Cable termination assembly and method for connectors

• US 9,268,102 B2
• Filed: 02/06/2013
• Issued: 02/23/2016
• Est. Priority Date: 02/07/2012
• Status: Expired due to Fees

• Current Assignee: Bison Patent Licensing, LLC
• Original Assignee: Tyco Electronics Raychem BVBA (CommScope Holding Company, Inc.)
• Inventors: Daems, Daniel Francois, Verheyden, Danny Willy August, Vos, Bart
• Primary Examiner(s): KIM, ELLEN E
• Application Number:
  US14/376,285
• Publication Number:
  US 20140341511A1
• Time in Patent Office: 1,112 Days
• Field of Search: 385/76, 385 53- 59, 385 70- 71, 385/77
• US Class Current: 1/1
• CPC Class Codes: G02B 6/3809 without a ferrule embedding the fibre end, i.e. with bare fibre end
• CPC Class Codes: G02B 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3859 Ferrules characterised by use of shape memory material [SMM], e.g. heat recoverable polymers, Ti-Ni compounds chemical aspects of SMM see the relevant places under C08 and C22; SMM used for shaping by moulding B29C61/00; SMM for electrical coupling H01R4/01, H01R4/72, H01R12/856, H02G15/1806
• 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 6/3889 using encapsulation for protection, e.g. adhesive, molding or casting resin
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on
• CPC Class Codes: G02B 6/4476 with heat-shrinkable elements

Abstract

The present disclosure relates to a fiber optic connector assembly having a fiber optic connector including a main connector body and a rear insert secured within a rear cable termination end of the main connector body. The fiber optic connector assembly has a fiber optic cable that includes an optical fiber, a strength layer and an outer jacket. The optical fiber has a ferrule-less end portion accessible at a front mating end of the main connector body. A first shape recoverable sleeve secures the optical fiber to a substrate anchored to the rear insert. An axial gap exists between the forward end of the outer jacket and the rearward end of the rear insert. A second shape recoverable sleeve secures the outer jacket to the rear insert. An adhesive material at least partially fills the axial gap.

Claims

1. A fiber optic connector assembly comprising:

a fiber optic connector including a main connector body having a front mating end and a rear cable termination end, the fiber optic connector also including a rear insert secured within the rear cable termination end of the main connector body;

a fiber optic cable including an optical fiber, a strength layer and an outer jacket, the optical fiber extending from the fiber optic cable forwardly through the main connector body and having a ferrule-less end portion accessible at the front mating end of the main connector body, the optical fiber being secured to a fiber securement substrate by a first shape recoverable sleeve, the fiber securement substrate being anchored within the rear insert;

the outer jacket of the fiber optic cable having a forward end and the rear insert having a rearward end, the forward end of the outer jacket being positioned such that an axial gap exists between the forward end of the outer jacket and the rearward end of the rear insert;

a second shape recoverable sleeve that secures the outer jacket to the rear insert, the second shape recoverable sleeve overlapping and being bonded to outer surfaces of the outer jacket and the rear insert, the second shape recoverable sleeve traversing the axial gap; and

adhesive material at least partially filling the axial gap.

2. The fiber optic connector assembly of claim 1, wherein the adhesive material is hot melt adhesive.

3. The fiber optic connector assembly of claim 1, wherein the strength layer includes a forward portion that extends forwardly with respect to the forward end of the outer jacket and is bonded to the adhesive that at least partially fills the axial gap.

4. The fiber optic connector assembly of claim 1, wherein the first shape recoverable sleeve is moved from an expanded configuration to a compressed configuration by heating the rear insert.

5. The fiber optic connector assembly of claim 4, wherein the rear insert is electrically conductive.

6. The fiber optic connector assembly of claim 5, wherein the rear insert is metal.

7. The fiber optic connector assembly of claim 1, wherein the main connector body defines a fiber buckling region between the front mating end of the main connector body and the rear insert.

8. The fiber optic connector assembly of claim 7, wherein the fiber buckling region is configured to take-up at least 0.5 millimeters of excess fiber length without violating minimum bend radius requirements of the optical fiber and without causing unacceptable levels of attenuation.

9. The fiber optic connector assembly of claim 1, wherein the axial gap is 2-5 millimeters in length.

10. The fiber optic connector assembly of claim 3, wherein the forward portion does not extend over the outer surface of the rear insert.

11. A fiber optic connector assembly comprising:

a fiber optic connector including a front plug body having a front mating end and a rear end, the fiber optic connector also including an insert secured within the rear end of the front plug body;

a fiber optic cable including an optical fiber (214), a strength layer and an outer jacket, the optical fiber extending from the fiber optic cable forwardly through the front plug body and having a ferrule-less end portion accessible at the front mating end of the front plug body, the optical fiber being secured to a fiber securement substrate by a first shape recoverable sleeve, the fiber securement substrate being anchored within the insert;

a rear housing having a front end to which the rear end of the front plug body is secured, the insert being positioned at least partially within the front end of the rear housing, the rear housing having an interior chamber;

the outer jacket of the fiber optic cable having a forward jacket end positioned within the interior chamber, and strength layer having a forward end portion that projects forwardly beyond the forward jacket end, the forward end portion being anchored within the interior chamber of the rear housing.

12. The fiber optic connector assembly of claim 11, wherein the forward end portion is adhesively potted within the interior chamber.

13. The fiber optic connector assembly of claim 12, wherein the forward end portion is adhesively potted within the interior chamber by hot melt adhesive.

14. The fiber optic connector assembly of claim 11, further comprising a retention nut rotatably mounted about the rear housing for securing the fiber optic connector within a fiber optic adapter.

15. The fiber optic connector assembly of claim 14, further comprising a sealing member mounted about a periphery of the rear housing for forming a radial seal with the fiber optic adapter.

16. The fiber optic connector assembly of claim 11, further comprising a metal sleeve mounted over the rear housing, and a second heat shrink sleeve adhered to the metal sleeve and the outer jacket of the fiber optic cable.