Combination pneumatic tire and monitoring device

• US 6,668,884 B2
• Filed: 08/07/2001
• Issued: 12/30/2003
• Est. Priority Date: 12/04/1998
• Status: Active Grant

• Current Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Inventors: Koch, Russell W., Wilson, Paul B.
• Primary Examiner(s): Ball, Michael W.
• Assistant Examiner(s): Haran, John T.
• Application Number:
  US09/923,504
• Publication Number:
  US 20010045250A1
• Time in Patent Office: 875 Days
• Field of Search: 152/152.1, 340/442
• US Class Current: 152/152.1
• 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 23/0493 for attachment on the tyre
• CPC Class Codes: Y10T 152/10027 with wear indicating feature

Abstract

An attachment between a monitoring device and an innerliner of a tire includes the use of an epoxy adhesive that bonds the monitoring device directly to the inner surface of the innerliner of the tire. The innerliner is first roughened in a manner that provides a roughened portion of the innerliner without removing the entire thickness of the innerliner. The entire thickness of the innerliner is not removed because the innerliner is preferably more than {fraction (1/16)} of an inch thick. The thickness of the innerliner allows the rigid cured epoxy to bond the monitoring device to the inner surface of the innerliner while allowing the innerliner to flex with the tire so as to not break the seal between the rigid epoxy and the innerliner. The monitoring device is preferably located at a low flex area of the tire to help avoid the problem of the innerliner flexing.

Claims

1. In combination, a pneumatic article and a monitoring device mounted to the pneumatic article;

the combination comprising;

a pneumatic article having an inner chamber, the inner chamber being lined with an innerliner;

said innerliner being at least about 0.06 inch thick;

a monitoring device having a bottom surface;

an adhesive compatible with the surface of the innerliner and the bottom surface of the monitoring device, the adhesive capable of curing at 100°

C. and lower, said adhesive adhering said monitoring device to the innerliner of the pneumatic article;

the adhesive being rigid when the adhesive is cured.

2. The combination of claim 1 wherein the pneumatic article is an off-the-road, truck or bus tire.

3. The combination of claim 2 wherein the adhesive is an amine-cured epoxy.

4. The combination of claim 3 wherein the adhesive includes epoxy and amine curative having a ratio of 2.5 parts epoxy to one part amine curative.

5. The combination of claim 1 wherein the monitoring device is encapsulated with an epoxy to provide an encapsulated monitoring device having a bottom surface, said bottom surface being adhered to the innerliner.

6. The combination of claim 5 wherein the monitoring device is an active electronic monitoring device.

7. The combination of claim 6 wherein the active electronic monitoring device includes a microprocessor, a pressure sensor, and a battery.

8. The combination of claim 5 wherein the bottom surface of the encapsulated monitoring device is textured to increase the surface area.

9. The combination of claim 1 wherein the inner surface of the innerliner at which the monitoring device is adhered to is roughened.

10. The combination of claim 9 wherein the adhesive rigidly bonds to the roughened surface of the innerliner allowing the innerliner to flex without breaking the bond of the adhesive.

11. The combination of claim 10 wherein the monitoring device is located at a low flex area of the pneumatic device.

12. The combination of claim 11 wherein the innerliner is at least {fraction (1/8 )}inch thick.

13. In combination, a pneumatic tire and a monitoring device adapted to monitor at least one engineering condition of the pneumatic tire when the pneumatic tire is in use on a vehicle;

the combination comprising;

a pneumatic tire having an inner chamber;

the pneumatic tire having an innerliner defining the inner surface of the pneumatic tire;

the innerliner being at least 0.06 inch thick;

a monitoring device having at least one sensing element adapted to monitor an engineering condition of the pneumatic tire;

the monitoring device having an outer surface;

an adhesive compatible with the innerliner and the outer surface of the monitoring device;

the adhesive being rigid when cured; and

the rigid cured adhesive disposed between the monitoring device and the innerliner to connect the monitoring device to the pneumatic tire.

14. The combination of claim 13, wherein the pneumatic tire is an off-the-road truck or bus tire.

15. The combination of claim 13, wherein the adhesive is an amine-cured epoxy.

16. The combination of claim 15, wherein the adhesive includes epoxy and amine-curative having a ratio of 2.5 parts epoxy to one part amine-curative.

17. In combination, a pneumatic tire and a monitoring device adapted to monitor at least one engineering condition of the pneumatic tire when the pneumatic tire is in use on a vehicle;

the combination comprising;

a pneumatic tire having an inner chamber;

the pneumatic tire having an innerliner defining the inner surface of the pneumatic tire;

the innerliner being at least 0.06 inch thick;

a monitoring device having at least one sensing element adapted to monitor an engineering condition of the pneumatic tire;

an adhesive compatible with the innerliner;

the adhesive being rigid when cured;

the monitoring device being encapsulated with a rigid epoxy to provide an encapsulated monitoring device having an outer surface; and

the rigid cured adhesive disposed between the encapsulated monitoring device and the innerliner to connect the encapsulated monitoring device to the pneumatic tire.

18. The combination of claim 17, wherein the adhesive bonds to the rigid encapsulated monitoring device.

19. The combination of claim 17, wherein the pneumatic tire has low flex areas;

the monitoring device being connected to the tire at one of the low flex areas of the tire.