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Portable wastewater flow meter

United States Patent

RE36,069
February 2, 1999
View the Complete Patent at the US Patent & Trademark Office
A portable wastewater flow meter particularly adapted for temporary use at a single location in measuring the rate of liquid flow in a circular entrance conduit of a sewer manhole both under free flow and submerged, open channel conditions and under fill pipe, surcharged conditions, comprising an apparatus having a cylindrical external surface and an inner surface that constricts the flow through the apparatus in such a manner that a relationship exists between (1) the difference between the static pressure head of liquid flowing through the entrance of the apparatus and the static pressure head of liquid flowing through the constriction, and (2) the rate of liquid flow through the apparatus.
Hunter; Robert M. (Bozeman, MT)
07/ 828,528
January 29, 1992
This application discloses improvements that were discovered during research funded by the U.S. Department of Energy under the Energy-Related Inventions Program. The invention is described in detail in a report entitled "The Flumeter.TM.: A New Tool for Wastewater Management" prepared for the U.S. Department of Energy by Yellowstone Environmental Science, Bozeman, Mont., May 1988.