Low cost, high performance cable-connector system and assembly method

• US 6,848,941 B2
• Filed: 03/17/2003
• Issued: 02/01/2005
• Est. Priority Date: 02/13/2003
• Status: Expired due to Fees

• Current Assignee: Andrew LLC (CommScope Holding Company, Inc.)
• Original Assignee: Andrew Corporation (CommScope Holding Company, Inc.)
• Inventors: Wlos, James, Krabec, James
• Primary Examiner(s): VU, HIEN D
• Application Number:
  US10/249,112
• Publication Number:
  US 20040161970A1
• Time in Patent Office: 687 Days
• Field of Search: 439/585, 439578-584, 439/684, 439/675, 439/932
• US Class Current: 439/585
• CPC Class Codes: H01R 13/5205 Sealing means between cable and housing, e.g. grommet H01R13/5221 takes precedence
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/564 Corrugated cables
• CPC Class Codes: H01R 9/0518 Connection to outer conductor by crimping or by crimping ferrule

Abstract

A cable-connector system advantageously used with flexible, relatively small diameter coaxial cable and connectors, including a coaxial cable with a foam dielectric surrounding an inner conductor; and a tubular outer conductor surrounding the foam dielectric, the outer conductor being composed of aluminum or aluminum alloy and having helical corrugations; and a connector, having: a connector body having a hollow bore with internal perturbations keyed to the helical corrugations and arranged to retentively receive and secure the connector on the cable when the connector is screwed onto the cable with the corrugations engaging the perturbations; the connector body having a crimp section adapted to be compressed by a connector crimping tool; the crimp section configured such that when crimped, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and interlock the connector and cable.

Claims

1. A connector for coaxial cable having a helically corrugated outer conductor and an inner conductor, comprising:

a connector interface at a connector end side of the connector, coupled to a hollow cylindrical body with an inner surface having an internal helical groove section at a cable end side of the connector and a stop in the hollow cylindrical body proximate the connector end side of the internal helical groove section which extends radially inward, a deformation groove between the stop and the internal helical groove section;

the internal helical groove section and the stop configured to mate with the helically corrugated outer conductor, whereby the body is threadable onto the outer conductor until the outer conductor contacts the stop;

the body having a plurality of ridges on an outer surface of the body axially aligned with the internal helical groove section; and

an inner contact located coaxially within the body, the inner contact having a socket contact section at the cable end side, dimensioned for insertion of the inner conductor and electrical connection therewith.

2. The connector of claim 1, further including a cable end shoulder between the helical groove section and the cable end side of the connector.

3. The connector of claim 2, further including a gasket, located in the cable end shoulder.

4. The connector of claim 3, wherein the gasket has an internal surface configured to mate with the helical corrugations of the outer conductor.

5. The connector of claim 3, wherein the gasket is one of neoprene, EPDM, silicone and nitrite material.

6. The connector of claim 1, wherein the socket contact section has a radius that decreases towards the cable end side.

7. The connector at claim 1, wherein the socket contact section has a plurality of slits.

8. The connector of claim 1, wherein the ridges have a height and a width whereby the helical groove section is crimpable by a crimping force generatable by a hand operated crimping tool.

9. The connector of claim 1, further including a retaining barb located on the outer surface at the connector end side of the plurality of ridges;

the retaining barb having a greater outer diameter than the plurality of ridges.

10. The connector of claim 9, wherein the retaining barb has an acute angle.

11. The connector of claim 1, wherein the connector interface is one of type F, N, BNC, SMA, DIN, UHF, CATV, and EIA.

12. The connector of claim 1, wherein the connector interface is coupled to the body by an interference fit into a connector end shoulder in the connector end of the body.

13. The connector of claim 1, wherein the helically corrugated outer conductor and the internal helical groove section have a pair of grooves, each of the grooves oriented 180 degrees away from each other.

14. A connector for coaxial cable having a helically corrugated outer conductor and an inner conductor, comprising:

a connector interface, coupled to a connector end side of a hollow cylindrical body;

an inner surface of the body having a cable end shoulder at a cable end side, which is forward of an internal helical groove section which is forward of a stop in the hollow cylindrical body proximate the connector end which extends radically inward;

the internal helical groove section and the stop configured to mate with the helically corrugated outer conductor, whereby the body is threadable onto the outer conductor until the outer conductor contacts the stop, a deformation groove between the stop and the internal helical groove section;

a plurality of ridges on an outer surface of the body axially aligned with the internal helical groove section;

a body barb located on the outer surface of the body at the connector end side of the plurality of ridges;

the body barb radially protruding from the body; and

an inner contact located coaxially within the body, the inner contact having a socket contact section at the cable end side, dimensioned for insertion of the inner conductor and electrical connection therewith.

