| Patents for G01F 1 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow (42,661) |
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| 09/03/1991 | CA1288257C Through hole construction for process measuring devices |
| 08/29/1991 | DE4006085A1 Heated solid state gas flow sensor combining compsn. measurement - by integration of reacting layer and heating track on the same substrate using thick-thin film techniques |
| 08/28/1991 | EP0443837A2 Method and apparatus for beverage blending and proportioning |
| 08/28/1991 | EP0443650A1 Method and apparatus for determining air mass in a crankcase scavenged two-stroke engine |
| 08/28/1991 | CN2083743U Photoelectric flow rate transducer |
| 08/28/1991 | CN2083742U Elbow tube ink drop instrument |
| 08/28/1991 | CN1013707B Electromagnetic flow meter |
| 08/27/1991 | US5043706 System and method for detecting bubbles in a flowing fluid |
| 08/27/1991 | US5042531 Energized seal for orifice plate |
| 08/24/1991 | CA2029070A1 Method and means for determining air mass in a crankcase scavenged two-stroke engine |
| 08/22/1991 | WO1991012496A1 Air flow sensor |
| 08/22/1991 | DE4102920A1 Vortex frequency measuring device - for vortex detachment flowmeter, with frequency sensor in vortex zone, and resistive layer with passage openings |
| 08/22/1991 | DE4004513A1 Computer-controlled volumetric electric heater of flowing liq. - involves calculation of rate of flow from measurements of energy consumption and temp. difference across element |
| 08/21/1991 | EP0442188A1 Downhole doppler flowmeter |
| 08/21/1991 | EP0441849A1 Process and device for withdrawing liquid samples from a flow line |
| 08/21/1991 | CN1053931A Checking system for measuring quantity of coal powder blowing through tuyeres of bleast furnace |
| 08/20/1991 | US5040422 Procedure for flow measurement and equipment therefor |
| 08/20/1991 | US5040416 Electrical current flow sensor |
| 08/20/1991 | US5040415 Nonintrusive flow sensing system |
| 08/14/1991 | EP0441531A2 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 08/14/1991 | EP0441523A1 Air flow rate measuring device for an internal combustion engine |
| 08/14/1991 | EP0441328A1 Perfected differential flowmeter |
| 08/14/1991 | EP0440867A1 Ultrasonic flow measuring device |
| 08/14/1991 | EP0440796A1 Ultrasonic diagnostic apparatus |
| 08/14/1991 | EP0303621A4 Coriolis-type mass flowmeter |
| 08/13/1991 | US5038773 Flow meter system |
| 08/13/1991 | US5038621 Variable area obstruction gas flow meter |
| 08/13/1991 | US5038620 Coriolis mass flow meter |
| 08/13/1991 | US5038610 Anemometer |
| 08/13/1991 | US5038609 Thermal type flow detecting apparatus |
| 08/13/1991 | CA1287502C Symmetrical bridge circuit for measuring mass air flow |
| 08/07/1991 | EP0440320A1 Pumping system |
| 08/07/1991 | EP0440155A2 Flow-velocity sensor probe |
| 08/07/1991 | EP0439839A1 Ultrasound calibrator |
| 08/07/1991 | EP0140970B1 Method and apparatus for measuring flow in a pipe or conduit |
| 08/07/1991 | CN2082403U Water discharge microcomputer monitoring instrument |
| 08/06/1991 | US5036884 Mounting means for fluid pressure transmitters |
| 08/06/1991 | US5036883 Valve and arrangement for fire suppression water sprinkler system |
| 08/06/1991 | US5036712 Inertia force flowmeter |
| 08/06/1991 | US5036711 Averaging pitot tube |
| 08/06/1991 | US5036710 Multi-phase flowmeter |
| 08/06/1991 | US5036702 Air flow meter with compensation of second stage delay of thermal inertia |
| 08/06/1991 | US5036701 Mass-flow meter with temperature sensors |
| 07/31/1991 | EP0439070A1 Automatic power generation type flowmeter |
| 07/31/1991 | EP0438431A1 System for regulating the temperature of a resistance. |
| 07/31/1991 | CN1053493A Mass flowmeter |
| 07/31/1991 | CN1013403B Turbine flowmeter |
| 07/30/1991 | USRE33649 Butterfly valve having a function for measuring a flow rate and method of measuring a flow rate with a butterfly valve |
| 07/30/1991 | US5036240 Impulse sensor with mechanical preamplification and noise cancellation |
| 07/30/1991 | US5035147 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 07/30/1991 | US5035146 Method and apparatus for determining steam quality and/or flow rate from impact force and flow restriction data |
