Fiber optic distribution cables and structures therefor

Patent metadata

Field	Value
Publication number	US-9494764-B2
Application number	US-201615135777-A
Country	US
Kind code	B2
Filing date	Apr 22, 2016
Priority date	May 11, 2006
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A fiber optic distribution cable includes a jacket defining an exterior of the fiber optic distribution cable and a plurality of optical fibers extending through a cavity of the jacket. The jacket has an access location with a single opening formed in the jacket that extends to the cavity. A distribution optical fiber of the plurality of optical fibers extends through and protrudes from the single opening in the jacket at the access location and is secured by a demarcation point.

First claim

What is claimed is:

1. A fiber optic distribution cable assembly, comprising:
a fiber optic distribution cable having a jacket defining a cavity therein with an access location defined by a single opening formed in the jacket that extends to the cavity, and a plurality of optical fibers extending through the cavity of the jacket, the plurality of optical fibers comprising a distribution optical fiber that includes a severed optical fiber that extends through and protrudes from the single opening in the jacket at the access location, the distribution optical fiber having an end that would extend to, but not beyond, a cutting location within the cavity of the jacket if inserted through the single opening and into the cavity, the cutting location being spaced apart from the single opening along the distribution cable at a position where the jacket is not breached; and
a demarcation point provided at the access location for generally inhibiting the movement of the distribution optical fiber at or near the access location.

2. The fiber optic distribution cable assembly of claim 1 , wherein the single opening is a slot.

3. The fiber optic distribution cable assembly of claim 2 , wherein the slot extends lengthwise along the jacket.

4. The fiber optic distribution cable assembly of claim 1 , wherein a fusion splice connects an optical fiber pigtail to the distribution optical fiber.

5. The fiber optic distribution cable assembly of claim 4 , wherein the splice is protected by a splice protector.

6. The fiber optic distribution cable assembly of claim 1 , wherein the demarcation point comprises a suitable material injected about the distribution optical fiber at the access location.

7. The fiber optic distribution cable assembly of claim 6 , wherein the suitable material includes a hot melt adhesive or silicone.

8. The fiber optic distribution cable assembly of claim 1 , further comprising strength members that provide tensile and anti-buckling strength to the distribution cable, wherein the strength members are disposed on opposite sides of the cavity and impart a preferential bend characteristic to the distribution cable.

9. The fiber optic distribution cable assembly of claim 8 , wherein the strength members are glass-reinforced plastic rods having a round cross-section with a diameter that is less than the height of the cavity.

10. The fiber optic distribution cable assembly of claim 7 , wherein the distribution cable has a dry construction such that the cable excludes a grease or gel for water-blocking, wherein the distribution cable includes water-swellable components for water-blocking.

11. The fiber optic distribution cable assembly of claim 10 , wherein the water-swellable components comprise a water-swellable layer of an elongate tape.

12. The fiber optic distribution cable assembly of claim 1 , wherein the length of the distribution optical fiber protruding from the single opening in the jacket is at least 5/4 times longer than the length of the single opening.

13. The fiber optic distribution cable assembly of claim 1 , wherein the distribution optical fiber is one of a set of optical fibers protruding from the single opening, and wherein the set of optical fibers are from a fiber optic ribbon having a splittable construction that is carried by the distribution cable and the set of optical fibers are less than all of the optical fibers of the fiber optic ribbon.

14. The fiber optic distribution cable assembly of claim 1 , wherein the length of the distribution optical fiber protruding from the single opening in the jacket is at least 3/2 times longer than the length of the single opening.

15. The fiber optic distribution cable assembly of claim 14 , wherein the distribution optical fiber is one of a set of optical fibers protruding from the single opening, and wherein the set of optical fibers are from a fiber optic ribbon having a splittable construction that is carried by the distribution cable and the set of optical fibers are less than all of the optical fibers of the fiber optic ribbon.

16. The fiber optic distribution cable assembly of claim 1 , wherein the fiber optic distribution cable has a tubeless design such that the cavity immediately surrounds the plurality of optical fibers without intermediate tubes in the cavity surrounding the plurality of optical fibers.

17. The fiber optic distribution cable assembly of claim 4 , wherein the optical fiber pigtail has a second end with one or more ferrules attached thereto.

18. The fiber optic distribution cable assembly of claim 17 , wherein each ferrule is a portion of a receptacle or plug.

19. The fiber optic distribution cable assembly of claim 17 , wherein the ferrule is a multifiber ferrule.

20. The fiber optic distribution cable assembly of claim 17 , wherein the ferrule is a single fiber ferrule.

Assignees

• Ccs Technology Inc
• Corning Optical Communications LLC

Inventors

• Cody Joseph Todd
• Knecht Dennis Michael
• Lewallen Christopher Paul
• Luther James Phillip

Classifications

• G02B6/4403

  with ribbon structure (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/2551

  using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch · CPC title

• G02B6/2558

  Reinforcement of splice joint · CPC title

• G02B6/4495 Primary

  Physics · mapped topic

• G02B6/44384

  the means comprising water blocking or hydrophobic materials (G02B6/4439, G02B6/4479 take precedence) · CPC title