Proportional Patents (Class 73/202)
  • Patent number: 10768033
    Abstract: The object of the invention is to obtain a thermal flowmeter which effectively causes water droplets to be directed to a discharge port when the water droplets adhered to a wall surface of a first passage are drawn into a third passage portion. A thermal flowmeter of the present invention includes a sub-passage that takes a measurement gas flowing through a main passage; and a flow detection unit that measures a flow rate of the measurement gas by performing heat transfer with the measurement gas flowing through a sub-passage. Further, the sub-passage includes a first passage, a second passage portion branching in the middle of the first passage portion to be directed toward the flow detection unit; and a third passage portion branching in the middle of the second passage portion to be directed toward a third outlet, and a pressure loss generation means is provided between a third inlet and the third outlet of the third passage portion.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: September 8, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Tomoaki Saito, Shinobu Tashiro, Naoki Saito, Masashi Fukaya, Akira Uenodan
  • Patent number: 10634534
    Abstract: A flow sensing module with a bypass channel is provided. The flow sensing module may include a body portion and a flow sensor. The body portion may include a main fluid inlet, a main fluid outlet, a main fluid channel extending between the main fluid inlet and the main fluid outlet, a bypass fluid inlet and a bypass fluid outlet each configured to be in communication with the main fluid channel, and a bypass fluid channel extending between the bypass fluid inlet and the bypass fluid outlet. The flow sensor may be disposed in the bypass fluid channel to sense a flow rate of a fluid in the bypass channel. No pressure drop element is disposed in the main fluid channel, so the main fluid channel may have a pressure loss of a very small value. Moreover, linearity and sensitivity of the flow sensing module may also be improved.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: April 28, 2020
    Assignee: MEMSIC TRANSDUCER SYSTEMS CO., LTD.
    Inventors: Nan Jou Pern, Ohlan Silpachai
  • Patent number: 10598527
    Abstract: In a drilling system for drilling a borehole with drilling fluid, a flow loop communicates the drilling fluid, and a differential pressure device in the flow loop at a measurement location produces a pressure drop in flow. The measurement location can be between the borehole and a drilling choke or between a mud pump and the borehole. Piping diverts a portion of the flow at the measurement location so a flowmeter can measure the diverted flow portion. A processing unit receives a measured parameter from the flowmeter and determines a diverted flow rate of the diverted portion therefrom to correlate it to a value of the main flow rate through the flow loop at the measurement location.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: March 24, 2020
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Walter S. Dillard, Sang (Paul) Park, David J. Vieraitis
  • Patent number: 10563654
    Abstract: A pump-motor combination includes a motor (30) and a pump (20). The pump has a first rotor (21) and a first housing 300). The motor is an electric motor (30) having a second rotor (31), a stator (33) and a second housing (32). The first (pump) rotor (21) is at least partially coupled, and the second (motor) rotor (31) is completely coupled, to a common rotating shaft (40) in order to enable transmission of rotation of the second (motor) rotor (31) to the first (pump) rotor (21). The pump-motor combination can be installed with the gearbox (G) or transmission of a motor vehicle, to assure supply of lubricant (360) when a primary lubricant pump (350) has not been operating, for example, upon start-up. Use of the common shaft (40) minimizes frictional losses during operation and reduces the cost of manufacture, since fewer bearings are needed.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: February 18, 2020
    Assignee: ebm-papst St. Georgen GmbH & Co. KG
    Inventors: Tobias Ott, Alexander Hahn
  • Patent number: 10550856
    Abstract: A suction nozzle is provided for a fan with a suction opening for suctioning a fan main flow. The suction nozzle has an opening edge section adjoining the suction opening and having a local outbreak. A flow insert is detachably provided in the local outbreak of the opening edge section. The flow insert forms a bypass leading to the suction opening for a bypass flow leading to the fan main flow. Measuring means are provided in the bypass for the volume flow determination of the fan main flow. A confusor is provided in the bypass. The confusor is formed by a first web and a second web. The first web and the second web circumferentially face one another to form a nozzle channel in the bypass. The nozzle channel has a radially narrowest section. The measuring means are arranged in the radially narrowest section.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: February 4, 2020
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventors: Thomas Heli, Peter Riegler, Valerius Schaaf
  • Patent number: 10247590
    Abstract: A balancing valve for adjusting the flow rate of a fluid flowing inside a pipe from upstream to downstream in a longitudinal direction of flow. The balancing valve includes: a check valve and a tubular element simulating a Venturi tube, said valve and element being coaxially connected, respectively, from upstream to downstream in the longitudinal direction of flow of the fluid; a device for detecting the difference in pressure which occurs inside the valve; a valve for adjusting the flow rate of the fluid which flows inside the pipe; wherein: the detection device is arranged between the inside of a first upstream chamber of the check valve and the inside of a central cylindrical portion of the tubular element.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: April 2, 2019
    Assignee: WATTS INDUSTRIES ITALIA S.r.l.
