Tire pressure detecting/warning apparatus

Details Tire pressure detecting/warning apparatus Tire pressure detecting/warning apparatus

1999-06-14

2000-08-08

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340442, 340447, 340 58, 731465, B60C 2300

Patent

active

061007986

ABSTRACT:
A tire pressure detecting/warning apparatus includes a main body mounted to a tire valve for introducing air pressure in the tire. The main body includes a first air passage and a second air passage. A first reed is mounted on the first air passage and is deformed to be in electrical contact with a first contact when the tire pressure is higher than a pre-determined relatively higher value of a safety range. A second reed is mounted on the second air passage and is deformed to be disengaged from a second contact when the tire pressure is lower than a pre-determined relatively lower value of the safety range. The tire pressure is too high if the first reed is in contact with the first contact, and the tire pressure is too low if the second reed is disengaged from the second contact. In either case, a radio- transmitting device sends a signal to a receiver in the vehicle, and a siren is activated to give a warning by sound or lamp that the pressure is too high or too low.

REFERENCES:
patent: 4090172 (1978-05-01), Vesnic
patent: 4286253 (1981-08-01), Nagy
patent: 4520344 (1985-05-01), Shu et al.
patent: 4954806 (1990-09-01), Hwang
patent: 4975679 (1990-12-01), Ballyns
patent: 5856619 (1999-01-01), Wang

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