Multilayer cable jacket

• US 8,618,418 B2
• Filed: 04/29/2009
• Issued: 12/31/2013
• Est. Priority Date: 04/29/2009
• Status: Active Grant

• Current Assignee: PPC Broadband Incorporated (Belden Inc.)
• Original Assignee: PPC Broadband Incorporated (Belden Inc.)
• Inventors: Amato, Alan John
• Primary Examiner(s): NGUYEN, CHAU N
• Application Number:
  US12/432,546
• Publication Number:
  US 20100276179A1
• Time in Patent Office: 1,707 Days
• Field of Search: 174/28, 174/106.R, 174/120.R
• US Class Current: 174/120.R
• CPC Class Codes: H01B 7/1875 Multi-layer sheaths
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49123 Co-axial cable

Abstract

A multilayer cable jacket. In one example embodiment, a cable includes one or more internal components and a multilayer jacket surrounding the one or more internal components. The one or more internal components include at least one electrical conductor configured to propagate a signal. The multilayer jacket includes an inner layer surrounded by an outer layer with the inner layer being less rigid than the outer layer.

Claims

1. A cable comprising:

one or more internal components comprising at least one electrical conductor to propagate a signal;

a dielectric surrounding the electrical conductor;

a multilayer outer conductor surrounding the dielectric, wherein the multilayer outer conductor is configured for RF shielding, and wherein the multilayer outer conductor is aligned coaxially with the at least one electrical conductor;

a multilayer jacket surrounding the multilayer outer conductor, the multilayer jacket comprising a compressible inner jacket layer surrounded by a non-compressible rigid outer jacket layer, wherein the inner jacket layer is less rigid than the outer jacket layer, wherein a relative pliability of the inner jacket layer with respect to the outer jacket layer reduces an amount of insertion force required to fully insert a post of a cable connector underneath the multilayer jacket, wherein a portion of the inner jacket layer comprises at least one compressed portion when the post of the cable connector is fully inserted underneath the multilayer jacket, wherein the at least one compressed portion comprises a first thickness differing from a second thickness of a non-compressed portion of the inner jacket layer, and wherein the first thickness is less than the second thickness.

2. The cable as recited in claim 1, wherein the at least one electrical conductor comprises a center conductor.

3. The cable as recited in claim 1, wherein the outer jacket layer comprises polyethylene (PE).

4. The cable as recited in claim 1, wherein the outer jacket layer comprises high-density polyethylene (HOPE), low-density polyethylene (LOPE), or linear low-density polyethylene (LLDPE), or some combination thereof.

5. The cable as recited in claim 1, wherein the inner jacket layer comprises foamed PE.

6. The cable as recited in claim 1, wherein the inner jacket layer comprises polyvinyl chloride (PVC).

7. The cable as recited in claim 1, wherein the inner jacket layer comprises polyurethane (PU).

21. The cable as recited in claim 1, wherein the multilayer jacket further comprises a plurality of intervening layers formed between the compressible inner jacket layer and the outer jacket layer.

22. The cable as recited in claim 1, wherein the compressible inner jacket layer comprises a combination of foamed PE, PVC, and PU.

23. The cable as recited in claim 1, further comprising the cable connector comprising the post fully inserted underneath the multilayer jacket.

24. The cable as recited in claim 1, wherein the multilayer jacket comprises a plurality of intermediate layers formed between the compressible inner jacket layer and the outer jacket layer.

25. The cable as recited in claim 1, wherein the at least one compressed portion is formed between the non-compressed portion of the inner jacket layer and an additional non-compressed portion of the inner jacket layer.

8. A coaxial cable comprising:

a center conductor;

a dielectric surrounding the center conductor;

a conductive tape layer surrounding the dielectric;

a conductive braid layer surrounding the conductive tape layer, wherein the conductive tape layer in combination with the conductive braid layer is configured for RF shielding, and wherein the conductive tape layer and the conductive braid layer are each aligned coaxially with the center conductor; and

a multilayer jacket surrounding the conductive braid layer, the multilayer jacket comprising a compressible inner jacket layer surrounded by a non-compressible rigid outer jacket layer, wherein the inner jacket layer is less rigid than the outer jacket layer, wherein a relative pliability of the inner jacket layer with respect to the outer jacket layer reduces an amount of insertion force required to fully insert a post of a cable connector underneath the multilayer jacket, wherein a portion of the inner jacket layer comprises at least one compressed portion when the post of the cable connector is fully inserted underneath the multilayer jacket, wherein the at least one compressed portion comprises a first thickness differing from a second thickness of a non-compressed portion of the inner jacket layer, and wherein the first thickness is less than the second thickness.

9. The coaxial cable as recited in claim 8, further comprising a second conductive tape surrounding the conductive braid and surrounded by the multilayer jacket.

10. The coaxial cable as recited in claim 8, wherein the coaxial cable is a flooded coaxial cable and/or a messengered coaxial cable.

11. The coaxial cable as recited in claim 8, wherein the outer jacket layer comprises PE, HDPE, LDPE, or LLDPE, or some combination thereof.

12. The coaxial cable as recited in claim 8, wherein the inner jacket layer comprises foamed PE.

13. The coaxial cable as recited in claim 8, wherein the inner jacket layer comprises PVC.

14. The coaxial cable as recited in claim 8, wherein the inner jacket layer comprises PU.

15. A coaxial cable comprising:

a center conductor;

a dielectric surrounding the center conductor;

a first conductive tape layer surrounding the dielectric;

a first conductive braid layer surrounding the first conductive tape layer;

a second conductive tape layer surrounding the first conductive braid layer;

a second conductive braid layer surrounding the second conductive tape layer, wherein the first conductive tape layer in combination with the second conductive tape layer, the first conductive braid layer, and the second conductive braid layer is configured for RF shielding, and wherein the first conductive tape layer, the second conductive tape layer, the first conductive braid layer, and the second conductive braid layer are each aligned coaxially with the center conductor; and

a non-compressible rigid outer jacket layer,

a multilayer jacket surrounding the second conductive braid layer, the multilayer jacket comprising a compressible inner jacket layer surrounded by a non-compressible rigid outer jacket layer, wherein the inner jacket layer is less rigid than the outer jacket layer, wherein a relative pliability of the inner jacket layer with respect to the outer jacket layer reduces an amount of insertion force required to fully insert a post of a cable connector underneath the multilayer jacket, wherein a portion of the inner jacket layer comprises at least one compressed portion when the post of the cable connector is fully inserted underneath the multilayer jacket, wherein the at least one compressed portion comprises a first thickness differing from a second thickness of a non-compressed portion of the inner jacket layer, and wherein the first thickness is less than the second thickness.

16. The coaxial cable as recited in claim 15, wherein the coaxial cable is a flooded coaxial cable and/or a messengered coaxial cable.

17. The coaxial cable as recited in claim 15, wherein the outer jacket layer comprises PE, HDPE, LDPE, or LLDPE, or some combination thereof.

18. The coaxial cable as recited in claim 15, wherein the inner jacket layer comprises foamed PE.

19. The coaxial cable as recited in claim 15, wherein the inner jacket layer comprises PVC.

20. The coaxial cable as recited in claim 15, wherein the inner jacket layer comprises PU.