Pressure sensor with dual chamber cover and corrugated membrane
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United States of America Patent
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Apr 12, 2011
Grant Date -
Feb 25, 2010
app pub date -
Oct 29, 2009
filing date -
Oct 18, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pressure sensor assembly for fitting within the valve stem of a vehicle tire comprises a substrate assembly defining a plurality of holes; a pressure sensor and a temperature compensation sensor mounted to the substrate assembly, each sensor including a corrugated deflectable membrane defining a first chamber and a cap mounted to the membrane to form a second chamber; and a cover configured to engage with the pressure sensor and the temperature compensation sensor to define an active chamber and a reference chamber respectively, the active chamber being exposed to tire pressure when the pressure sensor assembly is fitted within the valve stem whereas the reference chamber is sealed from tire pressure.
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