| 07/30/1991 | US5035139 Process and a device for carrying out measurements at a foaming liquid |
| 07/30/1991 | US5035138 Mass flow sensor having wide dynamic range |
| 07/25/1991 | WO1991011731A2 Inductive flow meter |
| 07/25/1991 | WO1991010882A1 Mass-volume vortex flowmeter |
| 07/25/1991 | WO1991009283A3 Linearization of a sensing bridge circuit output |
| 07/25/1991 | WO1991008843A3 Ultrasonic transducer for measuring air flow, in particular for measuring the air mass in internal combustion engines |
| 07/25/1991 | DE4002030A1 Induktiver durchflussmesser Inductive flow meters |
| 07/25/1991 | CA2053280A1 Inductive flow meter |
| 07/24/1991 | WO1991011140A1 Ventilatory instrument for measuring peak expiratory flow |
| 07/24/1991 | EP0437872A2 Method and system for measurement of fluid flow in a drilling rig return line |
| 07/23/1991 | US5033585 Device for controlling lubricant flow |
| 07/23/1991 | US5033313 Inertia force flowmeter |
| 07/23/1991 | US5033312 Gas flow meter housing |
| 07/23/1991 | US5033311 Volumetric fluid flow sensor |
| 07/23/1991 | US5033310 Manhole cover inflow test device |
| 07/23/1991 | US5033299 Flow sensor |
| 07/20/1991 | CA2034240A1 Mass-volume vortex flowmeter |
| 07/18/1991 | DE4001114A1 Liquid manure applying system for farmland - uses metering device with solids depositor connected into pressure line between tanks pump and distributor head |
| 07/18/1991 | DE4001113A1 Sewage distributor for fertilisation purposes - contains bucket wheel for measurement device associated with housing inlet |
| 07/17/1991 | EP0436588A1 Low stress polysilicon microstructures. |
| 07/17/1991 | EP0436546A1 Dusting apparatus. |
| 07/17/1991 | EP0333784A4 Convective inertia force flowmeter |
| 07/17/1991 | CN2081082U Flow tester for capillary tube of cold-producing medium |
| 07/17/1991 | CN2081081U Gas flowmeter |
| 07/16/1991 | US5031468 Flow meter working on the Coriolis principle (III) |
| 07/16/1991 | US5031467 Pulse echo technique for detecting fluid flow |
| 07/16/1991 | US5031466 Method and apparatus for determining steam quality and mass flow rate |
| 07/16/1991 | US5031465 Steam quality and mass flow rate measurement using critical flow choke upstream of an orifice plate |
| 07/16/1991 | CA1286392C Surface acoustic wave gas flow rate sensor with self- heating feature |
| 07/11/1991 | WO1991010114A1 Piezoelectric differential pressure vortex sensor |
| 07/11/1991 | DE4025952A1 Flow speed measurement appts. for phase flows in pipe system - using pairs of transducers with opposite phase voltages opposed by sensor electrode |
| 07/10/1991 | EP0224569B1 Family of aerodynamically compensated multiple static pressure tubes |
| 07/10/1991 | CN1052943A Method of measuring mass flow of coal powder in delivering pipe and device thereof |
| 07/10/1991 | CN1052942A Measuring method of two-phase fluid flow |
| 07/09/1991 | US5031126 Constant power thermal sensor |
| 07/09/1991 | US5030479 Method for producing an air flow rate meter substrate |
| 07/09/1991 | US5029482 Gas/liquid flow measurement using coriolis-based flow meters |
| 07/09/1991 | US5029465 Vortex flowmeter |
| 07/04/1991 | DE4017022A1 Ultrasonic received signal insertion point definition circuit - examines RAM contents with regard to signal period and corrects cycle length value |
| 07/03/1991 | EP0406426A4 Device for automatically measuring the quantity of milk extracted by milking installation |
| 07/02/1991 | US5028214 Flow metering device for controlling the displacement of a variable capacity pump by detecting the flow rate |
| 07/02/1991 | US5027662 Accuracy mass flow meter with asymmetry and viscous damping compensation |
| 07/02/1991 | US5027661 Liquid flow metering |
| 07/02/1991 | US5027652 Ceramic with opeining and foil covering |
| 06/27/1991 | WO1991009284A1 Ultrasonic mass flow meter |
| 06/27/1991 | WO1991009282A1 Ultrasonic gas/liquid flow meter |
| 06/27/1991 | WO1991008843A2 Ultrasonic transducer for measuring air flow, in particular for measuring the air mass in internal combustion engines |
| 06/27/1991 | DE3941981A1 Flowmeter for vertical measurement flows - has float permanently magnetic coaxial to cylindrical symmetry axis and magnetic field sensitive elements along tube exterior |
| 06/26/1991 | EP0434399A1 Peripheral arterial monitoring instruments |