Pneumatic pressure switch for tire pressure monitor

Details Pneumatic pressure switch for tire pressure monitor Pneumatic pressure switch for tire pressure monitor

1986-03-03

1987-10-20

Crosland, Donnie L.

Communications: electrical

Selective

Having indication or alarm

340 60, 340614, 340626, 200 6122, 200 83R, 116 34R, 731465, 73717, B60C 2300

Patent

active

047017422

ABSTRACT:
A pneumatically operated pressure switch for monitoring the air pressure in a tire is provided with a second switch in its housing capsule. The second switch is connected to an oscillating circuit. This second switch changes the oscillating circuit upon sensing a change in the gas pressure in the reference pressure chamber. This leads to an error indication to the driver, and thereby provides a self-monitoring pressure switch for monitoring the air pressure in a tire.

REFERENCES:
patent: 3760350 (1973-09-01), Johnson
patent: 4131876 (1978-12-01), Dees, Sr. et al.
patent: 4348654 (1982-09-01), Matsuda et al.
Research Report TV 7672, Federal Adminstry for Research and Technology, "Tire Characteristics and Driving Safety; Project Area I, Air Pressure Control System", R. Weber et al., Porsche AG, pp. 107-124, Dec. 1980.

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