Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7484403 | Method and device for determining at least one dynamic property of a deformable solid or fluid material Method of determining at least one dynamic characteristic of a sample of a deformable solid or fluid material, comprising: the contacting of said sample (24, 42) with at least one interaction surface (23, 25, 41a, 41b); the applica... | 02/03/2009 |
| 7367224 | Rheometer and method for temperature control of its measuring chamber A rheometer has a measuring chamber which is delimited by a measuring chamber wall in which at least one measuring component is disposed for acceptance of a sample. The measuring chamber can have a gas flowing through it whose temperature is controlled in a desired ... | 05/06/2008 |
| 7287416 | Low maintenance high pressure viscometer Viscometer (80) with a rotor (51) rotatable by a coupling magnet (34) and a driving magnet (38) to shear a tested fluid thus imparting torque to a bob (30) mounted on a bob shaft (24) supported via a pair of bob shaft bearin... | 10/30/2007 |
| 7287415 | Microelectromechanical system (MEMS) viscosity sensor for fluid health monitoring Embodiments of the present invention are directed to a MEM viscosity sensor that is configured to be operated submerged in a liquid. The MEMS viscosity sensor comprises a MEMS variable capacitor comprising a plurality of capacitor plates capable of being submerged i... | 10/30/2007 |
| 7187107 | Closed-loop feedback control positioning stage Provided is a closed-loop feedback control positioning stage comprising at least one block formed therein, a plurality of hinge mechanisms for attaching the block in the stage, at least one actuator formed in the block, the actuator adapted to bend for moving the bl... | 03/06/2007 |
| 7127950 | Method for determining a surface contact force A method of measuring a load on a surface produced by a contact force. An elastic film or coating is located on a supporting surface to provide an indication of normal and tangential or shear forces applied to the surface. A thickness measurement, corresponding to a... | 10/31/2006 |
| 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 |
| 7044919 | Test methods, devices and test kits A method for determining the time of maximum fertility in the mammalian ovulation cycle, for the purpose of assisting conception, wherein testing is conducted over a period of days in the current ovulation cycle on samples of body fluid obtained from an individual h... | 05/16/2006 |
| 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 |
| 6962086 | Rheometer A rheometer 1, an example of which is shown in FIG. 1, comprising an upper die 2 and a lower die 3. Extending on the vertical axis of this die arrangement is a pneumatic cylinder shaft 6, which is connected to the heater element | 11/08/2005 |
| 6951127 | Digital viscometer with non contact distance sensor Viscometer (80) with a sample cup (42) rotatable by a pulley (26) and a timing belt (30) to shear a tested fluid thus imparting torque to a bob (44) mounted on a shaft (10) supported via a frictionless bearing (58), a... | 10/04/2005 |
| 6948356 | Viscoelasticity measuring instrument A viscoelasticity measuring instrument for measuring a viscoelasticity of a sample has a temperature detection control unit for obtaining, prior to a practical measurement operation, a measurement executable temperature range for the sample by an experimental temper... | 09/27/2005 |
| 6931916 | Viscometer sag test shoe Methods and apparatus for measuring sag properties of a drilling fluid using a rotary viscometer. An insert, or shoe, is placed at the bottom of the heat cup containing the fluid to be tested. A rotating cylinder is disposed within the fluid and solid particles are ... | 08/23/2005 |
| 6722188 | Apparatus for process line testing The invention relates to an apparatus and method for testing the properties of chemicals in a reaction flow stream. In the method, chemicals from the reaction flow stream are directed to the apparatus for testing the physical properties of the chemicals, which is an... | 04/20/2004 |
| 6691559 | Viscometer A viscometer for measuring liquid viscosities based upon rotational deflections of a suspended bob. The viscometer comprises a deflection indicator, a deflection reader located at a spaced relative position with respect to the indicator, a rotating elemen... | 02/17/2004 |
| 6681618 | Rheometer for rapidly measuring small quantity samples The present invention relates to a miniature rheometer and improved force sensor elements which may advantageously be used in combination with the miniature rheometer. The miniature rheometer is adapted to determine rheological characteristics of material... | 01/27/2004 |
| 6668622 | Rheometer for rapidly measuring small quantity 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... | 12/30/2003 |
| 6666073 | Apparatus for process line testing The invention relates to an apparatus and method for testing the properties of chemicals in a reaction flow stream. In the method, chemicals from the reaction flow stream are directed to the apparatus for testing the physical properties of the chemicals, ... | 12/23/2003 |
| 6655194 | Rheometer for rapidly measuring small quantity 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... | 12/02/2003 |
| 6644101 | Rheometer for rapidly measuring small quantity 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... | 11/11/2003 |
| 6591663 | Viscosity and viscoelasticity measuring instrument A viscosity and viscoelasticity measuring instrument has a cam, a follower arm, a flat spring, a plate fixture, and a removable plate assembly. The cam is a rotating circular disk with a spiral slot. A cam follower on the follower arm resides in the spira... | 07/15/2003 |
| 6584833 | Apparatus and method for analyzing well fluid sag An apparatus and method are disclosed for measuring or analyzing dynamic and static sag caused by settling of weighting materials in drilling fluids or other solids bearing fluid. The apparatus comprises a tube and shear shaft assembly that allows for a c... | 07/01/2003 |
