Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1997-07-17
1999-08-17
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340453, 340588, 340589, 188 111R, 188 111W, 188 111L, 116208, B60Q 100, F16D 6600
Patent
active
059399783
ABSTRACT:
A brake lining wear indicator utilizes a temperature sensor assembly embedded in a brake lining of a drum brake assembly. The temperature sensor assembly includes two temperature sensors with a first temperature sensor located at a first distance X from the wear surface of the brake lining and a second temperature sensor located at a second distance X+d from the wear surface. A timing device measures the time period for the first temperature sensor to reach a first predetermined temperature and measures the time period for the second temperature sensor to reach a second predetermined temperature. The remaining useful thickness of the brake lining is determined based on the ratio of the respective time periods. Thus, the indicator provides a time-temperature based determination of when the brake linings should be replaced. This determination is easily monitored during the operation of the vehicle and can be made without requiring a physical measurement or visual inspection of the thickness of the brake lining on each brake shoe.
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Crosland Donnie L.
Meritor Heavy Vehicle Systems LLC
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