# US 7,607,840 B2 · Tactical flexible fibre optic splice enclosure and method of installation

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- Number: US 7,607,840 B2
- Document ID: US7607840B2
- Status: Granted
- Kind: B2
- Application number: 11/759,522
- Filed: 2007-06-07
- Published: 2007-12-27
- Granted: 2009-10-27
- Earliest claimed: 2006-06-07
- Inventors: Eric Martin
- Web page: https://patentgrep.com/patent/US7607840B2

## CPC

- G02B 6/2558: {Reinforcement of splice joint}
- G02B 6/4489: {of central supporting members of lobe structure}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present invention relates to fibre optics and more particularly to flexible, durable, fibre optic splices, and methods of installing such splices. One embodiment of the invention comprises a fibre optic splice comprising: a flexible central tensile member; a flexible helical wrapping positioned about the flexible central tensile member; and an outer protective jacket positioned about the flexible helical wrapping. The flexible central tensile member and the flexible helical wrapping define a splice enclosure to accommodate optical fibres of the splice, at least a portion of the optical fibres being arranged in a generally helical orientation within the splice enclosure.

## Claims

### Claim 1

A fibre optic splice comprising:
a flexible central tensile member;
a flexible helical wrapping positioned about said flexible central tensile member; and
an outer protective jacket positioned about said flexible helical wrapping;
said flexible central tensile member and said flexible helical wrapping defining a splice enclosure to accommodate optical fibres of said splice, at least a portion of said optical fibres being arranged in a generally helical orientation within said splice enclosure; and
a pair of cable bonding clamps, one mounted at each end of said flexible central tensile member, and means for connecting each of said cable bonding clamps to the central strength member of a cable being spliced.

### Claim 2 (depends on 1)

The fibre optic splice of claim 1 wherein said flexible central tensile member contracts when stretched, providing additional space for said optical fibres.

### Claim 3 (depends on 1)

The fibre optic splice of claim 1 further comprising a splice sleeve /cover combination to protect optical splices.

### Claim 4 (depends on 3)

The fibre optic splice of claim 3 wherein said splice sleeve comprises a central bore allowing said flexible central tensile member to pass through.

### Claim 5 (depends on 3)

The fibre optic splice of claim 3 wherein said splice sleeve comprises channels running axially along its outer surface, equally spaced apart, and sized to accommodate a spliced optical fibre.

### Claim 6 (depends on 3)

The fibre optic splice of claim 3 wherein said splice sleeve comprises external threads to matingly engage with internal threads of said cover.

### Claim 7 (depends on 3)

The fibre optic splice of claim 3 wherein said cover comprises a knurled / cross-hatched outside surface to facilitate tightening by hand.

### Claim 8 (depends on 1)

The fibre optic splice of claim 1 wherein said outer protective jacket comprises an adhesive-lined heat shrink jacket.

### Claim 9 (depends on 1)

The fibre optic splice of claim 1 further comprising heat shrink sleeves to secure an outer jacket of said cable to said cable bonding clamps.

### Claim 10 (depends on 1)

The fibre optic splice of claim 1 fabricated using non-sparking materials.

### Claim 11 (depends on 1)

The fibre optic splice of claim 1 fabricated using corrosion resistant materials.

### Claim 12 (depends on 1)

The fibre optic splice of claim 1 fabricated using non-magnetic materials.

### Claim 13 (depends on 1)

The fibre optic splice of claim 1 fabricated using non-electrical conducting materials.

### Claim 14 (depends on 1)

The fibre optic splice of claim 1 fabricated using materials which remain flexible over a temperature range of −70° C. to 100° C.

### Claim 15 (depends on 1)

The fibre optic splice of claim 1 fabricated using fire-resistant materials.

### Claim 16 (depends on 1)

The fibre optic splice of claim 1 wherein said cable bond clamps are secured to said cable central strength member with set screws.

### Claim 17

A method of splicing a fibre optic cable having a central strength member and optical fibres comprising the steps of:
providing a pair of cable bonding clamps, one mounted at each end of a flexible central tensile member, and connecting each of said cable bonding clamps to a central strength member of the fibre optic cable being spliced;
arranging at least a portion of the optical fibres being spliced, in a generally helical orientation about the flexible central tensile member;
positioning a flexible helical wrapping about said optical fibres and said flexible central tensile member, said flexible central tensile member and said flexible helical wrapping defining a splice enclosure to accommodate said optical fibres being spliced; and
positioning an outer protective jacket about said flexible helical wrapping and said cable bonding clamps.