Method of providing electrical power to an embedded electronic device in a tire using close proximity electromagnetic coupling

• US 6,371,178 B1
• Filed: 03/09/2000
• Issued: 04/16/2002
• Est. Priority Date: 03/09/2000
• Status: Active Grant

• Current Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Inventors: Wilson, Paul B.
• Primary Examiner(s): Aftergut, Jeff H.
• Assistant Examiner(s): FISCHER, JUSTIN R
• Application Number:
  US09/522,431
• Time in Patent Office: 768 Days
• Field of Search: 152/152.1, 731/465, 731/46, 156/123, 156/110.1, 340/443, 340/447
• US Class Current: 152/152.1
• CPC Class Codes: B60C 23/041 Means for supplying power to the signal- transmitting means on the wheel
• CPC Class Codes: B60C 23/0493 for attachment on the tyre
• CPC Class Codes: H01Q 1/2241 used in or for vehicle tyres
• CPC Class Codes: Y10T 152/10009 Emergency
• CPC Class Codes: Y10T 152/10027 with wear indicating feature

Abstract

A method and apparatus for connecting an electronic monitoring device to a pneumatic tire includes mounting the monitoring package of the monitoring device within the body of the tire or the body of a patch and subsequently connecting the power source to the monitoring package through electrical coupling. The method allows the monitoring package to be cured within the tire or the patch at relatively high temperatures while protecting the sensitive power source from the high temperatures. The use of electrical coupling to achieve the power transfer prevents the material surrounding the monitoring package from being pierced by an element that would form the direct electrical connection. The method allows the monitoring package and its antenna to be positioned in a variety of positions on or within the pneumatic tire.

Claims

1. In combination, a pneumatic tire having a body and a monitoring device having a monitoring package, a power source, a first coupling element, and a second coupling element;

the first coupling element connected to the power source;

the second coupling element connected to the monitoring package;

the monitoring device and the power source being mounted to the pneumatic tire; and

the first and second coupling elements being aligned and spaced apart whereby power is supplied to the monitoring package from the power source.

2. The combination of claim 1, further comprising an attachment patch mounting the monitoring package to the pneumatic tire.

3. The combination of claim 2, wherein the monitoring package is connected to the outer surface of the attachment patch.

4. The combination of claim 3, further comprising a patch connected to the power source;

the patch connecting the power source to the attachment patch.

5. The combination of claim 2, wherein the monitoring package is embedded within the body of the attachment patch.

6. The combination of claim 5, further comprising a patch connected to the power source;

the patch connecting the power source to the attachment patch.

7. The combination of claim 1, further comprising an anchoring patch mounting the monitoring package to the pneumatic tire.

8. The combination of claim 7, wherein the monitoring package is connected to the outer surface of the anchoring patch.

9. The combination of claim 8, further comprising a patch connected to the power source;

the patch connecting the power source to the anchoring patch.

10. The combination of claim 7, wherein the monitoring package is embedded within the body of the anchoring patch.

11. The combination of claim 10, further comprising a patch connected to the power source;

the patch connecting the power source to the anchoring patch.

12. The combination of claim 1, wherein the pneumatic tire includes an innerliner.

13. The combination of claim 12, wherein the monitoring package is connected to the surface of the innerliner.

14. The combination of claim 12, wherein the monitoring package is embedded within the innerliner.

15. The combination of claim 12, wherein the pneumatic tire also includes a sidewall having a body ply.

16. The combination of claim 15, wherein the monitoring package is disposed between the body ply and the innerliner.

17. The combination of claim 15, wherein the body ply is disposed between the monitoring package and the innerliner.

18. The combination of claim 15, wherein the sidewall includes a reinforcing cord ply.

19. The combination of claim 18, wherein the monitoring package is disposed between the body ply and the reinforcing cord ply.

20. The combination of claim 18, wherein the reinforcing cord ply is disposed between the monitoring package and the body ply.

21. The combination of claim 1, wherein the first and second coupling elements are coils.

22. The combination of claim 1, wherein the first and second coupling elements are pads.

23. A method of mounting an electronic monitoring package to a pneumatic tire comprising the steps of:

(a) providing a pneumatic tire having a body;

(b) providing a power source having a first coupling element connected to the power source;

(c) providing an electronic monitoring package having a second coupling element connected to the electronic monitoring package;

(d) mounting the electronic monitoring package to the pneumatic tire; and

(e) mounting the power source to the pneumatic tire in a position where the first and second coupling elements are spaced apart and aligned to provide power from the power source to the monitoring package.

24. The method of claim 23, wherein the step of mounting the electronic monitoring package to the pneumatic tire occurs before the pneumatic tire is cured.

25. The method of claim 24, wherein the pneumatic tire includes a body ply and an innerliner and wherein step (d) includes the step of embedding the monitoring package within the body of the tire.

26. The method of claim 25, further comprising the step of positioning the monitoring package in the innerliner of the tire.

27. The method of claim 25, further comprising the step of positioning the monitoring package between the innerliner and the body ply.

28. The method of claim 25, wherein the tire includes a reinforcing cord ply and further comprising the step of positioning the monitoring package between the reinforcing cord ply and the body ply.

29. The method of claim 25, wherein the tire includes a reinforcing cord ply and further comprising the step of positioning the monitoring package in the tire such that the reinforcing cord ply is disposed between the monitoring package and the body ply.

30. The method of claim 23, wherein step (e) includes the step of mounting the power source to a patch before the power source is mounted to the tire.

31. A method of mounting an electronic monitoring package to a patch comprising the steps of:

providing a patch;

providing a power source having a first coupling element connected to the power source;

providing an electronic monitoring package having a second coupling element connected to the electronic monitoring package;

mounting the electronic monitoring package to the patch; and

mounting the power source to the patch in a position where the first and second coupling elements are spaced apart and aligned to provide power from the power source to the monitoring package.

32. The method of claim 31, wherein the step of mounting the electronic monitoring package to the patch occurs before the patch is cured.

33. The method of claim 32, further comprising the step of embedding the electronic monitoring package in the patch before the patch is cured.

34. The method of claim 31, wherein the patch is cured before the power source is mounted to the patch.

35. The method of claim 31, further comprising the step of mounting the patch to a pneumatic tire.

36. The method of claim 35, further comprising the step of curing the tire and the patch after the patch is mounted to the tire.