Precision inflation device
First Claim
1. A device for measuring the pressure of a tire, the device comprising:
- (a) a microcontroller configured to calculate a target pressure;
(b) a pressure sensor coupled to the microcontroller for measuring an internal pressure of the tire;
(c) a first temperature sensor coupled to the microcontroller for measuring an internal temperature of the tire;
(d) a user input coupled to the microcontroller for inputting a recommended pressure for the tire;
(e) a second temperature sensor coupled to the microcontroller for measuring an ambient temperature; and
, (f) a display coupled to the microcontroller for indicating;
(i) the internal pressure of the tire; and
, (ii) the target pressure, wherein the microcontroller converts the recommended pressure into the target pressure based on a ratio of the internal temperature in Kelvin to the ambient temperature in Kelvin, such that a user is able to inflate and deflate the tire until the display indicates that the internal pressure is equal to the target pressure.
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Abstract
The invention provides a device for measuring the pressure of a tire. The device comprises a microcontroller configured to calculate a target pressure, a pressure sensor coupled to the microcontroller for measuring an internal pressure of the tire, a first temperature sensor coupled to the microcontroller for measuring an internal temperature of the tire, a user input coupled to the microcontroller for inputting a recommended pressure for the tire, a second temperature sensor coupled to the microcontroller for measuring an ambient temperature, and, a display coupled to the microcontroller for indicating the internal pressure of the tire and the target pressure. The microcontroller converts the recommended pressure into the target pressure based on a ratio of the internal temperature in Kelvin to the ambient temperature in Kelvin, such that a user is able to inflate and deflate the tire until the display indicates that the internal pressure is equal to the target pressure.
44 Citations
8 Claims
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1. A device for measuring the pressure of a tire, the device comprising:
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(a) a microcontroller configured to calculate a target pressure;
(b) a pressure sensor coupled to the microcontroller for measuring an internal pressure of the tire;
(c) a first temperature sensor coupled to the microcontroller for measuring an internal temperature of the tire;
(d) a user input coupled to the microcontroller for inputting a recommended pressure for the tire;
(e) a second temperature sensor coupled to the microcontroller for measuring an ambient temperature; and
,(f) a display coupled to the microcontroller for indicating;
(i) the internal pressure of the tire; and
,(ii) the target pressure, wherein the microcontroller converts the recommended pressure into the target pressure based on a ratio of the internal temperature in Kelvin to the ambient temperature in Kelvin, such that a user is able to inflate and deflate the tire until the display indicates that the internal pressure is equal to the target pressure. - View Dependent Claims (2, 3, 4)
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5. A method of inflating a tire comprising:
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(a) providing a device comprising a pressure sensor, first and second temperature sensors, a user input and a display, all coupled to a microprocessor;
(b) coupling the device to the tire;
(c) measuring an internal pressure P and an internal temperature T of air in the tire with the pressure sensor and the first temperature sensor, and measuring an ambient air temperature Ta with the second temperature sensor;
(d) inputting a recommended pressure Pr with the user input;
(e) calculating a target pressure Pt=Pr+P(1−
Ta/T);
(f) displaying the internal pressure P and the target pressure Pt on the display; and
,(g) adjusting an amount of air in the tire so that the internal pressure P is equal to the target pressure Pt. - View Dependent Claims (6, 7, 8)
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Specification