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| Number | Title | Issue Date |
| 8136413 | Bi-directional oscillating jet flowmeter A bi-directional flowmeter comprises a first fluidic oscillator device arranged to measure the flow of fluid in a first direction and a second fluidic oscillator device arranged to measure the flow of fluid in a second direction opposite to the first direction and i... | 03/20/2012 |
| 8091434 | Fluidic oscillator flow meter The present invention discloses a feedback type, hydrodynamic oscillator flow meter for measuring the flow of fluids such as gas, air, water and oil, flowing through a conduit. This flow meter gives very accurate measurements over a long period of time since piezoel... | 01/10/2012 |
| 7827870 | Meter A fluidic oscillator liquid flow meter comprising a body having an inlet portion to receive a flow of liquid to be measured, an outlet portion, a main channel defining a flow path between the inlet and outlet, the flow path including feedback structure to induce osc... | 11/09/2010 |
| 7481119 | Micro-fluidic oscillator having a sudden expansion region at the nozzle outlet A micro-fluidic oscillator comprises a main body and a cover body for covering the main body. An oscillation chamber is disposed on the main body to provide an oscillation space for fluid. A sudden-expansion micro-nozzle is connected with one end of the oscillation ... | 01/27/2009 |
| 7464609 | Means for measuring fluid flow in a pipe A means for measuring fluid flow through or into a pipe comprises a fluidistor element (11) arranged in a wall of a pipe splicing piece (10) inserted between sections of the pipe. A pressure sensor (3, 12) senses oscillations in the fluidistor e... | 12/16/2008 |
| 7383740 | Spirometer Pocket-size medical spirometer comprising a housing and a measurement unit (MU), for measuring rate of total flow when a user exhales through the spirometer. The MU comprises a fluidic jet oscillator adapted to generate oscillating flow with frequency dependent on t... | 06/10/2008 |
| 7367230 | Flow rate detector and flow controller A path detector is constructed so that a path block body, which forms a given path and which has a flow sensor interposed in the path, and a circuit board having an electric circuit mounted thereon are accommodated in a rectangular parallelepiped or cubic housing. A... | 05/06/2008 |
| 7360446 | Ceramic oscillation flow meter having cofired piezoresistive sensors An apparatus is provided for measuring the amount of fluid (21) flowing in a channel (18, 20). The apparatus comprises a fluidic oscillation flow meter (10) including a housing (14) defining an inlet (16) for receiving the fluid ( | 04/22/2008 |
| 7287502 | Air intake device for internal combustion engine An air intake apparatus for an internal combustion engine includes an air intake manifold that has a plurality of branch pipes that are connected to an internal combustion engine and has a collecting pipe to which a throttle body is connected, in which an air intake... | 10/30/2007 |
| 7204157 | Modular utility meter A modular utility meter, for example, a water meter, is provided which comprises a meter base and a meter head. The output signal from a transducer in the meter base is processed in the meter head to calculate the utility supply. The processing includes linearizatio... | 04/17/2007 |
| 7204156 | Fuel cell system having fluidic oscillation flow meter An apparatus (10) is provided for determining the flow rate of a gas. The apparatus comprises a housing (12) forming a vaporization chamber (14) for converting a fluid into a gas vapor when subjected to heat (22). An oscillation flow mete... | 04/17/2007 |
| 7177758 | Method for optimizing characteristics map A method for optimizing characteristics maps for the control of an internal combustion engine in which a model of the internal combustion engine is first formed by measurements on the internal combustion engine. In the process, a dependency of output variables of th... | 02/13/2007 |
| 7094208 | Spirometer A spirometer for measuring fluid flow, particularly associated with exhalation of respiratory patients. The spirometer of this invention preferably has a fluidic oscillator wherein the fluid oscillates within a chamber of the fluidic oscillator. An oscillation frequ... | 08/22/2006 |
