Communication wire

• US 7,511,221 B2
• Filed: 03/31/2005
• Issued: 03/31/2009
• Est. Priority Date: 09/24/2002
• Status: Expired due to Fees

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: ADC Incorporated
• Inventors: Kenny, Robert, Wiekhorst, David
• Primary Examiner(s): LEE, JINHEE J
• Application Number:
  US11/095,280
• Publication Number:
  US 20050167146A1
• Time in Patent Office: 1,461 Days
• Field of Search: 174/80, 174/106.D, 174/102.SP, 174/113.AS, 174/28, 174/29, 174/117.AS
• US Class Current: 174/80
• CPC Class Codes: H01B 11/002 Pair constructions
• CPC Class Codes: H01B 11/12 Arrangements for exhibiting specific transmission characteristics
• CPC Class Codes: H01B 7/0233 Cables with a predominant gas dielectric
• CPC Class Codes: H01B 7/0275 comprising one or more extruded layers of insulation

Abstract

A cable is disclosed including at least one conductor, a polymeric insulator surrounding the conductor, the insulator defining a plurality of insulator channels having lengths that run along the length of the conductor. The cable also includes a jacket surrounding the insulator, the jacket also defining a plurality of channels having lengths that run along the length of the jacket.

Claims

1. A cable comprising:

at least one wire including a conductor and a polymeric insulator surrounding the conductor, the insulator defining a plurality of insulator channels having lengths that run along a length of the conductor, the conductor having an exterior surface exposed to gas within the insulator channels; and

a jacket defining an interior passage that extends along a length of the jacket, the interior passage including a central region and a peripheral region, the wire being positioned within the central region, the peripheral region of the interior passage including a plurality of jacket channels that are circumferentially spaced relative to one another about the central region of the interior passage.

2. A cable according to claim 1, wherein inner sides of the insulator channels are bounded by the exterior surface of the conductor.

3. A cable according to claim 1, wherein the at least one wire includes at least two wires twisted about one another to form at least one twisted wire pair, wherein each wire includes a conductor is surrounded by a separate polymeric insulator, each insulator defining a plurality of insulator channels having lengths that run along a length of each conductor, each conductors having an exterior surface exposed to gas within the insulator channels of its corresponding polymeric insulator, the twisted wire pair being positioned within the central region of the interior passage of the jacket.

4. A cable according to claim 3, wherein the at least one twisted wire pair includes at least four of the twisted wire pairs which are positioned within the central region of the interior passage of the jacket.

5. A cable according to claim 1, wherein the polymeric insulator includes a polyolefin material.

6. A cable according to claim 1, wherein the polymeric insulator includes a fluoropolymer material.

7. A cable according to claim 4, wherein the twisted wire pairs generally do not occupy the jacket channels.

8. A cable according to claim 1, wherein the jacket channels each have a cross-sectional area of at least 0.00002 inches.

9. A cable according to claim 1, wherein the jacket has a thickness less than about 0.030 inches.

10. A cable according to claim 1, wherein the jacket includes a fluoropolymer.

11. A cable according to claim 1, wherein the jacket includes a polyvinyl chloride.

12. A cable according to claim 4, wherein number of jacket channels is greater than the number of twisted wire pairs.

13. A cable according to claim 1, wherein each of the insulator channels is generally rectangular in cross-sectional shape, and wherein each of the jacket channels is generally rectangular in shape.

14. A cable according to claim 4, wherein the plurality of twisted wire pairs are twisted around each other to define a core having a diameter less than about 0.25 inches.

15. A cable according to claim 1, wherein the insulated conductor has an overall dielectric constant of less than 2.0.

16. A cable according to claim 1, wherein the insulated conductor has a diameter of less than about 0.042 inches.

17. A cable according to claim 4, wherein a cross sectional area of the insulator channels of one of the twisted wire pairs is different than the cross sectional area of the insulator channels of a second one of the twisted wire pairs.

18. A cable according to claim 1, wherein the insulator defines channels exposed to the conductor and also defines closed channels that are not exposed to the conductor.

19. A cable according to claim 1, wherein the polymeric insulator includes at least six of the insulator channels and the jacket includes at least six of the jacket channels.

20. A cable according to claim 1, wherein a shape of at least one of the channels is selected from the group consisting of rectangular, trapezoidal and arched.

21. A cable according to claim 1, wherein the at least one wire defines a core, the core including an element selected from the group consisting of a copper conductor, an insulator, a shield, a separator and combinations thereof.

22. A cable according to claim 1, wherein the polymeric insulator is extruded through the use of an extrusion tip that includes a bore and a number of radially arranged grooves that extend along a longitudinal axis of the extrusion tip, wherein, during the extrusion process, the conductor is fed through the bore and the grooves create legs defined between the channels of the polymeric insulator.