Valve stem pressure poppet

Details Valve stem pressure poppet Valve stem pressure poppet

2006-03-21

2006-03-21

Fulton, Christopher W. (Department: 2859)

Signals and indicators

Vehicle

Tire inflation or deflation

C116S266000, C116S276000, C073S146800, C073S146300

Reexamination Certificate

active

07013833

ABSTRACT:
A valve stem pressure poppet incorporated into a tire valve cap for monitoring tire air pressure. The indicator assembly is screw attached by a connector onto an existing valve stem. The assembly includes a hollow outer tube for housing a slideably disposed indicator, a sealed space above the indicator, a compression spring and a connector end fitting. An air passage runs throughout the length the indicator. Once the assembly is engaged, pressurized air feeds directly through the indicator into the sealed space, forcing the indicator down against the force of the compression spring. If the tire remains above a predetermined critical low pressure point, the indicator will remain in the down “equilibrium” position. However, if the air pressure in the tire drops below the critical pressure point the compression force of the spring will overcome the downward pressure on the indicator, and the indicator disengages or “pops” up.

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