Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7797986 | Magnetic fluid particulate separation process A fluid tester includes an inlet for a fluid path, an ionization chamber defining at least part of the fluid path located downstream from the inlet, a charge chamber configured to subject a fluid to an electric field defining at least part of the fluid path located ... | 09/21/2010 |
| 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 |
| 7327136 | Magnetic taggant system An apparatus and a method for monitoring a ratio of at least two components being mixed use sensors detecting ferrous taggant particles in the component(s) and the mixture. The sensors include an annular drive coil positioned between inner and outer annular sense co... | 02/05/2008 |
| 7299683 | Metal particle sensor system A metal particle sensor system for detecting metal particles in an oil line. The metal particle sensor system may include a metal particle sensor positioned about the line, an orifice positioned within the line and downstream of the metal particle sensor, a first pr... | 11/27/2007 |
| 7275418 | Method for the quantitative detection of two contaminants in a fluid The quantitative determination of two contaminants of a fluid is carried out in the following steps: detection of permittivity ε and viscosity v of the fluid; determination of the quantity of the first contaminant 11e on the basis of a difference betw... | 10/02/2007 |
| 7148678 | Magnetic taggant system An apparatus and a method for monitoring a ratio of at least two components being mixed uses sensors detecting ferrous taggant particles in the component(s) and the mixture. The sensors include an annular drive coil positioned between inner and outer annular sense c... | 12/12/2006 |
| 7075293 | Method for inductive distance measurement, and a working head for carrying out this method using an induction coil An inductive measurement is carried out of the distance between a workpiece (3) and a working head (1), which bears an induction coil (8), through which an alternating current flows and which is part of a resonance circuit whose oscillation freq... | 07/11/2006 |
| 6976558 | Method and system for performing gearbox final assembly clean check A clean check is performed on a gearbox by flushing an oil-based fluid through the gearbox and then through a filter. The filter is then weighed to determine the weight of contaminants collected in the filter. The contaminant weight is compared to a predetermined le... | 12/20/2005 |
| 6966994 | Contamination control for engines A method is provided of detecting contamination of engine fluid in an engine. Engine fluid is provided to a particle counter, and the cleanliness of the engine fluid is measured with the particle counter during operation of the engine. ... | 11/22/2005 |
| 6928861 | Method for a reliability assessment, failure prediction and operating condition determination of electric equipment The present invention is directed to a method for analyzing the maintenance status of liquid-filled electric equipment. An accurate indication of the maintenance state of an electric device and its insulating liquid is obtained using an analysis method comprising a ... | 08/16/2005 |
| 6895808 | Method and device for machine diagnosis, especially for transmission diagnosis The present invention concerns a method and a device for machine diagnosis and, in particular, for transmission diagnosis in a machine or motor vehicle. The measurement system, according to the invention, comprises a coil (2) wound on a coil core (11),... | 05/24/2005 |
| 6788072 | Apparatus and method for sensing particle accumulation in a medium A method and apparatus for detecting an accumulation of particles with a medium such as the soot content in diesel engine oil including generating a first waveform at a first frequency and a first voltage level to produce a standing wave having a voltage null point ... | 09/07/2004 |
| 6691557 | Analysis method for liquid-filled electric equipment The present invention is directed to a method for analyzing the maintenance status of liquid-filled electric equipment. An accurate indication of the maintenance state of an electric device and its insulating liquid is obtained using an analysis method co... | 02/17/2004 |
| 6598464 | Oil and contaminants analyzer A process, a method and apparatus are provided for testing and analyzing oil's physical and chemical characteristics and contaminants found in oil. A process separates contaminants prior to testing of oil's chemical and physical characteristics and includ... | 07/29/2003 |
| 6525334 | System and method for detecting erosion caused by particles in a fluid An abrasive particle detention system includes a fluid circulation system, a probe assembly, a monitoring circuit, and an operator indicator. The probe assembly includes an orifice from which a stream of fluid emerges, and a probe having a face upon which... | 02/25/2003 |
| 6365413 | Thin film thermal oxidative oil deposit testing device and method Thin film thermal oxidative engine oil or other oleaginous liquid deposit device has an oleaginous test liquid placement volume; a heatable depositor surface in liquid communication with the volume; a supply for at least one of an oxidant and another subs... | 04/02/2002 |
| 6051970 | System and method for measuring the magnetic conductive properties of a test fluid The magnetic or conductive properties of a test fluid, or of particles within a test fluid, are measured by an apparatus comprising a solenoidal coil (1a), a magnetic field carrying means (23) disposed radially outside the solenoidal coil, a tubular elect... | 04/18/2000 |
| 5968371 | Lubricant circulation diagnostic and modeling system A lubricant filtering and monitoring system and method is provided for a lubricant circulation system circulating lubricant through a filter to a lubricated component. A combination of sensors senses a condition of the lubricant before and after passage t... | 10/19/1999 |
| 5918272 | Magnetic and ultrasonic discriminator for particle size distribution analyzer A flow-through system for determining the particle size distribution of iron oxide particulate matter in a reactor water sample. The system includes a magnetic filter having a chamber through which a stream of reactor water. The chamber is surrounded by a... | 06/29/1999 |
| 5907108 | Continuous sampling and dilution system and method A system and method for the automatic sampling and dilution of homogeneous particle dispersions is developed that uses a multistep parallel dilution network system for the sample and diluent and includes variable dilution capabilities. The sample and dilu... | 05/25/1999 |
