Tire pressure indicator

Details Tire pressure indicator Tire pressure indicator

1996-12-23

1997-12-02

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

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

340447, 340445, 340539, 731465, 731464, B60C 2300

Patent

active

056941110

ABSTRACT:
A pressure gauge of a tire pressure indicator for a set of pneumatic tires of a vehicle includes a casing having a hollow adaptor to be attached to the pneumatic tire, an inlet and a finger piece for opening an inflating valve of the tire, and a signal generating device disposed in the casing. The signal generating device includes a pressure sensing unit which generates an analog voltage signal that varies in accordance with pressure imposed on the inlet, a signal converting unit for converting the analog voltage signal into a digital output signal, and an encoder unit for comparing the digital output signal of the signal converting unit with high pressure and low pressure limits of a predetermined normal operating pressure range, and for generating a coded signal which includes the digital output signal when the digital output signal is not within the operating pressure range.

REFERENCES:
patent: 4970491 (1990-11-01), Saint et al.
patent: 5109213 (1992-04-01), Williams
patent: 5285189 (1994-02-01), Nowicki et al.
patent: 5289161 (1994-02-01), Huang
patent: 5602524 (1997-02-01), Mock et al.

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