    Inventor: Alfredo Marco Cucciniello
  • Patent number: 10219696
    Abstract: Continuous pressure sensing is important for patients with several different conditions. We provide an implantable sensor, based on microfluidic principles, which in one example has 1 mmHg limit of detection, high sensitivity and excellent reproducibility. This sensor has an optical interface, which enables pressure to be read with, for example, a cell phone camera. The design and fabrication, along with the option of self-monitoring are promising steps toward better patient care and treatment.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: March 5, 2019
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ismail E Araci, Stephen R Quake, Melanie Hayden Gephart
  • Patent number: 10174280
    Abstract: An apparatus, system and method providing a fluid flow suitable to grow and maintain living cells in the fluid flow are disclosed. The apparatus includes a fluid displacement apparatus capable of providing at least one of positive and negative displacement of the fluid and configured to indirectly displace the fluid, an in-line flow sensor configured to directly measure the fluid flow, and a feed-back control in communication with the fluid displacement apparatus and the in-line flow sensor, wherein the feed-back control is configured to continuously control the fluid flow in response to the flow sensor measurements.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: January 8, 2019
    Assignee: CorSolutions LLC
    Inventors: Thomas N. Corso, Colleen K. Van Pelt
  • Patent number: 10139259
    Abstract: A system for metering gas a fluid stream includes a primary conduit and a secondary conduit coupled to the primary conduit such that the secondary conduit receives a portion of a fluid stream passing through the primary conduit. A flow manager disposed in the primary conduit is configured to maintain a predetermined relationship between at least one first physical characteristic of the fluid stream and at least one second physical characteristic of the portion of the fluid stream. A sensor measures a flow characteristic of the portion of the fluid stream and a processor determines a flow parameter of the fluid stream based, at least in part, on the predetermined relationship and one of an amplitude or temporal characteristic of the electrical signal.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 27, 2018
    Assignee: General Electric Company
    Inventors: Nannan Chen, Ertugrul Berkcan, Mengli Wang, Roman Leon Artiuch
  • Patent number: 10086163
    Abstract: An airway adapter includes a housing and a pressure transducer. The housing includes a flow path having a first end and a second end, a first pressure port that communicates with the flow path, and a second pressure port that communicates with the flow path. The first pressure port is spaced apart from the second pressure port. The flow restriction is disposed in the flow path between the first and second pressure ports that creates a pressure differential therebetween. The pressure transducer generates a signal that reflects the differential pressure created by the flow restriction between the first and second pressure ports, wherein the pressure transducer includes an optical interferometer.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: October 2, 2018
    Assignee: Koninklijke Philips N.V.
    Inventor: James T. Russell
  • Patent number: 10066976
    Abstract: The design and structure of a vortex flow meter with large dynamic range utilizing a micro-machined thermal flow sensing device for simultaneously measurement of volumetric flowrate via vortex street frequency as well as mass flowrate is exhibited in this disclosure. The micro-machined thermal flow sensing device is placed at the central point of a channel inside the bluff body where the channel direction is not perpendicular to the direction of fluid flow in the conduit. The thermal flow sensing device is operating in a time-of-flight principle for acquiring the vortex street frequency such that any surface conditions of the device shall not have significant impact to the measured values. With a temperature thermistor on the same micro-machined thermal flow sensing device, the vortex flow meter shall be able to output the fluid temperature as well as the fluid pressure.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: September 4, 2018
    Assignee: Wisenstech Ltd.
