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Transmitter for tire condition monitoring apparatus

  • US 7,212,105 B2
  • Filed: 03/17/2004
  • Issued: 05/01/2007
  • Est. Priority Date: 10/14/2003
  • Status: Expired due to Fees
First Claim
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1. A transmitter of a tire condition monitoring apparatus, wherein the transmitter is attached to a vehicle wheel to be located inside a tire, the transmitter comprising:

  • a detection device for detecting that the transmitter is attached to the wheel;

    a transmission circuit, wherein the transmission circuit generates a transmission signal containing data representing a condition of the tire and outputs the transmission signal;

    an antenna for wirelessly transmitting the transmission signal; and

    a controller that changes a transmission power of the transmission power of the transmission circuit according to a detection result of the detection device;

    wherein the detection device is a mechanical switch that is pressed by the wheel when the transmitter is attached to the wheel so that the switch is switched to different states when the transmitter is attached to the wheel and when the transmitter is detached from the wheel.

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