Circuits for coupling signals carrying information to a tire pressure monitoring system in the absence of a receiver
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United States of America Patent
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May 3, 2005
Grant Date -
Apr 15, 2004
app pub date -
Oct 9, 2002
filing date -
Oct 9, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Circuit and method for coupling signals to a tire pressure monitoring system assembled within the interior of a tire in the absence of a receiver are provided. The circuit comprises a coupling circuit that provides capacitance or electromagnetic coupling to pass an externally-derived stream of pulses to a microprocessor therein by either, in the case of capacitance coupling, connecting an external device that generates the stream of externally-derived of pulses to a valve stem of the tire and an electrical ground. In the case of electromagnetic coupling, by placing a suitable external device proximate the coupling circuit. The stream of pulses carries information usable by the microprocessor to perform a respective operational function.
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