Guide sleeve for fiber optic cable

• US 5,640,476 A
• Filed: 07/14/1995
• Issued: 06/17/1997
• Est. Priority Date: 07/14/1995
• Status: Expired due to Term

• Current Assignee: Siecor Technology, Inc. (Corning Incorporated)
• Original Assignee: Siecor Corporation (Corning Incorporated)
• Inventors: Kerr, Sean Michael, de Jong, Michael, Womack, Michele Rene
• Primary Examiner(s): Palmer, Phan T. H.
• Application Number:
  US08/502,334
• Time in Patent Office: 704 Days
• Field of Search: 385/86, 385/87, 385/100, 385/83, 385/84, 385/70, 385/76
• US Class Current: 385/86
• CPC Class Codes: G02B 6/4478 Bending relief means

Abstract

A guide sleeve is provided for guiding a portion of a fiber optic cable through a turn and insuring that the turn radius of such portion of the cable does not decrease below the minimum bend radius of the cable. The guide comprises a curved sleeve that has a radius of curvature not less than the minimum bend radius of the fiber optic cable. The sleeve has an interior surface that defines a passageway, and the sleeve defines a slot that communicates with the passageway and extends the entire length of the sleeve such that the sleeve has an open cross-section along the entire length of the sleeve. The slot is configured to allow insertion of a length of a cable through the slot and into the passageway. The slot allows the guide to be removably installed on a cable that already has connectors and boots installed on each end of the cable without affecting the integrity of the connector/boot connection.

Claims

1. A fiber optic cable guide for removable placement on at least one fiber optic cable, the at least one fiber optic cable having a minimum bend radius, the fiber optic cable guide comprising:

a sleeve that is at least partially curved along its length with a radius of curvature not less than the minimum bend radius of the at least one fiber optic cable, the sleeve having a first end and a second end and an interior surface that generally defines a passageway extending from the first end to the second end, the sleeve defining a slot that communicates with the passageway and extends from the first end to the second end such that the sleeve has an open cross-section along the entire length of the sleeve, the slot dimensioned to allow removable insertion of the at least one cable through the slot to be disposed in the passageway.

2. With the at least one fiber optic cable being further defined as terminating at a connector at each end and having a reinforcing boot extending from each connector so that there is a connector and boot connection at each end of the cable, the fiber optic cable guide of claim 1 wherein the slot is configured such that the sleeve can be removably placed on the at least one fiber optic cable without affecting the integrity of the connector and boot connections on the fiber optic cable.

3. The fiber optic cable guide of claim 2 wherein the cross-section of the passageway increases toward the first end of the sleeve such that after one fiber optic cable of the at least one fiber optic cable has been inserted through the slot, the first end of the sleeve can be slidably pressed over at least a portion of the reinforcing boot of the one fiber optic cable.

4. The fiber optic cable guide of claim 3 wherein the first end of the sleeve has an outwardly extending shoulder to facilitate sliding and removal of the first end of the sleeve over at least a portion of the reinforcing boot.

5. The fiber optic cable guide of claim 3 wherein the first end of the sleeve is sufficiently rigid to flex the boot in correspondence with the curve of the passageway as the first end is pressed over the boot.

6. The fiber optic cable guide of claim 1 wherein the sleeve defines cut-outs through the sleeve that are spaced along the sleeve to allow observation of the at least one fiber optic cable when disposed in the passageway.

7. The fiber optic cable guide of claim 1 wherein the slot in the sleeve turns before extending to the second end.

8. The fiber optic cable guide of claim 1 wherein the passageway is configured to allow intentional sliding of the sleeve along the at least one cable.

9. The fiber optic cable guide of claim 1 wherein the sleeve has a generally C-shaped cross-section and the passageway is sized to contain one fiber optic cable.

10. The fiber optic cable guide of claim 1 wherein the sleeve has a generally U-shaped cross-section and the passageway is dimensioned to frictionally receive a length of the at least one cable therein.

11. The fiber optic cable guide of claim 1 wherein the sleeve defines at least one channel transverse to the slot to impart additional flexibility to the sleeve.

12. A method of routing at least one fiber optic cable through a curve, the at least one fiber optic cable having a minimum bend radius, the method comprising the steps of:

(a) placing a length of the at least one fiber optic cable inside a curved sleeve that has a radius of curvature not less than the minimum bend radius of the at least one fiber optic cable, the sleeve having a first end and a second end and having an interior surface that defines a passageway that extends through the length of the sleeve from the first end to the second end, the sleeve defining a slot that communicates with the passageway and extends from the first end to the second end such that the sleeve has an open cross-section along its entire length; and

(b) sliding the sleeve along the at least one fiber optic cable until the curved sleeve is located along the length of the at least one fiber optic cable that is desired to be routed through a curve.

13. With the at least one fiber optic cable being further defined as terminating at a connector at each end and having a reinforcing boot extending from each connector so that there is a connector and boot connection at each end of the cable, the method of claim 12 wherein the slot of the sleeve is configured to allow removable placement of the sleeve on the cable without affecting the integrity of the connector and boot connections.

14. The method of claim 12 wherein the cross-section of the passageway increases toward the first end of the sleeve and wherein the step of sliding the sleeve further comprises pressing the first end of the sleeve over at least a portion of the reinforcing boot of one cable.

15. The method of claim 14 wherein the step of pressing the first end of the sleeve over at least a portion of the reinforcing boot of one cable causes the boot to curve in conformance with the curve of the passageway.

16. A fiber optic cable and guide assembly comprising:

(a) a fiber optic cable having a diameter and an exterior surface, the fiber optic cable having a minimum bend radius;

(b) a guide sleeve that is removably attached about a length of the fiber optic cable, the guide sleeve at least partially curved along its length with a radius of curvature that is not less than the minimum bend radius of the fiber optic cable, the guide sleeve defining a passageway through which the cable is disposed when the guide sleeve is attached about the cable, the passageway dimensioned to allow sliding of the guide sleeve along the cable when the guide sleeve is attached about the cable the guide sleeve having a first end and a second end and having an open cross-section along the entire length of the sleeve from the first end to the second end.

17. The assembly of claim 16 wherein the fiber optic cable terminates at a connector at each end and has a reinforcing boot extending from each connector so that there is a connector and boot connection at each end of the cable, and wherein the sleeve defines a slot extending along the length of the sleeve that communicates with the passageway such that the sleeve has an open cross-section along its entire length, the slot configured to allow the sleeve to be repeatedly removed and installed to the cable without affecting the integrity of the connector and boot connections.

18. The assembly of claim 17 wherein the cross-section of the passageway increases toward the first end of the sleeve and the first end of the sleeve is removably pressed over at least a portion of the reinforcing boot of the fiber optic cable.