CABLE CONNECTOR WITH BUSHING ELEMENT

• US 20120329311A1
• Filed: 06/26/2012
• Published: 12/27/2012
• Est. Priority Date: 06/27/2011
• Status: Active Grant

• Current Assignee: Thomas & Betts International LLC (ABB Limited)
• Original Assignee: Thomas & Betts International Incorporated (ABB Limited)
• Inventors: Duval, Guy, Goyette, Jean-Claude
• Granted Patent: US 8,766,109 B2
• Time in Patent Office: Days
• US Class Current: 439/449
• CPC Class Codes: H01R 13/59 Threaded ferrule or bolt operating in a direction parallel to the cable or wire

Abstract

A cable connector for receiving a cable includes a substantially tubular connector body having a central bore extending therethrough, a forward end, and a cable receiving end. A gland nut is coupled to the cable receiving end of the connector body, wherein the gland nut is axially movable from a first position relative to the connector body to a second position relative to the connector body. A substantially tubular bushing element is secured between the gland nut and the connector body, wherein the bushing element comprises a tubular body for receiving the cable therethrough. The tubular body of the bushing element includes a flexible portion and a semi-rigid portion, wherein the flexible portion comprises a first hardness to seal the flexible portion to the cable and the semi-rigid portion comprises a second hardness to securely fix the cable relative to the bushing element.

Claims

1. A cable connector for receiving a cable, comprising:

a substantially tubular connector body having a central bore extending therethrough, a forward end, and a cable receiving end;

a gland nut coupled to the cable receiving end of the connector body,

wherein the gland nut is axially movable from a first position relative to the connector body to a second position relative to the connector body; and

a bushing element secured between the gland nut and the connector body,

wherein the bushing element comprises a tubular body for receiving the cable therethrough,

wherein the tubular body includes a flexible portion and a semi-rigid portion,

wherein the flexible portion has a first hardness to automatically seal the flexible portion to the cable and the semi-rigid portion has a second hardness to securely fix the cable relative to the bushing element.

2. The cable connector of claim 1, wherein axial movement of the gland nut from the first position to the second position causes inward compression of the semi-rigid portion toward the cable to secure the cable within the cable connector.

3. The cable connector of claim 2, wherein the central bore includes an angled inner surface, and

wherein a forward portion of the semi-rigid portion of the bushing element engages the angled inner surface in the central bore when the gland nut is in the second position.

4. The cable connector of claim 2, wherein the semi-rigid portion further comprises:

a number of resilient fingers projecting axially from the tubular body of the bushing element.

5. The cable connector of claim 4, wherein ends of the resilient fingers together define an inside diameter smaller than an outside diameter of the cable upon axial movement of the gland nut from the first position to the second position.

6. The cable connector of claim 1, wherein the flexible portion comprises a first material and the semi-rigid portion comprises a second material, wherein the first material is different from the second material.

7. The cable connector of claim 6, wherein the first material comprises a rubber-like polymer and the second material comprises a semi-rigid polymer.

8. The cable connector of claim 6, wherein the flexible portion is permanently coupled to the semi-rigid portion.

9. The cable connector of claim 1, wherein the flexible portion of the bushing element further comprises:

an end surface projecting radially inwardly from a rearward end of the rearward portion; and

a seal portion forming a substantially circular opening in the end surface,

wherein an inside diameter of the substantially circular opening in the seal portion is smaller than an outside diameter of the cable.

10. The cable connector of claim 9, wherein the seal portion includes a beveled surface to guide the cable to the circular opening.

11. The cable connector of claim 9, wherein the flexible portion of the bushing element further comprises:

a second seal portion projecting radially inwardly the rearward portion of the bushing element, wherein the second seal portion is positioned axially forward of the seal portion,

wherein the second seal portion includes a second substantially circular opening for receiving the cable therein.

12. The cable connector of claim 1, wherein the gland nut comprises a substantially tubular body having a rearward end, an intermediate portion,

wherein the rearward end of the gland nut is configured to cover the flexible portion in the bushing element.

13. A bushing element for use in a strain relief cable fitting, comprising:

a substantially tubular body comprising a rearward portion and a forward portion,

wherein the tubular body is configured to receive a cable therethrough,

wherein the rearward portion comprises a first hardness to automatically seal the rearward portion to the cable and the forward portion comprises a second hardness to securely fix the cable relative to the bushing element,

wherein the forward portion comprising a compression portion configured to compress toward the cable during installation of the strain relief cable fitting.

14. The bushing element of claim 13, wherein the forward portion further comprises a number of resilient fingers projecting axially from the tubular body.

15. The bushing element of claim 13, wherein the rearward portion comprises a first material and the forward portion comprises a second material, wherein the first material is different from the second material.

16. The bushing element of claim 15, wherein the first material comprises a rubber-like polymer and the second material comprises a semi-rigid plastic.

17. The bushing element of claim 15, wherein the rearward portion is permanently coupled to the forward portion.

18. The bushing element of claim 13, wherein the rearward portion further comprises:

an end surface projecting radially inwardly from a rearward end of the rearward portion; and

a seal portion forming a substantially circular opening in the end surface,

wherein an inside diameter of the substantially circular opening in the seal portion is smaller than an outside diameter of the cable.

19. The bushing element of claim 18, wherein the rearward portion further comprises:

a second seal portion projecting radially inwardly the rearward portion, wherein the second seal portion is positioned axially forward of the seal portion,

wherein the second seal portion includes a second substantially circular opening for receiving the cable therein.