Electrical connectors with improved electrical contact performance

• US 7,914,351 B2
• Filed: 04/14/2008
• Issued: 03/29/2011
• Est. Priority Date: 04/13/2007
• Status: Active Grant

• Current Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Original Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Inventors: Sjostedt, Robbie J., Balsells, Peter J., Dilmaghanian, Farshid
• Primary Examiner(s): Gushi; Ross N
• Application Number:
  US12/102,626
• Publication Number:
  US 20080254670A1
• Time in Patent Office: 1,079 Days
• Field of Search: 439/349, 439/840, 439/841, 439/931
• US Class Current: 439/840
• CPC Class Codes: H01R 11/286 having means for improving contact between battery post and clamping member, e.g. uneven interior surface
• CPC Class Codes: H01R 13/03 characterised by the material, e.g. plating, or coating materials
• CPC Class Codes: H01R 13/187 with spring member in the socket
• CPC Class Codes: H01R 43/16 for manufacturing contact members, e.g. by punching and by bending
• CPC Class Codes: Y10S 439/931 Conductive coating
• CPC Class Codes: Y10T 29/49204 Contact or terminal manufacturing
• CPC Class Codes: Y10T 29/49222 forming array of contacts or terminals
• CPC Class Codes: Y10T 29/49224 with coating

Abstract

Electrical connectors are generally discussed herein having a housing having a bore and a groove having a canted coil spring positioned therein. A pin is inserted through the bore and is electrically connected with the canted coil spring. The canted coil spring may be coated with a noble metal and the housing and the pin may be made from non-noble metals.

Claims

1. An electrical connector with improved dynamic resistance comprising:

a housing having a bore and a groove having a canted coil spring positioned therein; and

a pin inserted through the bore and in electrical communication with the canted coil spring;

wherein the spring has an inner core and an outer layer having different material compositions, with the outer layer comprising at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium, the outer layer having sufficient thickness to provide the spring with an electrical resistance that is within 20% or less of a spring made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

2. The electrical connector of claim 1, wherein the pin or the groove of the housing comprises a surface area of a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium.

3. The electrical connector of claim 1, wherein the inner core comprises a material that does not include platinum, iridium, rhodium, rheniun ruthenium or al1adium.

4. The electrical connector of claim 3, wherein the inner core is made from a nickel alloy or a stainless steel material.

5. The electrical connector of claim 1, wherein the spring is a radial canted coil spring.

6. The electrical connector of claim 1, wherein the outer layer provides the spring with an electrical resistance that is within 10% or less of a spring made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

7. The electrical connector of claim 6, wherein the outer layer provides the spring with an electrical resistance that is within 6% or less of a spring made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

8. A method for manufacturing an electrical connector comprising:

providing a housing having a bore and a groove for receiving a canted coil spring;

coating an inner core of a canted coil spring with an outer layer comprising at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium, the inner core comprising a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium;

inserting the canted coil spring into the groove; and

inserting a pin through the bore and the spring;

wherein the outer layer has a thickness sufficient to provide the spring with an electrical resistance that is at least 30% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

9. The method of claim 8, wherein the outer layer is coated over an inner core comprising a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium.

10. The method of claim 9, wherein the inner core is a nickel alloy metal or a stainless steel material.

11. The method of claim 9, wherein the inner core is nickel alloy or stainless steel.

12. The method of claim 8, wherein the housing is made from a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium.

13. The method of claim 8, wherein the housing is made from at least two different housing sections.

14. The method of claim 8, wherein the pin comprises a groove.

15. The method of claim 8, wherein the outer layer has a thickness sufficient to provide the spring with an electrical resistance that is at least 40% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

16. The method of claim 15, wherein the outer layer has a thickness sufficient to provide the spring with an electrical resistance that is at least 50% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

17. A method for placing at least one of platinum, iridium, rhodium, rhenium, ruthenium or palladium between two surfaces of an electrical connector, the two surfaces comprising materials that do not include platinum, iridium, rhodium, rhenium, ruthenium or palladium, the method comprising:

providing a housing having a groove having a surface made from a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium;

placing a canted coil spring having an inner core comprising a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium and an outer surface area made from at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium into the groove, the outer surface area providing the canted coil spring with an electrical resistance that is within 20% or less of a sprine made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium, and is at least 30% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium; and

placing a pin having an outer surface area made from a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium in contact with the canted coil spring.

18. The method of claim 17, wherein the spring outer surface area is coated over an inner core comprising a material that does not include platinum, iridium, rhodium, rhenium, ruthenium or palladium.

19. The method of claim 18, wherein the inner core is nickel alloy or stainless steel.

20. The method of claim 17, wherein the housing comprises two side walls, at least one of which made from a separately formed housing section.

21. The method of claim 17, wherein the pin is part of a battery terminal.

22. The method of claim 17, wherein the housing comprises an exterior surface attached to a lead conductor.

23. The method of claim 17, wherein the groove comprises a generally V-shape wall surface.

24. The method of claim 17, wherein the outer surface area provides the canted coil spring with an electrical resistance that is within 10% or less of a spring made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium, and is at least 40% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium.

25. The method of claim 24, wherein the outer surface area provides the canted coil spring with an electrical resistance that is within 6% or less of a spring made entirely of at least one of platinum, iridium, rhodium, rhenium, ruthenium and palladium, and is at least 50% less than an electrical resistance of a spring that is made from one or more materials not including any of platinum, iridium, rhodium, rhenium, ruthenium and palladium.