Tire pressure indicator

Details Tire pressure indicator Tire pressure indicator

2005-09-13

2005-09-13

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Land vehicle alarms or indicators

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

C340S426330, C073S146200

Reexamination Certificate

active

06943674

ABSTRACT:
A tire pressure indicator includes a hollow annular pressure cell fixed fastened to the inner side of the rim for synchronous rotation, the hollow annular pressure cell having a diaphragm that displaces subject to the condition of the tire pressure of the tire, a contactless displacement sensor adapted to detect axial displacement of the diaphragm and to produce a corresponding modulated signal, a signal processor adapted to process the modulated signal from the displacement sensor into a tire pressure signal, a pressure display adapted to display the value of the tire pressure signal output from the signal processor, and a link tube connected between the hollow annular pressure cell and the tire to keep the internal air pressure of the hollow annular pressure cell in balance with the internal air pressure of the tire.

REFERENCES:
patent: 3710314 (1973-01-01), Bell et al.
patent: 3757294 (1973-09-01), Schultz
patent: 4437504 (1984-03-01), Stumpe
patent: 4619137 (1986-10-01), Bott
patent: 5798689 (1998-08-01), Huang

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