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Class Information
Number: 73/861.28
Name: Measuring and testing > Volume or rate of flow > By measuring vibrations or acoustic energy > Transit time of acoustic waves > Transmitted along single path
Description: Subject matter wherein the acoustic waves are transmitted upstream and downstream along the same path.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7552652 |
Device for determining and/or monitoring the volume-and/or mass-flow of a medium |
Jun. 30, 2009 |
| 7549346 |
Flowmeter element, mass flowmeter and mass flow measurement system |
Jun. 23, 2009 |
| 7543508 |
Zero crossing detection of an ultrasonic signal with variable threshold value |
Jun. 9, 2009 |
| 7500402 |
Ultrasonic flow rate measuring device |
Mar. 10, 2009 |
| 7448282 |
Device for determining and/or monitoring volume and/or mass flow of a medium |
Nov. 11, 2008 |
| 7389786 |
Ultrasonic and sonic odorization systems |
Jun. 24, 2008 |
| 7380470 |
Ultrasonic flow meter including turbulators |
Jun. 3, 2008 |
| 7363174 |
Apparatus and method for measuring a fluid flow rate profile using acoustic doppler effect |
Apr. 22, 2008 |
| 7360450 |
Flowmeter |
Apr. 22, 2008 |
| 7290455 |
Driver configuration for an ultrasonic flow meter |
Nov. 6, 2007 |
| 7254494 |
Ultrasonic signal processing method and applications thereof |
Aug. 7, 2007 |
| 7181981 |
Ultrasonic tomograph, system and method for ultrasonic tomographic measurement using same |
Feb. 27, 2007 |
| 7124621 |
Acoustic flowmeter calibration method |
Oct. 24, 2006 |
| 7073395 |
Ultrasonic flowmeter and ultrasonic flow rate measuring method |
Jul. 11, 2006 |
| 6925891 |
Ultrasonic flowmeter and method of measuring flow volume |
Aug. 9, 2005 |
| 6912907 |
Ultrasonic apparatus and method for measuring the concentration and flow rate of gas |
Jul. 5, 2005 |
| 6907361 |
Ultrasonic flow-measuring method |
Jun. 14, 2005 |
| 6901812 |
Single-body dual-chip Orthogonal sensing transit-time flow device |
Jun. 7, 2005 |
| 6895825 |
Ultrasonic transducer assembly for monitoring a fluid flowing through a duct |
May. 24, 2005 |
| 6772643 |
Flow meter |
Aug. 10, 2004 |
| 6745632 |
Method for measuring ultrasonic transit times |
Jun. 8, 2004 |
| 6729191 |
Electrical inductive flowmeter circuits including coil excitors and current regulators |
May. 4, 2004 |
| 6708570 |
Flow rate measurement method, ultrasonic flow rate meter, flow velocity measurement method, temperature or pressure measurement method, ultrasonic thermometer and ultrasonic pressure gage |
Mar. 23, 2004 |
| 6691582 |
Gas type identification system |
Feb. 17, 2004 |
| 6675111 |
Method and apparatus for measuring flow velocity and method and apparatus for measuring flow rate |
Jan. 6, 2004 |
| 6647806 |
Turbulence conditioner for use with transit time ultrasonic flowmeters |
Nov. 18, 2003 |
| 6644119 |
Noninvasive characterization of a flowing multiphase fluid using ultrasonic interferometry |
Nov. 11, 2003 |
| 6634240 |
Zero crossing detector and method of determining a zero crossing point |
Oct. 21, 2003 |
| 6625549 |
Equipment specifying system |
Sep. 23, 2003 |
| 6609430 |
Low profile transducer for flow meters |
Aug. 26, 2003 |
| 6604433 |
Ultrasonic transducer and ultrasonic flowmeter |
Aug. 12, 2003 |
| 6568281 |
Ultrasonic-wave propagation-time measuring method, gas-pressure measuring method, gas-flow rate measuring method, and gas sensor |
May. 27, 2003 |
| 6552336 |
Non-invasive, opto-acoustic water current measurement system and method |
Apr. 22, 2003 |
| 6546810 |
Process and device for measuring the velocity of flow of a fluid stream |
Apr. 15, 2003 |
| 6526838 |
Ultrasonic fluid meter with improved resistance to parasitic ultrasound waves |
Mar. 4, 2003 |
| 6508135 |
Liquid flow meter |
Jan. 21, 2003 |
| 6487916 |
Ultrasonic flow metering system |
Dec. 3, 2002 |
| 6453757 |
Symmetrical ultrasound gas flow meter housing and related multi-configuration gas flow meter assembly |
Sep. 24, 2002 |
| 6435038 |
Ultrasonic flow velocity measuring apparatus |
Aug. 20, 2002 |
| 6418796 |
Sonic flow measurement apparatus for tubes including sonically matched plates |
Jul. 16, 2002 |
| 6411909 |
Device for measuring the fluid consumption of a user over a given time |
Jun. 25, 2002 |
| 6382033 |
Sound damper for ultrasonic waves |
May. 7, 2002 |
| 6381549 |
System and method using digital filters and neural networks to determine fluid flow |
Apr. 30, 2002 |
| 6338277 |
Flowmeter for attenuating acoustic propagations |
Jan. 15, 2002 |
| 6330831 |
Stream-cleaned differential reflection coefficient sensor |
Dec. 18, 2001 |
| 6305233 |
Digital speed determination in ultrasonic flow measurements |
Oct. 23, 2001 |
| 6216091 |
Ultrasonic measurement system with molecular weight determination |
Apr. 10, 2001 |
| 6209388 |
Ultrasonic 2-phase flow apparatus and method |
Apr. 3, 2001 |
| 6178827 |
Ultrasonic flow sensor |
Jan. 30, 2001 |
| 6098467 |
Acoustic flow meter wherein false readings are identified dependent on upstream and downstream acoustic transit times |
Aug. 8, 2000 |
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