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5207227 |
Multiprobes with thermal diffusion flow monitor
A single probe with thermal diffusion flow monitor (hereinafter known as "SPTDFM") that has improved reliability, smaller overall size, simpler method of sensor positioning, better compatibility...
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5199116 |
High-efficiency portable spa
A high-efficiency portable spa is provided for therapeutic and recreational use which includes a tub, a flow generator for circulating water in the tub, and a two-section insulating cover. A heat...
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5193399 |
Vortex flowmeter
A vortex flowmeter wherein a main body and a fitting plate with a by-pass are integrally formed with each other and the fitting plate placed an an outlet of a passage of small diameter and of a...
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5174299 |
Thermocouple-based blood flow sensor
A thermocouple-based cardiac blood flow sensor for allowing discrimination between physiologic rhythms and pathologic rhythms of the heart. The sensor is built on a cardiac catheter or lead from a...
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5127173 |
Volumetric fluid flowmeter and method
A volumetric fluid flowmeter and method utilizes a venturi nozzle in the flow being measured, along with a negative feedback fluidic oscillator driven by a small bypass flow diverted from the main...
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5123288 |
Averaging pitot probe
To measure speed of gas flow along a pipe a flowmeter is used comprising a gas flow sensor connected by tubing with an averaging pitot probe formed by first and second tubes of circular...
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5099881 |
Flow dividing structure of mass flow controller
A flow dividing structure for a mass flow controller includes a base having a main passage which includes an upsream circular passage, a downstream circular passage, and a tapering circular passage...
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5062442 |
Apparatus for monitoring a fluid conduit system for leakage points
The apparatus functions for monitoring small leakages in order to activate an alarm in the event that there has been more than a predetermined volume of small leakage through the water taps or...
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5044199 |
Flowmeter
A flowmeter has an elongated housing with a fluid inlet, a fluid outlet and an axial passage therebetween. The fluid passage contains a flow splitter section and is connected to a flow sensor...
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5038608 |
Method for measuring the flow rate of exhaust gas
In a method of measuring the flow rate of an exhaust gas, an external atmosphere is caused to flow into a pipe which branches off from the main pipe to open at the other end onto the external...
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4982602 |
Air metering device
An air flow meter that includes a filter or flow rectifier disposed in a retaining aperture of a collar in a bypass channel such that a second end face of the filter rests against one end of a...
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4981035 |
Dust defelector for silicon mass airflow sensor
The silicon sensing element of a mass airflow sensor is shielded from direct impact by large dust particles by means of a plastic deflector that is disposed in spaced upstream relationship to the...
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4961344 |
Multiple tube flowmeter
A gas flow measuring appartaus especially useful in a spirometer produces increased gas flow sensitivity and accurate gas flow rate measurements, especially at low gas flow rates. The apparatus...
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4959990 |
Combined mass flow/pitot tube meter
A mass flow meter probe having an upstream tube and a downstream tube that extends into a main gas flow conduit is disclosed. The sensor for the mass flow measurement is located in the bore of a...
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4949578 |
Flow metering of high temperature gases
A flow meter capable of performing within gas flows exhibiting temperatures above about 600° F. includes a thermally-stable housing formed of fire brick or the like through which a passageway is...
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4942763 |
Flow sensor assembly
A flow sensor assembly particularly suited for measuring localized flow components within a region of flow which may exhibit flow components of varying velocity vector in both intensities and...
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4938053 |
Fluid metering system
A fluid metering system includes a metering unit having a main flow channel and a bypass channel through which a portion of the total fluid flow through the unit is diverted, the bypass channel...
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4920808 |
Device and method for measuring the flow velocity of a free flow in three dimensions
A device for and method of measuring the flow velocity of a free fluid flow in three dimensions is provided in which a rotationally symmetrical flow body has at least two sets of peripherally...
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4916948 |
Thermal flow sensor
A thermal flow sensor has a housing through the inside of which a fluid is allowed to flow, and a supporting pipe passage disposed within and substantially in the center of the housing. A plurality...
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4914947 |
Sampling probe flow sensor
A mass air flow sensor having a probe body defining a first arcuate passageway connecting a flow entrance opening aligned with an axis and a flow exit opening offset from the axis so that...
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4912973 |
Multiple point velocity probe
A device for measuring the velocity of a fluid such as gas or air, traveling through a duct, which device relies upon a series of precisely controlled apertures for gathering a plurality of fluid...
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4911008 |
Hot film anemometer
An anemometer comprising: orifice plate adapted to be disposed within a flow stream, including an orifice; a thin film bridge, spaced from and disposed downstream of the orifice plate for directing...
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4911007 |
Flowmeter
A fluidic oscillator for a shunt flowmeter for measuring gas flow through a pipeline, comprises three sections arranged in series and providing a generally U-shaped flow path through the...
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4884459 |
Flow rate converter
A flow rate converter has a body with a cyclindric tube and an inlet and an outlet diffuser. The tube and body have inner annular conduits connecting with pipe connections disposed in the body. The...
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4879898 |
Apparatus for shielding and protecting an air flow rate meter disposed in the intake tube of an internal combustion engine from air column fluctuations
An apparatus for shielding and protecting an air flow rate meter from air column fluctuations arising in an intake tube from the aspirating action of an internal combustion engine is proposed. An...
