Patent ID: 7764168

Claim:
A tire pressure monitoring system, which is connected to a capped tire valve of a tire, comprising: a baseplate having a connecting end with an air hole at a center of a bottom thereof to connect the capped tire valve and an antenna container surrounding the connecting end, and further having a bored groove on a top thereof; a cap detachably connected to the top of the baseplate to form an overhead container therein, so that the overhead container and the antenna container are separated by the baseplate, and the bored groove communicates the overhead container and the antenna container; an antenna received in the antenna container of the baseplate; a signal transmitter, which is received in the overhead container, having a signal conducting wire connected to the antenna through the bored groove; and a power supply received in the overhead container and above the signal transmitter to provide the signal transmitter power, wherein the power supply includes a battery with a bottom end conducted with the signal transmitter and a cover body with a spring conducted with a top end of the battery.