Preconnectorized fiber optic drop cables and assemblies for efficient deployment

• US 7,090,407 B2
• Filed: 01/27/2004
• Issued: 08/15/2006
• Est. Priority Date: 05/26/2000
• Status: Expired due to Term

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Gimblet, Michael J., Tran, Hieu V., Melton, Stuart R., Liu, Xin, Thompson, David A., Wagman, Richard S.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): WONG, ERIC K
• Application Number:
  US10/765,434
• Publication Number:
  US 20040228589A1
• Time in Patent Office: 931 Days
• Field of Search: 385 78- 80, 385/62, 385/147
• US Class Current: 385/62
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• 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 6/3851 Ferrules having keying or coding means
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/387 Connector plugs comprising two complementary members, e.g. shells, caps, covers, locked together
• CPC Class Codes: G02B 6/3879 Linking of individual connector plugs to an overconnector, e.g. using clamps, clips, common housings comprising several individual connector plugs
• CPC Class Codes: G02B 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448
• 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 6/3894 Screw-lock type
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4405 with longitudinally spaced waveguide clamping G02B6/4429, G02B6/4439, G02B6/4479 take precedence
• CPC Class Codes: G02B 6/4416 Heterogeneous cables
• CPC Class Codes: G02B 6/4429 Means specially adapted for strengthening or protecting the cables
• CPC Class Codes: G02B 6/4433 Double reinforcement laying in straight line with optical transmission element
• CPC Class Codes: G02B 6/44384 the means comprising water blocking or hydrophobic materials G02B6/4439, G02B6/4479 take precedence
• CPC Class Codes: G02B 6/545 Pulling eyes G02B6/475 takes precedence

Abstract

A preconnectorized outdoor cable streamlines the deployment of optical waveguides into the last mile of a optical network. The preconnectorized outdoor cable includes a cable and at least one plug connector. The plug connector is attached to a first end of the cable, thereby connectorizing at least one optical waveguide. The cable has at least one optical waveguide, at least one tensile element, and a cable jacket. Various cable designs such as figure-eight or flat cables may be used with the plug connector. In preferred embodiments, the plug connector includes a crimp assembly having a crimp housing and a crimp band. The crimp housing has two half-shells being held together by the crimp band for securing the at least one tensile element. When fully assembled, the crimp housing fits into a shroud of the preconnectorized cable. The shroud aides in mating the preconnectorized cable with a complimentary receptacle.

Claims

1. A preconnectorized outdoor cable comprising:

at least two strength components having respective tensile strength ratings, an optical transmission component, and at least one tensile strength member having a tensile strength rating disposed generally adjacent to at least one of the strength components, the strength member and one of the strength components defining a tensile strength rating ratio of about 0.1 to about 0.3, and a cable jacket generally surrounding the at least two strength components, the optical transmission component, and the at least one tensile strength member; and

at least one plug connector, the at least one plug connector being attached to an end of the cable, thereby connectorizing an optical waveguide, the optical waveguide being a portion of the optical transmission component, wherein the at least one plug connector includes a crimp housing and a connector assembly, the crimp housing having two half-shells that secure a portion of the connector assembly therebetween where the connector assembly includes a ferrule and a connector housing.

2. The preconnectorized outdoor cable of claim 1, the crimp housing being a portion of a crimp assembly that includes a crimp band for holding the crimp housing together.

3. The preconnectorized outdoor cable of claim 2, the two half-shells having a longitudinal passageway therethrough and at least one cable clamping portion, the at least one cable clamping portion securing one of the at least two strength components of the cable therein.

4. The preconnectorized outdoor cable of claim 1, two half shells having a longitudinal passageway therethrough for routing the at least one optical waveguide to the connector assembly, and the two half-shells being held together by a crimp band.

5. The preconnectorized outdoor cable of claim 1, one of the two half-shells having at least one rib for securing the at least one strength component.

6. The preconnectorized outdoor cable of claim 1, the at least one plug connector further comprising a shroud and the crimp housing is at least partially disposed within the shroud, the shroud having two fingers for mating with a complementary receptacle, wherein the two fingers are disposed about 180 degrees apart and have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

7. The preconnectorized outdoor cable of claim 1, the at least one plug connector further comprising a shroud having a first end and a second end, and a coupling nut.

