Device for monitoring and wirelessly indicating a pressure...

Details Device for monitoring and wirelessly indicating a pressure... Device for monitoring and wirelessly indicating a pressure...

2004-05-19

2008-12-16

Allen, Andre J. (Department: 2855)

Measuring and testing

Tire, tread or roadway

Reexamination Certificate

active

07464587

ABSTRACT:
A device for monitoring and wirelessly signaling a pressure, or a change in pressure, in pneumatic tires on vehicles having a pressure sensor for measuring the pressure or the change in pressure; a transmitter for transmitting a signal derived from the measuring signal of the pressure sensor; a control circuit that activates the transmitter only from time to time; a battery (1) as current source; and a back-up capacitor connected in parallel to the battery. A controllable switching unit is provided by means of which the back-up capacitor can be connected in parallel to the battery from time to time for a limited period of time only.

REFERENCES:
patent: 4193063 (1980-03-01), Hitt et al.
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patent: 5563479 (1996-10-01), Suzuki
patent: 5708411 (1998-01-01), Hill
patent: 6218937 (2001-04-01), Delaporte
patent: 199 39 936 (1999-08-01), None
patent: 101 30 035 (2002-02-01), None
patent: 0 016 991 (1980-03-01), None
Norman, N.: Reifendruck-Kontrollsystem für alle Fahrzeugklassen.ATZ Automobiltechnische vol. 102, No. 11/2000, pp. 950 to 956.

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