| 摘要 |
A tire pressure monitor continuously indicating to a vehicle operator whether or not each tire on the vehicle, including a spare if present, is adequately inflated for safe "over-the-road" operation. The monitor includes an indicator associated with each tire to indicate when the air pressure in any individual tire on the vehicle is not inflated to a pressure adequate for safe operation. The monitor also includes a battery operated pressure sensitive radio frequency transmitter mounted on the outer end of a conventional tire valve stem and includes an antenna extending into each tire for transmitting a signal to an indicator assigned to each tire without interference from metal wheel components. The indicators are mounted on the instrument panel or dashboard of the vehicle. The signal transmitted from the transmitter on each tire valve actuates only the indicator associated with and receiving a signal from only the transmitter assigned to each tire.
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