    Inventors: Liji Huang, Chih-Chang Chen
  • Patent number: 10016132
    Abstract: Glaucoma is the second most common cause of blindness in the global world. It is a multifactorial disease with several risk factors, of which intraocular pressure (IOP) is the most important. IOP measurements are used for glaucoma diagnosis and patient monitoring. IOP has wide diurnal fluctuation, and is dependent on body posture, so the occasional measurements done by the eye care expert in clinic can be misleading. We provide an implantable sensor, based on microfluidic principles, which in one example has 1 mmHg limit of detection, high sensitivity and excellent reproducibility. This sensor has an optical interface, which enables IOP to be read with, for example, a cell phone camera. The design, fabrication, along with the option of self-monitoring are promising steps toward better patient care and treatment for this devastating disease.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: July 10, 2018
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Yosef Mandel, Ismail E Araci, Stephen R Quake
  • Patent number: 9784602
    Abstract: Methods and systems to measure a volumetric fluid flow rate through a fluid flow passage, such as an air handler of a HVAC system, are described. The method may include obtaining a flow rate measurement in a measuring section, and calculating a total flow rate based on a correlation between the obtained flow rate measurement and the total flow rate. The method may also include blocking a portion of the fluid flow passage so that when a minimal volumetric fluid flow rate is provided, the flow rate measurement obtained in the measuring section is at about a minimal sensitivity flow rate requirement.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: October 10, 2017
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: William G. Hansen, Lane A. Liudahl
  • Patent number: 9726530
    Abstract: An in-line flowmeter for large diameter pipes includes an outer pipe with a diameter equal to that of the pipe to which it is coupled and an inner measuring tube carrying a portion of the flow, the flow through the measuring tube being sensed by a flowmeter associated with the measuring tube and with the total combined flow rate out of the in-line flowmeter calculated from the sensed flow through the measuring tube.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: August 8, 2017
    Inventor: Jesse Yoder
  • Patent number: 9468191
    Abstract: A device for carrying out at least one measurement and for removing milk samples from a milking machine, through which milk can flow and which contains an air separation device, a measurement device, a sample removal device and a channel that is open to the top. The air separation device is designed to separate the milk from air with which the milk is mixed. The measurement device is device and is connected to the air separation device by a first milk outlet opening of the air separation device and designed to carry out one or more measurements with the milk flowing through the device. The sample removal device is designed to supply milk to a sample container.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: October 18, 2016
    Assignee: LACTOCORDER AG
    Inventor: Tilman Hoefelmayr
  • Patent number: 9404936
    Abstract: A pitot tube system having a pitot tube containing a porous hydrophobic fabric that blocks water and contaminants from reaching a pressure sensor. The distance in the pitot tube between the fabric and a front orifice of the tube is less than 2.4 times the height of the orifice, and preferably less than or equal to 0.38 times the height. The section of the tube through which the fabric extends defines an opening characterized by a minimum dimension greater than 0.15 inches, and preferably being at least 0.21 inches. The tube is a removable structure that attaches to a mount that forms a passage for communicating the pressure in the tube. That passage contains a second porous hydrophobic fabric that also blocks water and contaminants from reaching a pressure sensor.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: August 2, 2016
    Assignee: AeroVironment Inc.
    Inventor: Charles F Ashton
  • Patent number: 9170135
    Abstract: Disclosed are apparatus and methodology for measuring gas flow using a modular unit as a gas measurement module. The modular unit can be made of molded plastic, cast metal, or other material. A gas meter can include the gas measurement module. The gas measurement module includes a chamber with an inlet and an outlet. An obstacle in the chamber is configured to generate an oscillating gas jet when gas flow into the chamber is at or above a threshold flow rate. The gas measurement module includes a dual sensing assembly with one or more first sensors using a first gas flow sensing technology and one or more second sensors using a second gas flow sensing technology.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: October 27, 2015
    Assignee: ITRON, INC.
    Inventors: Ibne Soreefan, Orion Baker
  • Patent number: 9080908
    Abstract: An in-line flowmeter for large diameter pipes includes an outer pipe with a diameter equal to that of the pipe to which it is coupled and an inner measuring tube carrying a portion of the flow, the flow through the measuring tube being sensed by a flowmeter associated with the measuring tube and with the total combined flow rate out of the in-line flowmeter calculated from the sensed flow through the measuring tube.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: July 14, 2015
    Inventor: Jesse Yoder
  • Patent number: 8973435
    Abstract: A method and apparatus for measuring a resultant flow delivered by a pump coupled to an over pressure valve, the method comprising the steps of: measuring, using a first flow meter, feed flow to the pump; measuring, using a second flow meter, return flow from the over pressure valve; and calculating resultant flow, at least in part, by subtracting measured return flow from measured feed flow. A pump power modification module can further modifying the pump output pressure to enable pressure profiling.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: March 10, 2015
    Assignee: Breville Pty Limited
    Inventors: Adam Preston, Con Psarologos
  • Patent number: 8869609
