Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate
2007-08-28
2007-08-28
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
Using differential pressure
C073S861520
Reexamination Certificate
active
11324830
ABSTRACT:
A flowmeter is provided that comprises a leadframe assembly (140) and a body (144) disposed at least partially around the leadframe assembly (140). The body (144) has a flow passage therethrough that comprises a first channel (178) having a first port (166), a second channel (180) having a second port (168), and a flow altering element (182) disposed within the second channel (180). First and second pressure sensors (174and176) are disposed within the body (144) and coupled to the leadframe assembly (140) for measuring a first pressure within the first channel (178) and a second pressure within the second channel (180), respectively. An integrated circuit (155), which is coupled to the leadframe assembly (140), to the first pressure sensor (174), and to the second pressure sensor (176), is configured to determine the rate of flow through the flow passage from the first pressure and the second pressure.
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patent: 6445053 (2002-09-01), Cho
patent: 6683370 (2004-01-01), McDonald et al.
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McDonald William G.
Monk David J.
Ingrassia Fisher & Lorenz
Patel Harshad
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