Canted-coil spring with major axis radial loading

• US 4,974,821 A
• Filed: 05/08/1989
• Issued: 12/04/1990
• Est. Priority Date: 04/25/1988
• Status: Expired due to Term

• Current Assignee: Bal Seal Engineering Incorporated (Kaman Corporation)
• Original Assignee: Joan C. Balsells, Peter J. Balsells
• Inventors: Balsells, Peter J.
• Primary Examiner(s): Butler, Douglas C.
• Application Number:
  US07/348,419
• Time in Patent Office: 575 Days
• Field of Search: 267/167, 267/1.5, 267/180, 277/164, 277/163, 277/205, 277/153, 285/318, 285/305, 285/306, 285/321, 403/326, 403/334, 403/225, 403/361, 403/368
• US Class Current: 267/167
• CPC Class Codes: F16F 1/04 Wound springs making springs by coiling wire B21F3/00
• CPC Class Codes: F16F 1/045 Canted-coil springs
• CPC Class Codes: F16J 15/025 and with at least one flexible lip
• CPC Class Codes: F16J 15/0893 the packing having a hollow profile
• CPC Class Codes: F16J 15/344 the pressing force being applied by means of an elastic ring supporting the slip-ring

Abstract

A canted-coil spring includes a plurality of coils having a major and a minor axis and canted along a centerline defined by an intersection of the major and minor axis. The coils are interconnected in a manner forming a garter-type resilient canted-coil spring and a back angle of each coil, both defines the disposition of a trailing portion of each coil and determines the load-deflection characteristics of the canted-coil spring. A front angle defines the disposition of a leading portion of each coil and the garter-type resilient canted-coil spring is oriented for enabling the loading thereof to be generally radial in direction and along the major axis thereof.

Claims

1. Canted coil spring apparatus comprising:

a plurality of coils having a major and a minor axis and canted along a centerline defined by an intersection of the major and minor axis, said coils being interconnected in a manner forming a garter-type axially resilient canted coil spring;

back angle means for both defining the disposition of a trailing portion of each coil with respect to a line normal to the centerline and for determining the load-deflection characteristics of the canted coil spring;

front angle means for defining the disposition of a leading portion of each coil with respect to the normal line, said front angle means being greater than said back angle means; and

means for non-invasively supporting the garter-type axially resilient coiled spring in a preselected orientation for controlling the resilient characteristics of the garter-type axially resilient canted coil spring, said last recited means including means defining a cavity for enabling said garter-type axially resilient coil spring to be loaded along the major axis thereof and cant along the major axis thereof.

3. The canted coil spring apparatus according to claims 1 or 2 wherein the trailing portion is disposed along an outside diameter of the garter-type axially resilient canted coil spring and the leading portion is disposed along an inside diameter of the garter-type axially resilient coiled spring.

4. The canted coil spring apparatus according to claims 1 or 2 wherein the trailing portion is disposed along an inside diameter of the garter-type spring resilient coiled spring and the leading portion is disposed along an outside diameter of the garter-type axially resilient coiled spring.

5. The canted coil spring apparatus according to claim 1 wherein the back angle is selected to provide a load-deflection characteristics in which the load remains relatively constant within a working deflection.

6. The canted coil spring apparatus according to claim 1 wherein the back angle means defines the trailing portion at a disposition with a back angle, with respect to the normal line of greater than zero degrees.

7. The canted coil spring apparatus according to claim 6 wherein the front angle means defines the leading portion at a disposition with a front angle, with respect to the normal line of greater than zero degrees.

8. The canted coil spring apparatus according to claim 1 wherein said means for non-invasively supporting the garter-type springs includes means defining a groove having tapered walls for causing axial loading of the canted coil spring upon radial loading thereof.

