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7290441 |
Micro slit viscometer with monolithically integrated pressure sensors
An improved micro slit viscometer includes a combined micrometer depth rectangular slit flow channel with monolithically integrated multiple pressure sensors in the flow channels and a pumping...
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7237431 |
Apparatus and method for measuring viscosity
An apparatus and methods for analysis of a petroleum product, specifically determining the viscosity of a sample, are disclose. The apparatus includes a sample reservoir for receiving a liquid...
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7213439 |
Automatic bridge balancing means and method for a capillary bridge viscometer
A thermally controlled stage is connected within one arm of a bridge of a capillary bridge viscometer so that the bridge can be balanced in situ to provide accurate measurement signals. The...
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7188515 |
Nanoliter viscometer for analyzing blood plasma and other liquid samples
A microfabricated, a nanoliter capillary viscometer includes a first channel that is defined by a first channel-defining surface in a first substrate and a second channel defining surface in a...
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7159602 |
Flow-measuring valve device and method
A flow measuring valve device ( 1 ) for fluid, the flow measuring valve ( 1 ) comprising a first restriction ( 48 ) and a second restriction ( 76 ) connected in series with the first restriction (...
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6877361 |
Viscosimeter
A viscosimeter for measuring the viscosity of a solution in a solvent includes flow resistances having the smallest possible thickness and a small volume compared with all other parallel and...
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6840092 |
Method and apparatus for rheometry, and its application to control of polymer manufacture
A method and apparatus for studying the properties of a fluid are provided in which in which a rheometer is used to obtain, for example, value(s) indicative of the shear stress in the fluid to...
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6584830 |
Viscosity measuring apparatus
Apparatus for measuring the viscosity of a Newtonian fluid, includes a tubular housing which defines an internal cavity; a fluid restriction structure disposed in a first portion of the cavity; and...
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6578409 |
Method and device for determining the threshold of heavy fraction deposit contained in a liquid hydrocarbon fluid
The invention concerns a method whereby a fluid sample is brought ( 1 ) at constant pressure Pe and temperature maintaining the heavy fractions, in particular asphaltenes, in dissolved state and/or...
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6575019 |
Reciprocating drive/pump system and reciprocating capillary viscometer utilizing same
A reciprocating pump and a capillary viscometer utilizing the same. Preferably, the inventive reciprocating pump is a syringe pump comprising: a cylinder, an actuated piston, and a floating piston....
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6561011 |
Apparatus and method for measuring the viscosity of plastic materials
In an apparatus for measuring the viscosity of plastic materials including a heatable housing structure, enclosing a controllable material pump for generating a certain material flow, a plurality...
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6495075 |
Process for preparing polyketone fibres
The invention pertains to a process for preparing thermoplastic fibres by melt-spinning an alternating co-polymer composed of alkenes and carbon monoxide in which the polymer is heated to a...
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6412337 |
Apparatus and method for measuring the rheological properties of a power law fluid
The apparatus ( 10 ) is used for determining the consistency index (k) and the power law index (n) of a Newtonian fluid or non-Newtonian power law fluid. A method is also disclosed. Accordingly,...
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6237398 |
System and method for monitoring pressure, flow and constriction parameters of plumbing and blood vessels
The present invention provides a system and method of quantifying flow, detecting a location of an obstruction and quantifying a degree of the obstruction in a pipe characterized in pulsatile flow....
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6023962 |
Reservoir-slit rheometer for the viscosity measurement of fast-reacting polymers
A viscometer measures the rheological properties of polymers over a wide range of temperature, shear-rate and cure conditions, so that it can be used with extremely fast-changing resinous materials...
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5979229 |
Process and apparatus for determining the viscosity of microliter samples
A process for determining the viscosity of liquids on a microliter scale, wherein first the difference (a) in the pressure drop in a reference liquid flowing in a constant volume flow through a...
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5847268 |
Viscosity measuring apparatus and method
A forced flow viscosity measuring apparatus includes within a housing (13), a thermostatic air chamber (11), a measurement capillary (38) and a needle (60) in fluid communication with the capillary...
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5583284 |
Method for monitoring grease consistency
The invention relates to continuous grease making processes. The invention further relates a method for monitoring the consistency of the final product stream of a continuous grease making process....
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5537860 |
Fluid sensor including substantially linear flow resistor
The volumetric flow rate of a fluid is determined essentially independently of the properties of the fluid by guiding the volumetric fluid flow to be measured through an essentially linear flow...
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5359881 |
Viscometer for sanitary applications
A viscometer for improved sanitary measurement of the viscosity of industrial fluids. The present invention provides a viscometer integral with a flow meter or a viscometer than can be mounted onto...
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5331843 |
Capillary viscometer apparatus for an uncomplicated determination of flow characteristics of fluent materials
A capillary viscometer apparatus comprises a measuring cylinder (3) having an axially-movable piston (2) which is moved by a drive (1). The measuring cylinder (3) and the piston (2) define a...
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5327777 |
Biorheological measurement
A method of performing biorheological measurements on a suspension (4) of cells by causing some of the cells to pass through one or more microsize tunnels (3) in a solid medium (1, 2) under a...
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5315863 |
Continuous on-line measurement of fluid or slurry rheology
A rheometer or viscometer for continuously measuring the rheological properties of non-Newtonian, mixed phase fluids or slurries. The device has a vertically disposed, inverted U-tube to maintain...
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5272912 |
Apparatus and method for measuring viscosities of liquids
An apparatus for measuring viscosities of liquids has a narrow tube for a test liquid to be flowed. A differential pressure is generated between upstream and downstream of the test liquid. A...