| 7038780 | Method for sensing acoustic energy A method for sensing acoustic energy as the energy passes from a more dense to a less dense medium while compensating for energy level loses that may have occurred along the acoustic path of the acoustic energy. The method may be used to replace a multi-sensor syste... | 05/02/2006 |
| 6976507 | Apparatus for creating pulsating fluid flow A fluidic oscillator is disclosed, wherein the fluidic oscillator includes a fluid source and a housing coupled to the fluid source. At least one recess is formed within the housing. An insert resides within each at least one recess; the insert provides at least one... | 12/20/2005 |
| 6952970 | Modular utility meter A modular utility meter (1), for example, a water meter, is provided which comprises a meter base (2) and a meter head (3). The output signal from a transducer in the meter base (2) it processed in the meter head (3) to calculate t... | 10/11/2005 |
| 6932635 | Electronic component testing socket and electronic component testing apparatus using the same To control the temperature of an electronic component testing socket without mixing any noise into a test signal to be applied to an electronic component and a respond signal to be read from the electronic component when conducting a test on the electronic component... | 08/23/2005 |
| 6860157 | Fluidic oscillator A fluidic oscillator includes an oscillator body having two attachment walls defining an oscillating chamber therebetween, an inlet duct communicatively extended from the oscillating chamber for guiding a flow of fluid entering into the oscillating chamber, an outle... | 03/01/2005 |
| 6829947 | Acoustic Doppler downhole fluid flow measurement apparatus and system are disclosed for in situ measurement of downhole fluid flow using Doppler techniques. First, a baseline speed of sound is established as close to the desired measurement point as possible. This speed of sound measurement is then used in Doppler... | 12/14/2004 |
| 6581475 | Fluid meter with improved compactness The invention relates to a fluid meter comprising an outside wall of determined thickness to which a flange connected to a pipe is fixed via fixing members which penetrate into holes organized respectively in the thickness of said flange and in said outsi... | 06/24/2003 |
| 6553844 | Property-independent volumetric flowmeter and sonic velocimeter A single fluidic feedback oscillator incorporates two independent time event measurement means, resulting in a highly accurate volumetric flowmeter that is independent of the properties and composition of the flowing fluid. Under certain circumstances, wh... | 04/29/2003 |
| 6552336 | Non-invasive, opto-acoustic water current measurement system and method A method and system are provided for measuring water current. An acoustically-modulated beam of radiation is transmitted to a target location on the surface of a body of water. As the beam transits the water, acoustic radiation propagates away from the be... | 04/22/2003 |
| 6477900 | Fluidic gas metering system A fluidic gas metering system interposed in a line running from a gas source to a user site to meter the gas stream being supplied to the user in a broad flowrate range defined by a low flowrate band at the lower end of the range, a medium band at the mid... | 11/12/2002 |
| 6279386 | Meter for measuring the volume of a flowing fluid A meter for measuring the volume of a flowing fluid includes a viscosensitive unit through which the fluid flows under laminar flow conditions, a first fluidic oscillator in series with the viscosensitive unit, and a second fluidic oscillator shunting at ... | 08/28/2001 |
| 6250132 | Method and apparatus for real time gas analysis A modular apparatus for analyzing a fluid includes a disposable fluidic sensor module, a replaceable transducer module, and an expendable electronics package. The disposable fluidic sensor includes a fluidic flowmeter and a capillary structure formed in a... | 06/26/2001 |
| 6226598 | Method of measuring the propagation time of a sound signal in a fluid by means of a zero-crossing of said sound signal Measuring the propagation time of a sound signal between two spaced-apart transducers disposed in a fluid flow involves determining the zero-crossing of the signal. Each received sound signal is sampled and digitized, then for each period of the sampled a... | 05/01/2001 |
| 6173617 | Cell for converting differential pressure into an electric signal A cell for converting a differential pressure into an electric signal, which comprises two chambers and a sensor. The two chambers are filled with an incompressible fluid and each are closed by a respective membrane suitable for deforming under the action... | 01/16/2001 |
