Tire pressure drop detecting apparatus

Details Tire pressure drop detecting apparatus Tire pressure drop detecting apparatus

1980-06-09

1982-07-06

Ruehl, Charles A.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

200 6125, 340 58, B60C 2304

Patent

active

043376525

ABSTRACT:
An apparatus for detecting a pressure drop in a tire chamber of a tire-and-wheel assembly for an automotive vehicle, comprising an oscillator assembly held stationary with respect to the vehicle body structure and a resonator assembly mounted on the wheel rim of the tire-and-wheel assembly, wherein the resonator assembly comprises a resonant inductor and a resonant capacitor which are electrically connected together across a pressure-sensitive switch unit directly communicating with the tire chamber and which are positioned together with a portion of the switch unit within a protective receptacle secured to the wheel rim and wherein the resonant inductor and capacitor and the portion of the switch unit are encapsulated in a body of potting compound forming a potted resonance circuit structure within the protective receptacle, the switch unit and the resonant capacitor being positioned intermally of the resonant inductor.

REFERENCES:
patent: 3614732 (1971-10-01), Lejeune
patent: 4180795 (1979-12-01), Matsuda et al.
patent: 4254398 (1981-03-01), Matsuda et al.

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