Electrical connector using a canted coil multi-metallic wire

• US 9,293,849 B2
• Filed: 07/29/2009
• Issued: 03/22/2016
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Original Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Inventors: Balsells, Pete, Sjostedt, Rob, Dilmaghanian, Farshid
• Primary Examiner(s): GIRARDI, VANESSA MARY
• Application Number:
  US12/511,518
• Publication Number:
  US 20100029145A1
• Time in Patent Office: 2,428 Days
• Field of Search: 439/827, 439/349, 439/840, 439/841, 439/909, 439/675, 298/969
• US Class Current: 1/1
• CPC Class Codes: H01R 13/03 characterised by the material, e.g. plating, or coating materials
• CPC Class Codes: H01R 13/17 with spring member on the pin
• CPC Class Codes: H01R 13/187 with spring member in the socket
• CPC Class Codes: H01R 13/2421 using coil springs
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 24/58 Contacts spaced along longitudinal axis of engagement
• CPC Class Codes: H01R 39/20 characterised by the material thereof

Abstract

A canted coil spring made from multi-metallic wire to achieve combinations of desired material characteristics of different metals is discussed. Wire to be used in canted coil springs can have two or more metals oriented co-axially along such wire, such as an outer layer of one metal having one set of properties, and a core of a different metal having a different set of properties, that will achieve a single solid, multi-metallic wire with enhanced performance over a single material canted coil spring. Such features may be found advantageous in electrical applications, such as where both high electrical conductivity and high strength properties are desired.

Claims

1. A method for connecting and conducting electricity between a first body and a second body in an application above 200 degrees Celsius comprising:

inserting an elongated body of the second body comprising an external groove into a bore of the first body comprising an internal groove;

positioning a canted coil spring comprising a plurality of coils in a common groove defined by the first body and the second body so that the plurality of coils contact the external groove and the internal groove; and

applying electrical current between the first body and the second body and through the spring;

exposing the first body and the second body to a temperature greater than 210 degrees Celsius; and

wherein said spring comprising an inner core made from a highly electrically conductive material with a circumference and a secondary layer outside the core and completely surrounding the circumference of the core;

said secondary layer comprising a high modulus and high tensile strength material.

2. The method of claim 1, wherein the core is made from a copper material.

3. The method of claim 1, wherein the plurality of coils contact two sidewalls of the internal groove.

4. The method of claim 1, wherein the secondary layer is at least one of coated and co-drawn with or to the inner bore.

5. The method of claim 1, wherein the spring has two ends that are spaced from one another.

6. The method of claim 1, wherein the first body and the second body are disposed in a wind turbine comprising at least one rotatable blade.

7. The method of claim 1, wherein at least one of the first body and the second body is plated with a conductive material.

8. The method of claim 1, wherein the first body or the second body is directly or indirectly connected to a battery terminal.

9. The method of claim 8, wherein the battery terminal is located in a water bearing vessel.

10. The method of claim 1, wherein the internal groove of the first body comprises two sidewalls and a bottom wall that tapers relative to the two sidewalls.

11. The method of claim 10, wherein the external groove of the second body comprises two sidewalls and a bottom wall located therebetween.

12. The method of claim 11, wherein the first body comprises an internal groove comprising two sidewalls and a bottom wall having a flat bottom surface.

13. The method of claim 1, further comprising an outer layer surrounding the secondary layer.

14. The method of claim 13, wherein the outer layer is made from a corrosion resistant material comprising titanium.

15. The method of claim 13, wherein the spring is a radial canted coil spring.

16. The method of claim 13, wherein the secondary layer comprises steel and the outer layer is a highly corrosion resistant metal.

17. The method of claim 16, wherein the outer layer comprises silver or titanium.

18. A method for transferring electrical current between a first member and a second member at a temperature of 210 degrees Celsius or higher, the method comprising:

providing a common groove defined by surfaces of the first member and the second member,

disposing a multi-metallic canted coil spring comprising a plurality of coils in the common groove, said multi-metallic canted coil spring functions as a conduit for electrical conduction between the first member and the second member;

causing current to flow between the first member and the second member and through the canted coil spring;

exposing the first member, the second member, and the canted coil spring to a temperature of 210 degrees Celsius or higher; and

wherein the canted coil spring includes an inner core made from a highly electrically conductive material comprising a circumference and a secondary layer outside the core and completely surrounding the circumference of the core;

said secondary layer comprising a high modulus and high tensile strength material.

19. The method of claim 18, further comprising connecting a lead cable to at least one of the first member and the second member for carrying electrical current across a disconnectable interface.

20. The method of claim 18, wherein said canted coil spring has a wire outside diameter of less than 0.0035 inch, a spring ring inside diameter of less than 0.050 inch.

21. The method of claim 18, further comprising an outer layer surrounding the secondary layer.

22. The method of claim 18, wherein the core comprises copper.

23. The method of claim 22, wherein the secondary layer comprises steel.

24. The method of claim 23, further comprising a tertiary layer of a highly corrosion resistant metal outside and completely surrounding the secondary layer.

25. The method of claim 24, wherein the tertiary layer comprises silver or titanium.