Fiber optic cable crimp assemblies employing integrally connected cable strain relief boots, and related fiber optic connectors, cables, and methods

• US 9,429,732 B2
• Filed: 05/03/2013
• Issued: 08/30/2016
• Est. Priority Date: 05/03/2013
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Schroeder, William Michael, Ahmed, Izhar Zahoor, Henke, Charles Todd, Parkman, Louis Edward III, Vasudeo, Nikhil Baburam
• Primary Examiner(s): Wong, Tina
• Application Number:
  US13/886,890
• Publication Number:
  US 20140328560A1
• Time in Patent Office: 1,215 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/4471 Terminating devices demountable connectors G02B6/3807; Cable clamps
• CPC Class Codes: G02B 6/4477 with means for strain-relieving to interior strengths element

Abstract

Embodiments disclosed herein include fiber optic cable crimp assemblies employing integrally connected cable strain relief boots to provide a single component crimp assembly. Related fiber optic connectors, cables, and methods are also disclosed. A fiber optic cable crimp assembly is employed for securing a fiber optic connector assembly to a fiber optic cable to form a terminated fiber optic connector. The fiber optic cable crimp assembly includes a cable strain relief boot configured to receive an end portion of a fiber optic cable to provide bend and strain relief for the end portion of the fiber optic cable. A fiber optic cable crimp band is integrally connected to the cable strain relief boot. The fiber optic crimp assembly is further configured to secure the end portion of the fiber optic cable to a fiber optic connector assembly.

Claims

1. A connectorized fiber optic cable assembly, comprising:

a fiber optic connector sub-assembly having a front end and a rear end;

a fiber optic cable crimp assembly comprising;

a cable strain relief boot having a front end and a rear end; and

a fiber optic cable crimp band having a front end and a rear end, the rear end of the fiber optic cable crimp band integrally connected to the front end of the cable strain relief boot; and

a fiber optic cable having an end portion inserted through the rear end of the cable strain relief boot, wherein;

the cable strain relief boot provides bend and strain relief for the end portion of the fiber optic cable;

the fiber optic cable crimp band is crimped about the end portion of the fiber optic cable and about the fiber optic connector sub-assembly such that the end portion of the fiber optic cable is secured to the fiber optic connector sub-assembly;

the cable strain relief boot includes an integral gasket portion extending into the rear end of the fiber optic cable crimp band along an interior surface of the fiber optic cable crimp band; and

the gasket portion is compressed around an outer jacket of the fiber optic cable for securing the fiber optic cable to the fiber optic connector sub-assembly.

2. The connectorized fiber optic cable assembly of claim 1, wherein the rear end of the fiber optic cable crimp band is mechanically connected to the front end of the cable strain relief boot.

3. The connectorized fiber optic cable assembly of claim 1, wherein the front end of the cable strain relief boot is overmolded over at least a portion of the rear end of the fiber optic cable crimp band.

4. The connectorized fiber optic cable assembly of claim 3, wherein the rear end of the fiber optic cable crimp band is covered entirely by the front end of the cable strain relief boot.

5. The connectorized fiber optic cable assembly of claim 3, wherein at least a second portion of the rear end of the fiber optic cable crimp band is exposed via at least one orifice in the cable strain relief boot.

6. The connectorized fiber optic cable assembly of claim 1, wherein the front end of the cable strain relief boot is integrally connected to the fiber optic cable crimp band by interfacing with at least one recess in the fiber optic cable crimp band.

7. The connectorized fiber optic cable assembly of claim 6, wherein the at least one recess in the fiber optic cable crimp band comprises at least one throughhole, thereby forming an integral mechanical connection between the fiber optic cable crimp band and the cable strain relief boot.

8. The connectorized fiber optic cable assembly of claim 6, wherein the at least one recess in the fiber optic cable crimp band comprises at least one groove.

9. The connectorized fiber optic cable assembly of claim 1, wherein the rear end of the fiber optic cable crimp band is flared with respect to the front end of the fiber optic cable crimp band.

10. The connectorized fiber optic cable assembly of claim 9, wherein a radius of the flared rear end of the fiber optic cable crimp band is larger than a radius of the front end of the fiber optic cable crimp band.

11. The connectorized fiber optic cable assembly of claim 1, further comprising a connection portion attached to the rear end of the fiber optic cable crimp band, wherein the front end of the cable strain relief boot is integrally connected to the fiber optic cable crimp band by interfacing with the connection portion.

12. The connectorized fiber optic cable assembly of claim 11, wherein the connection portion is formed from a different material than the fiber optic cable crimp band.

13. The connectorized fiber optic cable assembly of claim 1, wherein an end portion of at least one internal strength member of the fiber optic cable is compressed between a front portion of the interior surface of the fiber optic cable crimp band and a first end portion of the fiber optic connector sub-assembly for securing the fiber optic cable to the fiber optic connector sub-assembly.

14. The connectorized fiber optic cable assembly of claim 13, wherein the outer jacket of the fiber optic cable is compressed between an inner surface of the gasket portion and a second end portion of the fiber optic connector sub-assembly for securing the fiber optic cable to the fiber optic connector sub-assembly.

15. A method of assembling a terminated fiber optic connector assembly, comprising:

providing a fiber optic connector sub-assembly having a front end and a rear end;

providing a fiber optic cable crimp assembly comprising;

a cable strain relief boot having a front end and a rear end, wherein the cable strain relief boot also includes an integral gasket portion extending into the rear end of the fiber optic cable crimp band along an interior surface of the fiber optic cable crimp band; and

a fiber optic cable crimp band having a front end and a rear end, the rear end of the fiber optic cable crimp band integrally connected to the front end of the cable strain relief boot;

inserting an end portion of a fiber optic cable through the rear end of the cable strain relief boot such that the cable strain relief boot provides bend and strain relief for the end portion of the fiber optic cable; and

crimping the fiber optic cable crimp band about the end portion of the fiber optic cable and about the fiber optic connector sub-assembly such that the end portion of the fiber optic cable is secured to the fiber optic connector sub-assembly, wherein the gasket portion of the cable strain relief boot is compressed around an outer jacket of the fiber optic cable for securing the fiber optic cable to the fiber optic connector sub-assembly.