Cable termination assembly and method for connectors

Patent metadata

Field	Value
Publication number	US-10036859-B2
Application number	US-201715487678-A
Country	US
Kind code	B2
Filing date	Apr 14, 2017
Priority date	Feb 7, 2012
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

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.

First claim

What is claimed is:

1. A fiber optic connector assembly comprising:
a fiber optic cable including an optical fiber, an outer jacket surrounding the optical fiber, and a strength layer between the optical fiber and the outer jacket;
a connector body defining a front end and a rear end, wherein the connector body defines a plastic front housing and a metallic rear insert coupled to the front housing, wherein the strength layer of the fiber optic cable is anchored to the metallic rear insert with a strength member clamp, wherein a first portion of the strength layer of the fiber optic cable is captured between the strength member clamp and the metallic rear insert and a second portion of the strength layer is folded rearwardly over an exterior of the strength member clamp;
a fiber securement substrate mounted within the metallic rear insert;
a shape recoverable article that secures the optical fiber the fiber securement substrate; and
the optical fiber extending forwardly from the fiber securement substrate through the connector body to the front end of the connector body, wherein a ferrule-less end portion of the optical fiber is accessible at the forward end of the connector body.

2. A fiber optic connector assembly according to claim 1 , wherein the strength member clamp defines a projection extending transversely toward a longitudinal axis of the strength member clamp, the projection configured to be inserted within a notch defined by the metallic rear insert for coupling the strength member clamp to the connector body.

3. A fiber optic connector assembly according to claim 1 , further comprising a heat-recoverable tube placed over the strength member clamp and fixing the strength member clamp relative to the connector body, the heat-recoverable tube covering the first portion of the strength layer that is captured between the strength member clamp and the metallic rear insert and at least partially covering the second portion of the strength layer that is folded rearwardly over the exterior of the strength member clamp.

4. A fiber optic connector assembly according to claim 1 , wherein the connector body defines a fiber buckling region between the front end of the connector body and the metallic rear insert.

5. A fiber optic connector assembly according to claim 4 , 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.

6. A fiber optic connector assembly according to claim 1 , wherein the shape recoverable article is a heat shrink sleeve that can change from an expanded configuration to a compressed configuration by application of heat to the metallic rear insert.

7. A fiber optic connector assembly according to claim 2 , wherein the metallic rear insert of the connector body includes a plurality of the notches and the strength member clamp defines a plurality of the projections configured to fit within the notches.

8. A fiber optic connector assembly according to claim 7 , wherein the strength member clamp defines a complete circular ring with a plurality of fingers extending forwardly, the plurality of fingers defining the projections and configured to flex radially.

9. A fiber optic connector assembly according to claim 7 , wherein the strength member clamp is a split ring.

10. A fiber optic connector assembly according to claim 3 , further comprising a strain relief boot covering the heat-recoverable tube.

11. A fiber optic connector assembly according to claim 3 , wherein the heat-recoverable tube defines a dual-wall construction including a heat-recoverable layer surrounding an adhesive layer.

12. A fiber optic connector assembly according to claim 1 , wherein the strength layer includes aramid yarns.

Assignees

• CommScope Connectivity Belgium BVBA

Inventors

• Daems Daniel Francois
• Verheyden Danny Willy August
• Vos Bart

Classifications

• G02B6/3809 Primary

  without a ferrule embedding the fibre end, i.e. with bare fibre end · CPC title

• G02B6/3887 Primary

  Anchoring optical cables to connector housings, e.g. strain relief features · CPC title

• G02B6/3859

  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 title

• G02B6/4476

  with heat-shrinkable elements · CPC title

• G02B6/3849

  using mechanical protective elements, e.g. caps, hoods, sealing membranes (G02B6/3816 takes precedence; provisionally see H01R13/44) · CPC title