Patent ID: 6518877
Filing Date: 2003-02-11
Classification: B60C,H01Q

Abstract:
A system for monitoring pneumatic tire conditions for one or more tire/wheel assemblies mounted on a vehicle;each tire/wheel assembly comprising a tire mounted on a wheel or wheel carrier; and the system comprising: a transponder with a transmitting antenna mounted on the wheel or wheel carrier of the one or more tire/wheel assemblies for transmitting a signal indicating the condition of the tire of the one or more tire/wheel assemblies, one or more receivers each having one or more receiving antennas fixedly mounted on the vehicle, and circuitry for processing the signals received by the one or more receiving antennas to determine the condition of the tire of the one or more tire/wheel assemblies; the system characterized in that: circuitry for each transponder is disposed on a printed circuit board within a protective housing coaxial to the hub of the wheel or wheel carrier; and each transmitting antenna is selected from the group consisting of a partial loop antenna, a helical antenna, a circular dipole antenna, and a small coupling coil adjacent to an endless hoop antenna.