Method and apparatus for transmitting stored data and engineering conditions of a tire to a remote location

A method of transmitting stored data and an engineering condition of a pneumatic tire to a remote location wherein the tire is mounted on a rim forming an internal pressure cavity, said method comprising the steps of:

• providing the tire with a device which provides for storage of data pertaining to the tire and which senses an engineering condition of the tire and which includes a first antenna;
• securing the device permanently to the tire within said internal pressure cavity;
• providing a transponder which includes an amplifier, a second antenna, a first power source and a control circuit for sensing the tire data stored in the device and the engineering conditions sensed by said device;
• securing the transponder within the pressure cavity on the rim and remote from the device, said first power source being removably mounted with respect to the rim;
• locating a portion of the second antenna externally of the pressure cavity;
• transmitting the stored data and sensed engineering condition from the device the transponder by using radio frequency (RF) and the first antenna;
• and
• retransmitting the stored data and sensed engineering condition from the transponder to a remote location by using radio frequency (RF), the first power source and the second antenna independent of an operating condition of the tire and independent of external stimulus.