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| Number | Title | Issue Date |
| 7594428 | Apparatus and method for eliminating the breakthrough peak in differential detectors The method comprising the steps of engaging the flow circuit of the detector with a reference fluid, accepting a sample in the flow circuit of the detector, sensing an attribute of the sample for determining a characteristic of the sample, changing the direction of ... | 09/29/2009 |
| 7366621 | Program product to measure density, specific gravity, and flow rate of fluids Program product to measure fluid flow characteristics in a pipeline is provided. A vortex-shedding body is positioned within the pipeline to form vortices. A vortex meter can include a vortex frequency sensor to measure the frequency of the vortices to determine the... | 04/29/2008 |
| 7334457 | Multi-capillary viscometer system and method This apparatus and method relates to the improved sensing of fluid differential pressures. The apparatus and method can be applied in multi-capillary solution viscometers and gel permeation chromatography systems used in the characterization of polymers. A valve is ... | 02/26/2008 |
| 7322243 | Acoustic wave etch rate sensor system An acoustic wave sensor system for monitoring the etch rate or etch ability of a selective material has an acoustic wave sensing device having a piezoelectric substrate and at least one electrode coupled to the substrate for generating a propagating acoustic wave an... | 01/29/2008 |
| 7305892 | Method for operating a mass flowmeter A method is disclosed for operating a mass flowmeter that employs the Coriolis principle and that incorporates a measuring tube through which flows a fluid medium, which measuring tube is stimulated to oscillate in a predefined pattern, allowing the resulting oscill... | 12/11/2007 |
| 7287431 | Wireless oil filter sensor A wireless oil filter sensing system includes an oil filter and a sensing mechanism that is connectable to the oil filter. The sensing mechanism includes one or more acoustic wave sensing elements and at least one antenna that communicate with the acoustic wave sens... | 10/30/2007 |
| 7240537 | Method for the determination of the wall friction profile along pipes by pressure transients measurements The present invention deals with a method which allows to determine the wall friction profile along pipes transporting liquids, particularly petroleum industry liquids, by measuring the pressure transients induced by fast changes in the flow rate. This method is app... | 07/10/2007 |
| 7231839 | Electroosmotic micropumps with applications to fluid dispensing and field sampling Apparatus and methods according to the present invention preferably utilize electroosmotic pumps in fluid handling and field sampling applications. The electroosmotic pumps used in these applications are capable of generating high pressure and flow without moving me... | 06/19/2007 |
| 7228727 | Lubricity measurement using MEMS A system that facilitates in situ determination of lubricity in a fluid comprises a multi-element sensor positioned within a machine, wherein the multi-element sensor obtains data regarding a plurality of parameters of a fluid. A component calculates lubricity of th... | 06/12/2007 |
| 7227147 | Process for monitoring and controlling nitrating processes with the aid of an online spectrometer A process for monitoring and/or controlling a nitrating process, having the following steps: measuring inline infrared spectra of nitric acid content in a reaction mixture stream downstream of the nitration reaction, preferably nea... | 06/05/2007 |
| 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 thermally controlled stage includes a tuning capillary tubing portion that i... | 05/08/2007 |
| 7207939 | Apparatus and method for analyzing a liquid in a capillary tube of a hematology instrument An apparatus and method for determining the density and fluid-type of a fluid flowing in a capillary tube, the velocity and viscosity of a blood sample flowing in a capillary tube, the erythrocyte sedimentation rate (ESR) of a blood sample after flow has been brough... | 04/24/2007 |
| 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 second substrate. The progress of liquid through this first channel is mo... | 03/13/2007 |
| 7143637 | Dielectric slit die for in-line monitoring of liquids processing The dielectric slit die is an instrument that is designed to measure electrical, rheological, ultrasonics, optical and other properties of a flowing liquid. In one application, it is connected to the exit of an extruder, pump or mixing machine that passes liquefied ... | 12/05/2006 |
| 7131318 | Viscometer A viscometer including a thermal block, a thermo device to control temperature of the thermal block, a temperature sensor to sense temperature of the thermal block, a capillary tube embedded in the thermal block such that the capillary tube is in thermal contact wit... | 11/07/2006 |
| 7114374 | Sensitive spinline-type extensional viscometer for mobile liquids employing very small liquid volumes A method for making fluid elasticity measurements using an extensional viscometer (100) is disclosed, where stress is not directly measured but is inferred from an accurate measurement of the change in the rate of flow of a liquid during passage through a ver... | 10/03/2006 |
| 7111499 | Viscometer tube A viscometer tube includes a tubular body divided into three sections: an upper feed section, a lower capillary section and an intermediate transition section providing a transition between the upper feed section and the lower capillary section. Liquid flows from th... | 09/26/2006 |
| 7066024 | Float adapted to track an interface between two liquids of differing density A float adapted to track an interface between two liquids of differing density, includes a hollow buoyant body having an interior cavity adapted to retain liquid. At least one upper access opening is provided in the body, which is adapted to permit filling of the in... | 06/27/2006 |
| 7049147 | Method for process line testing An apparatus capable of characterizing the fluid content of chemicals in a reaction line comprises a rheometer. The apparatus can be connected to or included in a reaction flow stream, and has a retractable wall 26 that opens to provide an opening 28 t... | 05/23/2006 |
| 7036362 | Downhole determination of formation fluid properties A method is disclosed for determining viscosity and density of fluid from formations surrounding an earth borehole, including the following steps: (a) suspending a formation testing device in the borehole; (b) drawing formation fluid into the device; (c) causing the... | 05/02/2006 |
