Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-07-25
1990-04-17
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340445, 340448, 116 34R, 731465, 731468, 200 6122, B60C 2300
Patent
active
049184237
ABSTRACT:
A device for inspecting the pressure, temperature, etc. in a tire includes a pressure sensor attached to a valve mounted on the tire rim and having an output that varies depending upon the tire internal pressure, and a resonator including a resonant coil and capacitor which resonates in the presence of an external radiation electromagnetic wave. An oscillation coil of an oscillator which generates the external radiation electromagnetic wave projects from the main body of the inspection device. The main body encloses a signal processor which detects and processes any change in oscillation state which has taken place at the oscillator, as caused by the resonance state of the resonator, and a display to display the result of the signal processing by the signal processor.
REFERENCES:
patent: 4074227 (1978-02-01), Kalmus
patent: 4308520 (1981-12-01), Darlington
patent: 4704901 (1987-11-01), Rocco et al.
Fukuyama Hiroshi
Goshima Norio
Morinaga Makoto
Nakao Makoto
Oono Kiyoshi
Bridgestone Corporation
Crosland Donnie L.
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