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7297280 |
Method and apparatus to measure blood flow in hemodialysis shunts
The measurement of blood flow in a dialysis shunt is obtained by injection of an indicator material into a venous line leading from dialysis equipment to the shunt. The blood flow in an arterial...
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7275447 |
Method and apparatus to determine an initial flow rate in a conduit
A method and apparatus for determining an initial flow rate in a conduit is disclosed. A known change is made to the flow to be measured, resulting changes (or values corresponding to these...
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7265832 |
Optical flow meter for measuring gases and liquids in pipelines
An optical system design for measuring the velocity of fluids flowing through pipes or other conduits is disclosed. The optical system is comprised of a means for delivering two beams through a...
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7040144 |
Microfluidic viscometer
Microfluidic devices, systems, and methods measure viscosity, flow times, and/or pressures, other flow characteristics within the channels, and the measured flow characteristics can be used to...
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7013739 |
System and method for confining an object to a region of fluid flow having a stagnation point
A device for confining an object to a region proximate to a fluid flow stagnation point includes one or more inlets for carrying the fluid into the region, one or more outlets for carrying the...
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6943690 |
Flow verification mechanism
A flow verification sensor apparatus ( 30 ) is used with a constant volume pump ( 11 ) that pumps a liquid product ( 13 ) from a container ( 12 ). A plummet ( 32 ) is positioned in a flow tube ( 31...
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6938495 |
Method of measuring fluid flow
In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from...
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6926838 |
Method to measure blood flow and recirculation in hemodialysis shunts
The measurement of blood flow in a dialysis shunt is obtained by injection of an indicator material into a venous line leading from dialysis equipment to the shunt. The blood flow in an arterial...
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6869425 |
Temperature compensation system for regulating flow through tubing in a pump
A peristaltic pump is provided with a housing, a pump head in the housing, and a receiving path defined along a housing and pump head for receiving tubing. Two spaced-apart temperature sensors are...
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6766699 |
System for measuring residence time for a particulate containing food product
A method of generating a residence time measurement of a particulate-containing food product while passing the product as a continuous stream through a thermal processing apparatus is described....
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6672172 |
Triggered flow measurement
When a bolus dose of cold saline is injected into a catheter where a wire, carrying a sensor unit and electrical leads for signal transmission, is located, the lead resistance is affected by the...
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6668663 |
Method and apparatus to determine flow rate with the introduction of ambient air
A method of determining a rate of flow of a first gas in a pipe includes placing a flow-restricting device in the pipe such that the device and/or the pipe define a first channel section and a...
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6393925 |
Groundwater velocity probe
A groundwater velocity probe is provided comprising a surface with a first portion and a second portion, an injector for injecting a tracer proximate the first portion, a detector for detecting the...
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6276217 |
Method of measuring fluid flow by analyzing the fluorescent emissions of tracer particles in the fluid
In the method for measuring the velocity of fluid or visualizing the distribution of fluid by feeding tracer particles to the fluid, irradiating the fluid with light and observing return light from...
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6216543 |
Method and device for controlling liquid fluxes in pipes lines
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6210591 |
Method to measure blood flow rate in hemodialysis shunts
The invention provides a method of determining a shunt flow and particularly for hemodialysis shunts. The method includes determining a shunt flow in a shunt connected between a first point and a...
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6089103 |
Method of flow measurements
A system and method for measuring flow of a fluid flowing in a narrow channel. A sensor is provided, having an element sensitive to pressure, and an element sensitive to a selected chemical or...
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6009760 |
Method of measuring flow, and flow meter
A flow meter for measuring the flow in a dielectric pipe is disclosed. Two microwave signals are transmitted at measurement points via at least two transmitter antennae through the dielectric pipe...
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5932813 |
Method and system for residence time measurement of simulated food particles in continuous thermal food processing and simulated food particles for use in same
A method of generating a residence time measurement of a particulate-containing food product while passing the product as a continuous stream through a thermal processing apparatus is described....
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5880375 |
Apparatus and method for measuring multi-phase flow
This invention is related to the measurement of flow rates and component fractions of individual phases of a composite fluid. More particularly, the invention is directed toward apparatus and...
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5864392 |
Method for optically detecting gas bubbles moving in a coolant
For optical detection of the velocity of gas bubbles in the cooling liquid of an internal combustion engine, light is radiated into the coolant by means of at least one emitter, and the scattered...
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5828712 |
Coolant water flow rate test with rubidium nuclear tracer for reactors
Fluid flow rates are determined with a nonradioactive tracer agent in the operation of a water cooled nuclear fission reactor employed for driving electrical power generators. The technique is...
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5792963 |
Method for determining gas mass flows by use of a tracer gas
In the case of the method for determining the total mass flow of a gas mixture (2) which flows through a line (1) under pressure, a gas contained in the gas mixture is used as tracer (3). With the...
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5741979 |
Particle velocity measuring system
Method and apparatus are provided for determining the velocity of individual food particles within a liquid/solid food mixture that is cooked by an aseptic cooking method whereby the food mixture...
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5708495 |
Method and apparatus for determining the velocity of a gas flow
A method and apparatus for measuring the velocity of a gas flow that does not require the seeding of the flow is disclosed. The method and apparatus produce a population of stable molecules within...
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5691483 |
Method and apparatus for determining a real velocity distribution of solid particles travelling in a gas carrier flow for shot peening
The velocity distribution of a solid particle travelling in a carrier flow, such as a flow of peening shot or balls, is measured by first passing the solid particles or balls forming the shot...