| 6131470 | Fluidic meter of reduced size The invention concerns a fluid meter including a body comprising a fluid intake opening and a fluid evacuation opening aligned along a first direction A, a measuring unit formed of a fluid oscillator including at least one obstacle disposed into an oscill... | 10/17/2000 |
| 5959216 | Method of conditioning a fluid flow, and a fluid flow conditioner A method of conditioning a fluid flow from a first area to a second area downstream from the first area. The flow coming from the first area is directed in a longitudinal direction. The cross-section of flow is increased, and the flow is split by means of... | 09/28/1999 |
| 5889213 | Apparatus for measuring a fluid flow rate, the apparatus including at least one element for modifying the speed profile of said fluid flow An apparatus measures the flow rate of a fluid. The apparatus comprises a fluidic oscillator provided with an elongate slot in a direction Oz and suitable for forming a jet of fluid that oscillates in a plane Oxy perpendicular to the Oz direction, and an ... | 03/30/1999 |
| 5827976 | Fluidic flow meter with fiber optic sensor A fluidic flow meter comprising a fluidic oscillator having an oscillation chamber, a power nozzle for issuing a jet of fluid into the oscillation chamber, an outlet for issuing fluid from the oscillation chamber. A bendable fiber optic wave guide loop ha... | 10/27/1998 |
| 5747749 | Acoustic logging to identify oil flow rate A method and apparatus for determining the various components of a multi-phase fluid flow in a defined area includes using an acoustic transceiver tool to direct a beam of acoustic energy toward the fluid flow in a producing well or a horizontal line. A s... | 05/05/1998 |
| 5574228 | System for measuring fluid oscillator signals A system for measuring the frequency of oscillation of the fluid in a fluid oscillator comprising detector means, a peak detector comprising a threshold device receiving a first signal from the detector means, means for storing the signal at the output of... | 11/12/1996 |
| 5554976 | Method and apparatus for detecting abnormality in gas supply equipment An abnormality detecting apparatus constantly monitors even a slight amount of gas which has leaked by checking a gas supply pipe when it is determined that the pressure regulating function of a pressure regulator is abnormal. The abnormality detecting ap... | 09/10/1996 |
| 5503035 | Ultrasonic fluid vibrating flowmeter An ultrasonic fluid vibrating type flowmeter comprising a set of ultrasonic transmitter and ultrasonic receiver mounted on a pipe carrying the fluid whose flow rate is to be measured; driving device for intermittently driving the transmitter using burst w... | 04/02/1996 |
| 5406840 | Supplying fluid A package burner has a fan rotatably driven at constant speed. Air from the surrounding atmosphere is induced by the fan through an open end of a conduit which guides the air to the fan from which the air is propelled down an outlet passage to mix as comb... | 04/18/1995 |
| 5396809 | Flow meter having a fluidic oscillator A fluidic oscillator flowmeter in which a two-dimensional fluid jet oscillating transfersely relative to a plane of symmetry, P, sweeps over the bottom of a cavity, and in which the flow rate is determined by electronic means from a signal, S, correspondi... | 03/14/1995 |
| 5396808 | Fluidic oscillator A fluidic oscillator and a flowmeter comprising means (10, 14, 16) for forming a two-dimensional fluid jet and an obstacle (22) having a main cavity (26) swept by the oscillating jet, and secondary cavities (34, 36) on either side of the main cavity (26) ... | 03/14/1995 |
| 5363704 | Fluidic oscillator and a flow meter including such an oscillator A fluidic oscillator and a flow meter including such a fluidic oscillator comprising a fluid inlet suitable for forming a two-dimensional jet: an obstacle possessing a front portion in the form of a chamber facing the inlet on the path of the jet, said ch... | 11/15/1994 |
| 5339695 | Fluidic gas flowmeter with large flow metering range The present invention provides a wide range fluid flowmeter, having a body with a central air flow passage and a target in the air flow passage to direct fluid flow to one of the first and second flow loops. The fluid alternates between the first and seco... | 08/23/1994 |
