Alarm device for internal pressure of tire

Details Alarm device for internal pressure of tire Alarm device for internal pressure of tire

2006-04-25

2006-04-25

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

C340S442000, C340S447000, C340S441000, C073S146500

Reexamination Certificate

active

07034671

ABSTRACT:
The sensor unit is operated based on a first timing signal with a first interval. If there is no second timing signal with a second interval longer than the first interval, a tire internal-pressure information signal is transmitted when the alarm device judges a moving of a vehicle based on a signal from the tire rotational-movement detecting means, the signal having the tire internal-pressure data with a start bit, and the transmission of the tire internal-pressure information signal is stopped when the device judges a non-moving of said vehicle. If there is the second timing signal, the tire internal-pressure information signal is transmitted when the device judges the moving of the vehicle and N pieces of tire internal-pressure information signals are transmitted at third intervals (N is a natural number not less than 2) when the device judges a non-moving of the vehicle, each tire internal-pressure information signal having the tire internal-pressure data with said start bit. When a main switch of the vehicle is on, the receiving-side module is always in an operating state. When the main switch is off, the receiving-side module is intermittently operated at fourth intervals, each forth interval is shorter than (N−1) times of the third interval, such that a second duration for operation of the receiving-side module is longer than the third interval.

REFERENCES:
patent: 6271748 (2001-08-01), Derbyshire et al.
patent: 6292096 (2001-09-01), Munch et al.
patent: 6518875 (2003-02-01), DeZorzi
patent: 6828905 (2004-12-01), Normann et al.
patent: 6829926 (2004-12-01), Cantu et al.
patent: 6945103 (2005-09-01), Lee et al.

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