8. The preconnectorized outdoor cable of claim 7, the shroud defining a pair of openings on opposite sides of the first end, the opening extending lengthwise from a medial portion of the shroud to the first end of the shroud, wherein the ferrule is accessible within the first end of the shroud.

9. The preconnectorized outdoor cable of claim 7, further comprising a heat shrink tube for weatherproofing the preconnectorized outdoor cable, the heat shrink tube being disposed about the second end of the shroud and a portion of the cable jacket.

10. The preconnectorized outdoor cable of claim 7, further comprising an O-ring disposed on the shroud for weatherproofing the at least one plug connector.

11. The preconnectorized outdoor cable of claim 1, the at least one plug connector further comprising a shroud having a first end and a second end, wherein the shroud has at least one alignment indicia for indicating a mating orientation.

12. The preconnectorized outdoor cable of claim 1, the at least one plug connector further comprising a shroud having a first end and a second end, the shroud has a plurality of fingers for mating with a complementary receptacle, wherein at least two of the fingers have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

13. The preconnectorized outdoor cable of claim 1, the two half-shells being held together by a crimp band, wherein the crimp band secures the at least one tensile strength member.

14. The preconnectorized outdoor cable of claim 1, the at least one plug connector having a protective cap and a retention wire, wherein the protective cap is attached to the at least one plug connector by a retention wire.

15. The preconnectorized outdoor cable of claim 1, a plurality of the components of the at least one plug connector being formed from a UV stabilized material.

16. The preconnectorized outdoor cable of claim 1, the cable having two or more plug connectors.

17. The preconnectorized outdoor cable of claim 1, the optical transmission component further comprising a dry insert.

18. A preconnectorized outdoor cable, comprising:

an optical transmission component;

at least two strength components, the at least two strength components disposed on opposite sides of the optical transmission component;

a plurality of tensile strength members, the plurality of tensile strength members being generally arranged about the optical transmission component and generally contacting the optical transmission component, the plurality of tensile strength members being fibrous tensile strength members that essentially lack anti-buckling strength;

a cable jacket, the cable jacket contacting at least a portion of the optical transmission component; and

at least one plug connector, the at least one plug connector being attached to an end of the cable, thereby connectorizing an optical waveguide, the optical waveguide being a portion of the optical transmission component, wherein the at least one plug connector includes a crimp housing and a connector assembly, the crimp housing having two half-shells that secure a portion of the connector assembly therebetween where the connector assembly includes a ferrule and connector housing.

19. The preconnectorized outdoor cable of claim 18, the two half-shells being held together by a crimp band.

20. The preconnectorized outdoor cable of claim 18, the at least one plug connector further comprising a shroud and the crimp housing is at least partially disposed within the shroud, the shroud having two fingers for mating with a complementary receptacle, wherein the two fingers are disposed about 180 degrees apart and have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

21. The preconnectorized outdoor cable of claim 18, the at least one plug connector further comprising a shroud having a first end and a second end, and a coupling nut.

22. The preconnectorized outdoor cable of claim 21, the shroud defining a pair of openings on opposite sides of the first end, the opening extending lengthwise from a medial portion of the shroud to the first end of the shroud, wherein the ferrule is accessible within the first end of the shroud.

23. The preconnectorized outdoor cable of claim 21, further comprising a heat shrink tube for weatherproofing the preconnectorized outdoor cable, the heat shrink tube being disposed about the second end of the shroud and a portion of the cable jacket.

24. The preconnectorized outdoor cable of claim 21, further comprising an O-ring disposed on the shroud for weatherproofing the at least one plug connector.

25. The preconnectorized outdoor cable of claim 18, the at least one plug connector further comprising a shroud having a first end and a second end, wherein the shroud has at least one alignment indicia for indicating a mating orientation.

26. The preconnectorized outdoor cable of claim 18, the at least one plug connector further comprising a shroud having a first end and a second end, the shroud has a plurality of fingers for mating with a complementary receptacle, wherein at least two of the fingers have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

27. The preconnectorized outdoor cable of claim 18, further comprising a heat shrink tube for weatherproofing the preconnectorized outdoor cable, the heat shrink tube being disposed over a portion of the at least one plug connector and a portion of the cable jacket.

