Variable canted coil spring cross section

• US 8,753,153 B2
• Filed: 07/10/2012
• Issued: 06/17/2014
• Est. Priority Date: 09/15/2009
• Status: Active Grant

• Current Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Original Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Inventors: Leon, Gordon
• Primary Examiner(s): Luebke, R S
• Assistant Examiner(s): PATEL, HARSHAD C
• Application Number:
  US13/545,595
• Publication Number:
  US 20120295471A1
• Time in Patent Office: 707 Days
• Field of Search: 439/840, 439/841, 439/843, 439/448, 439/578, 439581-585, 439/595, 277/163, 277/166
• US Class Current: 439/840
• CPC Class Codes: B21F 1/00 Bending wire other than coiling; Straightening wire
• CPC Class Codes: B21F 35/00 Making springs from wire by coiling wire B21F3/00; making resilient rings B21F37/02
• CPC Class Codes: B21F 35/02 Bending or deforming ends of coil springs to special shape
• CPC Class Codes: F16F 1/045 Canted-coil springs
• CPC Class Codes: Y10T 29/49204 Contact or terminal manufacturing
• CPC Class Codes: Y10T 29/49609 Spring making

Abstract

A canted coil spring includes a plurality of canted coils generally canted relative to a centerline extending through the coils. At least one coil when viewed in the direction of the centerline appears to have a non-elliptical shape and a non-circular shape when the at least one coil is in the unbiased state. The plurality of coils is generally canted at a first coil angle relative to the center line. The at least one coil includes at least one section canted at a second coil angle relative to the centerline. The second coil angle is different from the first coil angle when the at least one coil is in an unbiased state.

Claims

1. An electrical connector comprising:

a housing made, at least in part, from an electrically conductive material comprising a bore and a groove located within the bore, said groove comprising two sidewalls and a bottom wall located therebetween;

a pin made from an electrically conductive material comprising an elongated body positioned within the bore; and

a canted coil spring positioned in the groove of the housing and contacting the pin, the canted coil spring comprising a plurality of canted coils generally canted in a first direction relative to a centerline extending through the coils;

wherein at least two of the plurality of canted coils, each when viewed in a direction of the centerline, comprises a curved first section along a first path and defining a first contact surface area when contacting a flat surface, the first section being formed continuously with a second section bent in a second direction defining a second path different from the first path so as to define a second contact surface area that is larger than the first contact surface area between the second section and at least one of the housing and the pin.

2. The electrical connector of claim 1, wherein the at least two coils, each when viewed in the direction of the centerline, comprises at least one linear segment that provides the second contact surface area between the second section and at least one of the housing and the pin, the second contact surface area being defined along a line.

3. The electrical connector of claim 1, wherein the plurality of coils comprise at least one coil that, when viewed in the direction of the centerline, comprises an elliptical shape or a circular shape.

4. The electrical connector of claim 1, wherein the groove is a first groove, the connector further comprising a second groove comprising two sidewalls and a bottom wall located therebetween formed on the pin and having the canted coil spring positioned therein.

5. The electrical connector of claim 4, wherein the bottom wall of the second groove is tapered relative to at least one of the two sidewalls of the second groove.

6. The electrical connector of claim 1, wherein the second section contacts the groove of the housing, and wherein a third section on each of the at least two canted coils is bent in a third direction different from the first and second directions and defining a third path different from the first and second paths so as to define a third contact surface area that is larger than the first contact area at which to contact the pin.

7. The electrical connector of claim 6, wherein the third section contacts a bottom wall of a groove formed on the pin.

8. The electrical connector of claim 1, wherein the bottom wall of the groove of the housing is tapered relative to at least one of the two sidewalls.

9. An electrical connector comprising:

a pin comprising an elongated body having a groove comprising two sidewalls and a bottom wall located therebetween;

a housing comprising a bore having the pin positioned therein; and

a canted coil spring located in the groove comprising;

a plurality of canted coils generally canted in a first direction relative to a center line extending through the coils;

wherein at least two of the plurality of canted coils, each when viewed in a direction of the centerline, comprises a curved first section along a first path and defining a first contact surface area when contacting a flat surface, the first section being formed continuously with a second section bent in a second direction defining a second path different from the first path so as to define a second contact surface area that is larger than the first contact surface area between the second section and at least one of the housing and the pin.

10. The electrical connector of claim 9, wherein the at least two coils, each when viewed in the direction of the centerline, comprises at least one linear segment that provides the second contact surface area between the second section and at least one of the housing and the pin, the second contact surface area being defined along a line.

11. The electrical connector of claim 9, wherein the plurality of coils comprise at least one coil that, when viewed in the direction of the centerline, comprises an elliptical shape or a circular shape.

12. The electrical connector of claim 9, wherein the groove is a first groove, the electrical connector further comprising a second groove comprising two sidewalls and a bottom wall located therebetween formed in the bore of the housing and having the canted coil spring positioned therein.

13. The electrical connector of claim 12, wherein the bottom wall of the second groove is tapered relative to at least one of the two sidewalls of the second groove.

14. The electrical connector of claim 9, wherein the second section contacts the groove of the pin and wherein a third section on each of the at least two canted coils is bent in a third direction different from the first direction so as to contact the housing.

15. The electrical connector of claim 14, wherein the groove is a first groove, wherein a second groove having a bottom wall is formed in the housing, and wherein the third section contacts the bottom wall of the second groove.

16. The electrical connector of claim 9, wherein the bottom wall of the groove of the pin is tapered relative to at least one of the two sidewalls.

17. A method for increasing the area of surface contacts in an electrical connector, the method comprising:

fabricating a wire in a canted helical configuration thereby forming a plurality of coils canted in a first direction relative to a centerline extending through the coils, wherein at least one coil of the plurality of coils, when viewed in a direction of the center line, comprises a curved first section along a first path and defining a first contact surface area when contacting a flat surface;

bending at least one section of the at least one coil in a second direction to form a second section that is continuous with the first section, wherein the second direction defines a second path different from the first path so as to define a second contact surface area that is larger than the first contact surface area; and

placing the plurality of coils in a groove comprising two sidewalls and a bottom wall so that the second section of the at least one coil contacts the bottom wall along the second contact surface area.

18. The method of claim 17, comprising bending at least another section of the at least one coil to form a third section bent in a third direction different from the first direction.

19. The method of claim 18, wherein the groove is located in a bore of the housing.

20. The method of claim 19, wherein the third section contacts a bottom wall of a groove formed on a pin positioned in the bore.

21. An electrical connector, comprising:

a housing defining a bore;

a pin positioned longitudinally in the bore;

at least one of the housing and the pin defining a groove communicating with the bore; and

a canted coil spring disposed in the groove so as to contact the housing and the pin, the spring comprising a plurality of coils canted in a first direction relative to a center line extending through the coils;

wherein each of at least two of the plurality of coils, when viewed in a direction of the centerline, comprises a curved first section defining a first contact surface area between the first section and at least one of the housing and the pin, the first section being continuous with a second section angled in a second direction different from the first direction so as to provide a second contact surface area between the second section and at least one of the housing and the pin, the second contact surface area being larger than the first contact surface area.

22. The electrical connector of claim 21, wherein the groove is defined in the housing.

23. The electrical connector of claim 21, wherein the groove is defined in the pin.

24. The electrical connector of claim 21, wherein the second section provides a first contact surface area defined along a first line on the housing, and wherein each of the at least two coils includes a third section continuous with the first section and bent in a third direction different from the first direction and defining a second contact area defined along a second line on the pin.

25. The electrical connector of claim 21, wherein the second contact surface area is defined along a line.