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Class Information
Number: 73/215
Name: Measuring and testing > Volume or rate of flow > Weir type
Description: Meters having means for metering by determining the effect upon a flow in an open channel of a constriction, such as a weir. More than a mere graduated water gate must be included. The term "open channel" is intended to include any flow channel wherein the surface of the liquid above and below the constriction is subjected to the same pressure.










Sub-classes under this class:

Class Number Class Name Patents
73/216 Submerged orifice or discharge nozzle 15


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
7343794 Weir box and sensor Mar. 18, 2008
7311001 Multiphase flow measurement apparatus and method Dec. 25, 2007
6907779 Continuous flow measurement recorder and recording method Jun. 21, 2005
6823729 Measuring weir for measuring flow volume at an overflow Nov. 30, 2004
6340243 Liquid/gas phase detector system Jan. 22, 2002
6324906 Double chamber container for metering liquid flow Dec. 4, 2001
6053039 Apparatus for the measurement of liquid flow Apr. 25, 2000
5877417 Flow meter Mar. 2, 1999
RE36069 Portable wastewater flow meter Feb. 2, 1999
5852240 Portable flow measuring device Dec. 22, 1998
5808195 Arrangement for determining liquid velocity versus depth utilizing historical data Sep. 15, 1998
5726358 Method and device for measuring the discharge in partly filled or completely filled ducts and in open channels Mar. 10, 1998
5635637 Apparatus for measuring the flow rate of a fluid Jun. 3, 1997
RE35503 Apparatus and technique for metering liquid flow May. 13, 1997
5608171 Distributed, unattended wastewater monitoring system Mar. 4, 1997
5467650 Open channel flowmeter Nov. 21, 1995
5423226 Flow measurement system Jun. 13, 1995
5327787 Electromagnetic flow meter with weir Jul. 12, 1994
5313833 Milk flow meter May. 24, 1994
5199306 Method and apparatus for metering flow in closed conduits that surcharge Apr. 6, 1993
5186052 Storm water flow monitoring Feb. 16, 1993
5156489 Adjustable flume Oct. 20, 1992
5083459 Flow meter Jan. 28, 1992
5035139 Process and a device for carrying out measurements at a foaming liquid Jul. 30, 1991
5024084 Flow meter for liquid doctored through Fourdrinier fabric at wet end of Fourdrinier paper machine Jun. 18, 1991
5005428 Inverted weir for conduit Apr. 9, 1991
4896542 Portable wastewater flow meter Jan. 30, 1990
4896539 Spray calibration device and method Jan. 30, 1990
4799388 Apparatus and technique for metering liquid flow Jan. 24, 1989
4715225 Flow meter for measuring the flow rate of liquid Dec. 29, 1987
4671119 Flow measuring device for partially filled conduits Jun. 9, 1987
4571997 Flow measuring apparatus Feb. 25, 1986
4552017 Apparatus for measuring flow-rate of electromagnetic granular media Nov. 12, 1985
4480466 Apparatus and method for determining liquid flowrate Nov. 6, 1984
4476719 Liquid measuring devices Oct. 16, 1984
4467645 Weir Aug. 28, 1984
4459859 Flowmeter Jul. 17, 1984
4452176 Milk flow meter Jun. 5, 1984
4423627 Flow meter Jan. 3, 1984
4407353 Waste heat recovery device for preventing corrosion by sulfur oxides Oct. 4, 1983
4393451 Method and apparatus for measuring total liquid volume flow Jul. 12, 1983
4384485 Device for indicating liquid level May. 24, 1983
4367652 Method and apparatus for monitoring wastewater Jan. 11, 1983
4353251 Mounting apparatus for liquid flow meter Oct. 12, 1982
4346596 Milk flow measurement apparatus Aug. 31, 1982
4321826 Flowmeter for fluid flow through weirs and parshall flumes Mar. 30, 1982
4291693 Fluid metering device Sep. 29, 1981
4279148 Anti-clogging flume and structure for metering fluid flow Jul. 21, 1981
4267978 Liquid distribution device in liquid-vapor contact apparatus May. 19, 1981
4252132 Midstream urine specimen collecting device Feb. 24, 1981

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