Patent ID: 8919188

Claim:
An external tire pressure sensing device comprising from bottom to top along its axial direction a base, a sensor for detection of the internal pressure of tire, a circuit board for incorporating a control circuit therein, a button battery and a packaging suite used for package purpose, wherein the base includes a screw hole along its axial direction for locking with a gas nozzle, and a circular platform is formed on a top portion of the base; the device comprises an integral sealable venting member having a supporting platform tightly engaged with the circular platform, a communication portion placed into the base screw hole from the bottom of the supporting platform to push out a gas outlet valve of the gas nozzle, and a communicating hole for communicating the screw hole with an upper space of the supporting platform; the sensor is installed on the bottom surface of the circuit board so as to be electrically connected with a control circuit of the circuit board; and a sensing portion located on a bottom surface of the sensor is engaged tightly with the communicating hole of the sealable venting member; the button battery is positioned on a top surface of the circuit board and electrically connected with the control circuit so as to provide electrical power; the control circuit is used to transmit via an antenna the signal generated by the sensor during detection process; the packaging suite includes an inner suite sleeved on the periphery of the base and an outer suite which cooperates with the inner suite so as to pack the entire device.