Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Reexamination Certificate
2009-06-04
2011-10-25
Thompson, Jewel V (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
Reexamination Certificate
active
08042411
ABSTRACT:
A vortex flowmeter and method includes a conduit for process fluid flow and a shedder disposed within the central bore of the conduit. First and second diaphragms are mounted in inner wall portions of the conduit, on opposite sides of the shedder. A sensor is disposed externally to the conduit, and is coupled to each diaphragm with fill tubes. The diaphragms respond to pressure variations generated by vortex shedding, and transmit pulse trains through the fill tubes to a sensor. The pulse trains, which are substantially out of phase with one another, are effectively synchronized with one another by reversing phase of one pulse train.
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Foxboro; I/A Series; 84 Series Intelligent Vortex Flowmeter; 2 pgs; Bulletin E38-5B 0609046 Nov. 2006; Foxboro, Foxboro, MA 02035-2099, USA.
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Brosnihan Paul F.
Lewicke Joseph J.
Invensys Systems Inc.
Sampson & Associates P.C.
Thompson Jewel V
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