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| Number | Title | Issue Date |
| 7856874 | Apparatus and method for measuring a fluid flow-rate within a capillary An apparatus for measuring a fluid microflow velocity within a capillary conduit, comprises: a) at least one thermoelectric cooler having a heating and a cooling surface, said heating surface being suitable for heating a fluid flowing over it and said cooling surfac... | 12/28/2010 |
| 7321833 | Fluid flow rate sensor A valve body defines an inlet, an outlet, a valving cavity disposed between the inlet and outlet and a valving surface between the inlet and the outlet. A valve is moveable to a position away from the valving surface for permitting flow from the inlet through the va... | 01/22/2008 |
| 7240547 | Method and apparatus for measuring fluid properties A method of measuring fluid properties such as flow velocity, flow rate, and fluid composition comprises positioning a heat exchange element with a temperature sensor, such as an optical fiber temperature sensor, arranged centrally inside the element in thermal cont... | 07/10/2007 |
| 7228733 | Fluid detection device One or a plurality of branch paths (3) having opening end portions (2) formed in the vicinity of an inner wall surface of a main path (1) through which a fluid flows so as to point the upstream or downstream side of the main path, and causing pa... | 06/12/2007 |
| 7134321 | Fluid gauge proximity sensor and method of operating same using a modulated fluid flow A system and method that use a fluid gauge proximity sensor. A source of modulated unidirectional or alternating fluid flow travels along at least one path having a nozzle and a flow or pressure sensor. The fluid exists at a gap between the nozzle and a target. The ... | 11/14/2006 |
| 7059185 | System and method of measuring convection induced impedance gradients to determine liquid flow rates A method and system for measuring the flow rate of a liquid or gas within a flow channel utilizing a centrally located excitation source and a plurality of sensors. The excitation source is comprised of a heating element coupled with an alternating current generator... | 06/13/2006 |
| 6962077 | System and method of measuring convection induced impedance gradients to determine liquid flow rates A method and system for measuring the flow rate of a liquid or gas within a flow channel utilizing a centrally located excitation source and a plurality of sensor means. Said excitation means is comprised of a heating element coupled with an alternating current gene... | 11/08/2005 |
| 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 |
| 6826954 | Method and apparatus for flow measurement A method and apparatus is disclosed for measuring the flow of fluid in the conduit, giving the example of oil in a well bore (12). A heat exchanger such as a cooling station (66) is placed in the well bore (12) and caused to create a slug of coo... | 12/07/2004 |
| 6681624 | Thermal flowmeter with fluid descriminant function A thermal flowmeter is provided with a flow rate detecting unit (4) containing a heating element, a flow rate detecting temperature sensing element and a flow rate detecting electroconductive fin plate (44) extending into a fluid flow passage (3), which a... | 01/27/2004 |
| 5861555 | Method and apparatus for measuring the flow differential in a dialysis machine, and method for calibrating the apparatus Methods for measuring the flow differential through a dialysis machine are disclosed in which the dialysis machine includes a heat exchanger having a primary side and a secondary side for exchanging heat therebetween. The method includes measuring the tem... | 01/19/1999 |
| 5714685 | Method and apparatus for measuring the flow differential in a dialysis machine Methods for measuring the flow differential through a dialysis machine are disclosed in which the dialysis machine includes a heat exchanger having a primary side and a secondary side for exchanging heat therebetween. The method includes measuring the tem... | 02/03/1998 |
| 5691702 | Pneumatic pressure detector for fire and ground fault detection Electrical circuitry associated with a pneumatic pressure detector for use in an overheat condition or fire alarm system for aircraft. The pressure detector comprises a plenum situated between a pair of deformable diaphragms and pressurized by a capillary... | 11/25/1997 |
| 5402111 | Simplified fluid flow detector The invention detects the presence of a liquid or liquid flow, and it is used to control pumping of a well when the quantity of liquid being discharged by the pump per stroke is much less than the volumetric displacement of the pump. A fluid flow detector... | 03/28/1995 |
