Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7681437 | Device for determining the viscosity of fluids A device for determining the viscosity of fluids. The device includes an injector, which has a piston and a hollow cylinder with a nozzle. The device further includes a cannula. The device also includes a forward-feed device with the aid of which the piston is displ... | 03/23/2010 |
| 7614285 | Dynamic reciprocating-bob rheometry A sensor for making rheological measurements takes the form of a ferromagnetic bob alternately driven through a sample fluid in opposite directions by magnetic force from two alternately driven coils. The bob's position affects the mutual inductance between the coil... | 11/10/2009 |
| 7594429 | System and method for improved optical measurements during rheometric measurements A rheometric system includes an optical encoder coupled to a rotating shaft and configured to detect a rotational position of the shaft with respect to a reference. The rotational information is forwarded to a program or memory. An optical rotation plate is mechanic... | 09/29/2009 |
| 7578171 | Method and device for characterizing a fluid A method for the characterizing a fluid containing particles reflecting ultrasounds wherein a sample of fluid placed between two surfaces (5, 6) in a rheometer (1) undergoes stress in order to measure the rheological characteristics of the sample (8... | 08/25/2009 |
| 7526946 | Constant-force rheometer The present invention is generally directed to a method for measuring interfacial stick-slip transitions (SST) and an improved constant-force shear capable of measuring interfacial SST. Some embodiments are capable of measuring SST under simple shear conditions and/... | 05/05/2009 |
| 7500385 | System for in-situ optical measurement and sample heating during rheometric measurements An optical rheometer system includes a rheometer chamber that can retain a fluid sample to be measured. A light source is provided that creates a light beam incident on the fluid sample. A Peltier heating plate is provided that has a channel region located within th... | 03/10/2009 |
| 7412877 | High pressure viscometer with chamber preventing sample contamination 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... | 08/19/2008 |
| 7357016 | Process and device for determining viscosity A process and a device for determining the viscosity of a fluid are proposed. Very simple and accurate determination is enabled in that the magnetic particles in the fluid are set into vibration by a magnetic field which varies over time. A measurement of the amplit... | 04/15/2008 |
| 7353696 | Apparatus for measuring methanol concentration An apparatus for measuring a methanol concentration is provided. The apparatus is located in a pipe which supplies liquid fuel to the anode of a direct liquid feed fuel cell, and may include a vertical supporting beam located in the pipe; a horizontal plate located ... | 04/08/2008 |
| 7353695 | Methods and apparatus for determining properties of a fluid A method and system for determining properties of a fluid involves interacting the fluid with a standing wave in a first state to establish the standing wave in a second state, analyzing an electric signal associated with the standing wave to determine a characteris... | 04/08/2008 |
| 7353694 | Rheometer A rheometer and method of making rheological measurements are disclosed, in which a sample is supported between plates and an alternating movement is applied by a driver, support rod and plate. Force and displacement measurements are taken and the property determine... | 04/08/2008 |
| 7328604 | Microelectromechanical (MEM) fluid health sensing device and fabrication method A microelectromechanical (MEM) fluid health sensing device comprises a viscosity sensor which provides an output that varies with the viscosity of a fluid in which it is immersed, and at least one other sensor which provides an output that varies with another predet... | 02/12/2008 |
| 7290450 | Process diagnostics A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flow... | 11/06/2007 |
| 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 |
| 7284413 | Method and apparatus for measuring viscosity An apparatus for measuring the viscosity of a fluid having a first rigid member extending from a body of semiconductor material and provided with a first conductive path and a second resiliently flexible member provided with a second conductive path and arranged in ... | 10/23/2007 |
| 7263874 | Methods and apparatus for determining properties of a fluid A method and system for determining properties of a fluid involves interacting the fluid with a standing wave in a first state to establish the standing wave in a second state, analyzing an electric signal associated with the standing wave to determine a characteris... | 09/04/2007 |
| 7260980 | Liquid cell and passivated probe for atomic force microscopy and chemical sensing The invention provides a liquid cell for an atomic force microscope. The liquid cell includes a liquid cell housing with an internal cavity to contain a fluid, a plurality of conductive feedthroughs traversing the liquid cell housing between the internal cavity and ... | 08/28/2007 |
| 7257984 | Miniaturized sensor device for detecting characteristics of a fluid, in particular a lubricating oil A miniaturized sensor device comprises at least one pair of active projecting elements or cantilevers, which are set parallel to one another and at a micrometric or sub-micrometric distance apart and are designed to be submerged at least partially in a fluid. Each p... | 08/21/2007 |
