Measuring and testing – Tire – tread or roadway
Reexamination Certificate
2006-02-28
2006-02-28
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Tire, tread or roadway
C340S442000, C340S445000
Reexamination Certificate
active
07004019
ABSTRACT:
A system for the detection of a pressure drop in a tire comprising a tire air pressure sensor, a tire temperature sensor and an evaluating unit. The evaluating unit converts the measured air pressure values and temperature values into temperature compensated air pressure values and produces an alarm signal when the temporal fluctuation exceeds an air pressure fluctuation threshold value. The evaluating unit decreases the air pressure threshold value with increasing deviation from the measured temperature compensated air pressure value of a predetermined temperature compensated air pressure reference value. At least one further sensor may be provided for measuring a parameter which influences the air pressure in the tire whereby the evaluating unit corrects the measured and, regarding to the production of an alarm signal, evaluated air pressure according to this parameter.
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Derwent Abstract PAT 1994-250094, Feb. 22, 1996.
Fischer Martin
Fuessel Dominik
Hillenmayer Franz
Allen Andre
Eisenberg Jacob
Lefkowitz Edward
Siemens AG
Siemens AG
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