Patent ID: 7469581

Claim:
A tire valve unit secured to a securing hole provided in a rim of a wheel of a vehicle, the tire valve unit comprising: a tire valve including a hard cylindrical member and an elastic cylindrical member encompassing the hard cylindrical member, the elastic cylindrical member having an annular securing groove in an outer circumferential surface of the elastic cylindrical member, a portion of the rim around the securing groove being fitted in the securing groove when the elastic cylindrical member is passed though the securing hole, the elastic cylindrical member having an inner end located in the interior of a tire attached to the rim; and a tire sensor fixed to the hard cylindrical member, the tire sensor being arranged in the interior of the tire and capable of detecting the condition of the tire when the tire valve unit is secured to the rim, wherein the elastic cylindrical member defines an annular space around the hard cylindrical member, the annular space extending from a position corresponding to the securing groove in an axial direction of the hard cylindrical member, the annular space being opened toward the interior of the tire to communicate with the interior of the tire so that the inner end of the elastic cylindrical member is a free end that is separated from the tire sensor.