2. Canted coil spring apparatus comprising:

a plurality of coils having a major and a minor axis and canted along a centerline defined by an intersection of the major and minor axis, said coils being interconnected in a manner forming a garter-type axially resilient canted coil spring;

back angle means for both defining the disposition of a trailing portion of each coil with respect to a line normal to the centerline and for determining the load-deflection characteristics of the canted coil spring;

front angle means for defining the disposition of a leading portion of each coil with respect to the normal line, said front angle means being greater than said back angle means; and

means for non-invasively supporting the garter-type axially resilient coiled spring in a preselected orientation for controlling the resilient characteristics of the garter-type axially resilient canted coil spring, said last recited means including means defining a cavity to enable said garter-type axially resilient coil spring to be loaded along both the major and the minor axis thereof.

9. Canted coil spring apparatus comprising:

a plurality of coils having a major and a minor axis and canted along a centerline defined by an intersection of the major and minor axis, said coils being interconnected in a manner forming a garter-type axially resilient canted coil spring;

back angle means for both defining the disposition of a trailing portion of each coil with respect to a line normal to the centerline and for determining the load-deflection characteristics of the canted coil spring;

front angle means for defining the disposition of a leading portion of each coil with respect to the normal line, said front angle means being greater than said back angle means; and

means for orienting said garter-type resilient canted coil spring and enabling loading thereof along the major axis thereof.

10. The canted coil spring apparatus according to claim 9 wherein said means for orienting said garter-type axially resilient coil spring includes means defining a cavity for enabling said garter-type axially resilient coil spring to be loaded along the major axis thereof and cant along the major axis thereof.

11. The canted coil spring apparatus according to claim 9 wherein said means for orienting said garter-type axially resilient coil spring includes means defining a cavity for enabling said garter-type axially resilient coil spring to be loaded along both the major and the minor axis thereof.

12. The canted coil spring apparatus according to claim 9 wherein said means for orienting said garter-type axially resilient coil spring includes means defining a cavity for supporting and orienting said garter-type axially resilient coiled springs with a turn angle of greater than zero degrees and less than 90 degrees.

13. The canted coil spring apparatus according to claims 9, 10, 11 or 12 wherein the trailing portion is disposed along an outside diameter of the garter-type axially resilient coiled spring and the leading portion is disposed along an inside diameter of the garter-type axially resilient coiled spring.

14. The canted coil spring apparatus according to claims 9, 10, 11 or 12 wherein the trailing portion is disposed along an inside diameter of the garter-type axially resilient coiled spring and the leading portion is disposed along an outside diameter of the garter-type axially resilient coiled spring.

15. The canted coil spring apparatus according to claim 9 wherein the means for orienting said garter-type axially resilient coiled spring includes means for enabling spring deflection to occur on the inside diameter thereof.

16. The canted coil spring apparatus according to claim 9 wherein the means for orienting said garter-type axially resilient coiled spring includes means for enabling spring deflection to occur on the outside diameter thereof.

17. The canted coil spring apparatus according to claim 9 wherein the back angle is selected to provide a load-deflection characteristics in which the load remains relatively constant within a working deflection.

18. The canted coil spring apparatus according to claim 9 wherein the back angle means defines the trailing portion at a disposition with a back angle, with respect to the normal line, of greater than zero degrees.

19. The canted coil spring apparatus according to claim 18 wherein the front angle means defines the leading portion at a disposition with a front angle, with respect to the normal line, of greater than zero degrees.

20. The canted coil spring apparatus according to claim 9 further comprising means defining spacing between each coil in said plurality of coils, for enabling the coils to abutt upon loading thereof.

21. The canted coil spring apparatus according to claim 20 wherein said means for orienting said garter-type spring includes means defining a groove having tapered wall, for causing axial loading of the canted coil spring upon radial loading thereof.

22. The canted coil spring apparatus according to claim 9 wherein said coils are interconnected to form a radial canted coil spring.

23. The canted coil spring apparatus according to claim 9 wherein said coils are interconnected to form an axially canted coil spring.