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5646354 |
Microwave thermal trace flowmeter
A flowmeter is based on the principle of injecting a pulse of microwave radiation into a flowing stream of material containing a substance having an absorption band for the radiation so as to heat...
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5594179 |
Tracer type flowmeter and method using two or more injected trace materials
An improved flowmeter apparatus and method for accurately determining the liquid flow rate in a conduit and the mass flow rate of selected pollutant components entrained in the flow stream...
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5447692 |
On-line process flow and reaction monitor
The present invention makes use of a single detector to monitor several process functions, e.g. reaction efficiency, reagent flow rates, the presence of empty reagent reservoirs, the absence of a...
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5355735 |
Apparatus for metering liquid flow
An apparatus for measuring the flow of a liquid through a conduit by observing the transit of an injected gas bubble through the conduit. A gas source, responsive to the pressure of the liquid in...
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5265477 |
Detection device for detecting the flow and direction of ground water
Flow characteristics of a fluid are determined by introducing an electrolytic pulse at a highly localized point within the fluid without disturbing the flow field of the fluid or the form of the...
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5261282 |
Method and apparatus for monitoring a continuous cooking process based on particulate residence time
A method and apparatus for monitoring the residence time of food particles in a continuous flow process utilizing simulated food particles, each including a transponder having a predetermined...
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RE34265 |
Groundwater azimuth detection
An apparatus detects the azimuth of the migration of groundwater containing suspended microscopic particles. The apparatus comprises a probe consisting of a light source which emits light in a...
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5209114 |
Reciprocating piston flow meter
A reciprocating piston flow meter for measuring gas flow through the flow meter comprising a hollow precision bore flowtube in a vertical orientation, with a movable piston containing a valve...
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5182939 |
Method for determination of average downhole steam quality by measuring the slip ratio between the vapor and liquid phases of steam
The quality of steam downhole is determined by injecting into the steam first and second tracers, each tracer having an affinity to a single of the two phases, and then sensing the passage of the...
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5170438 |
Method and apparatus for determining the flow rate of a viscous fluid stream
A method of determining the flow rate of a viscous fluid stream comprises passing the fluid stream through a field of view of an electronic imaging device, which produces output signals...
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5153665 |
Vaporizing particle velocimeter
A velocimeter measures flow characteristics of a flow travelling through a chamber in a given direction. Tracer particles are entrained in the flow and a source of radiant energy produces an output...
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5141324 |
Visual monitoring device for sludge conditioning system
The visual monitoring apparatus includes a transparent tube section with coupling flanges at each end for coupling to adjacent conduit sections carrying a stream of conditioned sludge which...
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5127264 |
Methods of infrared visualization of air flow
An infrared visualized air turbulence method in which helium is mixed with a heavier-than-air tracer gas such as nitrous oxide in order to cause the density of the tracer gas to be approximately...
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5072853 |
Apparatus and technique for setting brix in a soft drink dispenser
A soft drink dispenser is provided with a first electrical probe within the syrup dispensing line, and a second electrical probe a fixed distance below the dispensing head. Upon actuation of the...
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5064603 |
Hydroball string sensing system
A hydroball string sensing system for a nuclear reactor that includes stainless tubes positioned to guide hydroball strings into and out of the nuclear reactor core. A sensor such as an ultrasonic...
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5054913 |
Method and apparatus for measuring the velocity of a fluid using analysis of Young's fringes in speckle photography
A method and apparatus for measuring the velocity of a fluid in which a double-exposure image of the speckle pattern or particle images of tracer particle in a fluid is irradiated with a collimated...
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5040422 |
Procedure for flow measurement and equipment therefor
A process and apparatus for flow measurement in which a marker volume is generated by the application of an electric voltage. This marker volume runs through a measured length in the direction of...
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5022274 |
High temperature particle velocity meter and associated method
The high temperature particle velocity meter is comprised of a pair of spaced apart conducting portions having disposed on each of their upstream edges a first and second non-conducting portion....
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5004538 |
Control arrangement for the chromatography of liquid
A control arrangement for a liquid chromatograph is disclosed which generates a correction factor to compensate for non-uniform passage of eluate past the detector of the chromatograph. A flow...
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4995268 |
Method and apparatus for determining a rate of flow of blood for an extracorporeal blood therapy instrument
Method and apparatus for determining the flow rate of blood passing between a patient and an extracorporeal therapy instrument. The flow measurement apparatus includes a delivery unit for producing...
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4993365 |
Flow rate meter and automatic animal feeder installation employing such flow meter
A double flow rate meter (1) and an apparatus for automatically feeding animals with liquid food which utilizes the flow meter (1) for establishing the amount of food consumed is disclosed. The...
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4972704 |
Method for troubleshooting gas-lift wells
A method is provided for troubleshooting gas-lift wells, to identify whether gas-lift valves on the production tubing are open or closed, without the use of wireline tools. The method may also be...
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4925296 |
Method of, and apparatus for measuring the flow velocity in wind tunnels
A method of measuring the flow velocity in wind tunnels is indicated, in which a path covered by particles located in a flow is employed as a measure of the flow velocity. In a pre-determined time...
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4914955 |
Soapfilm flowmeter device for measuring gas flow rates
A device for measuring rates of gases over a wide range of absolute pressures is provided which comprises a soapfilm generating chamber having a magnetically actuated, slidable cup which is used to...
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