Tire pressure monitoring device

Measuring and testing – Tire – tread or roadway – Tire inflation testing installation

Patent

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Details

B60C 2302

Patent

active

055030122

ABSTRACT:
A tire pressure monitoring device includes a ball disposed within a tube which has an opening, at one end, in communication with the interior of the tire. The tube has a transparent window along its length to allow the position of the ball, within the tube, to be visualized. The transparent window has graduations, calibrated to allow the tire pressure to be determined by the position of the ball within the tube. A magnifying glass can be provided over the transparent window to allow the graduations to be more easily seen. The device can be made integral with a tire valve stem or as an accessory item which can be connected to a conventional tire valve stem. The device continuously displays the tire pressure without causing air to be vented from the tire.

REFERENCES:
patent: D156807 (1950-01-01), Battersby
patent: 1495553 (1924-05-01), Durham
patent: 3720224 (1973-03-01), Foxhall
patent: 3907461 (1975-09-01), Bouder
patent: 4310014 (1982-01-01), Parker
patent: 4411302 (1983-10-01), Kuypers
patent: 4966035 (1990-10-01), Huang
patent: 5025244 (1991-06-01), Huang
patent: 5284061 (1994-02-01), Seeley et al.
patent: 5307846 (1994-05-01), Heinemann

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