Device to encapsulate a substrate containing sensitive electronic components and a pressure sensor pack

• US 6,161,430 A
• Filed: 10/16/1998
• Issued: 12/19/2000
• Est. Priority Date: 10/16/1998
• 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: Tomaszewski, Walter, Koch, Russell W., Weitzenhof, David A.
• Primary Examiner(s): OEN, WILLIAM L
• Application Number:
  US09/174,438
• Time in Patent Office: 795 Days
• Field of Search: 73/146, 73/146.5, 73/8, 73/9, 152/152.1, 152/64, 152/123, 152/367, 152/539
• US Class Current: 73/146
• 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 device for encapsulating a monitoring device for a pneumatic tire with an encapsulation material includes an encapsulation body having an encapsulation chamber. The monitoring device has at least a pressure sensor and an antenna. A damming element is carried by the encapsulation body in an adjustable manner such that the damming element contacts the pressure sensor of the monitoring device when the monitoring device is disposed within the encapsulation chamber. The damming element prevents the pressure sensor from being clogged with the encapsulating material when the monitoring device is encapsulated. The antenna of the monitoring device is held in a channel formed in the body when the monitoring device is disposed within the encapsulation chamber. The connection between the antenna and the body holds the monitoring device in a floating disposition in the encapsulation chamber. The damming element is in the form of a tube that also helps carry the monitoring device in the floating disposition. A breathing tube abuts the pressure sensor and extends through at least a portion of the damming element to further prevent the encapsulation material from clogging the pressure sensor. A top plate of the body extends over the encapsulation chamber to form a lip that serves to indicate when the encapsulation chamber has been filled with the encapsulation material.

Claims

1. In combination, a monitoring device to be encapsulated and a device for encapsulating the monitoring device with an encapsulation material, said monitoring device including a pressure sensor and an antenna carried on a substrate, said encapsulating device including an encapsulation body having an encapsulation chamber and a damming element carried by said encapsulation body, said monitoring device disposed in said encapsulation chamber, said damming element engaging said pressure sensor to prevent the encapsulation material from clogging the pressure sensor.

2. The combination of claim 1, wherein said encapsulation body includes a channel extending through said encapsulation body into said encapsulation chamber, said antenna of said monitoring device disposed in said channel to at least partially hold said monitoring device in a floating disposition within said encapsulation chamber.

3. The combination of claim 1, wherein said damming element includes a longitudinal passageway, an inner O-ring disposed adjacent said longitudinal passageway, said inner O-ring contacting said damming element and said pressure sensor, said inner O-ring at least partially sealing said pressure sensor from said encapsulation chamber.

4. The combination of claim 3, further including a breathing tube disposed in said longitudinal passageway, said breathing tube engaging said pressure sensor, said inner O-ring disposed about said breathing tube.

5. The combination of claim 4, further including an outer O-ring disposed between said damming element and said encapsulation body.

6. The combination of claim 1, further comprising a lip on said encapsulation body that extends over said encapsulation chamber to provide an indicator that allows the user of the device for encapsulating a visual indicator of when the encapsulation chamber is filled with the encapsulating material.

7. In combination, a device for encapsulating a monitoring device for a pneumatic tire with an encapsulation material and a monitoring device having at least a pressure sensor;

the device for encapsulating the monitoring device including an encapsulation body having an encapsulation chamber; and

a damming element carried by said encapsulation body, said damming element being adapted to engage at least a portion of the pressure sensor to prevent the encapsulation material from clogging the pressure sensor.

8. The combination of claim 7, wherein the encapsulation body includes a first body half and a second body half, said body halves cooperating to define said encapsulation chamber when said body halves are connected to each other.

9. The combination of claim 8, wherein one of said body halves includes a textured surface that defines at least a part of said encapsulation chamber when said body halves are connected.

10. The combination of claim 8, wherein said encapsulation body further includes a top plate and a bottom plate, said plates being connected to said body halves to further define said encapsulation chamber.

11. The combination of claim 10, wherein said top plate has an opening defining an edge, said edge of said opening forming a lip over at least a portion of said encapsulation chamber when said top plate is connected to said body halves.

12. The combination of claim 8, wherein at least one of said body halves includes a channel that receives at least a portion of the monitoring device to at least partially hold the monitoring device in a floating disposition within the encapsulation chamber.

13. The combination of claim 12, wherein both of the body halves include a partial channel portion, said partial channel portions cooperating to form said channel when said body halves are connected to form said encapsulation chamber.

14. The combination of claim 7, wherein said damming element is adjustably carried by said encapsulation body such that the position of said damming element with respect to said encapsulation body may be adjusted.

15. The combination of claim 14, wherein said damming element is threadedly carried by said encapsulation body such that rotation of said damming element adjusts the position of said damming element with respect to said encapsulation body.

16. The combination of claim 7, further comprising an outer O-ring disposed between said damming element and said encapsulation body.

17. The combination of claim 16, further comprising an inner O-ring seat formed in said damming element, an inner O-ring disposed in said seat, said inner O-ring engaging the pressure sensor on the monitoring device when the monitoring device is disposed in said encapsulation chamber.

18. The combination of claim 7, wherein said damming element is a tube having a longitudinal passage way.

19. The combination of claim 18, further comprising a breathing tube disposed in said longitudinal passage way, said breathing tube engaging the pressure sensor when the monitoring device is disposed in said encapsulation chamber.

20. The combination of claim 19, further comprising an inner O-ring disposed between said breathing tube and said damming element, said inner O-ring engaging the pressure sensor when the monitoring device is in the encapsulation chamber.

21. The combination of claim 20, wherein the damming element includes an inner O-ring seat and an outer wall, said inner O-ring seat being disposed adjacent said longitudinal passage way and radially inward of said outer wall.

22. The combination of claim 21, wherein said encapsulation body has an outer O-ring seat, an outer O-ring disposed in said outer O-ring seat, said outer O-ring contacting said outer wall of said damming element to at least partially said encapsulation chamber.