    Abstract: A flow sensor for measuring the flow of a gaseous or liquid medium with a sensor housing in which, between an inlet channel and an outlet channel, a flow channel extends that comprises a main channel and a measuring channel that is arranged parallel to the main channel. At least one main channel choke point is arranged in the main channel, and the measuring channel comprises a sensor element for measuring the flow. A measuring channel choke point in the measuring channel on the inlet and/or the outlet side, is arranged with the main channel choke point having at least one passage and the measuring channel choke point having a passage, both passages being of identical shape and extending parallel to each other in the flow direction.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: October 28, 2014
    Assignee: Axetris AG
    Inventors: Thomas Wielath, Stefan B├╝rgi
  • Patent number: 8813582
    Abstract: A system for testing the efficiency of a test HEPA filter, the system comprises a dilution system and a sampling system. The dilution system processes samples collected upstream of the test HEPA filter. The dilution system has a test portion and a calibrated portion. The calibrated portion aids in determining the dilution ratio of the test portion thereby rendering the dilution system self-calibrating. The sampling system receives upstream samples via the dilution system, and downstream samples collected directly downstream of the test HEPA filter. The sampling system incorporates a flow rate balancing system to ensure accurate counts with respect to samples collected upstream and downstream of the test HEPA filter. The sampling system works well with particle counters fitted with relatively weak fans to draw in samples for counting; this is achieved by connecting the sampling system to both the inlet and exhaust outlet of a particle counter.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: August 26, 2014
    Assignee: The United States of America as Represented the Secretary of the Army
    Inventors: Derek J. Mancinho, Myat S. Win
  • Patent number: 8752424
    Abstract: A bypass passage receives a part of air flowing through a duct. A sub-bypass passage is branched from an intermediate portion of the bypass passage to separate dust contained in air flowing through the duct. A flow rate sensor is located in the sub-bypass passage for detecting the flow rate of air. A first wall surface and a second wall surface of the bypass passage are located upstream from the branch. The first wall surface is located on the side of the branch. The second wall surface is opposed to the first wall surface. Both the first wall surface and the second wall surface are curved to direct airflow to move away from the branch.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: June 17, 2014
    Assignee: Denso Corporation
    Inventors: Takao Ban, Noboru Kitahara
  • Publication number: 20140118161
    Abstract: An all-electronic utility gas meter using with micromachined (a.k.a. MEMS Micro Electro Mechanical Systems) silicon sensor to measure gas metrology data for custody transfer or tariff in city gas metering application is disclosed in the present invention. The meter has two separate metrology units. One of the units is located in the main flow channel with the insertion probing configuration while the other is configured as a bypass unit assembly with the main metrology unit. The bypass metrology unit can perform independent metrology tasks and can be exchanged onsite during service, maintenance or repair without dismantle the meter from the service pipeline. The bypass metrology unit also can be used to compare the measured data from time to time and performance self-diagnosis that shall help the performance and data authentication during the meter field service. Both of the units can be powered by battery or external sources.
    Type: Application
    Filed: October 28, 2012
    Publication date: May 1, 2014
    Applicant: M-TECH INSTRUMENT CORPORATION (HOLDING) LIMITED
    Inventors: Changming Jiang, Yong Feng, Sugang Jiang, Chih-Chang Chen, Liji Huang
  • Publication number: 20140083179
    Abstract: A plate-like flow sensor is located in a bypass passage such that a front-to-rear direction of the flow sensor is substantially along a width direction of the bypass passage. The flow sensor divides a flow from its upstream into a first flow, which passes on its front side, and a second flow, which passes on its rear side. The bypass passage has a bent portion in which the first flow and the second flow merge on a downstream side of the flow sensor. A flow deflection unit changes a turning quantity of at least one of the first flow and the second flow such that a turning quantity of the first flow and a turning quantity of the second flow are substantially conformed in the bent portion.
    Type: Application
    Filed: August 5, 2013
    Publication date: March 27, 2014
    Inventor: Noboru Kitahara
  • Patent number: 8573051
    Abstract: A flow rate measurement device has a main flow pipe having a main flow passage through which a gas passes, an orifice for limiting a flow of the gas in the main flow passage, and an auxiliary flow passage block provided with an auxiliary flow passage having one end communicating with a pair of introduction ports opened in the main flow passage on the upstream side of the orifice and the other end communicating with a pair of discharge ports opened in the main flow passage on the downstream side of the orifice. The auxiliary flow passage includes a pair of introduction flow passages having upstream ends respectively communicating with the introduction ports, an upstream auxiliary flow passage having both ends respectively connected to downstream ends of the introduction flow passages, and a pair of discharge flow passages having downstream ends respectively communicating with the discharge ports.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: November 5, 2013
    Assignee: OMRON Corporation
    Inventors: Naotsugu Ueda, Satoshi Nozoe
  • Publication number: 20130213131
    Abstract: Flow sensor assemblies having increased flow range capabilities are disclosed. In one illustrative embodiment, a flow sensor assembly includes a housing with an inlet flow port, an outlet flow port, a fluid channel extending between the inlet flow port and the outlet flow port, and a bypass channel having a pair of taps fluidly connected to the fluid channel at separate locations. A flow sensor for sensing a measure related to a flow rate of a fluid flowing through the fluid channel can positioned in the bypass channel. A pressure differential between the two taps of the bypass channel can drive a fraction of a fluid flowing through the fluid channel through the bypass channel. The flow sensor assembly may be configured to achieve, control, and/or balance a desired fraction of fluid flow through the bypass channel and past the flow sensor.