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5257529 |
Method and device for measurement of viscosity of liquids
A viscosity of liquids is measured by inserting one end of a fine tube into one end of a tubular vessel sealed and maintained at a reduced pressure, while dipping the other end of the fine tube in...
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5222497 |
Hollow needle for use in measurement of viscosity of liquid
A hollow needle for use in measurement of viscosity of liquids, includes at least one small and slender straight tube and a hub fixed thereto and provided with a connector member. The tube includes...
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5202395 |
Manufacturing process control and product characterization
The viscous and elastic components of a viscoelastic melt, for example a polymer melt, are examined to provide information useful in quality control in the process for the manufacture of the...
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5125821 |
Resin flow and curing measuring device
A measuring device for enabling an evaluation of a moldability of a thermosetting resin by determination of parameters suitable for high accuracy forecasting of flow and curing behaviors of the...
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5076096 |
Molding of thermoset materials
Various methods have been proposed for measuring the viscosity of thermosetting polymers. It has been found that these method are generally inaccurate. A test which avoids the inaccuracies of...
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5014545 |
Apparatus for determining flow behavior index
An apparatus for on-line determination and control of the Flow Behavior Index of a molten polymer stream are disclosed along with methods for using the Index as a means for monitoring and...
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4876882 |
Viscosity detection method for liquid chromatography systems with carrier liquids having time-varying viscosity
A method for measuring the inherent viscosity of individual solute components in a multicomponent sample in solution with a solvent comprising for each component (1) measuring pressure differences...
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4858127 |
Apparatus and method for measuring native mammalian blood viscosity
A clinical whole blood viscometer and a method for obtaining instantaneous whole blood viscosity measurements over a wide range of shear rates with a single blood sample is described. A...
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4821564 |
Method and system for determining fluid pressures in wellbores and tubular conduits
Friction pressure losses are obtained for non-Newtonian or generalized Newtonian fluids being pumped through conduits at high flow rates, such as in hydraulic fracturing of subterranean formations,...
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4790933 |
Dynamic filtration unit and process of use
A dynamic filtration unit for drilling and completion fluids employs an adjustable size annulus, high filtration pressures and temperatures, automatic filtration collection and measurement, and...
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4750351 |
In-line viscometer
An in-line viscometer comprising in combination a flowsection, a flowmeter installed to measure flow through the flowsection, a friction flow tube installed parallel and suspended within the...
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4726219 |
Method and system for determining fluid pressures in wellbores and tubular conduits
Friction pressure losses are obtained for non-Newtonian or generalized Newtonian fluids being pumped through conduits at high flow rates, such as in hydraulic fracturing of subterranean formations,...
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4700567 |
Rheology test system
A rheology test system includes a self-propelled vehicle, a computer contained in the vehicle and a rheology flow loop skid mounted in an outboard storage compartment of the vehicle. The rheology...
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4677844 |
Apparent viscosity measuring apparatus
A measuring apparatus for conducting a method of testing an apparent viscosity of grease. In this apparatus, four capillary tubes are connected to a cylinder and these capillary tubes are...
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4641535 |
Flowmeter
A method and apparatus for measuring flow parameters of an unknown fluid uses four pressure sensors at fixed, spaced locations within a cylindrical member having a constricted and a full diameter...
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4624132 |
Rheometer
A method of determination of extensional viscosity and elasticity of a molten polymer or other fluid comprises making pressure measurements on flows of the fluid through an apparatus which includes...
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4566314 |
Device and method of measuring the viscosity and/or visco-elasticity of a fluid
A method and device for handling a fluid to accurately measure the viscosity and/or visco-elasticity of the fluid. More particularly, the method and device hereof is adapted for reliable...
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4539837 |
Driven-capillary viscosimeter
A viscosimeter measures the viscosity of a fluid, such as a petroleum hydrocarbon liquid, by driving a capillary through the fluid and measuring the pressure drop across the capillary. The...
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4478071 |
Viscosimeter operating continuously especially at high temperature
The present invention concerns a viscosimeter adapted to operate continuously, comprising a measuring capillary in which the liquid phase whose viscosity is measured undergoes a loss of pressure....
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4463598 |
Capillary bridge viscometer
A capillary bridge viscometer is disclosed for measuring the relative viscosity of a solute in a solvent. The bridge contains two (2) fluid flow circuits. One circuit contains two (2) capillaries...
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4442704 |
Viscosity meter
A meter for continuously monitoring the viscosity of lubricating fluids. A fluid conduit extends across the element or bearing being lubricated to employ the differential pressure of the lubricant...
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4425790 |
Prediction of extrusion performance of polymers
An apparatus is provided for predicting the extrusion performance of a thermoplastic resinous polymer, which includes at least three and preferably four capillaries arranged in series with each...
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4403502 |
Viscometer for cast foaming materials and associated method
A motionless viscometer and associated method for resinous materials including polymeric foams and non-resinous materials includes a reservoir section, a receiver section and an interposed tube. As...
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4386518 |
Apparatus and method for measuring low concentrations of high molecular weight polymers in solution
A system for determining the concentration of polymers in solution by measuring a differential pressure across a section of tubing through which the solution flows, where the tubing is bent in a...
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4316383 |
Apparatus for measuring the representative parameters of rheological properties of viscoelastic fluids
Apparatus for determining rheological parameters of viscoelastic fluids is provided. The apparatus comprises two similar cylinder-piston assemblies ending at identical flow orifices. The pistons...
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4286457 |
Viscosity measurement
A method and apparatus for determining the solution viscosity of polymers using gel partition chromatography (GPC). The method comprises obtaining a GPC analysis of the solution and measuring the...
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