Tire pressure monitoring device
First Claim
1. A tire pressure monitoring device for monitoring tire pressure, said monitoring device comprising:
- a housing coupled to a tire valve;
said housing having a first pressure chamber, a second pressure chamber, and a flexible membrane, wherein said first and second pressure chambers are separated by a flexible membrane; and
a signaling means located within said housing, wherein said signaling means emits a warning signal when a pressure within the first pressure chamber is greater than a pressure within the second pressure chamber.
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Abstract
A low tire pressure monitoring device that is affixed to a tire valve stem and methods of using the same. The monitoring device comprises a housing having a counter-pressure chamber, a main pressure chamber, and a flexible membrane that separates the two chambers. The monitoring device is calibrated by trapping the tire'"'"'s initial air pressure in the counter-pressure chamber. The air pressure within the main pressure chamber is equivalent to the air pressure within the tire. Over the course of time, the air pressure within the tire and concomitantly the air pressure within the main pressure chamber decreases. When the pressure in the counter-pressure is greater than the pressure within the main pressure chamber, the flexible membrane touches and completes an electrical circuit and a warning signal is emitted.
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Citations
25 Claims
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1. A tire pressure monitoring device for monitoring tire pressure, said monitoring device comprising:
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a housing coupled to a tire valve;
said housing having a first pressure chamber, a second pressure chamber, and a flexible membrane, wherein said first and second pressure chambers are separated by a flexible membrane; and
a signaling means located within said housing, wherein said signaling means emits a warning signal when a pressure within the first pressure chamber is greater than a pressure within the second pressure chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. A tire pressure monitoring device for monitoring tire pressure, said tire pressure monitoring device comprising:
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a lens, a main housing body, and a lower housing body, wherein said lens is coupled a first end of said main housing, and said lower housing is coupled to said lower housing body;
said lens at least partially defining a counter-pressure chamber;
said main housing body defining a main pressure chamber having a power supply, a signaling means, and a flexible membrane;
said flexible membrane separating said counter-pressure chamber and said main pressure chamber; and
said lower housing body adapted to engage a tire valve. - View Dependent Claims (11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 25)
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17. A tire pressure monitoring device for monitoring tire pressure, said tire pressure monitoring device comprising:
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a housing, wherein said housing is adapted to engage a tire valve; and
said housing including a means for sensing a pressure differential and a means for signaling said pressure differential.
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24. A valve cap having an interior air pressure supplied through a conventional tire valve, said valve cap comprising:
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a transparent top;
a light emitting diode (LED) attached to a printed circuit board;
an upper housing which accommodates the LED and the printed circuit board;
a flexible membrane;
a counter-pressure chamber, wherein the counter-pressure chamber is a space between the transparent top and the membrane;
at least one battery located within the upper housing; and
a lower housing which is internally threaded and adapted to mate with a tire valve assembly.
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Specification