High performance data cable

• US 7,977,575 B2
• Filed: 12/23/2009
• Issued: 07/12/2011
• Est. Priority Date: 04/09/1996
• Status: Expired due to Fees

• Current Assignee: Belden Inc.
• Original Assignee: Belden Inc.
• Inventors: Vanderlaan, Paul Z, Gareis, Galen Mark
• Primary Examiner(s): Mayo, III; William H
• Application Number:
  US12/646,657
• Publication Number:
  US 20100096160A1
• Time in Patent Office: 566 Days
• Field of Search: 174/110.R, 174/113.R, 174/113.C, 174/120.R, 174/131.AS, 174/131.A, 174/115, 174/116.R, 174/112
• US Class Current: 174/110.00R
• CPC Class Codes: H01B 11/02 Cables with twisted pairs or quads
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens

Abstract

A high performance data cable which has an interior support or star separator. The star separator or interior support extends along the longitudinal length of the data cable. The star separator or interior support has a central region. A plurality of prongs or splines extend outward from the central region along the length of the central region. Each prong or spline is adjacent with at least two other prongs or splines. The prongs or splines may be helixed or S-Z shaped as they extend along the length of the star separator or interior support. Each pair of adjacent prongs or splines defines grooves which extend along the longitudinal length of the interior support. At least two of the grooves have disposed therein an insulated conductor. The interior support can have a first material and a different second material. The different second material forms an outer surface of the interior support.

Claims

1. An unshielded twisted pair data communications cable comprising:

a plurality of twisted pair conductors configured to carry data communications signals;

a non-conductive interior support consisting of at least one non-conductive material and having a surface that defines a plurality of channels in the data communications cable within which the plurality of twisted pair conductors are individually disposed; and

an outer jacket longitudinally enclosing the plurality of twisted pair conductors and the non-conductive interior support to form the data communications cable, the outer jacket being formed of a non-conductive material;

wherein the outer jacket in combination with the non-conductive interior support maintains the plurality of twisted pair conductors within the channels defined by the surface of the non-conductive interior support; and

wherein the unshielded data cable does not include a shield between the outer jacket and the twisted pair conductors and the non-conductive interior support.

2. The unshielded twisted pair data communications cable as claimed in claim 1, wherein the non-conductive interior support comprises a longitudinally extending central portion and a plurality of projections extending radially outward from the longitudinally extending central portion to at least an outer boundary defined by an outer dimension of the twisted pair conductors.

3. The unshielded twisted pair data communications cable as claimed in claim 2, wherein the plurality of channels are defined by the plurality of projections.

4. The unshielded twisted pair data communications cable as claimed in claim 3, wherein each projection of the plurality of projections is adjacent two other projections of the plurality of projections, the plurality of projections forming a plurality of pairs of adjacent projections;

and

wherein each channel of the plurality of channels is defined by one pair of adjacent projections of the plurality of adjacent projections.

5. The unshielded twisted pair data communications cable as claimed in claim 3, wherein the plurality of projections consists of four projections;

and

the plurality of channels consists of four channels; and

the plurality of twisted pair conductors consists of four twisted pair conductors.

6. The unshielded twisted pair data communications cable as claimed in claim 5, wherein each projection of the four projections extends radially outward from the central portion at approximately right angles to at least one other projection of the four projections.

7. The twisted pair data communications cable as claimed in claim 2, wherein the plurality of projections extend radially outward from the central portion to at least an outer boundary defined by an outer dimension of the twisted pair conductors.

8. The twisted pair data communications cable as claimed in claim 2, wherein each projection has a non-uniform width.

9. The twisted pair data communications cable as claimed in claim 8, wherein each projection has a substantially triangular shape.

10. The unshielded twisted pair data communications cable as claimed in claim 1, wherein the non-conductive interior support is formed of a copolymer.

11. The unshielded twisted pair data communications cable as claimed in claim 1, wherein each twisted pair conductor of the plurality of twisted pair conductors comprises two electrical conductors, each insulated with a copolymer, which are helically twisted together to form the twisted pair conductor.

12. The unshielded twisted pair data communications cable as claimed in claim 1, wherein the plurality of twisted pair conductors and the non-conductive interior support are twisted together about a common axis to close the cable.

13. The unshielded twisted pair data communications cable as claimed in claim 12, wherein the plurality of twisted pair conductors and the non-conductive interior support are twisted together with one of a helical twist and an S-Z twist.

14. The unshielded twisted pair data communications cable as claimed in claim 1, wherein the non-conductive interior support is a one-piece plastic interior support which is solid beneath the surface.

