Data cable with cross-twist cabled core profile

• US 7,534,964 B2
• Filed: 06/20/2008
• Issued: 05/19/2009
• Est. Priority Date: 04/22/1997
• Status: Expired due to Fees

• Current Assignee: Belden Technologies, LLC (Belden Inc.)
• Original Assignee: Belden Technologies, LLC (Belden Inc.)
• Inventors: Gareis, Galen M, Clark, William T
• Primary Examiner(s): Mayo, III; William H
• Application Number:
  US12/143,388
• Publication Number:
  US 20080251276A1
• Time in Patent Office: 333 Days
• Field of Search: 174/110.R, 174/113.R, 174/115, 174/116, 174/120.R, 174/120.SR
• US Class Current: 174/113.00R
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens

Abstract

Cables including a plurality of twisted pairs of insulated conductors and a jacket surrounding the plurality of twisted pairs of insulated conductors, the jacket including a plurality of protrusions extending away from an inner circumferential surface of the jacket toward a center of the cable. The plurality of protrusions are configured so as to hold the plurality of twisted pairs away from the inner circumferential surface of the jacket, and may provide an air gap between the plurality of twisted pairs of insulated conductors and the inner circumferential surface of the jacket.

Claims

1. A cable for data transmission, the cable comprising:

a cable core including a plurality of twisted pairs of insulated conductors including a first twisted pair and a second twisted pair, each twisted pair comprising two insulated conductors twisted together in a helical manner;

a jacket surrounding the cable core; and

an element disposed between the cable core and the jacket along a length of the cable, the element being separate from both the jacket and the cable core and providing an air gap between the jacket and the cable core;

wherein, for any transverse cross-section taken along a radius of the cable, the element contacts the cable jacket at only one location on an inner circumference of the jacket.

2. The cable as claimed in claim 1, wherein the element comprises a dielectric helixed spline.

3. The cable as claimed in claim 2, wherein the dielectric helixed spline comprises a fluoropolymer.

4. The cable as claimed in claim 2, wherein the dielectric helixed spline comprises a dielectric finned element twisted about its own axis to form the dielectric helixed spline.

5. The cable as claimed in claim 1, wherein the element comprises a plurality of separate dielectric helixed splines positioned about a circumference of the cable core.

6. The cable as claimed in claim 1, wherein the cable core further comprises a separator disposed among the plurality of twisted pairs of insulated conductors so as to separate at least one the plurality of twisted pairs from others of the plurality of twisted pairs.

7. The cable as claimed in claim 6, wherein the cable core, the jacket and the element are helically twisted together with a cable twist lay that is within a range of about 2 to 6 inches.

8. The cable as claimed in claim 1, wherein the element is helically wrapped around the cable core along the length of the cable.

9. The cable as claimed in claim 1, wherein the plurality of twisted pairs includes four twisted pairs of insulated conductors.

10. The cable as claimed in claim 1, wherein the element is a conductive rod.

11. A bundled cable comprising:

a plurality of individual cables for data transmission;

wherein at least one of the individual cables for data transmission comprises;

a cable core including a plurality of twisted pairs of insulated conductors including a first twisted pair and a second twisted pair, each twisted pair comprising two insulated conductors twisted together in a helical manner;

a jacket surrounding the cable core; and

an element disposed between the cable core and the jacket along a length of the at least one individual cable, the element being separate from both the jacket and the cable core and providing an air gap between the jacket and the cable core; and

wherein, for any transverse cross-section taken along a radius of the at least one individual cable, the element contacts the jacket at only one location on an inner circumference of the jacket.

12. The bundled cable as claimed in claim 11, wherein the element comprises a dielectric helixed spline.

13. The bundled cable as claimed in claim 12, wherein the dielectric helixed spline comprises a fluoropolymer.

14. The bundled cable as claimed in claim 11, wherein the cable core further comprises a separator disposed among the plurality of twisted pairs of insulated conductors so as to separate the first twisted pair from the second twisted pair.

15. The bundled cable as claimed in claim 11, wherein the element comprises a plurality of separate dielectric helixed splines positioned about a circumference of the cable core.

16. A cable for data transmission, the cable comprising:

a cable core comprising a plurality of twisted pairs of insulated conductors including a first twisted pair and a second twisted pair, each twisted pair comprising two insulated conductors twisted together in a helical manner;

a jacket surrounding the plurality of twisted pairs of insulated conductors; and

a dielectric helixed spline disposed between the cable core and the jacket along a length of the cable, the dielectric helixed spline providing an air gap between the jacket and the cable core;

wherein the dielectric helixed spline comprises a fluoropolymer.

17. The cable for data transmission as claimed in claim 16, wherein the cable core further comprises a separator disposed among the plurality of twisted pairs of insulated conductors so as to separate the first twisted pair from the second twisted pair.