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Class Information
Number: 73/196
Name: Measuring and testing > Volume or rate of flow > System > Flow comparing
Description: Systems wherein two or more flows are constantly compared and their ratio indicated, or where comparison is made of the flow of the same stream at two or more points.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7552614 |
System and method for determining functionality or accuracy of a sensor |
Jun. 30, 2009 |
| 7487673 |
Ice detection based on anemometry |
Feb. 10, 2009 |
| 7266467 |
Method to calibrate hydraulic flow valves in situ |
Sep. 4, 2007 |
| 7249486 |
Method for monitoring a sensor |
Jul. 31, 2007 |
| 7162921 |
Measuring device for measuring the volume flow or the substance properties of a gas, whose direction of flow can reverse |
Jan. 16, 2007 |
| 6986283 |
Method and apparatus for exchanging fluid in a transmission system |
Jan. 17, 2006 |
| 6917891 |
Systems and methods for diagnosing and predicting fluid flow systems using sensors |
Jul. 12, 2005 |
| 6721674 |
Method and apparatus for in-situ calibration of quantity measurement of a fluid flowing in a channel |
Apr. 13, 2004 |
| 6659087 |
Detection of EVAP purge hydrocarbon concentration |
Dec. 9, 2003 |
| 6553827 |
Coolant safety method for welding apparatus |
Apr. 29, 2003 |
| 6377190 |
System for monitoring water consuming structures in an individual unit of a multi-unit building |
Apr. 23, 2002 |
| 6237408 |
Coolant safety system for automated welding apparatus |
May. 29, 2001 |
| 6234014 |
Method and apparatus for analyzing gas flow through conduits |
May. 22, 2001 |
| 6202475 |
Predicting logarithmic reduction values |
Mar. 20, 2001 |
| 6073483 |
Device for measuring the viscosity of a fluid |
Jun. 13, 2000 |
| 6026682 |
Coolant safety system for automated welding apparatus |
Feb. 22, 2000 |
| 6026838 |
Method for detecting opening in fluid flow passageway and shutting off flow in response thereto |
Feb. 22, 2000 |
| RE36401 |
Tandem rotor turbine meter and field calibration module |
Nov. 23, 1999 |
| 5950667 |
Apparatus for detecting opening in fluid flow passageway and shutting off flow in response thereto |
Sep. 14, 1999 |
| 5811674 |
Coolant safety system for welding apparatus |
Sep. 22, 1998 |
| 5808188 |
Flowbench and air flow measurement and calibration procedure |
Sep. 15, 1998 |
| 5739429 |
Powder coating system incorporating improved method and apparatus for monitoring flow rate of entrained particulate flow |
Apr. 14, 1998 |
| RE35639 |
Method and apparatus for measuring ratio of mass flow rates and energy flow in a gas pipeline |
Oct. 21, 1997 |
| 5520969 |
Method for in-situ liquid flow rate estimation and verification |
May. 28, 1996 |
| 5473932 |
Tandem rotor turbine meter and field calibration module |
Dec. 12, 1995 |
| 5455781 |
Apparatus and method for determining the measurement accuracy of electronic gas meters |
Oct. 3, 1995 |
| 5377101 |
Urinary flow classification system and method |
Dec. 27, 1994 |
| 5298886 |
Fluidic flowmeter equipped with a micro flow sensor |
Mar. 29, 1994 |
| 5226728 |
Method and apparatus for measuring mass flow and energy content using a differential pressure meter |
Jul. 13, 1993 |
| 5201581 |
Method and apparatus for measuring mass flow and energy content using a linear flow meter |
Apr. 13, 1993 |
| 5095983 |
Multiphase production evaluation method using thru-tubing, wireline packoff devices |
Mar. 17, 1992 |
| 5050438 |
Method and apparatus for measuring the flow of heavy crude |
Sep. 24, 1991 |
| 5003810 |
Fluid meter |
Apr. 2, 1991 |
| 4938053 |
Fluid metering system |
Jul. 3, 1990 |
| 4930343 |
Apparatus for measuring and controlling fluid flow across a boundary |
Jun. 5, 1990 |
| 4928048 |
Fast response control circuit |
May. 22, 1990 |
| 4905511 |
Fan assembly and a method for checking the function thereof |
Mar. 6, 1990 |
| 4850220 |
Apparatus for measuring amount of ultrafiltrate and concentration of receiving solvent in dialysis |
Jul. 25, 1989 |
| 4781068 |
Differential mass flowmeter |
Nov. 1, 1988 |
| 4778107 |
Fuel injection valve assembly and an assembling method therefor |
Oct. 18, 1988 |
| 4753095 |
Method for determining real gas effects in critical flow nozzles |
Jun. 28, 1988 |
| 4750523 |
Active attenuator and method |
Jun. 14, 1988 |
| 4706492 |
Method and apparatus for determining real gas effects in critical flow nozzles |
Nov. 17, 1987 |
| 4630474 |
Flow analyzer |
Dec. 23, 1986 |
| 4604902 |
Means and techniques useful in mass flowmeters for multiphase flows |
Aug. 12, 1986 |
| 4603707 |
Purge block for gas systems |
Aug. 5, 1986 |
| 4552059 |
Flow measurement for exhaust-type canopy and ventilating hood |
Nov. 12, 1985 |
| 4542650 |
Thermal mass flow meter |
Sep. 24, 1985 |
| 4534320 |
Method for determining the amount of dissolved oxygen from above and below water level air leakage in a steam power plant |
Aug. 13, 1985 |
| 4512200 |
Pulverized coal relative distribution meter |
Apr. 23, 1985 |
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