    Type: Application
    Filed: April 15, 2013
    Publication date: August 22, 2013
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: HONEYWELL INTERNATIONAL INC.
  • Publication number: 20130205892
    Abstract: A flow measurement device according to the present invention includes a main flow channel through which fluid flows, and a secondary flow channel unit where the fluid is diverted from the main flow channel, supplied to a flow amount detection element and thereafter returned to the main flow channel. The secondary flow channel unit includes a diversion flow channel through which the fluid is diverted from the main flow channel and returned to the main channel without the fluid being supplied to the flow amount detection element, and a detection channel in which the fluid is diverted from the diversion flow channel and provided to the flow amount detection element. The diversion flow channel includes a smooth flow part in which the fluid flows smoothly between the two ends connecting to the main flow channel, and a first chamber and a second chamber which, adjacent to the smooth flow part, are divided by a partition provided so as to obstruct flow of the fluid.
    Type: Application
    Filed: July 4, 2011
    Publication date: August 15, 2013
    Applicant: OMRON CORPORATION
    Inventors: Naotsugu Ueda, Katsuyuki Yamamoto, Satoshi Nozoe, Shuji Maeda, Yuji Tsukuma
  • Publication number: 20130199288
    Abstract: A fluid flow distribution device for a fluid component configured to improve a distribution of a fluid flow therein. The fluid flow distribution includes a plurality of walls. The walls form a chamber configured to receive a fluid flow from a fluid source therein. The chamber is in fluid communication with a fluid inlet of the fluid component and a plurality of flow paths. Each of the flow paths includes an inlet and an outlet. At least one of the walls includes an inner surface, wherein a distance between the inner surface and a plane generally defined by the inlets of the flow paths non-uniformly progressively decreases in respect of a general direction of the fluid flow into the fluid flow distribution device to downwardly direct the fluid flow into the flow paths adjacent thereto.
    Type: Application
    Filed: February 2, 2012
    Publication date: August 8, 2013
    Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.
    Inventor: Lakhi Nandlal Goenka
  • Publication number: 20130199289
    Abstract: There is disclosed a flow sensor arrangement, comprising a main channel (1) for conveying a fluid, a bypass (2) connected to the main channel (1) for conveying a portion of the fluid supplied in the main channel (1), and a flow sensor (6) for measuring a flow of the fluid portion in the bypass (2). The bypass (2) branches off from the main channel (1) at an angle (?) of less than 90 degrees between an inlet section (21) of the bypass (2) and a supply section (11) of the main channel (1). By such design means, particles can be prevented from entering the bypass (2) by this adversely affecting the measurements.
    Type: Application
    Filed: August 17, 2010
    Publication date: August 8, 2013
    Applicant: SENSIRION AG
    Inventors: Mark Hornung, Felix Mayer, Claudia Kuttel
  • Publication number: 20130068012
    Abstract: A method and apparatus for measuring a resultant flow delivered by a pump coupled to an over pressure valve, the method comprising the steps of: measuring, using a first flow meter, feed flow to the pump; measuring, using a second flow meter, return flow from the over pressure valve; and calculating resultant flow, at least in part, by subtracting measured return flow from measured feed flow. A pump power modification module can further modifying the pump output pressure to enable pressure profiling.
    Type: Application
    Filed: May 6, 2011
    Publication date: March 21, 2013
    Applicant: Breville Pty Limited
    Inventors: Adam Preston, Con Psarologos
  • Publication number: 20130019675
    Abstract: A bypass passage receives a part of air flowing through a duct. A sub-bypass passage is branched from an intermediate portion of the bypass passage to separate dust contained in air flowing through the duct. A flow rate sensor is located in the sub-bypass passage for detecting the flow rate of air. A first wall surface and a second wall surface of the bypass passage are located upstream from the branch. The first wall surface is located on the side of the branch. The second wall surface is opposed to the first wall surface. Both the first wall surface and the second wall surface are curved to direct airflow to move away from the branch.
