Patent ID: 6799455
Filing Date: 2004-10-05
Classification: B60C

Abstract:
A vehicle tire air pressure monitor comprising a pressure sensitive radio frequency transmitter adapted to be mounted on each tire on a vehicle and in communication with the tire internal air pressure for transmitting a wireless signal identifying the tire and air pressure, and indicators adapted to be mounted in a vehicle, each indicator adapted to be mounted in position for signaling to a vehicle operator the tire and air pressure condition of each tire to enable a vehicle operator to determine whether the air pressure in each tire is in the range of air pressure for safe operation of the vehicle or in the range of air pressure for unsafe operation of the vehicle, said transmitter including an antenna oriented internally of the tire for transmitting a signal indicating the air pressure conditions therein to said indicator, said monitor mounted on each tire including a housing, said housing including an internally threaded lower end threadedly engaged with an outer threaded end of a valve stem from which the valve has been removed, a valve in an outer end of said housing, a passageway in said housing in communication with said valve in the outer end of said housing, said valve stem and the interior of a tire to enable inflation and deflation of a vehicle tire through said passageway from the outer end of said housing while the housing is mounted on a valve stem, said transmitter, a battery and a pressure sensor mounted in said housing in communication with said passageway, and an antenna connected with said transmitter and extending through said passageway into the tire for transmitting a radio frequency signal to an indicator for indicating air pressure condition in the tire.