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| Number | Title | Issue Date |
| 7249523 | Apparatus and method for measuring mechanical properties A rheological measurement can be made comprising the steps of disposing a sample to be measured between two opposing surfaces of a fixture; coupling two opposing surfaces of the sample with a corresponding adjacent one of the two opposing surfaces of the fixture to ... | 07/31/2007 |
| 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 |
| 7047794 | Tether plate sensor for measuring physical properties of fluid samples The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine ... | 05/23/2006 |
| 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 |
| 6978662 | Rheometer A rheometer has an upper measuring part and a lower measuring part, between which a measuring chamber is formed for receiving a sample of a substance to be examined, wherein the two measuring parts can be moved relative to each other and, in particular, can be rotat... | 12/27/2005 |
| 6952951 | Method and device for measuring the viscosity of a liquid A method and a device are proposed for measuring the viscosity of a liquid (12), a conclusion being reached on the temperature of the liquid (12 at the location of the viscosity sensor (20), starting from temperature measurements and/or viscosit... | 10/11/2005 |
| 6931915 | Wide range dynamic rheometer A rheometer includes a holder assembly for coupling a test specimen to a motor assembly to effect rotational strain in the test specimen while enabling the determination of axial displacement effected by the test specimen normal to the direction of the rotational st... | 08/23/2005 |
| 6840305 | Cold cranking simulator having hybrid heat transfer system A heat transfer apparatus for use in measuring a rheological property of a test sample includes a receptacle for receiving the test sample and a heat conveying member in heat transfer relation to the receptacle. The heat conveying member has internal passages extend... | 01/11/2005 |
| 6810717 | Method for determining engine lubricating oil condition Activation energy, W, is determined from oil conductivity measurements to thereby provide engine oil condition from a known relationship between viscosity and W. Changes of W at a given temperature as the oil ages are reflective of changes in viscosity of the oil at... | 11/02/2004 |
| 6786080 | Method for assessing the deterioration of motor oil A method for assessing the deterioration of motor oil is provided, in which the oil viscosity of the motor oil is measured by a sensor, and the length of an oil-change interval is determined in an evaluating electronics having a display device. According to the pres... | 09/07/2004 |
| 6725707 | In-situ liquid viscosity measurement A device for determining the viscosity of a liquid has a temperature sensor and a heater disposed in spaced relation within a channel. When the device is immersed in a liquid, the heater heats the liquid and the temperature sensor detects the change in temperature o... | 04/27/2004 |
| 6715915 | Fluidity determination method of a packed fluid and device used in the same A method and device for determining fluidity of fluid in a pack that is moving without breaking and opening the pack by locating at least two measurement points on the surface of the pack filled with the fluid, measuring the surface temperatures of the measurement p... | 04/06/2004 |
| 6695470 | Apparatus and method for viscosity measurement Apparatus and method for determining a change in the viscosity of a fluid, the apparatus including means for heating a portion of the fluid so that the heated portion will rise within the fluid, means for determining the heated portion's rise time, means ... | 02/24/2004 |
| 6691561 | Rheological measurement process A method and apparatus for measuring the rheological properties of a polymer melt includes flowing the polymer melt from a first reactor to a device through a conduit at a predetermined flow rate, measuring a first pressure of the polymer melt at a first ... | 02/17/2004 |
| 6580056 | Biological specimen heating device and quality control method for immunohistochemistry heat retrieval procedures A heating device for heating biological specimens is comprised of an electric pressure cooker with a pressure gauge, and a temperature sensor connected to a controller with a temperature display and a temperature alert. The controller is arranged to heat ... | 06/17/2003 |
| 6320170 | Microwave volatiles analyzer with high efficiency cavity A volatiles analyzer is disclosed that includes a source of microwave radiation that can selectively produce at least one predetermined frequency of microwave radiation. A cavity is in communication with the source. The analyzer includes an analytical pan... | 11/20/2001 |