15. The connector of claim 14, further including a gasket located in the cable end shoulder;

the gasket having an internal surface configured to mate with the helical corrugations of the outer conductor.

16. The connector of claim 14, wherein the connector interface is one of a type F, N, BNC, SMA, DIN, UHF, CATV, and EIA.

17. The connector of claim 14, wherein the body barb has a triangular section.

18. The connector of claim 17, further including a portion of heat shrink tubing;

the heat shrink tubing applied shrunk about the body, over the body barb.

19. The connector of claim 14, wherein the helically corrugated outer conductor and the internal helical groove section each have mating dual leads.

20. The connector of claim 14, wherein the inner contact is one of beryllium copper, bronze, phosphor bronze and brass.

21. A connector for coaxial cable having a helically corrugated outer conductor and an inner conductor, comprising:

a connector interface, coupled to a connector end side of a hollow cylindrical body;

an inner surface of the body having an internal helical groove section at a cable end side, which is forward of a deformation groove which is forward of a stop in the hollow cylindrical body proximate the connector end side which extends radially inward;

the internal helical groove section and the stop configured to mate with the helically corrugated outer conductor, whereby the body is threadable onto the outer conductor until the outer conductor contacts a stop, the deformation groove between the stop and the internal helical groove section; and

a plurality of ridges on an outer surface of the body axially aligned with the internal helical groove section.

22. The connector of claim 21, further including a cable end shoulder located between the helical groove section and the cable end side, and

a gasket located in the cable end shoulder;

the gasket having an internal surface configured to mate with the helical corrugations of the outer conductor.

23. The connector of claim 21, wherein the connector interface is one of type F and CATV.

24. The connector of claim 21, wherein the internal helical groove section has a dual lead.

25. A low cost, water-blocking cable-connector system advantageously used with flexible, relatively small diameter coaxial cable and associated connectors, comprising:

a. a coaxial cable comprising;

i. a foam dielectric surrounding an inner conductor; and

ii. a tubular outer conductor composed of one of aluminum, and aluminum alloy surrounding the foam dielectric, the outer conductor having helical corrugations penetrating into and compressing the foam dielectric to effectively suppress the formation of fluid migration air gaps or passageways between the outer conductor and the dielectric;

iii. the helical corrugations having a dual lead;

b. a connector, comprising;

i. a connector body having a hollow bore with internal dual lead helical grooves which mate with the helical corrugations of the outer conductor;

ii. the connector body having a spaced series of external, radially extending ridges adapted to be compressed by a connector crimping tool;

iii. the ridges being axially aligned with the internal helical grooves and comprising, in combination with the internal helical grooves, a crimp section of the connector;

iv. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable; and

c. a resilient gasket to block ingress of moisture into the connector, the gasket having internal helical grooves and adapted to being threaded onto the cable such that when the connector is screwed onto the cable the gasket is sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

26. The system defined by claim 25 wherein the ridges have varying height to control the depth and shape of the crimp.

27. A low cost, water-blocking cable-connector system advantageously used with flexible, relatively small diameter coaxial cable and associated connectors, comprising:

a. a coaxial cable comprising;

i. a foam dielectric surrounding an inner conductor; and

ii. a tubular outer conductor composed of one of aluminum and aluminum alloy material surrounding the dielectric, the outer conductor having helical corrugations penetrating into and compressing the dielectric;

b. a connector, comprising;

iii. a connector body having a hollow bore with internal helical grooves which mate with the helical corrugations of the outer conductor;

iv. the connector body having an external area adapted to be compressed by a connector crimping tool;

v. the area being aligned with the internal helical grooves and comprising, in combination with the internal helical grooves, a crimp section of the connector;

vi. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations a prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable; and

d. a resilient gasket configured and positioned to block ingress of moisture into the connector.

28. The system defined by claim 27 wherein the helical outer conductor corrugations and connector internal grooves each have a mating dual lead.

29. The system defined by claim 27 wherein gasket has internal helical grooves and is adapted to being threaded onto the cable such that when the connector is screwed onto the cable, the gasket is sealingly compressed between a capturing section of the connector and the corrugated outer conductor.

