Measuring and testing – Volume or rate of flow – By measuring tracer concentration
Reexamination Certificate
2007-04-24
2007-04-24
Thompson, Jewel V. (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring tracer concentration
Reexamination Certificate
active
10917161
ABSTRACT:
A method and apparatus for measuring fluid flow in a duct is disclosed. The invention uses a novel high velocity tracer injector system, an optional insertable folding mixing fan for homogenizing the tracer within the duct bulk fluid flow, and a perforated hose sampling system. A preferred embodiment uses CO2as a tracer gas for measuring air flow in commercial and/or residential ducts. In extant commercial buildings, ducts not readily accessible by hanging ceilings may be drilled with readily plugged small diameter holes to allow for injection, optional mixing where desired using a novel insertable foldable mixing fan, and sampling hose.
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Milner Joseph R.
The Regents of the University of California
Thompson Jewel V.
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