| 7207210 | Multi-decade viscometric or rheologic measurements of a material undergoing state change Range-extending method and apparatus for testing the viscosity of a fluid (10) undergoing a state change utilizing a viscometer (2) with a rotary assembly (42) for measuring, by automatically changing the rotational speed of the rotary assembly ... | 04/24/2007 |
| 7201040 | Rheometer with axial resistive force measurement A rheometer comprises a vessel mounted on a stand and a rotatable blade mounted above the vessel. A substance for rheometric assessment is put in the vessel. The rotor is advanced linearly into the substance while at the same time rotating. The blade is arranged wit... | 04/10/2007 |
| 7194895 | Rheometer A rheometer and method of making rheological measurements is disclosed, in which a sample is supported between plates and an alternating movement is applied by a driver, support rod and plate. Force and displacement measurements are taken and the property determined... | 03/27/2007 |
| 7189362 | Optical waveguide microcantilever with differential output and associated methods of cantilever sensing A microcantilever sensing system includes a waveguide cantilever that permits an optical signal to propagate through an endface of the cantilever. The propagated signal is received by a receiver waveguide across a gap from the cantilever. The receiver waveguide prov... | 03/13/2007 |
| 7185530 | Device to measure the solidification properties of a liquid film and method therefor The present invention is directed to an apparatus and a method for monitoring the viscoelastic properties, of a liquid film (e.g. coating). The apparatus comprises a substrate supporting a liquid film, a probe to contact the liquid film, means for effecting relative... | 03/06/2007 |
| 7181956 | Rheometer A rheometer has a measuring shaft which is borne for rotation about and/or axial displacement along its longitudinal axis and has a detection device for determination of the normal force and/or the torque which acts on the measuring shaft during a measurement. The d... | 02/27/2007 |
| 7158693 | Molecular detection using an optical waveguide fixed to a cantilever The invention relates to devices and methods for detecting a ligand in a liquid, based on deflection of one or more microscopic cantilevers. Each cantilever has an optical waveguide fixed thereto or integral therewith. Deflection of the cantilever is detected by ass... | 01/02/2007 |
| 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 |
| 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 |
| 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 |
| 7007546 | Measurement, compensation and control of equivalent shear rate in acoustic wave sensors A method for measuring viscosity and shear rate at which the measurement is performed is provided, by utilizing an acoustic wave sensor, and calculating the shear rate as a function of the characteristic rate of quartz movement in response to a given power transmitt... | 03/07/2006 |
| 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 |
| 6975043 | Pressurized gas to electrical energy conversion for low-power field devices An industrial process field device with improved power generation is provided. The process device can be a process variable transmitter, process actuator, or any other suitable field device. The field device includes a wireless transceiver that transceives informati... | 12/13/2005 |
| 6952950 | System and method for automatic identification of a detachable component of an instrument A system and method for automatic identification of a detachable component of an instrument is disclosed. The detachable component includes a machine-readable device that contains information associated with the detachable component. The machine-readable device can ... | 10/11/2005 |
| 6755073 | Sensor for measuring the viscosity of a liquid A sensor for measuring the viscosity of a fluid, which has an oscillator. The oscillator is dipped into the fluid. The surface of the oscillator is provided with a dirt-repellent coating. ... | 06/29/2004 |
| 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 |
| 6668621 | Viscosity measurement by means of damped resonant vibration normal to an approximate rigid plate A brief but intense magnetic impulse generated by a coil 42 is used to excite resonant bending mode vibration in a magnetically permeable cantilevered beam 2 immersed in a fluid 22. A permanent magnet 36 and a magnetically permeable circuit 44, 38, 40, 56... | 12/30/2003 |
| 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 |
| 6602714 | Viscosity and mass sensor for the high-throughput synthesis, screening and characterization of combinatorial libraries Workstation, apparatuses and methods for the high-throughput synthesis, screening and/or characterization of combinatorial libraries. The invention relates to an array, which permits various high-throughput methods for synthesis, screening and/or characte... | 08/05/2003 |
| 6588254 | Rotary rheometer A rotary rheometer having a concentric cylinder control jacket and a sample cup. The sample cup fits snugly inside the control jacket, such that the sample cup is in substantial thermal contact with the control jacket along at least the greater part of th... | 07/08/2003 |
| 6584831 | Fast-recovery viscometer Electrical current driven through one or the other of two coils (20 and 22) draws a ferromagnetic bob (28) along a chamber (26) containing a liquid whose viscosity is to be measured. The current that flows through the coil includes an AC component, and th... | 07/01/2003 |
| 6575020 | Transducer for microfluid handling system The present invention relates to integrated micro-cantilevers, micro-bridges or micro-membranes in micro-liquid handling systems. Such micro-liquid handling systems provide novel detection mechanisms for monitoring the physical, chemical and biological pr... | 06/10/2003 |
