Temperature corrected tire pressure gauge and method

• US 20040153281A1
• Filed: 02/05/2003
• Published: 08/05/2004
• Est. Priority Date: 02/05/2003
• Status: Active Grant

• Current Assignee: Harry M. Jaynes
• Original Assignee: Harry M. Jaynes
• Inventors: Jaynes, Harry M.
• Granted Patent: US 6,983,209 B2
• Time in Patent Office: Days
• US Class Current: 702/138
• CPC Class Codes: G01L 17/00 Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
• CPC Class Codes: G01L 19/0092 Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature G01L9/025, G01L9/045, G01L9/065, G01L9/085, G01L9/105, G01L9/125, G01L19/02, G01L19/04 take precedence; measuring two or more variable G01D21/02; temperature sensors with pressure compensation G01K1/26

Abstract

Disclosed is a device (10) and method for determining a temperature-corrected tire pressure. A preselected baseline temperature (26) is measured or selected. A second temperature (28) is measured using a temperature probe (22). An actual tire pressure (30) is measured (24). A programmed processor calculates and displays (14) a corrected tire pressure (32) corresponding to the baseline temperature (26) according the ideal gas law.

Claims

1. A device for determining a temperature-corrected tire pressure, comprising:

an input for preselecting a baseline temperature;

a temperature measuring means for determining a second temperature;

a pressure measuring means for determining an actual tire pressure at the second temperature;

a processor for calculating a corrected tire pressure corresponding to the baseline temperature based on the actual tire pressure at the second temperature and any difference between the baseline temperature and the second temperature;

a means for displaying the calculated corrected pressure.

2. An apparatus according to claim 1, wherein the temperature measuring means includes a tire temperature probe.

3. An apparatus according to claim 1, wherein the baseline temperature is input using a temperature measuring probe.

4. An apparatus according to claim 1, further comprising memory means for recording a series of temperature and pressure measurements and calculations.

5. An apparatus according to claim 1, wherein the displaying means also displays at least one of the baseline temperature, the second temperature, and the actual tire pressure.

6. An apparatus according to claim 5, further comprising memory means for recording a series of temperature and pressure measurements and calculations.

7. A method for determining a temperature-corrected tire pressure, comprising:

selecting a baseline temperature;

providing a tire temperature measuring means;

measuring actual current tire temperature as an estimation of internal air temperature;

providing a tire pressure measuring means;

measuring tire pressure at current temperature;

comparing the first and second tire temperatures to determine any difference;

calculating an adjusted tire pressure corresponding to the baseline temperature according to any determined temperature difference; and

displaying the adjusted tire pressure.

8. The method according to claim 7, wherein the tire temperature measuring means includes a tire temperature probe.

9. The method according to claim 8, wherein the baseline temperature is selected by input from the tire temperature probe.

10. The method according to claim 7, wherein the tire temperature measuring means and tire pressure measuring means are an integral unit.

11. The method according to claim 10, wherein the tire temperature measuring means includes a tire temperature probe.

12. The method according to claim 7, further comprising providing a memory means for recording a series of temperature and pressure measurements and calculations.

13. The method according to claim 7, further comprising displaying at least one of the baseline temperature, the second temperature, and the actual tire pressure.

14. The method according to claim 13, further comprising providing a memory means for recording a series of temperature and pressure measurements and calculations.