Measuring and testing – Fluid pressure gauge – Diaphragm
Reexamination Certificate
2007-09-20
2009-12-01
Caputo, Lisa M (Department: 2855)
Measuring and testing
Fluid pressure gauge
Diaphragm
C073S715000, C073S716000, C073S753000
Reexamination Certificate
active
07624642
ABSTRACT:
A differential pressure transmitter includes first and second process fluid inlets. A differential pressure sensor is disposed within the transmitter and has first and second sensor inlets. A first isolator diaphragm is located proximate the first process fluid inlet and is operably coupled to the first sensor inlet through a first fill fluid volume. A second isolator diaphragm is located proximate the second process fluid inlet and is operably coupled to the second sensor inlet through a second fill fluid volume. Measurement circuitry is operably coupled to the differential pressure sensor and configured to measure an electrical parameter of the sensor and provide an indication of the measured parameter. A third fluid volume substantially surrounds the differential pressure sensor. The third fluid volume exerts a compressive force on the differential pressure sensor.
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Search Report and Written Opinion for application no. PCT/US2008/075194, mailed Nov. 26, 2008.
Caputo Lisa M
Christenson Christopher R.
Jenkins Jermaine
Rosemount Inc.
Westman Champlin & Kelly P.A.
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