Tire pressure alarm system

Details Tire pressure alarm system Tire pressure alarm system

1974-07-11

1976-10-19

Caldwell, John W.

Communications: electrical

Selective

Having indication or alarm

200 6125, 731465, B60C 2304

Patent

active

039874079

ABSTRACT:
A tire pressure alarm system which is mounted directly onto an existing lug bolt of a vehicle wheel after the bolt has been drilled axially to slidably accommodate a sensing rod. The sensing rod is restrained by a pressure responsive member, preferably in the form of a toroidal tube in direct fluid communication with the interior of a tire carried on the wheel. If tire pressure is lost, a spring overcomes the pressure responsive member to move the sensing rod to a position wherein it activates a signal circuit.

REFERENCES:
patent: 1882661 (1932-10-01), Guthrie
patent: 2063871 (1936-12-01), French
patent: 2334443 (1943-11-01), Schubert
patent: 2736004 (1956-02-01), Greene
patent: 2790155 (1957-04-01), DeLucia et al.
patent: 2958746 (1960-11-01), Hawkins
patent: 3715719 (1973-02-01), Sugiyama
patent: 3760350 (1973-09-01), Johnson

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