Tire pressure indicator and method for detecting reduction of pr

Details Tire pressure indicator and method for detecting reduction of pr Tire pressure indicator and method for detecting reduction of pr

1981-07-27

1984-01-10

Trafton, David L.

Communications: electrical

Selective

Having indication or alarm

731465, 731468, 200 6125, 340515, B60C 2300

Patent

active

044255586

ABSTRACT:
A method and apparatus for detecting reduction in the pressure of a pnenumatic vehicle tire, particularly for multi-wheeled vehicles comprises a sealed housing fitted over the pneumatic tire valve adapted to depress the valve stem of a conventional pneumatic tire valve to release air into the sealed housing and provide a pressurized chamber. The pressure in the housing operates a pressure sensitive member such that when the pressure is reduced, the pressure sensitive member operates contact points to activate a transmitter or other warning device provided in the housing. In one preferred embodiment a sonar transmitter activated by the pressure sensitive member operates a sonar receiver in the vehicle to provide a visual and/or audible warning signal to the operator of the vehicle as to the loss of pressure in any particular vehicle tire.

REFERENCES:
patent: 3713092 (1973-01-01), Ivenbaum
patent: 3757294 (1973-09-01), Schultz
patent: 4059823 (1977-11-01), Martin et al.

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