| 7024921 | Capillary devices for determination of surface characteristics and contact angles and methods for using same Devices are presented which allow determination of unknown surface properties through the creation of a channel capillary, comprised in part of the subject surface or surfaces, and measurement of the capillary pressure created by a test fluid within the resultant ch... | 04/11/2006 |
| 7024920 | Lubricity measurement using MEMs sensor A system that facilitates in situ determination of lubricity in a fluid comprises a multi-element sensor positioned within a machine, wherein the multi-element sensor obtains data regarding a plurality of parameters of a fluid. A component calculates lubricity of th... | 04/11/2006 |
| 7013714 | Viscosity measurement apparatus A viscosity measurement apparatus, or viscometer, including a fluid flow channel, a heating element disposed at least around an exterior portion of the fluid flow channel near an inlet end, and a temperature sensor disposed within the fluid flow channel downstream f... | 03/21/2006 |
| 6965430 | Device for a transparent pipe intended for optical counting and measuring A circular, transparent pipe device for optically counting and measuring objects carried with a fluid within the pipe by means of light beams exiting through the wall of the pipe. The outer radius of the pipe equals or nearly equals the product of the inner radius o... | 11/15/2005 |
| 6955923 | Device and method for investigating the flowability of a physiological fluid sample To investigate the flowability of a physiological fluid sample, an uptake passage (12) for the fluid sample (16), an actuator device (18) for the cyclic change in orientation of measuring particles (14) in the fluid sample (16), an... | 10/18/2005 |
| 6945095 | Non-intrusive multiphase flow meter Embodiments of the present invention generally provide methods, apparatus, and systems for determining void fractions of individual phase components of a multiphase mixture. The void fractions may be determined based on measured parameters of the mixture as a whole,... | 09/20/2005 |
| 6941797 | Device and method for determining the viscosities of liquids by means of the capillary force The invention relates to a device and a method for automated and simultaneous determination of the viscosity of a plurality of liquids. ... | 09/13/2005 |
| 6935164 | Refiner control In the present invention a refiner (108) of a mechanical pulping line is supplied with a controllable acoustic source (14), arranged for emitting acoustic signals into the pulp fluid. The controllable acoustic signal is allowed to interact with the fib... | 08/30/2005 |
| 6907772 | Dual riser/single capillary viscometer A blood viscosity measuring system and methods for measuring blood viscosity monitors the change in height of one of two, oppositely-moving, columns of blood from the circulating blood of a patient and, given the dimensions of a capillary tube through which the bloo... | 06/21/2005 |
| 6898963 | Apparatus and method for measuring viscosity An apparatus and method for measuring the viscosity of a sample fluid are disclosed. In one embodiment, a holding vessel (82) receives the sample fluid (94) and a weighted fluid (96). The weighted fluid (96) has a greater specific gravity... | 05/31/2005 |
| 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 following capillaries in a flow conduit system with two legs. The flow cond... | 04/12/2005 |
| 6796168 | Method for determining a characteristic viscosity-shear rate relationship for a fluid A method for determining the viscosity of a fluid flowing through a system at any point in the system whereby the method involves determining a characteristic relationship for the fluid between viscosity and shear rate; obtaining a shear rate of the fluid as it move... | 09/28/2004 |
| 6779382 | Process for determining changes in liquid media, in particular coating agents under shear stress A process for determining changes in a liquid medium, in particular a liquid coating agent or its components, caused by shear stress, in which a given volume of the medium is allowed to pass repeatedly through a shear unit under reproducible conditions. ... | 08/24/2004 |
| 6755079 | Method and apparatus for determining fluid viscosity A downhole tool and method for determining the viscosity of a reservoir fluid, the tool including a passage having entry, intermediate and exit regions, in which the reservoir fluid flowing through the passage will have a lower Reynolds number in the intermediate re... | 06/29/2004 |
| 6745615 | Dual riser/single capillary viscometer A blood viscosity measuring system and methods for measuring blood viscosity monitors the change in height of one of two, oppositely-moving, columns of blood from the circulating blood of a patient and, given the dimensions of a capillary tube through which the bloo... | 06/08/2004 |
| 6732573 | Single riser/single capillary blood viscometer using mass detection or column height detection An apparatus and method for determining the viscosity of the circulating blood of a living being over plural shear rates caused by a decreasing pressure differential by monitoring the changing weight of the blood, or the changing level of a column of blood over time... | 05/11/2004 |
| 6708553 | Viscosimeter A viscosimeter for measuring the relative, intrinsic or inherent viscosity of a solution in a solvent with at least one flow resistance and one feeding point for the solution to be examined in a conduit system as well as with respective manometers on the flow resist... | 03/23/2004 |
| 6584832 | High-temperature characterization of polymer libraries Rapid characterization and screening of polymer samples to determine average molecular weight, molecular weight distribution and other properties is disclosed. Rapid flow characterization systems and methods, including liquid chromatography and flow-injec... | 07/01/2003 |
| 6581440 | Process and device for determining changes in liquid media, in particular coating agents under shear stress A process and a device for determining changes in a liquid medium, in particular a liquid coating agent or its components, caused by shear stress, in which a given volume of the medium is allowed to pass repeatedly through a shear unit under reproducible ... | 06/24/2003 |
| 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. A chamber is created between the actuated piston and floa... | 06/10/2003 |