30. A low cost, water-blocking cable-connector system advantageously used with flexible, relatively small diameter coaxial cable and associated connectors, comprising:

a. a coaxial cable comprising;

i. a foam dielectric surrounding an inner conductor; and

ii. a tubular outer conductor composed of one of aluminum and aluminum alloy material surrounding the foam dielectric, the outer conductor having corrugations penetrating into and compressing the dielectric;

b. a connector, comprising;

i. a connector body having a hollow bore;

ii. the connector body having a crimp section adapted to be compressed by a connector crimping tool;

iii. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to permanently interlock the connector and cable; and

c. a resilient gasket configured and positioned to block ingress of moisture into the connector.

31. The system defined by claim 30 wherein the corrugations are helical and have a single lead.

32. The system defined by claim 30 wherein the corrugations are helical and have a dual lead.

33. The system defined by claim 30 wherein the hollow bore of the connector or body has internal ribs, helical grooves, or other internal perturbations to enhance retention of the connector on the cable.

34. A cable-connector system advantageously used with flexible, relatively small diameter coaxial cable and connectors, comprising:

a. a coaxial cable comprising;

i. a foam dielectric surrounding an inner conductor; and

ii. a tubular outer conductor surrounding the foam dielectric, the outer conductor being composed of one of aluminum and aluminum alloy and having helical corrugations; and

b. a connector, comprising;

i. a connector body having a hollow bore with internal perturbations keyed to the helical corrugations and configured and arranged to retentively receive and secure the connector on the cable when the connector is screwed onto the cable with the corrugations in engagement with the perturbations;

ii. the connector body having a crimp section adapted to be compressed by a connector crimping tool;

c. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable.

35. The system defined by claim 34 wherein the helical corrugations have a dual lead.

36. The system defined by claim 34 wherein the connector body has in the crimp section a spaced series of external, radially extending ridges adapted to be compressed by a standard connector crimping tool.

37. The system defined by claim 36 wherein the ridges are axially aligned with the internal perturbations.

38. The system defined by claim 35, further including a resilient gasket configured and positioned to block ingress of moisture into the connector;

the gasket has internal dual lead helical grooves and is adapted to being threaded onto the cable such that when the connector is screwed onto the cable the gasket is sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

39. The system defined by claim 36 wherein the ridges have varying height to control the depth and shape of the crimp.

40. For use with a flexible, relatively small diameter coaxial cable comprising a foam dielectric surrounding an inner conductor, and a tubular outer conductor composed of one of aluminum and aluminum alloy material surrounding the foam dielectric, the outer conductor having helical corrugations penetrating into and compressing the foam dielectric, the helical corrugations having a dual lead, a connector, comprising:

a. a connector body having a hollow bore with internal dual lead helical grooves which mate with the helical corrugations of the outer conductor;

i. the connector body having a spaced series of external, radially extending ridges adapted to be compressed by a connector crimping tool;

ii. the ridges being axially aligned with the internal helical grooves and comprising, in combination with the internal helical grooves, a crimp section of the connector;

iii. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable; and

b. a resilient gasket to block ingress of moisture into the connector, the gasket having internal helical grooves and adapted to being threaded onto the cable such that when the connector is screwed onto the cable the gasket is sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

41. The system defined by claim 40 wherein the ridges have varying height to control the depth and shape of the crimp.

42. For use with a low cost, flexible, relatively small diameter coaxial cable, comprising a foam dielectric surrounding an inner conductor and a tubular outer conductor composed of one of aluminum and aluminum alloy material surrounding the foam dielectric, the outer conductor having helical corrugations penetrating into and compressing the foam dielectric, a connector, comprising:

a. a connector body having a hollow bore with internal helical grooves which mate the helical corrugations of the outer conductor;

i. the connector body having an external area adapted to be compressed by a connector crimping tool;

ii. the area being aligned with the internal helical grooves and comprising, in combination with the internal helical grooves, a crimp section of the connector;

iii. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp section deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable; and

b. a resilient gasket to configured and positioned to block ingress of moisture into the connector, the gasket being sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

43. The connector defined by claim 42 wherein the helical outer conductor corrugations and connector internal grooves each have a mating dual lead.

