurality of sleeves, each sleeve being placed around at least one respective tendon of the cable and being sealed off beyond the end portion of said tendon;
connecting the sleeves to the skirt with an active stuffing box system, to enclose a chamber delimited by the front side of the anchorage system, the skirt, and the sleeves; and
injecting a filling product to fill in an internal volume of the chamber.

### Claim 7 (depends on 6)

The method of claim 6, wherein each sleeve is placed around a single tendon of the cable.

### Claim 8 (depends on 6)

The method of claim 6, wherein the sleeves contain soft or pliable filling product before they are installed onto the end portions of the cable tendons.

### Claim 9 (depends on 6)

The method of claim 6, wherein the sleeves are less rigid than the cable tendons and/or the skirt.