    Type: Application
    Filed: June 15, 2012
    Publication date: January 24, 2013
    Applicant: DENSO CORPORATION
    Inventors: Takao Ban, Noboru Kitahara
  • Patent number: 8356623
    Abstract: In order to improve a measurement accuracy of a mass flow meter, the mass flow meter comprises a flow rate calculating section that obtains an output signal from a sensor section having a thermosensitive resistive element arranged in a flow channel where a sample gas flows and that calculates a flow rate of the sample gas, a pressure measuring section that measures a primary side pressure in the flow channel, and a flow rate correcting section that corrects the measured flow rate obtained by the flow rate calculating section by the use of the primary side pressure obtained by the pressure measuring section and a gas coefficient determined by an isobaric specific heat of the sample gas.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 22, 2013
    Assignee: Horiba STEC, Co., Ltd.
    Inventors: Yasuhiro Isobe, Osamu Horinouchi, Yuki Tanaka, Masao Yamaguchi, Yukimasa Furukawa
  • Publication number: 20120304759
    Abstract: A sensor assembly for use with a fluid transport system is provided. The sensor assembly includes at least two sensors that are configured to measure a rate of flow of a fluid channeled through a pipeline of the fluid transport system. Moreover, the sensor assembly includes an annular collar that is coupled to the two sensors. The collar includes at least a first opening and at least a second opening defined therein. The first opening and the second opening are each sized to receive the two sensors therein such that the two sensors are substantially coaxially aligned with each other. A first sensor of the two sensors is positioned downstream from a second sensor of the two sensors.
    Type: Application
    Filed: June 3, 2011
    Publication date: December 6, 2012
    Inventors: Solomon Feldman, Toan Huu Nguyen
  • Publication number: 20120192641
    Abstract: Techniques for determining one or more fluid flow characteristic values of a structure are disclosed. A fluid flow vector and a pressure gradient vector for a portion of the structure are determined, and a dot/cross product of the fluid flow vector with the pressure gradient vector is obtained to provide a fluid flow characteristic value. The fluid flow characteristic value can be used for modifying the structure to improve fluid flow through the structure.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventors: Robin BORNOFF, Byron Blackmore, John Parry
  • Patent number: 8181513
    Abstract: A flow meter includes: a body portion comprising a main flow path wherein flows a fluid to be measured, a first branch flow portion wherein the fluid to be measured branches and flows from the main flow path, a second branch flow portion wherein the fluid to be measured, which branches and flows from the first branch flow portion, flows into the main flow path, and narrow portions for restricting the flow of the fluid to be measured, provided in a primary flow path between the branch flow portions, a branched flow path structuring portion through which flows the fluid to be measured, connected to the branch flow portions; and a fluid measuring portion provided with a sensor disposed facing a flow path that is provided in the branched flow path structuring portion, wherein the sensor measures the fluid based on the detection results of the fluid introduced from the branch flow portions.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: May 22, 2012
    Assignee: Azbil Corporation
    Inventors: Masanori Anzai, Masaki Seo, Junichi Matsuda, Manabu Muraoka
  • Publication number: 20110146397
    Abstract: A flow rate measurement device has a main flow pipe having a main flow passage through which a gas passes, an orifice for limiting a flow of the gas in the main flow passage, and an auxiliary flow passage block provided with an auxiliary flow passage having one end communicating with a pair of introduction ports opened in the main flow passage on the upstream side of the orifice and the other end communicating with a pair of discharge ports opened in the main flow passage on the downstream side of the orifice. The auxiliary flow passage includes a pair of introduction flow passages having upstream ends respectively communicating with the introduction ports, an upstream auxiliary flow passage having both ends respectively connected to downstream ends of the introduction flow passages, and a pair of discharge flow passages having downstream ends respectively communicating with the discharge ports.
