Multifiber invisible optical drop cable and methods for routing optical fibers within a multi-dwelling unit

Patent metadata

Field	Value
Publication number	US-11740425-B2
Application number	US-202017038350-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Oct 23, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The present disclosure relates to a process by which an optical fiber drop cable is created and routed in a multiple dwelling unit (“MDU”). The optical fiber drop cable is formed with a feeding tool, and the optical fiber drop cable includes a tube having optical fibers enclosed within the tube. The feeding tool creates a slit within the tube through which optical fibers are fed and thereby inserted into the tube along the tube's length. Once the tube exits the feeding tool with the optical fibers enclosed (thereby forming the optical fiber drop cable), the optical fiber drop cable is then routed into an individual dwelling unit of the MDU by a transition assembly including a transition plug and a routing plug that leads an optical fiber from an exterior of the individual dwelling unit to a subscriber termination point in an interior of the individual dwelling unit.

First claim

What is claimed is:

1. A method of preparing and routing a plurality of optical fibers within a multiple dwelling unit (“MDU”), the method comprising:
preparing an optical fiber drop cable by:
creating a slit along a length of a tube; and
directing the plurality of optical fibers through the slit such that the plurality of optical fibers extend within the tube along the length;

arranging a transition plug on the optical fiber drop cable at a first location by:
extending the optical fiber drop cable through a routing channel that extends through the transition plug, wherein the transition plug also includes a transition channel that communicates with the routing channel; and
extracting at least one optical fiber from within the tube using the slit and extending the at least one optical fiber through the transition channel of the transition plug;

routing the at least one optical fiber from the transition plug into a first dwelling unit of the MDU by extending the at least one optical fiber through a wall of the MDU; and
mounting the transition plug to an exterior side of the wall of the MDU;
wherein preparing the optical fiber drop cable further comprises:
inserting the plurality of optical fibers into a first portion of a feeding tool;
inserting the tube into a second portion of a feeding tool; and
causing relative movement between the tube and the feeding tool so that a blade of the feeding tool creates the slit along the length of the tube, wherein the feeding tool directs the plurality of optical fibers through the slit and into the tube during the relative movement.

2. The method of claim 1 , wherein:
routing the at least one optical fiber from the transition plug into the first dwelling unit of the MDU comprises extending the at least one optical fiber through a routing plug secured to the wall; and
mounting the transition plug to the exterior of the wall comprises coupling the transition plug to the routing plug to form a transition assembly that traverses the wall and provides a pathway for the at least one optical fiber from the exterior side of the wall to the interior side of the wall.

3. The method of claim 2 , wherein the routing plug includes an entry channel extending from the interior side of the wall, and wherein the entry channel communicates with the transition channel of the transition plug when the transition assembly is formed.

4. The method of claim 2 , wherein routing the at least one optical fiber from the transition plug into the first dwelling unit of the MDU is performed before coupling the transition plug to the routing plug.

5. The method of claim 1 , wherein the transition plug arranged at the first location on the optical fiber drop cable is a first transition plug, the at least one optical fiber routed into the first dwelling unit is at least one first optical fiber, and the wall of the MDU is a first wall, the method first comprising:
arranging a second transition plug on the optical fiber drop cable at a second location, wherein the second transition plug is similar to the first transition plug and arranged on the optical fiber drop cable in a similar manner such that, after arranging the second transition plug, at least one second optical fiber is extracted through the slit of the tube and extends through the transition channel of the second transition plug; and
routing the at least one second optical fiber from the second transition plug into a second dwelling unit of the MDU by extending the at least one second optical fiber through the first wall of the MDU or a different wall of the MDU.

6. The method of claim 1 , wherein the feeding tool further includes a wedge structure configured to engage with the tube and open the slit of the tube such that the plurality of optical fibers can be directed through the slit.

7. The method of claim 6 , wherein the feeding tool includes a front aperture and a rear aperture between which passage is defined, wherein the wedge structure is proximate the front aperture.

8. The method of claim 6 , wherein the wedge structure is integrally formed with a body of the feeding tool.

Assignees

• Corning Res & Dev Corp

Inventors

• Faraj Patrick
• Kusmierek Marcin
• Mueller-Schlomka Gordon

Classifications

• G02B6/4466 Primary

  Physics · mapped topic

• G02B6/4473

  Three-way systems · CPC title

• G02B6/4495

  Physics · mapped topic

• G02B6/50

  Underground or underwater installation; Installation through tubing, conduits or ducts · CPC title

• G02B6/4475

  with provision for lateral branching (G02B6/4431 takes precedence) · CPC title