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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7332087 | Flow sensing apparatus used to monitor/provide feedback to a split flow pumping system A method and apparatus for monitoring and controlling the nano-scale flow rate of fluid in the operating flow path of a HPLC system without relying on a nano-scale sensor in the operating flow path. A main flow sensor is disposed in the main flow path between the pu... | 02/19/2008 |
| 7268859 | Liquid measuring system Systems and methods for measuring the flow of a liquid along a conduit are disclosed. A heat source applies thermal energy to a portion of a liquid flowing along a conduit thereby elevating its temperature. A light source generates a first beam that passes through t... | 09/11/2007 |
| 7213741 | Lead wire bonding method After respective one ends of lead wires are fixed to a printed circuit board, the lead wires are bent, the printed circuit board is brought into a case and the other ends of the lead wires are bonded to terminals of the case. Since the lead wires are processed befor... | 05/08/2007 |
| 7186336 | Flow sensing apparatus A method and apparatus for monitoring and controlling the nano-scale flow rate of fluid in the operating flow path of a HPLC system. A first flow sensor is disposed in a first flow path between a first flow-divider and a fluidic tee. A second flow sensor is disposed... | 03/06/2007 |
| 7028544 | Mass flowmeter for measuring by the CT method A mass flowmeter of the thermal type provided with a flow sensor with a flow tube through which a fluid can flow during operation, with a temperature sensor in an upstream position (A) and a heater (H) in a downstream position (B), and power control means and temper... | 04/18/2006 |
| 7000464 | Measuring and control of low fluid flow rates with heated conduit walls The flow of a fluid at low flow rates is measured in a flow sensing assembly and controlled without introducing measuring devices into the fluid flow path. The flow sensing assembly is enclosed in a housing to lessen ambient and fluid temperature change effects on t... | 02/21/2006 |
| 6911894 | Sensor package for harsh environments A sensor can be configured to generally include a flow channel block having a flow channel formed therein, and a sensor chip for sensing fluid flow, wherein a fluid in the flow channel surrounds the sensor chip. Alternatively, the sensor chip can be fastened at one ... | 06/28/2005 |
| 6883369 | Sensor and method of measuring mass flow non-intrusively A non-intrusive sensor for measuring mass flow of a medium flowing through a tube comprises: a probe having a predetermined length disposed along an external wall of the tube; a heater for heating the probe at a first point along the length thereof; a first temperat... | 04/26/2005 |
| 6826955 | Mass fluid flow sensor having an improved housing design A mass fluid flow sensor for determining the amount of fluid inducted into an internal combustion engine, for example, is disclosed. The mass fluid flow sensor includes an external intake fluid temperature element which improves the accuracy of the mass fluid readin... | 12/07/2004 |
| 6782745 | Slosh supressor and heat sink A slosh suppressor prevents damage to electronic components and wire bonds of a circuit module contained in a circuit chamber formed by the housing of a sensor module. The circuit module is positioned within the circuit chamber and has a silicon gel layer positioned... | 08/31/2004 |
| 6639506 | Method and apparatus for sensing and measuring plural physical properties, including temperature A method and device, employing positive-temperature-coefficient material, for sensing plural properties of a fluid, such as temperature and flow rate. Can be used in a wind gauge or in a device for sensing position of mechanical elements such as valve dia... | 10/28/2003 |
| 6571623 | Measuring instrument with rectangular flow channel and sensors for measuring the mass of a flowing medium A measuring instrument for measuring mass of a flowing medium in which a measuring body extends across the flowing medium and has a rectangular flow channel through which the medium flows. The flow channel has a constricted inlet, a central portion with p... | 06/03/2003 |
| 6487904 | Method and sensor for mass flow measurement using probe heat conduction A mass flow sensor is disclosed comprising: a heated probe having a predetermined length for disposition in the path of mass flow; at least two first temperature measuring devices disposed at different points along the probe length for measuring temperatu... | 12/03/2002 |
| 6443003 | Thermoelectric air flow sensor A sensor for measuring changes in mass air flow is described that uses one or more thermoelectric devices, each of which serves both as a heating element and as a differential temperature sensor. The thermoelectric device or devices are sandwiched between... | 09/03/2002 |
| 5970790 | Method and device for measuring flows of fluids, based on temperature-differences between two heat-conducting bodies, one of which contains the fluid-flow Method and device for measuring flows of fluids, such as liquids and gases, flowing through a tube (16). The tube is heat-conducting and is heated at a certain location (18), with the heat on the one hand moving by way of the tube wall (17) in a direction... | 10/26/1999 |
| 5347861 | Thermal mass flow meter The portions on the sides far to each other of two sensor coils wound around the outer circumferential portion of the conduit, through which the fluid passes, at the suitable interval are thermally joined through a thermal conductor and the thermal conduc... | 09/20/1994 |
| 5142907 | Constant temperature gradient fluid mass flow transducer A constant temperature gradient fluid mass flow transducer is described. The upstream and downstream ends of a measuring section of a capillary tube of the transducer are held at respective constant temperatures by separate temperature regulated heat sink... | 09/01/1992 |
| 5036701 | Mass-flow meter with temperature sensors Mass-flow meter with temperature sensors, designed for measuring mass flow rates of liquids or gases, containing a heat conductive tube, through which the mass flow to be measured occurs and of which the beginning and the end are kept at the same temperat... | 08/06/1991 |
| 4972707 | Apparatus for measuring the flow of a fluid Apparatus for measuring the flow of a fluid, comprising a tube through which the fluid to be measured may flow, means for varying the temperature at a selected location of the tube and detectors for measuring the temperature in a place in the flow upstrea... | 11/27/1990 |
| 4815280 | Thermal flow meter A sensor case housing a pair of sensor coils wound around a peripheral surface of a conduit, through which a fluid flows, therein is formed of two block members made of materials superior in heat conductivity, at least one of said block members being prov... | 03/28/1989 |
| 4770037 | Method for determining the flow of a fluid The flow rate of a fluid, e.g. hot water, is determined by measuring the temperature of the fluid and the cooling time between two temperature thresholds of a previously heated probe. On the basis of these values, by way of a first interpolation based on ... | 09/13/1988 |
| 4475387 | High temperature mass flowmeter Apparatus is provided for measuring the flow of high temperature fluid through a main line. A shunt path diverts a portion of the fluid flowing in the main line. The shunt path is so designed as to thermally isolate a flowmeter positioned in the shunt pat... | 10/09/1984 |
| 4270386 | Indirectly heated thermal flowmeter A length of conduit is coupled at its ends to a heat sink. A pair of thermocouples are joined to the conduit at spaced points intermediate the ends of the conduit. A closed loop of heat conductive material contacts the conduit midway between the thermocou... | 06/02/1981 |
| 4245503 | Thermal flowmeter A length of conduit is coupled at its ends to a heat sink. A pair of thermocouples are joined to the conduit at spaced points intermediate the ends of the conduit. A conductive post is connected at one of its ends to the heat sink and its other end is joi... | 01/20/1981 |
| 4107991 | Resistance bridge-type flowmeter Flow of fluid through a heated electrically conductive conduit is measured by detecting changes in resistance of the conduit caused by the flow. A resistance bridge is connected to spaced points along the conduit for performing the measurement.... | 08/22/1978 |
| 4016759 | Fluid flowmeter Apparatus for measuring the flow of fluids by thermal means. A flow meter of the heated conduit type is operated in a constant temperature mode to produce two output signals, one proportional to the differential temperature between two points in the fluid... | 04/12/1977 |
