Measuring and testing – Fluid pressure gauge – Electrical
Reexamination Certificate
2006-04-25
2006-04-25
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Fluid pressure gauge
Electrical
Reexamination Certificate
active
07032456
ABSTRACT:
A pressure sensor includes a substrate having a top metallized pad formed on the top surface and a bottom metallized pad formed on the bottom surface. These pads are divided into segments for connection with piezoresistors. A sensing piezoresistor is formed on the substrate's top surface in order to respond to a pressure of interest. A reference piezoresistor is formed on the substrate's bottom surface to respond to a reference pressure. A conductive strip is joined between the two piezoresistors for conducting heat and electricity therebetween. A temperature measuring resistor can also be positioned on the substrate. The substrate and sensors can be positioned in a housing having electrical contacts in communication with the sensors for providing voltages in response to changing pressure differentials and temperatures.
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Bonanto George P
Kasischke James M.
Nasser Jean-Paul A.
Stanley Michael P.
The United States of America as represented by the Secretary of
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