| 4730623 | Cardiac output estimation method and apparatus Thermocouple pairs measure the temperatures at a cold-fluid injection point and a downstream point. The reference thermocouple of each pair sees the temperature of a thermally floating heat sink of unknown temperature that has high thermal conductivity an... | 03/15/1988 |
| 4704904 | High temperature gas flow meter A high temperature gas meter provides a liquid injection means, at least one temperature sensing means located upstream from the liquid injection means and a liquid flow measuring means. Alternatively, a second temperature sensing means may be employed do... | 11/10/1987 |
| 4538925 | Thermal power measuring device The invention discloses a device for measuring thermal power without using movable and wearable elements, which is also appropriate for small flow of thermal power. The device measures the thermal power by means of temperature differences only and is appl... | 09/03/1985 |
| 4484471 | Flow meters A meter for measuring the rate of flow of a fluid comprises an inlet and outlet for the fluid, a surface intermediate of said inlet and outlet over which the fluid will flow in passing from inlet to outlet, a second surface maintained at a different tempe... | 11/27/1984 |
| 4415279 | Method and a meter for measuring quantities of heat A method and a meter for measuring the quantity of heat abstracted from a circulating flow of liquid by a consumption unit. Indirect measurement of the volume flow rate of the liquid is made, while maintaining a sub heat flow (Q shunt) from or to the main... | 11/15/1983 |
| 4355908 | Device for measuring the mass flow and the heat flow and method for determining the mass flow To measure the heat flow and the mass flow in a conveying system for fluids, a device is used which consists of (i) two fluid-carrying tubes, one mounted in the feed line and one in the return line, (ii) a heat-conducting section between these two tubes a... | 10/26/1982 |
| 4326539 | Process for measuring the cardiac volume The invention relates to a process for the measurement of cardiac volumes of the beating heart, in pulsed flow conditions, by means of a tracer injected upstream of or in the ventricle at a controlled injection flow Di during a controlled injec... | 04/27/1982 |
| 4275601 | Solids mass flow determination Method and apparatus for determining the mass flow rate of solids mixed with a transport fluid to form a flowing mixture. A temperature differential is established between the solids and fluid. The temperature of the transport fluid prior to mixing, the t... | 06/30/1981 |
| 4259968 | Bipolar fluid measuring apparatus In a spirometer, a breath transmission passage has first and second ends open to the atmosphere and a given cross-sectional area. A patient breathes through the breath transmission passage bidirectionally. An elongated conduit has a first port at one end,... | 04/07/1981 |
| 4236527 | Cardiac output detection by multiple frequency thermodilution Method and apparatus for measuring cardiac output in which a traceable signal in the form of thermal energy or an injectate is applied to the blood flow through the heart having a plurality of frequency components with the traceable signal detected at a h... | 12/02/1980 |
| 4153048 | Thermodilution catheter and method A new and improved pigtail type catheter and method particularly suited for the local thermodilution technique for determination of venous blood flow. The fluid injection aperture is disposed in the pigtail portion adjacent the most forward extending area... | 05/08/1979 |
| 4105022 | Method of determining cardiac output by thermodilution principles and utilization of a catheter assembly A method for determining cardiac output by use of thermodilution principles and by utilizing a catheter assembly with a passageway therethrough. The catheter assembly is introduced at least into close proximity to the right heart. A small balloon tipped c... | 08/08/1978 |
| 4004576 | Direct indicator device for determining the cardiac output flow rate according to the thermodilution method A direct indicator device for determining the cardiac output according to the thermodilution method embodying two temperature sensors connected to the blood circulation for respectively determining the inlet- and dilution temperatures. A clock generator a... | 01/25/1977 |
| 3987788 | System for computing cardiac flow rates from thermodilution measurements A thermistor is used to sense the temperature of blood at a location downstream of a point at which a small quantity of liquid (indicator) having a temperature lower than the blood is introduced. Circuitry is used to compute the flow measurement from the ... | 10/26/1976 |
