Patent ID: 7140244

Claim:
An apparatus for measuring inflation pressure of a resilient-walled vessel of a vehicle tire associated with an inflation valve and with a rim; said apparatus comprising an external, portable member and a pressure sensing member, which is separate from the portable member and is located within the tire so as to be exposed to the inflation pressure; said portable member is capable to generate and transmit energy to the pressure sensing member and in response to receive and to process a pressure signal, which depends on the inflation pressure and upon processing of the pressure signal to derive therefrom an inflation pressure value; said pressure sensing member is capable upon receiving energy from the portable member to generate the pressure signal and to transmit it to the portable member; the portable member comprises a probe capable to create electrical contact between the portable member and the pressure sensing member upon establishing of a physical contact between the probe and the valve; and said pressure sensing member is capable to create electrical contact with the rim and with the valve.