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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
8639462 Method and system for determining the time-of-flight of a signal Jan. 28, 2014
8590397 Ultrasonic flow meter including a transducer having conical face Nov. 26, 2013
8584531 Ultrasonic gas flow measurement device including a dumbbell-shaped flow tube to increase gas flow speed Nov. 19, 2013
8544343 Chordal gas flowmeter with transducers installed outside the pressure boundary Oct. 1, 2013
8548755 Flow rate measurement device Oct. 1, 2013
8544344 Ultrasonic type flow sensor Oct. 1, 2013
8534138 Chordal gas flowmeter with transducers installed outside the pressure boundary, housing and method Sep. 17, 2013
8528418 Flow meter having a thermal decoupling element separating an ultrasonic transducer and the flow pipe Sep. 10, 2013
8522624 System and method for pressure balancing a flow meter Sep. 3, 2013
8522623 Ultrasonic flowmeter having pressure balancing system for high pressure operation Sep. 3, 2013
8505391 Flange mounted ultrasonic flowmeter Aug. 13, 2013
8490498 Measuring tube of a measuring system for determining and/or monitoring flow of a measured medium through a measuring tube by means of ultrasound Jul. 23, 2013
8485045 Foam free testing systems and methods Jul. 16, 2013
8489342 Methods and apparatus for fluid flow measurement Jul. 16, 2013
8474327 Flow meter assembly, gate assemblies and methods of flow measurement Jul. 2, 2013
8413524 Acoustic matching member, ultrasonic transmitter/receiver, and ultrasonic flowmeter Apr. 9, 2013
8412481 Method and apparatus for determining operational condition of pollution monitoring equipment Apr. 2, 2013
8408072 Coupling element for an ultrasonic flow measuring device Apr. 2, 2013
8374806 Ultrasonic phase-shift detection device Feb. 12, 2013
8356522 Ultrasonic flow meter with a liquid drainage system Jan. 22, 2013
8347733 Conditioner, apparatus and method Jan. 8, 2013
8347734 Method and measuring system for determining and/or monitoring flow of a measured medium in a measuring tube Jan. 8, 2013
8245581 Flowmeter and method Aug. 21, 2012
8239157 Method and apparatus for directing the use of a coriolis flow meter Aug. 7, 2012
8215183 Augmented surface sensor for measuring flow velocity Jul. 10, 2012
8181536 Ultrasonic Flow Meter including a transducer having conical face May. 22, 2012
8170812 Method and system for detecting deposit buildup within an ultrasonic flow meter May. 1, 2012
8141434 Flow measuring apparatus Mar. 27, 2012
8103461 Method for determining the temporal position of a wave packet and flow measuring device Jan. 24, 2012
8091435 Ultrasonic measuring arrangement Jan. 10, 2012
8065922 Flow metering device for an aspirated smoke detector Nov. 29, 2011
8047082 Device for determining a mass flow of a first gas within an overall mixture of gases Nov. 1, 2011
7987731 Ultrasonic flowmeter including an oscillation start unit for acceleration stability of the oscillator Aug. 2, 2011
7975559 Apparatus for attenuating ultrasonic waves propagating within a pipe wall Jul. 12, 2011
7966893 Adjusting transducer frequency without ceasing fluid flow through a meter Jun. 28, 2011
7963176 Clamp-on ultrasonic flow rate measuring device having a guide frame for guiding the ultrasonic transducer Jun. 21, 2011
7963177 Apparatus for attenuating ultrasonic waves propagating within a pipe wall Jun. 21, 2011
7954387 Ultrasonic transducer device Jun. 7, 2011
7934432 Method for measuring the run time of an ultrasonic pulse in the determination of the flow velocity of a gas in a breathing gas volume flow sensor May. 3, 2011
7925456 Method and apparatus for directing the use of a Coriolis flow meter Apr. 12, 2011
7911306 Transformer board Mar. 22, 2011
7886615 Method for monitoring an ultrasound flowmeter system and/or process Feb. 15, 2011
7832282 Ultrasonic flow measurement system and method Nov. 16, 2010
7810399 Ultrasonic flowmeter Oct. 12, 2010
7795783 Transducer assembly Sep. 14, 2010
7784358 Flow metering device for a plurality of fluid carriers Aug. 31, 2010
7752918 Apparatus and method for measuring a fluid flow parameter within an internal passage of an elongated body Jul. 13, 2010
7694565 Acoustic method for measuring a signal propagation time in a medical liquid and device for using this method Apr. 13, 2010
7673527 Flow cell for measuring flow rate of a fluid using ultrasonic waves Mar. 9, 2010
7552652 Device for determining and/or monitoring the volume-and/or mass-flow of a medium Jun. 30, 2009

1 2 3 4 5 6

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