Low tire pressure warning devices

Details Low tire pressure warning devices Low tire pressure warning devices

1985-03-12

1987-02-17

Rowland, James L.

Communications: electrical

Selective

Having indication or alarm

200 6125, 116 34R, 731465, 731468, B60C 2300

Patent

active

046443177

ABSTRACT:
A low tire pressure warning device comprises a body defining a passage which is connected by air pipes to the valves of two adjacent tires on the axle of a truck. The air pressure in the passage is normally the common pressure of the two tires. If one of the tires develops a leak, the common air pressure drops until a spring-actuated piston moves to seal the passage and closes a set of contacts. A miniature radio transmitter in the body of the device is activated, sending a warning signal to a receiver in the cab of the truck, and further air leakage from the good tire is halted.

REFERENCES:
patent: 3999431 (1976-12-01), Makarainen
patent: 4119944 (1978-10-01), Smith
patent: 4468650 (1984-08-01), Barbee

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