| 6164818 | Method and apparatus for measuring viscous heating of viscoelastic materials Method and apparatus for measuring viscous heating/heat build-up of viscoelastic materials, such as rubber and polymer compounds. Temperature changes in the viscoelastic material are measured during application of a shearing force to the viscoelastic mate... | 12/26/2000 |
| 6079253 | Method and apparatus for measuring selected properties of a fluid of interest using a single heater element A method and apparatus for determining selected fluid properties including thermal conductivity, pressure and/or temperature using a single heater element of the sensor, and in a relatively short period of time. This is accomplished by measuring a variabl... | 06/27/2000 |
| 6009747 | Method for evaluating drilling fluids A method for evaluating drilling fluids to be used with clay-rich rocks such as shales which comprises collecting shales so as to preserve the downhole hydration condition and then submitting such preserved shale to Thermo-Gravimetric Analysis, so as to o... | 01/04/2000 |
| 5905196 | Rotational viscometer temperature sensor A viscometer has a rotatable member and a stationary wall engageable with material to be measured. A lens extends through at least a portion of the wall of the viscometer such that laminar flow of material to be measured is undisturbed while shearing acro... | 05/18/1999 |
| 5877409 | Method and system for determining viscosity index A method and system for determining the viscosity index of a petroleum liquid. The determination may be made on a single, discrete sample or on a continuous sample stream. A sample is fed into a first pressure drop device where a first pressure drop is me... | 03/02/1999 |
| 5708196 | Method and apparatus for determining the cloud point of oil The invention concerns a method and an apparatus for determination of the cloud point of oil. In the method according to the invention the cloud point is determined from a turning point on the oil cooling curve. The method of the invention may be realized... | 01/13/1998 |
| 5691206 | Method and device for solid phase microextraction and desorption A device for carrying out solid phase microextraction is a fiber contained in a syringe. The fiber can be solid or hollow. The syringe has a barrel and a plunger slidable within the barrel, the plunger having a handle extending from one end of the barrel.... | 11/25/1997 |
| 5661233 | Acoustic-wave sensor apparatus for analyzing a petroleum-based composition and sensing solidification of constituents therein An acoustic-wave sensor apparatus and method. The apparatus for analyzing a normally liquid petroleum-based composition includes at least one acoustic-wave device in contact with the petroleum-based composition for sensing or detecting the presence of con... | 08/26/1997 |
| 5452601 | Method for simultaneous determination of thermal conductivity and kinematic viscosity A heating sensor capable of generating heat and measuring its own temperature is placed in a fluid and a thermometric sensor is placed in the fluid and inside a temperature boundary layer formed around the heating sensor upon heat generation therefrom. A ... | 09/26/1995 |
| 5017875 | Disposable sensor Two lead wires for each, connected to opposite ends of a heat generating element are secured to a holder. These lead wires form four-point-terminals at their other ends and thereby a disposable sensor is provided. A current source and a voltmeter are conn... | 05/21/1991 |
| 4947678 | Method for measurement of viscosity change in blood or the like and sensor thereof Here is disclosed a method for measurement of viscosity change in blood or the like comprising steps of disposing a sensor including of an endothermic or exothermic element in blood or the like, stimulating blood or the like so as to cause a viscosity cha... | 08/14/1990 |
| 4677843 | Roller oven for testing fluids An oven for testing fluid samples to determine the effects of temperature and various chemical additives on the rheological, filtration and chemical properties of the sample under simulated circulating conditions comprises an environmental chamber having ... | 07/07/1987 |
| 4603979 | Procedure and means for measuring the internal friction of liquid substances The object of the present invention is to measure the magnitude of the friction and coefficient of friction or liquids with high viscosity or internal friction, such as molten plastic mix, e.g. in extruders by increasing the velocity of flow in a special ... | 08/05/1986 |
| 3930399 | Viscosity detection apparatus and method Apparatus and method applicable to liquid chromatography for continuously detecting the viscosity of the effluent from an analysis column of a chromatograph system. The effluent is forced through a tubular path in a flow resistance element, which may cont... | 01/06/1976 |
