Jacket construction having increased flame resistance

• US 20060169479A1
• Filed: 01/28/2005
• Published: 08/03/2006
• Est. Priority Date: 01/28/2005
• Status: Active Grant

• Current Assignee: Superior Essex Communications LP (LS Corporation)
• Original Assignee: Superior Essex Communications LP (LS Corporation)
• Inventors: McNutt, Christopher W., Warren, Douglas S., Dillon, Scott
• Granted Patent: US 7,256,351 B2
• Time in Patent Office: Days
• US Class Current: 174/113.R
• CPC Class Codes: H01B 11/04 with pairs or quads mutually positioned to reduce cross-talk
• CPC Class Codes: H01B 7/29 Protection against damage caused by extremes of temperature or by flame heat dissipation or conduction H01B7/42

Abstract

A communications cable having increased fire resistance and reduced attenuation and crosstalk includes a core having at least one insulated electrical conductor, and a jacket having an inner surface and a plurality of ribs projecting radially inward from the inner surface, the ribs separated from one another by adjacent channels that extend longitudinally along the length of the cable.

Claims

1-25. -25. (canceled)

26. A method making a cable, comprising:

forming a plurality of ribs on an inner surface of a cable jacket, wherein said ribs project radially inward from said inner surface and run longitudinally along the length of the cable, and wherein said ribs are separated from neighboring ribs by adjacent channels; and

enclosing a cable core within said cable jacket, said cable core comprising at least one insulated electrical conductor.

27. The method of claim 26, wherein said forming a plurality of ribs comprises extrusion, pultrusion or molding.

32. The cable of claim 26 wherein said channel has a width of about 0.028 inches.

28. A communications cable comprising:

a core having at least one insulated electrical conductor of about 0.0455 inches in diameter; and

a jacket having a wall thickness of about 0.026 inches, an inner surface and a plurality of ribs projecting radially inward from said inner surface and running longitudinally along the length of the cable, wherein said ribs are separated from neighboring ribs by adjacent channels; and

wherein said ribs have a height of at least 0.0725 inches and a width of at least 0.020 inches.

29. The cable of claim 28 wherein said rib height is about 0.028 inches.

30. The cable of claim 28 wherein said rib width is about 0.034 inches.

31. The cable of claim 28 wherein said channels have a width of from about 0.020 inches to about 0.040 inches.