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4875932 |
Apparatus for measuring a flow rate
An apparatus for measuring a flow rate of a fluid such as a gas, having a by-pass passage, a measurement passage, a cantilever-shaped pressure-receiving plate in the measurement passage and a...
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4858647 |
Attitude-insensitive, by-pass sensor
Disclosed is a valve having a body having an inlet channel, an outlet channel in fluid communication with the inlet channel, and a flow-monitoring region situated medially between the inlet and...
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4856328 |
Sampling probe flow sensor
A mass air flow sensor having a tubular probe body located within and aligned with a venturi passageway. The probe body has a channel therethrough connecting openings located at high and low...
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4839038 |
Fluid strainer and flow corrector for fluid measurement device
A fluid strainer and flow corrector for use with a fluid flow measurement device, such as a turbine-type flow meter, consists of a generally conical grid of ribs attached to an annular base flange....
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4831875 |
Water trap valve for fail safe operation of an air inleakage monitoring system in a steam turbine
Fail-safe bypass monitoring system for measuring volumetric flow rates in a pipe which normally carries a relatively low pressure, low volume gas flow. The system comprises a water trap valve...
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4825706 |
Flowmeter for a moving packed bed
An apparatus and method for measuring the flow of a packed bed of particles moving in a primary stream comprises positioning a feedpipe having an open end facing downstream in the primary stream...
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4825704 |
Fluid flow speed measuring apparatus
A fluid flow speed measuring apparatus comprising a first pipe having an opening exposed into a fluid to be measured, a direction of the opening having an angle larger than a critical negative...
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4805452 |
Device for the thermal measurement of the mass flow gases and liquids
A device for the measurement of the mass flows of gases and liquids in pipelines by means of an anemometer arrangement, comprising electrical resistors. The temperature dependent measuring and...
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4800754 |
Wide-range, adjustable flowmeter
A fluid bypass type flowmeter has a main passage which is configurable to various effective diameters by selectably adding pre-defined additional cross-sections comprised of an adjustable laminar...
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4776214 |
Mass air flow sensor
Several embodiments for mass airflow sensors are illustrated herein. In each case a sensing element (11) for the mass airflow sensor (10, 34, 50) is provided on a first portion (18) of a thin...
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4776213 |
Mass airflow meter
A mass airflow meter for positioning within a duct wherein a fluid flows, particularly an air intake of an internal combustion engine, includes a symmetrical body having an axial passageway and a...
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4764758 |
Incipient fire detector II
An improved incipient fire detector that employs a sub-micrometer size particle detector of the Wilson cloud chamber type in conjunction with a continuous on-the-fly sequential selector valve...
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4723443 |
Intake air flow sensor
An intake air flow sensor comprises a sensor main body and a connection unit main body, the former consisting of a main passage for passing intake air and a bypass passage for bypassing part of the...
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4709581 |
Air flow meter
An air flow meter including an air flow rate measuring tube located in a main air passageway and having an air inlet portion and an air outlet portion of a bypass passageway formed therein. The air...
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4672997 |
Modular, self-diagnostic mass-flow controller and system
A modular, self-diagnostic mass-flow controller and system includes separable and readily interchangeable housing portions cooperative to provide mass-flow controller component repair and...
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4648270 |
Mass flowmeter
A mass flowmeter uses a transducer comprised of a small block of insulating material. The transducer has a bypass channel and a detector channel passing through it. The bypass channel is used to...
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4608864 |
Device for sampling and measuring the flow rate of a continuously or intermittently circulating liquid
A device for sampling and measuring the flow rate of a continuously or intermittently circulating liquid, more particularly a foaming liquid, such as milk, comprises means for taking a sample of...
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4602514 |
Device for measuring the volume flow of a gas in a duct
A device for measuring the volume flow of a gas in a duct for making it possible to effect adjustment or balancing at the manufacturer's location and then being installable in a duct at any desired...
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4598583 |
Metering cell
A meter comprising a receptacle and cover structured to receive, respectively, a metering component and a registering component and provided with forcibly interengageable internally non-accessible...
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4592326 |
Fuel injection apparatus
A fuel injection apparatus is disclosed which includes two intake tubes each having a throttle valve, a fuel injection valve for injecting fuel into each of the intake tubes, a hot-wire type air...
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4590790 |
Method for determining the accuracy of a gas measurement instrument
A meter in a high pressure gas pipeline is calibrating using a sonic nozzle in series with the meter. A bypass line is run where measurements are made to determine gas composition dependent factors...
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4574630 |
Sampler for a milking-system volumeter
A sampler for a milking-system volumeter that can measure fractional volumes and that has both a partial-vacuumized separation chamber with an outlet that can be closed off by means of a valve...
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4571996 |
Air flow sensor
An air flow sensor (10) as may be used to measure input air to an internal combustion engine has an aerodynamically designed impact tube (16) for diverting bypass air to a pair of sensors (28, 30)....
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4565092 |
Flow sensor with adjustable sensitivity
A flow sensor having adjustable sensitivity includes a differential pressure sensing element located in an internal compartment within a rotatable cylinder. The compartment is connected between...
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4561302 |
Air flow rate meter
An air flow rate meter for ascertaining the mass of the air flowing through an intake tube of an internal combustion engine. The air flow rate meter includes a temperature-dependent measuring...
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