Signals and indicators – Vehicle – Tire inflation or deflation
Patent
1983-03-24
1986-07-22
Frankfort, Charles
Signals and indicators
Vehicle
Tire inflation or deflation
116 70, 116266, B60C 2304
Patent
active
046012540
ABSTRACT:
A tire pressure warning device is disclosed which produces an explosive report when the tire pressure falls below a predetermined value. The device includes a connector member which screws onto the valve stem of a tire and admits pressurized air from the tire to a pressure sensing valve. A cap member screws onto the connector member and includes an actuating plunger which is biased by a coil spring toward engagement with a valve actuator in the connector member. The cap member has an outlet passage which is closed by an elastomeric balloon. A closure valve which is normally open is adapted to close the outlet passage. When the tire pressure falls below a predetermined value, the pressure sensing valve is opened and pressurized air from the tire is admitted through the closure valve to the balloon and the balloon is inflated until it explodes. The outrush of air following explosion of the balloon causes the closure valve to close and prevent further loss of air from the tire. The pressure sensing valve comprises an actuator and a valve element, with a coupling member for opening the valve element when the pressure decreases from a threshold value to a predetermined value.
REFERENCES:
patent: 3071973 (1963-01-01), Helfand
patent: 3279418 (1966-10-01), Nilsson
patent: 4024829 (1977-05-01), Su
patent: 4155325 (1979-05-01), Yu
patent: 4174673 (1979-11-01), Tung
Huang Chung-Siung
Kuo Hsien-Ching
Corr Denis E.
Frankfort Charles
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