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| Number | Title | Issue Date |
| 8122759 | Determining fluid rheological properties Controlling a well injection operation, such as a well fracturing operation, includes identifying a flow characteristic of a fracturing fluid, identifying a flow characteristic of a base fluid used for forming the fracturing fluid, determining an amount of friction ... | 02/28/2012 |
| 7832257 | Determining fluid rheological properties Controlling a well injection operation, such as a well fracturing operation, includes identifying a flow characteristic of a fracturing fluid, identifying a flow characteristic of a base fluid used for forming the fracturing fluid, determining an amount of friction ... | 11/16/2010 |
| 7784330 | Viscosity measurement A micro-fluidic device and methods for measuring one or more rheologic properties of a fluid. The micro-fluidic device includes a substrate and at least one cover bonded to a surface of the substrate with a fluid channel formed in at least one of the cover or the su... | 08/31/2010 |
| 7770436 | Micro rheometer for measuring flow viscosity and elasticity for micron sample volumes A micro-rheometer for measuring flow characteristics such as viscosity, elasticity, and flow rate of a sample liquid combines well defined micro-fabricated flow channels having geometry changes forming a constriction region therein to a monolithically fabricated pre... | 08/10/2010 |
| 7752895 | Method for using an alternate pressure viscometer A method for determining the viscosity and relative change of viscosity of a fluid over plural shear rates caused by a decreasing or increasing pressure differential resulting from fluid flow to a defined chamber in a capillary system. The flow of liquid through the... | 07/13/2010 |
| 7698930 | Method and apparatus for measuring pressure drop of magneto-rheological suspensions in microchannels Methods and apparatus are disclosed for characterizing flow of magneto-rheological suspensions through microchannels. The apparatus includes a pump for pumping a the magneto-rheological suspension; a microchannel hydraulically coupled to the pump and configured to r... | 04/20/2010 |
| 7437912 | Device and method for sensing rheological properties of a fluid A method and device for assessing rheological properties of a fluid, including lubricity and viscosity. The invention utilizes a tube into which the fluid is introduced, and relies on tracking the movement of the fluid through the tube either alone or with one or mo... | 10/21/2008 |
| 7320675 | Method and apparatus for modulating cellular metabolism during post-ischemia or heart failure A drug delivery system detects a cardiac condition indicative of a need for increasing a cardiac metabolic level and, in response, releases a drug into tissue or blood to shift a source of metabolically synthesized energy fueling cardiac contraction from fatty acid ... | 01/22/2008 |
| 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 system that injects a test sample to the channel at a desired flow rate. ... | 11/06/2007 |
| 7246515 | Filtration tester A filtration tester has a scale, a collector disposed on the scale, a pump having an outlet aligned with an opening of the collector, and a force sensor connected to the pump. ... | 07/24/2007 |
| 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 sample and a pressure regulator for applying hyperbaric pressure to a sam... | 07/03/2007 |
| 7236821 | Chronically-implanted device for sensing and therapy Systems, devices and methods are provided for providing sensing and therapy functions using a chronically-implanted device. According to one embodiment, the device includes a structure adapted to be chronically placed within a biosystem, and further includes sensing... | 06/26/2007 |
| 7223282 | Remote activation of an implantable device The invention is directed to an implantable device, such as a stent, for delivering a therapeutic substance. The device includes a reservoir containing a therapeutic substance and an energy converter to cause the release of the substance. ... | 05/29/2007 |
| 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 |
| 7209783 | Ablation stent for treating atrial fibrillation An apparatus and method for treating atrial fibrillation with ablation therapy in which a stent is deployed within a pulmonary vein and tissue surrounding the stent is ablated with radiofrequency energy to stop discharges from ectopic foci in the vein from reaching ... | 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 |
| 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 (48), the flow rates of said restrictions ( | 01/09/2007 |
| 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 |
| 7089055 | Method and apparatus for delivering pre-shock defibrillation therapy An apparatus and method is presented for improving cardiac function after successful termination of a tachyarrhythmia such as ventricular fibrillation. A series of electrical stimulation pulses are delivered prior to a defibrillation shock if one or more specific cr... | 08/08/2006 |
| 7072711 | Implantable device for delivering cardiac drug therapy An implantable medical device in which an electrogram is recorded and analyzed in order to detect changes indicative of cardiac ischemia. Cardiac ischemia may be detected by recording an electrogram from a sensing channel of the device and comparing the recorded ele... | 07/04/2006 |
| 7054766 | Fluid properties evaluation Fluid flow properties often dictate the performance of processing operations. The present invention relates to a system for evaluating properties of a fluid flowing in a pipe. A test cell (20) which includes two parallel surfaces (5, 6) which are posit... | 05/30/2006 |
| 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 |
| 6990851 | Microfluidic viscometer Microfluidic devices, systems, and methods measure viscosity, flow times, and/or other flow characteristics within the channels, and the measured flow characteristics can be used to generate a desired flow. Multi-reservoir pressure modulator and pressure controller ... | 01/31/2006 |
| 6928860 | Heat-transfer-inhibiting motor and rotor Heat-inhibition respecting a motor is provided in connection with a heated instrument through a stand-off mount system and/or a heat-inhibiting rotor/stirrer. The instrument can be a hot bath containing instrument where stirring of the contents of the bath can be ca... | 08/16/2005 |
| 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 |
| 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 thereby obtain a set of data. The data is then directly compared using, f... | 01/11/2005 |
| 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 |
| 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 a pressure measuring device disposed to measure the diffe... | 07/01/2003 |
| 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 in stable colloidal state, at the intake (4) of a capillary... | 06/17/2003 |
| 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 |
| 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 of capillaries, a melt distributor is provided in the suppl... | 05/13/2003 |
| 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 temperature of at least TNF +5° C., with TNF | 12/17/2002 |
| 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, the fluid flows in a laminar manner through a first (12) and a... | 07/02/2002 |
| 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. The method includes the steps of (a) attaching at least t... | 05/29/2001 |
| 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 such as fast curing thermosets and fast crystallizing the... | 02/15/2000 |
| 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 capillary measuring tube is determined with and without a sam... | 11/09/1999 |
| 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 each contained in the chamber, and a variable speed drive... | 12/08/1998 |
| 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. The finished product is passed through a venturi where a ... | 12/10/1996 |
| 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 resistor. An alternating flow of the fluid is superimposed on... | 07/23/1996 |
| 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 an existing flow meter. The viscometer includes two adjac... | 11/01/1994 |