| 6575021 | Sample surface component for an instrument that measures viscosity and viscoelasticity A sample surface component for an instrument the measures viscosity and viscoelasticity. The instrument has a cam, a follower arm, a flat spring, a plate fixture, and a removable plate assembly. The cam is a rotating circular disk with a spiral slot. A ca... | 06/10/2003 |
| 6484567 | Rheometer for rapidly measuring small quantity samples The present invention relates to a parallel rheometer and improved force sensor elements, which may advantageously be used in combination with the parallel rheometer. The parallel rheometer of the present invention allows simultaneous measurements of a pl... | 11/26/2002 |
| 6408683 | Laboratory asphalt stability test and apparatus An asphalt stability testing vessel includes a container, an external heater, an internal heater, an agitator assembly, a temperature controller, and at least one sampling tube. The external heater is disposed on the outside surface area of the container.... | 06/25/2002 |
| 6357281 | Methods and apparatus for detecting rheological properties of a material To detect rheological material properties of a fluid, flowable or elastic material, the material is exposed to harmonic excitation with at least one fundamental and at least one parameter F is measured that is variable in response to the harmonic excitati... | 03/19/2002 |
| 5365777 | Rheometer with flow diverter to eliminate end effects A rheometer comprises a thin-walled bob having two ends, adjacent at least one of which ends there is disposed a respective flow diverter plate to eliminate adverse end effects caused by swirling fluid in the rheometer.... | 11/22/1994 |
| 5303578 | Rheometer Apparatus and a method for investigating dynamic rheological properties of a viscoelastic medium involves oscillating at least one shear wave generation surface in a container containing the viscoelastic medium such that shear waves generated thereby impi... | 04/19/1994 |
| 5157962 | Vibratory viscometer transducer with isolation support for inline viscosity sensor A viscosity measuring transducer especially useful for process control of fluids. The transducer oscillates an immersed blade sensor in the direction of the plane of the blade in order to maximize generation of shear waves and to minimize generation of co... | 10/27/1992 |
| 4893500 | Method of measuring the flow properties of high viscosity fluids as well as a device for carrying out the inventive method A method of measuring the flow properties of preferably high viscosity fluids, where a fluid is applied to a gap between a rod and a ring and subjected to a shear force by the mutual displacement of the ring and the rod, and where either the rod or the ri... | 01/16/1990 |
| 4466271 | Apparatus for testing lubricating and material properties In an apparatus for testing lubricating or material properties, two clamping assemblies are pressed together. Each clamping assembly has a clamping surface facing the clamping surface on the other assembly. The first clamping surface has two annular rolle... | 08/21/1984 |
| 4164212 | Devices for menstrual cycle phase determination An instrument for obtaining and testing a bodily mucus for determining the rheological properties of the bodily mucus in order to ascertain menstrual cycle phase comprises a sample collecting probe and a bearing member. A mucus sample from a bodily cavity... | 08/14/1979 |
| 4126035 | Eccentric viscometer for testing biological and other fluids A device for determining the rheological properties of a liquid comprises an inner bearing member having a horizontally disposed outer cylindrical surface and an outer bearing member having a horizontally disposed inner cylindrical surface, each cylindric... | 11/21/1978 |
| 4072045 | Viscometer for indicating rheological properties of fluids having high and low viscosity components A fluid having high and low viscosity components is introduced into the test region between a pair of bearing members which are biased for relative motion and which are characterized by at least one porous bearing surface. The low viscosity component is a... | 02/07/1978 |
| 4067229 | Viscometer for indicating rheological properties of biological fluids A biological fluid is introduced into the sheer region between a pair of bearing members which are biased for relative motion and which are characterized by a particular surface finish. The rheological properties of the biological fluid are a function of ... | 01/10/1978 |
| 4059986 | Mucus testing processes and devices A mucus sample from a bodily cavity is introduced between inner and outer bearing members, one of which is fixed, one of which is biased, and both of which have bearing surfaces of predetermined surface finish. Relative mechanical movement of the members ... | 11/29/1977 |
| 4002056 | Processes and devices for determining properties of viscous fluids A device for determining the rheological properties of a fluid comprises a pair of cooperating members, the working face of each member defining parallel discrete ridges or flutes, the outermost portions of which define ridge lines, the ridges of one memb... | 01/11/1977 |
| 3982423 | Mucus testing processes and devices A mucus sample from a bodily cavity is introduced between inner and outer bearing members, one of which is fixed, one of which is biased, and both of which have bearing surfaces of predetermined surface finish. Relative mechanical movement of the members ... | 09/28/1976 |
| 3979945 | Eccentric viscometer for testing biological and other fluids A device for determining the rheological properties of a liquid comprises an inner bearing member having a horizontally disposed outer cylindrical surface and an outer bearing member having a horizontally disposed inner cylindrical surface, each cylindric... | 09/14/1976 |