    Type: Application
    Filed: August 3, 2009
    Publication date: June 23, 2011
    Applicant: OMRON CORPORATION
    Inventors: Naotsugu Ueda, Satoshi Nozoe
  • Patent number: 7891239
    Abstract: To provide a flow meter, and a flow volume controlling device equipped therewith, capable of reducing pressure loss while obtaining a flow rectifying effect in a measurement fluid. A flow meter for measuring the flow volume of a measurement fluid, equipped with a flow path wherein the measuring fluid flows, and a flow rectifier that is disposed within the flow path, where the flow rectifier has holes for rectifying the flow of a measurement fluid, and has an area that is wider than the flow path cross-sectional area in a direction that is perpendicular to the direction in which the flow path extends. The flow volume controlling device is provided with the flow meter, a controlling valve, and controlling means for adjusting the flow volume of a fluid that flows through the flow path of the flow meter through controlling the controlling valves based on information regarding the flow volume detected by the flow meter.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: February 22, 2011
    Assignee: Yamatake Corporation
    Inventors: Hiroyuki Inagaki, Shigeru Aoshima, Takeshi Watanabe
  • Patent number: 7886592
    Abstract: A flow sensor includes a detector provided on a side surface of a body formed in a tubular shape. First and second passages formed in the interior of the body communicate with an introduction passage of the detector via first and second sensor passages. The first and second sensor passages penetrate through and open respectively on first and second projections, which project at predetermined heights from an inner circumferential surface of the body, communicating with the first and second passages. A fluid, which flows from the first passage and into the first sensor passage, after being guided to the introduction passage and the flow rate thereof detected by a detector, flows through the second sensor passage and into the second passage.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: February 15, 2011
    Assignee: SMC Kabushiki Kaisha
    Inventors: Hideki Uchiyama, Ken Gunji, Yuta Oshima, Hironori Sakaguchi
  • Patent number: 7874208
    Abstract: An improved flow measuring device, such as a mass flow meter or mass flow controller, providing a high turn-down ratio as compared to prior art devices. In accordance with various embodiments of the invention, a flow sensor includes a sensor flow path that includes one or more restrictions configured to provide the sensor flow path with a non-linear relationship between a pressure drop across the sensor flow path and the flow of fluid through the flow sensor conduit. Such a flow sensor preferably achieves a high turn-down ratio by way of a variable bypass ratio that is directly proportional to the sensor tube mass flow rate so that the turn-down ratio of the mass flow controller will be ideally proportional to the square of the turndown achievable by the flow sensor conduit fluid sensing portion alone. In some embodiments, the restriction can be employed as a part of a fluid seal having an orifice and disposed between a flow sensor portion of a flow meter and a bypass portion of the flow meter.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: January 25, 2011
    Assignee: Brooks Instrument, LLC
    Inventors: Eric J. Redemann, Chiun Wang, Thomas Owen Maginnis
  • Publication number: 20100175468
    Abstract: A flow meter includes: a body portion comprising a main flow path wherein flows a fluid to be measured, a first branch flow portion wherein the fluid to be measured branches and flows from the main flow path, a second branch flow portion wherein the fluid to be measured, which branches and flows from the first branch flow portion, flows into the main flow path, and narrow portions for restricting the flow of the fluid to be measured, provided in a primary flow path between the branch flow portions, a branched flow path structuring portion through which flows the fluid to be measured, connected to the branch flow portions; and a fluid measuring portion provided with a sensor disposed facing a flow path that is provided in the branched flow path structuring portion, wherein the sensor measures the fluid based on the detection results of the fluid introduced from the branch flow portions.
    Type: Application
    Filed: May 19, 2008
    Publication date: July 15, 2010
    Applicant: YAMATAKE CORPORATION
    Inventors: Masanori Anzai, Masaki Seo, Junichi Matsuda, Manabu Muraoka
  • Publication number: 20100030388
    Abstract: A system and method of characterizing or controlling a flow of a fluid is provided that involves a sensor conduit and a bypass. A plurality of fluids may be utilized in the flow control device based on characteristic information of the device generated during calibration thereof. The characteristic information, in turn is based on a dimensionless parameters, such as adjusted dynamic pressure and adjusted Reynolds number.
    Type: Application
    Filed: October 13, 2009
    Publication date: February 4, 2010
    Inventors: Chiun Wang, John M. Lull, William S. Valentine
  • Patent number: 7637152
    Abstract: Provided are a flow meter and a flow-rate control system using the same that is capable of measuring a flow rate in a minute flow-rate region with excellent measurement accuracy by preventing or suppressing the generation of bubbles and in which accumulation of the fluid and the bubbles is less likely to occur.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: December 29, 2009
    Assignee: Surpass Industry Co., Ltd.