15. The twisted pair data communications cable as claimed in claim 1, wherein the unshielded data cable does not include any additional layers between the outer jacket and the twisted pair conductors and the non-conductive interior support.

16. The twisted pair data communications cable as claimed in claim 1, further comprising a gel filler filling a void space between the non-conductive interior support, the plurality of twisted pair conductors, and the outer jacket.

17. A twisted pair data communications cable comprising:

four twisted pair conductors configured to carry data communications signals;

a non-conductive interior support having a surface that defines four channels, one twisted pair conductor of the four twisted pairs of conductors respectively disposed in each of four channels; and

an outer jacket longitudinally enclosing the four twisted pair conductors and the non-conductive interior support to form the data communications cable, the outer jacket consisting of one or more non-conductive materials;

wherein the outer jacket in combination with the non-conductive interior support maintains the four twisted pair conductors within the four channels defined by the surface of the non-conductive interior support;

wherein the non-conductive interior support comprises a longitudinally extending central portion and four projections extending radially outward from the central portion;

wherein the four channels are defined by adjacent pairs of the four projections; and

wherein each projection has a non-uniform width.

18. The twisted pair data communications cable as claimed in claim 17, wherein the non-conductive interior support is a one-piece plastic interior support formed of a copolymer.

19. The twisted pair data communications cable as claimed in claim 18, wherein the non-conductive interior support is solid beneath the surface.

20. The twisted pair data communications cable as claimed in claim 17, wherein the four twisted pair conductors and the non-conductive interior support are twisted together about a common axis to close the cable.

21. The twisted pair data communications cable as claimed in claim 20, wherein the four twisted pair conductors and the non-conductive interior support are twisted together with one of a helical twist and an S-Z twist.

22. The twisted pair data communications cable as claimed in claim 17, wherein the outer jacket comprises polyvinyl chloride.

23. The twisted pair data communications cable as claimed in claim 17, wherein each projection has a substantially triangular shape.

24. A twisted pair data communications cable consisting of:

four twisted pair conductors configured to carry data communications signals;

a non-conductive interior support comprising a longitudinally extending central portion and four projections extending radially outward from the central portion; and

an outer jacket longitudinally enclosing the four twisted pair conductors and the non-conductive interior support, the outer jacket being formed of a non-conductive material;

wherein the four projections form four adjacent pairs of projections that define four channels in which the four twisted pair conductors are individually disposed;

wherein each projection of the four projections has a base that is integral with the central portion of the non-conductive interior support, a tip, a first lateral side, and a second lateral side, the first lateral side and the second lateral side extending from the base to the tip of the projection, the first and second lateral sides converging toward one another from the base to the tip of the projection;

wherein the outer jacket in combination with the non-conductive interior support maintains the four twisted pair conductors within the four channels defined by the four adjacent pairs of projections; and

wherein the four twisted pair conductors and the non-conductive interior support are twisted together about a common axis to close the data communications cable.

25. The twisted pair data communications cable as claimed in claim 24, wherein the non-conductive interior support comprises a one piece interior support that is formed of a copolymer and unshielded.

26. The twisted pair data communications cable as claimed in claim 24, wherein the outer jacket contacts the tip of each projection.

27. The twisted pair data communications cable as claimed in claim 24, wherein the outer jacket comprises polyvinyl chloride.

28. The twisted pair data communications cable as claimed in claim 24, wherein the cross-sectional shape of each projection of the plurality of projections is approximately an isosceles triangle.

29. An unshielded twisted pair data communications cable comprising:

a plurality of twisted pair conductors configured to carry data communications signals;

a non-conductive, unshielded interior support constructed and arranged within the cable to provide at least two channels within which the plurality of twisted pair conductors are disposed, at least one channel containing at least two twisted pair conductors; and

an outer jacket longitudinally enclosing the plurality of twisted pair conductors and the non-conductive interior support;

wherein the non-conductive, unshielded interior support consists of at least one dielectric material; and

wherein the plurality of twisted pair conductors and the non-conductive interior support are helically twisted together about a common central axis to close the data communications cable.

30. The unshielded twisted pair data communications cable as claimed in claim 29, wherein the non-conductive interior support comprises a copolymer.

31. The unshielded twisted pair data communications cable as claimed in claim 29, wherein the cable does not include a shield or any additional layers between the outer jacket and the twisted pair conductors and the non-conductive interior support.

32. The unshielded twisted pair data communications cable as claimed in claim 29, wherein the outer jacket comprises polyvinyl chloride.

33. The unshielded twisted pair data communications cable as claimed in claim 29, wherein the non-conductive interior support is solid beneath its surface.

34. The unshielded twisted pair data communications cable as claimed in claim 29, further comprising a non-conductive binder disposed beneath the outer jacket.