US 4,913,517 A · Communication cable having water blocking strength members

Abstract

A communications cable (20) comprising a core (22) of at least one transmission media and a plastic jacket (34) includes provisions for preventing the movement of water within the cable. The cable includes a strength system (32) including longitudinally extending fibrous strength members (32-33) having a relatively high modulus and having water blocking provisions. In one embodiment, each fibrous strength member is treated with a superabsorbent liquid material which when dry fills interstices and covers portions of the exterior thereof. In another embodiment, a filamentary strand material comprising a water swellable fibrous material is wrapped about each fibrous strength member.

Claims24

Dependent claims

A communications cable, comprising:

a core having a longitudinal axis and comprising at least one communications medium;
a jacket which comprises a plastic material and which encloses said core;
and
a longitudinally extending, relatively supple strength member system for the cable which is disposed between said core and said jacket, said strength member system having a relatively high modulus to provide suitable strength characteristics for said cable and including means for blocking water flow within said cable.

1 more element

Dependencies are inferred from the claim text.

Communication cable having water blocking strength members

Life of this patent

Communication cable having water blocking strength members

Life of this patent

Abstract

Claims24