Inflation pressure sensor for automobile pneumatic tire

Details Inflation pressure sensor for automobile pneumatic tire Inflation pressure sensor for automobile pneumatic tire

1994-12-09

1996-06-18

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Inflating devices

731465, 731468, 340442, 340445, B60C 2304

Patent

active

055268617

ABSTRACT:
A tire inflation pressure sensor mounted on the outside of the wheel. The sensor housing includes a diaphragm, a cylinder, a magnet holder, a spring, a magnet holding member connected with a magnet, a guide member and a stopper. When the inflation pressure of a tire is normal, the magnet holding member stops at a position where the magnet indicates a north pole. When the inflation pressure goes down below a specified value, the magnet holding member travels a predetermined distance and at the same time the magnet holding member rotates at a predetermined angle indicating a south pole. This changeover of magnetic polarity is detected by an external magnetic induction element to operate a warning device.

REFERENCES:
patent: 3715719 (1973-02-01), Sugiyama
patent: 3872268 (1975-03-01), Hata
patent: 4157530 (1979-06-01), Merz
patent: 4208649 (1980-06-01), Sarides
patent: 4348896 (1982-09-01), Sarides
patent: 4807468 (1989-02-01), Galan

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