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Temperature sensing brake lining wear indicator

  • US 5,909,171 A
  • Filed: 05/01/1998
  • Issued: 06/01/1999
  • Est. Priority Date: 07/17/1997
  • Status: Expired due to Fees
First Claim
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1. A method for indicating the remaining amount of brake lining material in a drum brake assembly comprising the steps of:

  • 1) providing a brake actuator, a cylindrical drum, and at least one brake shoe assembly having a brake lining supported by a backing plate, the lining including a temperature assembly comprised of at least two temperature sensors;

    2) actuating the brake shoe assembly against the drum;

    3) producing a first time signal T1 in response to timing the period for a first temperature sensor to reach a first predetermined temperature;

    4) producing a second time signal T2 in response to timing the period for a second temperature sensor to reach a second predetermined temperature;

    5) determining an amount of remaining brake lining material based on a comparison between the first T1 and second T2 time signals; and

    6) displaying the amount of remaining brake lining.

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