| 5889200 | Tandem technique for fluid monitoring The present invention relates to a method and apparatus which can be used to detect the abnormal operating condition of equipment, such as engines and machinery, the usefulness of the fluid, and the content of wear metals and elemental constituents in the... | 03/30/1999 |
| 5852404 | Apparatus for the detection and identification of metal particles, coolant or water in engine oil or hydraulic fluid An apparatus for the detection and identification of metal particles, coolant or water in engine oil or hydraulic fluid. The apparatus comprising means for generating a high frequency oscillating field within the fluid, means for generating an electric fi... | 12/22/1998 |
| 5811664 | Debris monitoring A sensor for use in machine wear debris monitoring transducers which detect metallic particles present in a flow of fluid, such as lubricating oil. The sensor comprises an inductive coil having a plurality of turns for surrounding a non-magnetic conduit. ... | 09/22/1998 |
| 5710373 | Visual comparator with test chart and method for evaluating contamination of washing fluids A visual comparator for use in evaluating the nature and extent of contamination in a solvent used for cleaning mechanical parts. The comparator comprises an opaque frame, and an array of viewing apertures is formed in the frame. Each of said apertures is... | 01/20/1998 |
| 5646539 | Multi-purpose capacitive sensor An apparatus for sensing two parameters of a hydraulic system having a hydraulic line includes a pair of electrodes contained within the line and oppositely spaced, forming a capacitor. The apparatus alternately produces first and second charging currents... | 07/08/1997 |
| 5614830 | Oil monitor with magnetic field A method and apparatus for detecting the degree of deterioration in lubricating oil including a grid-like capacitive sensor, that uses the lubricating oil as a dielectric medium, and a magnetic field imposed upon the oil to attract ferromagnetic wear part... | 03/25/1997 |
| 5583441 | Method and apparatus for automatically verifying faults and monitoring chips in a chip detection circuit A chip detector is an open circuit device that attract metal chips circulating throughout a piece of equipment such as a transmission. If a chip closes the circuit in the chip detector, then it is subjected to a first pulse of energy in an attempt to burn... | 12/10/1996 |
| 5540089 | Ferrous particle collection apparatus An apparatus and a method to remove and collect ferrous particles from a fluid for ferrous particle analysis. In one embodiment, the apparatus includes a holder chamber and a removable examination slide within the chamber. A magnet induces a magnetic fiel... | 07/30/1996 |
| 5506501 | Method and apparatus for aiding machine oil analysis A method and apparatus is provided to prepare samples of viscous industrial fluids such as machine lubrication oil for analysis for the presence of magnetically responsive particles and other suspended solids. A test sample of the fluid is held in non-mag... | 04/09/1996 |
| 5472064 | Total fluid exchange system for automatic transmissions A system for providing total fluid exchange for an automatic transmission which interconnects with the transmission's opened cooling circuit to deliver new, fresh fluid to the transmission while simultaneously extracting the spent, used fluid. The system ... | 12/05/1995 |
| 5456102 | Method and apparatus for particle counting and counter calibration A system for counting particles entrained in a flowing fluid and for automatically calibrating the counting system is disclosed. A conduct through which a fluid carrying particles flows has a transparent section. A narrow light beam, such as a laser light... | 10/10/1995 |
| 5420040 | Method for the measurement of precipitation of asphaltene in oil The invention provides a method and an apparatus for measuring asphaltene precipitation in a petroleum product. The inventive method quantifies the precipitation by measuring changes in the petroleum product's conductivity or capacitance. The inventive ap... | 05/30/1995 |
| 5401661 | Thermo-oxidation engine oil simulation testing A method for testing engine lubricating oil under simulated engine operating conditions including a tank with an interior space containing a quantity of engine lubricating oil, an elongated tubular enclosure for passing oil from one end to the other, and ... | 03/28/1995 |
| 5110429 | Method and arrangement for diagnostics of friction systems of motors A method for diagnosing friction systems involves the partial transfer of metallic microparticles dispersed in lubricant into a solution to be analyzed. The sample is turned alkaline, and after introduction of an electrode system, the dependence of curren... | 05/05/1992 |
| 5064530 | Fluid contamination detecting apparatus Fluid reservoirs are often provided with a means by which the severity of fluid contamination may be monitored. One method of checking the condition of the fluid, requires the disassembly or removal of one or more components from the associated reservoir ... | 11/12/1991 |
| 5061364 | Diagnostic filter for detecting conductive and semiconductive particles in a fluid stream A diagnostic filter device for monitoring electrically conductive and semiconductive particles entrained by a fluid, composed of: a filter element (4) disposed to receive the fluid and to permit passage of the fluid while retaining particles entrained in the f... | 10/29/1991 |
| 5000034 | Short-term engine oil sludge test A short-term test procedure for comparing the engine sludge performance of different engine oils to a reference oil. The test procedure involves establishing a base line by operating one or more engines on the reference oil while maintaining a substantial... | 03/19/1991 |
| 5001424 | Apparatus for measuring magnetic particles suspended in a fluid based on fluctuations in an induced voltage An apparatus for detecting magnetic particles suspended in a liquid, such as particles suspended in lubricating oil flowing through an engine. The oil is caused to pass through the area coupling two or more coils while the mutual inductance of the coils i... | 03/19/1991 |
| 4966032 | Instrument for testing lubricating oil An instrument for testing the lubricating ability of a lubricating oil has a base member having a contact surface to be submerged in the oil, a vibration member having a friction portion pressed against the contact surface, a driving device having a drivi... | 10/30/1990 |
| 4909081 | Systems for detecting magnetic particles in fluids An apparatus for detecting the presence of magnetic particles in a fluid is described. The apparatus uses a magnet which is mounted so that its field is transverse to the fluid flow, so that the magnetic field imparts a transverse velocity to any magnetic... | 03/20/1990 |