28. The preconnectorized outdoor cable of claim 18, the at least one plug connector having a protective cap and a retention wire, wherein the protective cap is attached to the at least one plug connector by a retention wire.

29. The preconnectorized outdoor cable of claim 18, a plurality of the components of the at least one plug connector being formed from a UV stabilized material.

30. The preconnectorized outdoor cable of claim 18, the cable having two or more plug connectors.

31. The preconnectorized outdoor cable of claim 18, the optical transmission component further comprising a dry insert.

46. The preconnectorized outdoor cable of claim 18, the two half-shells being held together by a crimp band, wherein the crimp band secures one of the plurality of tensile strength members.

47. The preconnectorized outdoor cable of claim 18, further comprising at least tensile strength member and a crimp band, wherein the two half-shells are secured by the crimp band and the crimp band also secures the at least one tensile strength member.

48. The preconnectorized outdoor cable of claim 18, the at least one plug connector further comprising at least one cable clamping portion and a crimp band, the at least one cable clamping portion securing one of the at least two strength components of the cable therein and the two half-shells being held together by the crimp band.

32. A preconnectorized outdoor cable, comprising:

an optical transmission component;

at least two strength components, the at least two strength components are disposed on opposite sides of the optical transmission component

a cable jacket; and

at least one plug connector, the at least one plug connector being attached to an end of the cable, thereby connectorizing an optical waveguide, the optical waveguide being a portion of the optical transmission component, wherein the at least one plug connector includes a crimp housing and a connector assembly, the crimp housing having two half-shells that secure a portion of the connector assembly therebetween where the connector assembly includes a ferrule and connector housing.

33. The preconnectorized outdoor cable of claim 32, the at least one plug connector further comprising a shroud and the crimp housing is at least partially disposed within the shroud, the shroud having two fingers for mating with a complementary receptacle, wherein the two fingers are disposed about 180 degrees apart and have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

34. The preconnectorized outdoor cable of claim 32, the at least one plug connector further comprising at least one cable clamping portion and a crimp band, the at least one cable clamping portion securing one of the at least two strength components of the cable therein and the two half-shells being held together by the crimp band.

35. The preconnectorized outdoor cable of claim 32, the at least one plug connector further comprising a shroud having a first end and a second end, and a coupling nut.

36. The preconnectorized outdoor cable of claim 35, the shroud defining a pair of openings on opposite sides of the first end, the opening extending lengthwise from a medial portion of the shroud to the first end of the shroud, wherein the ferrule is accessible within the first end of the shroud.

37. The preconnectorized outdoor cable of claim 35, further comprising a heat shrink tube for weatherproofing the preconnectorized outdoor cable, the heat shrink tube being disposed about the second end of the shroud and a portion of the cable jacket.

38. The preconnectorized outdoor cable of claim 35, further comprising an O-ring disposed on the shroud for weatherproofing the at least one plug connector.

39. The preconnectorized outdoor cable of claim 32, the at least one plug connector further comprising a shroud having a first end and a second end, wherein the shroud has at least one alignment indicia for indicating a mating orientation.

40. The preconnectorized outdoor cable of claim 32, the at least one plug connector further comprising a shroud having a first end and a second end, the shroud has a plurality of fingers for mating with a complementary receptacle, wherein at least two of the fingers have different cross-sectional shapes for keying the plug connector with the complementary receptacle.

41. The preconnectorized outdoor cable of claim 32, the crimp housing being a portion of a crimp assembly that includes a crimp band for holding the crimp housing together.

42. The preconnectorized outdoor cable of claim 32, the at least one plug connector having a protective cap and a retention wire, wherein the protective cap is attached to the at least one plug connector by a retention wire.

43. The preconnectorized outdoor cable of claim 32, a plurality of the components of the at least one plug connector being formed from a UV stabilized material.

44. The preconnectorized outdoor cable of claim 32, the cable having two or more plug connectors.

45. The preconnectorized outdoor cable of claim 32, the optical transmission component further comprising a dry insert.