44. The connector defined by claim 42 wherein the gasket has internal helical grooves and is adapted to being threaded onto the cable such that when the connector is screwed onto the cable, the gasket is sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

45. For use with a flexible, relatively small diameter coaxial cable comprising a foam dielectric surrounding an inner conductor and a tubular outer conductor surrounding the foam dielectric, the outer conductor being composed of one of aluminum and aluminum alloy and having helical corrugations, a connector, comprising:

a. a connector body having a hollow bore with internal perturbations keyed to the helical corrugations and configured and arranged to retentively receive and secure the connector on the cable when the connector is screwed onto the cable with the corrugations in engagement with the perturbations;

i. the connector body having a crimp section adapted to be compressed by a connector crimping tool;

ii. the crimp section being sized and configured such that when crimped with a crimping tool, the crimp suction deforms inwardly and distorts the cable outer conductor corrugations to prevent relative rotation between the cable and the connector body and thereby to permanently interlock the connector and cable; and

b. a resilient gasket configured and positioned to block ingress of moisture into the connector, the gasket being sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

46. The connector defined by claim 45 wherein the helical corrugations have a dual lead.

47. The connector defined by claim 45 wherein the connector body has in the crimp section a spaced series of external, radially extending ridges adapted to be compressed by a standard connector crimping tool.

48. The connector system defined by claim 47 wherein the ridges are axially aligned with the internal perturbations.

49. The connector defined by claim 45 wherein the gasket has internal dual lead helical grooves and is adapted to being threaded onto the cable such that when the connector is screwed onto the cable the gasket is sealingly compressed between a cable end shoulder of the connector and the corrugated outer conductor.

50. The connector defined by claim 47 wherein the ridges have varying height to control the depth and shape of the crimp.

51. A water resistant cable and connector system, comprising:

a coaxial cable, comprising;

a center conductor, surrounded by a dielectric, surrounded by a tubular dual lead helically corrugated outer conductor;

the center conductor and the outer conductor formed from one of aluminum and an aluminum alloy; and

a connector, comprising;

a connector interface, coupled to a connector end of a hollow cylindrical body;

an inner surface of the body having an internal dual lead helical groove section at a cable end, adjacent a stop proximate the connector end which extends radially inward;

the internal dual lead helical groove section and the stop configured to mate with the dual lead helically corrugated outer conductor, whereby the body is threaded onto the outer conductor until the outer conductor contacts the stop; and

a plurality of ridges on an outer surface of the body axially aligned with the internal dual lead helical groove section;

the plurality of ridges dimensioned to be crimped by a hand crimp tool capable of deforming the internal dual lead helical groove section and a corresponding section of the outer conductor, thereby interlocking the coaxial cable and the connector.

52. The system of claim 51, further including a gasket mounted between a cable end shoulder located at a cable end of the connector and the corrugated outer conductor.

53. The system of claim 52, wherein the gasket has an internal surface configured to mate with the dual lead helically corrugated outer conductor.

54. The system of claim 51, further including a deformation groove between the stop and the helical groove section.

55. The system of claim 51, wherein the helical groove section is a plurality of internal protrusions which engage the dual lead helically corrugated outer conductor.

56. A water resistant cable and connector system, comprising:

a coaxial cable, comprising;

a center conductor, surrounded by a dielectric, surrounded by a tubular dual lead helically corrugated outer conductor, the outer conductor formed from one of aluminum and an aluminum alloy; and

a connector, comprising;

a connector interface, coupled to a connector end of a hollow cylindrical body;

an inner surface of the body having a mating section at a cable end, adjacent a stop proximate the connector end which extends radially inward;

the mating section and the stop configured to mate with the dual lead helically corrugated outer conductor, whereby the outer conductor is inserted into the mating section until the outer conductor contacts the stop; and

a plurality of outer ridges on an outer surface of the body axially aligned with the mating section;

the plurality of ridges dimensioned to be crimped by a hand crimp tool capable of deforming the mating section and a corresponding section of the outer conductor, thereby interlocking the coaxial cable and the connector.

57. The system of claim 56, further including a gasket mounted between a cable end shoulder located at the cable end of the connector and the corrugated outer conductor.

58. The system of claim 56, wherein the gasket has an internal surface configured to mate with the dual lead helically corrugated outer conductor.

59. The system of claim 56, wherein the mating section is a plurality of ridges that extend radially inward.

60. The system of claim 56, wherein the mating section is a plurality of axial ridges that extend radially inward.

61. The system of claim 56, wherein the mating section is a plurality of wedge shaped ridges that extend radially inward.

62. The system of claim 56, further including a deformation groove between the stop and the helical groove section.

63. The system of claim 62, wherein the mating section is a plurality of ridges that extend radially inward.

64. The system of claim 62, wherein the mating section is a plurality of axial ridges that extend radially inward.

65. The system of claim 62, wherein the mating section is a plurality of wedge shaped ridges that extend radially inward.

66. The system of claim 56, wherein the coaxial cable has a characteristic impedance of about 75 ohms.