Electrical cable

Patent metadata

Field	Value
Publication number	US-10373741-B2
Application number	US-201715591579-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	May 10, 2017
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

An electrical cable includes a first conductor assembly having a first inner conductor and a first insulator engaging and surrounding a surface of the first inner conductor and a second conductor assembly having a second inner conductor and a second insulator engaging and surrounding a surface of the second inner conductor. The electrical cable includes a non-conductive buffer layer surrounding the conductor assemblies having an inner surface engaging the insulators and a conductive shield layer engaging and surrounding an outer surface of the non-conductive buffer layer and providing electrical shielding for the conductor assemblies. An outer jacket engages and surrounds the conductive shield layer.

First claim

What is claimed is:

1. An electrical cable comprising:
a first conductor assembly that extends along a length of the electrical cable, the first conductor assembly comprising a first inner conductor and a first insulator engaging and surrounding a surface of the first inner conductor;
a second conductor assembly adjacent the first conductor assembly along the length of the electrical cable, the second conductor assembly comprising a second inner conductor and a second insulator engaging and surrounding a surface of the second inner conductor;
a non-conductive buffer layer surrounding the first and second conductor assemblies, the non-conductive buffer layer having an inner surface engaging the first and second insulators and an outer surface opposite the inner surface and comprising braided strands of non-conductive material;
a third conductor assembly that extends along the length of the electrical cable, the third conductor assembly comprising a third inner conductor and a third insulator engaging and surrounding a surface of the third inner conductor;
a fourth conductor assembly that extends along the length of the electrical cable, the fourth conductor assembly comprising a fourth inner conductor and a fourth insulator engaging and surrounding a surface of the fourth inner conductor;
a second non-conductive buffer layer surrounding the third and fourth conductor assemblies, the second non-conductive buffer layer engaging the third and fourth insulators, wherein the shield layer engages and surrounds the second non-conductive buffer layer;
a conductive shield layer engaging and surrounding the outer surface of the non-conductive buffer layer, the shield layer providing electrical shielding for the first and second conductor assemblies; and
an outer jacket engaging and surrounding the conductive shield layer.

2. An electrical cable comprising:
a first conductor assembly that extends along a length of the electrical cable, the first conductor assembly comprising a first inner conductor and a first insulator engaging and surrounding a surface of the first inner conductor;
a second conductor assembly adjacent the first conductor assembly along the length of the electrical cable, the second conductor assembly comprising a second inner conductor and a second insulator engaging and surrounding a surface of the second inner conductor;
a non-conductive buffer layer surrounding the first and second conductor assemblies, the non-conductive buffer layer having an inner surface engaging the first and second insulators and an outer surface opposite the inner surface and comprising braided strands of non-conductive material;
a third conductor assembly that extends along the length of the electrical cable, the third conductor assembly comprising a third inner conductor and a third insulator engaging and surrounding a surface of the third inner conductor;
a fourth conductor assembly that extends along the length of the electrical cable, the fourth conductor assembly comprising a fourth inner conductor and a fourth insulator engaging and surrounding a surface of the fourth inner conductor;
a second non-conductive buffer layer surrounding the third and fourth conductor assemblies, the second non-conductive buffer layer having an inner surface engaging the third and fourth insulators and an outer surface opposite the inner surface;
a conductive shield layer engaging and surrounding the outer surface of the non-conductive buffer layer, the shield layer providing electrical shielding for the first and second conductor assemblies;
a second conductive shield layer engaging and surrounding the outer surface of the second non-conductive buffer layer, the second shield layer providing electrical shielding for the third and fourth conductor assemblies; and
an outer jacket engaging and surrounding the conductive shield layer and the second conductive shield layer.

3. The electrical cable of claim 1 , wherein the conductive shield layer comprises braided strands of conductive material.

4. The electrical cable of claim 3 , wherein the non-conductive buffer layer has M number of picks of braided strands of non-conductive material and the conductive shield layer has N number of picks of braided strands of conductive material different than the M number of picks of braided strands of non-conductive material.

5. The electrical cable of claim 1 , wherein the first and second conductor assemblies are electrically connected to a camera at a first end of the electrical cable and the first and second conductor assemblies are electrically connected to a camera control unit at a second end of the electrical cable.

6. The electrical cable of claim 1 , wherein the shield layer has a uniform radial thickness around the outer perimeters of the first and second insulators.

7. The electrical cable of claim 1 , wherein the non-conductive buffer layer has a uniform thickness between the inner surface and the outer surface to locate the conductive shield layer at a uniform distance from the first and second conductor assemblies.

8. The electrical cable of claim 1 , wherein the non-conductive buffer layer comprises braided strands of aromatic polymer material.

9. The electrical cable of claim 1 , wherein the non-conductive buffer layer is porous to air.

10. The electrical cable of claim 1 , wherein the non-conductive buffer layer has greater flexibility per thickness than the material of the first and second insulators.

11. The electrical cable of claim 1 , wherein the non-conductive buffer layer has increased pull strength compared to the material of the first and second insulators.

12. The electrical cable of claim 2 , wherein the non-conductive buffer layer is braided around the first and second conductor assemblies.

13. The electrical cable of claim 1 , wherein the first and second conductor assemblies are twisted helically around each other along the length of the electrical cable.

14. The electrical cable of claim 1 , wherein the inner surface engages the first insulator along a minority of a circumference of the first insulator and the inner surface engages the second insulator along a minority of a circumference of the second insulator.

15. The electrical cable of claim 1 , wherein the first and second conductor assemblies define a first twisted pair, the third and fourth conductor assemblies define a second twisted pair, and the conductive shield layer provides electrical shielding for the third and fourth conductor assemblies.

Assignees

• Te Connectivity Corp
• Creganna Unlimited Company

Inventors

• Khamphilavong Malai Hongthong
• Mayevskiy Yevgeniy

Classifications

• H04N23/555

  for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H01B11/20

  Cables having a multiplicity of coaxial lines · CPC title

• H01B7/189

  Radial force absorbing layers providing a cushioning effect (H01B7/185 takes precedence) · CPC title

• H04N7/10

  Adaptations for transmission by electrical cable (H04N7/12 takes precedence) · CPC title