Tire pressure monitoring system
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United States of America Patent
Stats
-
Mar 28, 1989
Grant Date -
N/A
app pub date -
Apr 18, 1985
filing date -
Apr 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tire pressure monitoring system for a tractor-trailer type vehicle includes a series of sensors on each of the wheels of the vehicle. When a low pressure condition occurs, the sensor activates a radio frequency transmitter for delivering a low power FM signal to a receiver on the tractor. A delay circuit is incorporated in the receiver to require that the signal from the transmitter last for a predetermined duration prior to energizing an indicator in the tractor. The receiver antenna is preferably mounted on the bottom of the tractor in a plane including the trailer wheels.
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