    Inventors: Yoshihiro Ushigusa, Hiroki Igarashi, Masahiro Hasunuma
  • Patent number: 7607362
    Abstract: The present invention relates to a flowmeter for measuring flow rate of a fluid independently of fluid viscosity or density. In at least on embodiment, the flowmeter includes an inlet, an outlet, and a cylindrical chamber. The flowmeter also includes an impeller assembly positioned within a cylindrical chamber for rotation at a variable speed. In at least one embodiment, the flow rate of the fluid is determined when a pressure differential between the fluid in the let and fluid in the outlet becomes substantially zero.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: October 27, 2009
    Assignee: Ford Motor Company
    Inventor: Ronald David Brost
  • Patent number: 7574908
    Abstract: A secondary flow channel of a flow rate measuring device includes: a guide flow channel in which an upstream side communicates with a guide port serving as a first bifurcation point, and a downstream side serves as a second bifurcation point; a first secondary flow channel in which an upstream side is bifurcated from a guide flow channel at the second bifurcation point and formed to be parallel to a primary flow channel, and a downstream side communicates with a discharge port; a second secondary flow channel in which an upstream side is bifurcated from the guide flow channel at the second bifurcation point and formed to cross the primary flow channel; and a detection flow channel in which an upstream side communicates with a downstream side of the second secondary flow channel, a flow rate detecting element is disposed, and a downstream side communicates with the discharge port.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: August 18, 2009
    Assignee: OMRON Corporation
    Inventors: Naotsugu Ueda, Satoshi Nozoe, Yasushi Shimomoto
  • Publication number: 20090095068
    Abstract: An improved flow measuring device, such as a mass flow meter or mass flow controller, providing a high turn-down ratio as compared to prior art devices. In accordance with various embodiments of the invention, a flow sensor includes a sensor flow path that includes one or more restrictions configured to provide the sensor flow path with a non-linear relationship between a pressure drop across the sensor flow path and the flow of fluid through the flow sensor conduit. Such a flow sensor preferably achieves a high turn-down ratio by way of a variable bypass ratio that is directly proportional to the sensor tube mass flow rate so that the turn-down ratio of the mass flow controller will be ideally proportional to the square of the turndown achievable by the flow sensor conduit fluid sensing portion alone. In some embodiments, the restriction can be employed as a part of a fluid seal having an orifice and disposed between a flow sensor portion of a flow meter and a bypass portion of the flow meter.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 16, 2009
    Applicant: CELERITY, INC.
    Inventors: Eric J. Redemann, Chiun Wang, Thomas Owen Maginnis
  • Patent number: 7516658
    Abstract: A transmitter senses flow or pressure of a process fluid in a process pipe. The process pipe may include a flow restrictor positioned therein that carries a primary flow of a process fluid. Impulse piping is configured to carry a secondary flow of the process fluid from an upstream side of the flow restrictor to a downstream side. An electro-kinetic element is positioned within the impulse piping and is configured to generate an electro-kinetic potential related to the primary flow. Measurement circuitry in the transmitter is configured to measure the electro-kinetic potential across the electro-kinetic element and relate the electro-kinetic potential to the flow of process fluid through the process pipe.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: April 14, 2009
    Assignee: Rosemount Inc.
    Inventor: William T. Anderson
  • Patent number: 7509855
    Abstract: Sensor manifolds include a housing having at least two fluid flow passages communicating with fluid entry and exit ports in the housing that are connectable in line in a full flow fluid line in a system. One or more sensor ports in the housing communicate with one or more of the flow passages for housing one or more sensors for sensing one or more characteristics, qualities or conditions of the fluid flowing through the housing without subjecting the sensor to the full fluid flow through the housing.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: March 31, 2009
    Assignee: The Lubrizol Corporation
    Inventor: Gary A. Garvin
  • Publication number: 20090078039
    Abstract: A secondary flow channel of a flow rate measuring device includes: a guide flow channel in which an upstream side communicates with a guide port serving as a first bifurcation point, and a downstream side serves as a second bifurcation point; a first secondary flow channel in which an upstream side is bifurcated from a guide flow channel at the second bifurcation point and formed to be parallel to a primary flow channel, and a downstream side communicates with a discharge port; a second secondary flow channel in which an upstream side is bifurcated from the guide flow channel at the second bifurcation point and formed to cross the primary flow channel; and a detection flow channel in which an upstream side communicates with a downstream side of the second secondary flow channel, a flow rate detecting element is disposed, and a downstream side communicates with the discharge port.
    Type: Application
    Filed: April 19, 2006
    Publication date: March 26, 2009
    Applicant: OMRON CORPORATION
    Inventors: Naotsugu Ueda, Satoshi Nozoe, Yasushi Shimomoto
  • Publication number: 20090044619
    Abstract: The invention generally relates to combining a plurality of flow streams. In various embodiments, a first channel transports a first laminar fluid flow, a second channel transports a second laminar fluid flow, and the first and second channels enter a merging region at an acute angle to one another along separate substantially parallel planes.
    Type: Application
    Filed: March 6, 2008
    Publication date: February 19, 2009
    Inventors: Jason O. Fiering, Mathew Varghese
  • Publication number: 20090025472
    Abstract: Sensor manifolds include a housing having at least two fluid flow passages communicating with fluid entry and exit ports in the housing that are connectable in line in a full flow fluid line in a system. One or more sensor ports in the housing communicate with one or more of the flow passages for housing one or more sensors for sensing one or more characteristics, qualities or conditions of the fluid flowing through the housing without subjecting the sensor to the full fluid flow through the housing.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Applicant: The Lubrizol Corporation
    Inventor: Gary A. Garvin