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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:

Class Number Class Name Patents
73/861.29 In both directions simultaneously 111


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
6058786 Device for measuring a gas flow May. 9, 2000
6055868 Ultrasonic flow meter May. 2, 2000
6053054 Gas flow rate measurement apparatus and method Apr. 25, 2000
6044714 Flowmeter for explosion-hazard environments Apr. 4, 2000
6041663 Method and device for determining the flow velocity and/or throughput of a flowing fluid Mar. 28, 2000
6012338 Ultrasonic flow velocity measuring apparatus Jan. 11, 2000
5983730 Method and apparatus for measuring the time of flight of a signal Nov. 16, 1999
5970800 Method of determining the mass flow of a flow of grains Oct. 26, 1999
5918281 Personal speedometer Jun. 29, 1999
5905207 Process for measuring the flow rate of a fluid May. 18, 1999
5856622 Clamp-on type ultrasonic flow meter and a temperature and pressure compensation method therein Jan. 5, 1999
5835884 Method of determining a characteristic of a fluid Nov. 10, 1998
5831175 Method and apparatus for correcting temperature variations in ultrasonic flowmeters Nov. 3, 1998
5817949 Ultrasonic flow meter and method Oct. 6, 1998
5818735 Method and system for high resolution time-of-flight measurements Oct. 6, 1998
5814737 Apparatus and method of detecting an ultrasonic signal Sep. 29, 1998
5811689 Fluid flow meter Sep. 22, 1998
5796009 Method for measuring in a fluid with the aid of sing-around technique Aug. 18, 1998
5792965 Mode suppression in fluid meter conduits Aug. 11, 1998
5777892 Doppler shift velocity measuring system with correction factors Jul. 7, 1998
5777237 Fluid flow meter Jul. 7, 1998
5777278 Multi-phase fluid flow measurement Jul. 7, 1998
5753824 Sampling method and apparatus for use with ultrasonic flowmeters May. 19, 1998
5748504 Calibration method for use with ultrasonic flowmeters May. 5, 1998
5747749 Acoustic logging to identify oil flow rate May. 5, 1998
5728948 Fluid meter construction Mar. 17, 1998
5729180 Control of VCO in ultrasonic flow meter Mar. 17, 1998
5717145 Detector for an ultrasonic flow meter Feb. 10, 1998
5710379 Apparatus and method for determining a flow count Jan. 20, 1998
5705753 Apparatus for determining fluid flow Jan. 6, 1998
5668326 Method and apparatus for detecting and aligning a signal Sep. 16, 1997
5650572 Device for ultrasonic flow measurement Jul. 22, 1997
5650571 Low power signal processing and measurement apparatus Jul. 22, 1997
5645071 Method for the measurement of the molar mass of gases or gas mixtures and an apparatus for the performance of the method Jul. 8, 1997
5639971 Method and apparatus for detecting a signal Jun. 17, 1997
5627323 Ultrasonic binary gas measuring device May. 6, 1997
5597962 Apparatus for determining fluid flow Jan. 28, 1997
5594181 Ultrasonic flow meter Jan. 14, 1997
5553505 Electronic fluid flow meter Sep. 10, 1996
5546812 Method and device for determining characteristics of the flow of a medium Aug. 20, 1996
5526699 Ultrasonic gas flow measurement method and apparatus Jun. 18, 1996
5493916 Mode suppression in fluid flow measurement Feb. 27, 1996
5467321 Insertion ultrasonic transducer with mode conversion and method for reducing multiple signal reception Nov. 14, 1995
5463906 Interchangeable disposable acoustic for use with an ultrasonic flowmeter, particularly during extracorporeal measurement of blood flow Nov. 7, 1995
5461931 Measurement system Oct. 31, 1995
5440936 Compact x-cross transducer array for a transit time flowmeter, particularly for use during in-vivo blood flow measurement Aug. 15, 1995
5433117 Ultrasonic gas meter Jul. 18, 1995
5421212 Method and device in acoustic flow measurement for ensuring the operability of said measurement Jun. 6, 1995
5419326 Spirometer, more particularly an ultrasonic spirometer May. 30, 1995
5392645 Method and apparatus for flow rate measurement Feb. 28, 1995

1 2 3 4 5 6










 
 
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