Abstract: A low tire pressure warning device is described which comprises: (a) a housing having an elongated chamber therein which has a non-detachably mounted closure thereon, a first end of which is capable of communication with the interior of a tire and a second and opposite end thereof capable of communication with the exterior of said tire; (b) a spring-loaded piston mounted within said chamber, functionally connected so as to be axially movable within said chamber in response to changes in tire pressure, and so as to motivate a streamer upon movement of said piston in response to a predetermined tire pressure decrease; and, (c) a spring-mounted, colored warning streamer located within said second end of said chamber and capable of being mounted in a compacted fashion therein, said streamer being connectively related to said spring-loaded piston and capable of being spring motivated to stream out of said chamber, as a warning signal, in response to axial piston movement in response to a predetermined tire pressur

Abstract: The present invention is directed to a low tire pressure warning device which includes a housing, a bladder and/or spring loaded piston within the housing and a colored warning streamer. The housing has an elongated chamber, one end of which communicates with the interior of the tire and the other with the exterior of the tire. In one embodiment, a bladder is mounted within the chamber of the housing so as to expand and contract in response to tire pressure increases and decreases. The bladder, upon contraction, axially moves a spring-loaded piston so as to "pop out" the colored warning streamer. In another embodiment, a closely fitted spring-loaded piston without the bladder responds directly to changes in the tire pressure and spring motivates the colored warning streamer.