Tire pressure sensing component for detecting air pressure and related method

• US 20050092076A1
• Filed: 11/04/2003
• Published: 05/05/2005
• Est. Priority Date: 11/04/2003
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Nantz, John S., Uleski, Michael A.
• Granted Patent: US 7,028,541 B2
• Time in Patent Office: Days
• US Class Current: 73/146.8
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0494 Valve stem attachments positioned inside the tyre chamber

Abstract

In at least one embodiment, the present invention relates to a tire pressure monitor system located within the interior of a tire. The system comprises a housing having a wall forming a cavity and an interior wall forming an opening in fluid communication with the cavity, a tire pressure sensor located within the housing cavity, and a pressure cap inserted into the housing opening. The tire pressure sensor has an orifice for helping to sense tire pressure. The pressure cap comprises a wall having a portion that contacts the sensor and extends around the sensor orifice.

Claims

1. A tire pressure monitor system located within the interior of a tire, the system comprising:

a housing having a wall forming a cavity, the housing further having an interior wall forming a chamber in fluid communication with the cavity;

a tire pressure sensor located within the housing cavity, the sensor having an orifice for helping to sense tire pressure; and

a pressure cap inserted into the housing chamber, the pressure cap comprising a wall having a portion that contacts the sensor and extends around the sensor orifice.

2. The system of claim 1 wherein the pressure cap encircles the sensor orifice.

3. The system of claim 2 wherein the pressure cap substantially blocks fluid communication between the sensor orifice and the housing cavity, the pressure cap having at least a first conduit providing fluid communication between the sensor orifice and the exterior of the housing.

4. The system of claim 1 wherein the pressure cap is made of a heat-resistant compressible material.

5. The system of claim 1 wherein at least a first portion of the pressure cap is not in interference fit with the housing chamber and a second portion of the pressure cap is in interference fit with the housing chamber.

6. The system of claim 1 wherein the pressure cap is substantially frusto-conical in shape.

7. The pressure cap of claim 6 wherein the pressure cap comprises a first frustro-conical section and a second frustro-conical section that is connected with and radially outward from the first section.

8. The pressure cap of claim 3 wherein the interior wall has a first wall portion adjacent a first cap portion of the pressure cap, the first wall portion of the interior wall having a first diameter, and the first cap portion of the pressure cap having a second diameter smaller than the first diameter so that a second conduit is formed between the first wall portion and the first cap portion, the second conduit being in fluid communication with the first conduit.

9. A pressure cap for use with a tire pressure monitor, the monitor comprising a housing having a wall forming a cavity and an interior wall forming a chamber in fluid communication with the cavity and an air pressure sensor within the housing, the cap comprising:

a cap wall which when inserted within the chamber extends between the housing wall and the sensor and extends around the sensor orifice.

10. The pressure cap of claim 9 wherein the pressure cap encircles the sensor orifice.

11. The pressure cap of claim 9 wherein the pressure cap substantially blocks fluid communication between the sensor orifice and the housing cavity, the pressure cap having at least a first conduit providing fluid communication between the sensor orifice and the exterior of the housing.

12. The pressure cap of claim 9 wherein at least a portion of the pressure cap is in interference fit with the housing opening.

13. The pressure cap of claim 9 wherein the pressure cap comprises a first frustro-conical section and a second frustro-conical section that is connected with and radially outward from the first section.

14. The pressure cap of claim 9 wherein the interior wall has a first wall portion adjacent a first cap portion of the pressure cap, the first wall portion of the interior wall having a first diameter, and the first cap portion of the pressure cap having a second diameter smaller than the first diameter so that a second conduit is formed between the first wall portion and the first cap portion, the second conduit being in fluid communication with the first conduit.

15. A method for manufacturing a tire pressure monitoring system located within the interior of a tire, the method comprising:

providing a housing having a wall forming a cavity and having an interior wall forming a chamber in fluid communication with the cavity;

locating a tire pressure sensor within the housing cavity, the sensor having an orifice for helping to sense tire pressure; and

locating a pressure cap into the housing chamber, the pressure cap comprising a wall having a portion that contacts the sensor and extends around the sensor orifice.

16. The method of claim 15 wherein the pressure cap encircles the sensor orifice.

17. The method of claim 15 wherein the pressure cap substantially blocks fluid communication between the sensor orifice and the housing cavity, the pressure cap having at least a first conduit providing fluid communication between the sensor orifice and the exterior of the housing.

18. The method of claim 15 wherein at least a portion of the pressure cap is in interference fit with the housing opening.

19. The method of claim 15 wherein the pressure cap comprises a first frustro-conical section and a second frustro-conical section that is connected with and radially outward from the first section.

20. The method of claim 15 wherein the interior wall has a first wall portion adjacent a first cap portion of the pressure cap, the first wall portion of the interior wall having a first diameter, and the first cap portion of the pressure cap having a second diameter smaller than the first diameter so that a second conduit is formed between the first wall portion and the first cap portion, the second conduit being in fluid communication with the first conduit.