Method of encapsulating an electronic tire tag

• US 6,580,363 B1
• Filed: 06/30/2000
• Issued: 06/17/2003
• Est. Priority Date: 06/30/2000
• Status: Expired due to Term

• 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): Wu, Daniel J.
• Assistant Examiner(s): NGUYEN, HUNG T
• Application Number:
  US09/608,426
• Time in Patent Office: 1,082 Days
• Field of Search: 340/445, 340/447, 340/442, 340/572.1, 340/573.1, 731/462, 731/464, 731/465
• US Class Current: 340/445
• CPC Class Codes: B29D 2030/0072 Attaching fasteners to tyres, e.g. patches, in order to connect devices to tyres
• CPC Class Codes: B29D 2030/0077 Directly attaching monitoring devices to tyres before or after vulcanization, e.g. microchips
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0493 for attachment on the tyre
• CPC Class Codes: H01Q 1/2241 used in or for vehicle tyres

Abstract

A tire tag includes a monitoring package, a battery, and an antenna encapsulated within an encapsulation mold. The antenna is connected to the encapsulation mold so that the antenna does not move during the encapsulation process. The antenna remains spaced apart from the monitoring package but connected to the monitoring package by connectors that are completely surrounded by encapsulation material so that the connectors are protected during the operation of the tire tag. The antenna may be connected to the encapsulation mold by an adhesive, by pins, by an interference fit, or by clips. The connection between the antenna and the monitoring device may be made by soldered wires or by spring loaded connector pins. The method of encapsulating the tire tag in this manner allows the position of the antenna to be precisely known before, during, and after the encapsulation process.

Claims

1. A tire tag for a pneumatic tire, the tire tag adapted to sense at least one engineering of the pneumatic tire;

the tire tag comprising;

a body;

a monitoring package connected to the body;

a plate antenna connected to the body;

the antenna being spaced from the monitoring package;

the body including an encapsulation material; and

the body including an encapsulation mold.

2. The tag of claim 1, wherein the antenna is disposed adjacent the encapsulation mold.

3. The tag of claim 2, wherein the encapsulation mold includes a bottom wall;

the antenna disposed adjacent the bottom wall of the encapsulation mold.

4. The tag of claim 3, wherein the antenna is connected to the bottom wall of the encapsulation mold by an adhesive.

5. The tag of claim 4, wherein the bottom wall has an inner surface and an outer surface.

6. The tag of claim 5, wherein the antenna is disposed adjacent the inner surface of the bottom wall.

7. The tag of claim 5, wherein the antenna is disposed adjacent the outer surface of the bottom wall.

8. The tag of claim 3, wherein the bottom wall includes a plurality of pins;

the antenna being disposed between the pins.

9. The tag of claim 3, further comprising at least one clip;

the antenna being held in position by the clip.

10. The tag of claim 1, wherein the encapsulation mold includes walls;

at least a portion of the antenna being disposed within a wall of the encapsulation mold.

11. The tag of claim 10, wherein a major portion of the antenna is disposed within one of the walls of the encapsulation mold.

12. The tag of claim 10, wherein a portion of the antenna is cantilevered from one of the walls of the encapsulation mold.

13. A method of fabricating a tire tag for a pneumatic tire, the tire tag adapted to sense at least one engineering of the pneumatic tire;

the method comprising the steps of;

(a) providing a monitoring package;

(b) providing a plate antenna;

(c) encapsulating the antenna and monitoring package together in a body where the antenna and monitoring package are spaced from each other;

(d) providing an encapsulation mold having a plurality of walls;

(e) placing the monitoring package and antenna in the encapsulation mold; and

(f) adding encapsulation material to the encapsulation mold.

14. The method of claim 13, further comprising the step of connecting the antenna to one of the walls of the encapsulation mold before the encapsulation material is added to the encapsulation mold.

15. An electronic monitoring device for a pneumatic tire, the electronic monitoring device adapted to sense at least one engineering condition of the pneumatic tire and transmit data associated with the engineering condition outside of the pneumatic tire;

the electronic monitoring device comprising;

a body;

a monitoring package carried by the body;

a plate antenna carried by the body;

the antenna having a length;

the entire length of the antenna being spaced from the monitoring package;

a connector connecting the antenna to the monitoring package;

the body including an encapsulation material; and

the body including an encapsulation mold.

16. The electronic monitoring device of claim 15, wherein the antenna is disposed adjacent the encapsulation mold.

17. An electronic monitor device for a pneumatic tire, the electronic monitoring device adapted to sense at least one engineering condition of the pneumatic tire and transmit data associated with the engineering condition outside of the pneumatic tire;

the electronic monitoring device comprising;

a body;

a monitoring package carried by the body;

an antenna carried by the body;

the antenna being entirely disposed within the body;

the antenna adapted to receive signals and to transmit signals from the tire;

the antenna being spaced from the monitoring package;

the body including an encapsulation material; and

an encapsulation mold;

the encapsulation mold being directly connected to the encapsulation material.

18. The electronic monitoring device of claim 17, wherein the encapsulation mold includes at least one sidewall and a bottom wall connected to the sidewall.

19. The electronic monitoring device of claim 18, wherein the antenna is disposed adjacent one of the bottom wall and sidewall of the encapsulation mold.

20. A tire tag for a pneumatic tire, the tire tag adapted to sense at least one engineering of the pneumatic tire;

the tire tag comprising;

a body;

a monitoring package connected to the body;

an antenna connected to the body;

the antenna being spaced from the monitoring package;

a power source connected to the body;

the power source being spaced from the monitoring package;

the body including an encapsulation material; and

an encapsulation mold connected to the body;

the monitoring package being spaced from the encapsulation mold.

21. The tag of claim 20, wherein the power source is spaced from the antenna.

22. The tag of claim 20, wherein the body has outer walls;

the monitoring package being spaced from the outer walls of the body.

23. A tire tag for a pneumatic tire, the tire tag adapted to sense at least one engineering of the pneumatic tire;

the tire tag comprising;

a body including an encapsulation material;

the body having outer surfaces;

a monitoring package connected to the body;

the monitoring package being spaced from the outer surfaces of the body;

an antenna connected to the body;

the antenna being spaced from the monitoring package; and

an encapsulation mold connected to the body;

the monitoring package being spaced from the encapsulation mold.

24. The tag of claim 23, wherein the body includes a lower surface adapted to be connected to the pneumatic tire;

the antenna being disposed intermediate the lower surface and the monitoring package.

25. The tag of claim 24, further comprising a power source carried by the body;

the power source being spaced from the monitoring package.

26. The tag of claim 25, wherein the antenna is a plate antenna.

27. A tire tag for a pneumatic tire, the tire tag adapted to sense at least one engineering of the pneumatic tire;

the tire tag comprising;

a body including an encapsulation material;

the body including a lower surface adapted to be connected to the pneumatic tire;

a monitoring package connected to the body;

an antenna connected to the body;

the antenna being spaced from the monitoring package;

the antenna being disposed intermediate the lower surface of the body and the monitoring package; and

an encapsulation mold connected to the body.

28. The tag of claim 27, wherein the encapsulation mold includes a bottom wall disposed at the lower surface of the body.