Tire pressure indicator integral with tire stem

Details Tire pressure indicator integral with tire stem Tire pressure indicator integral with tire stem

1980-06-27

1982-01-12

Weakley, Harold W.

Fluid handling

Inflatable article

With gauge or indicator

731468, F16K 1520

Patent

active

043100147

ABSTRACT:
To provide a visual indication of low tire pressure, a valve stem comprises a base for mounting to a tire rim, an outer nipple portion containing a tire stem valve, and an intermediate convoluted portion connecting the base and the nipple. An inner extension of the nipple passes through the base portion and has its inner end secured to a spring which is compressed between the extension and the base portion to urge the nipple toward the tire rim against the force of the tire pressure so that the spacing of the nipple from the rim is a measure of tire pressure. A transparent cylinder surrounding the valve stem and secured to the base portion contains a window for viewing an indicia mark on the nipple, the indicia being placed to provide an indication of low tire pressure when it is visible through the window.

REFERENCES:
patent: 3230968 (1966-01-01), Struby
patent: 3650150 (1972-03-01), Eccles
patent: 3811459 (1974-05-01), Schmidt
patent: 3906988 (1975-09-01), Mottram
patent: 3990467 (1976-11-01), Sargent

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