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Coriolis mass flow meter employing non-metallic flow conduit structure

A Coriolis mass flow meter employing non-metallic flow conduit structure coupled and supported to distribute loads and reduce stresses on the flow conduit structure. The present invention discloses non-metallic flow conduit structures having corrosion-resistance and having suitable service temperature ranges, variation of Young's modulus and range of thermal expansion coefficient. A preferred embodiment includes support structures which distribute the loads on the flow conduit structure and pipe couplings which provide resilient solid mounting.

Mass flow meter and mass flow controller

The output from the sensor detecting the flow rate of the fluid passing through the conduit is compared with the ceiling value and the appointed compensating signal is added to the output from the sensor to display the signal obtained on the basis of this addition result as the value of flow rate or reduce the openness of the control valve on the basis of the above described signal when the output from the sensor is larger than the threshold value, so that the mass flow meter can accurately display the flow rate even when the fluid passes in an excessive flow rate. In addition, even though the mass flow meter and the mass flow controller are fallen into the abnormal operating condition due to an excessive flow rate of fluid, they can be quickly returned to the normal operating condition.

Electromagnetic flow meter

An electromagnetic flow meter consists of a metering tube made of an electrically non-conductive material and having a thick outer wall. The tube has at least two measuring electrodes and at least two magnetic poles, each of which is disposed in a blind bore of the tube. The poles are linked to one another by a yoke fitted with a magnetic coil. To achieve greater measuring precision both the yoke and the magnetic coils are mounted in a recess inside the outer surface of the metering tube. The recesses are in the form of through holes and grooves. When fully assembled all magnet components are disposed inside the outer surface of the metering tube.

Coriolis mass flow meter adapted for low flow rates

A Coriolis mass flow meter of the type including a continuous flexible flow tube fixedly mounted at its ends and adapted for receiving fluid flow. A driver oscillates the flow tube at a fixed frequency. A drive brace is attached at one end to the flow tube mount and at the opposite end to the flow tube substantially at the position of the applied oscillation of the driver. The brace limits the displacement of the flow tube transverse to the direction of the applied oscillation without substantially restricting the motion of the flow tube due to the Coriolis reaction of the fluid to the driver oscillation. The mounting of the flow tube being made by the engagement of gripping portions having bushings therein. The mount limiting transfer of forces acting on the inlet and outlet ends of the flow tube. Resonant pins are provided at each end of the flow tube adjacent the fixed mounting to resiliently clamp the flow tube and fix the resonant frequency thereof throughout its useful life. The Coriolis reaction of the fluid being measured by sensors so as to determine the mass flow rate of the fluid.


Retrievable downhole flow meter
Capacitative electromagnetic flow meter
Ultrasonic flow meter with reduced noise
Coriolis mass flow meter having a thick-walled measuring tube
Detector for an ultrasonic flow meter
Karman vortex flow meter
Coriolis mass flow meter employing non-metallic flow conduit structure
Fluidic volumetric fluid flow meter
Electromagnetic flow meter
Fluid flow meter utilizing pressure sensing
Air flow meter
Fluid flow meter
Liquid flow meter construction
Positive displacement flow meter method and apparatus
Magnetic-inductive flow meter with a measuring tube made of plastic


PAT. NO. Title
301 5157975 Coriolis mass flow meter employing non-metallic flow conduit structure
302 5141021 Mass flow meter and mass flow controller
303 5121640 Electromagnetic flow meter
304 5115683 Coriolis mass flow meter adapted for low flow rates
305 5115682 Coronary artery graft flow-meter
306 5115635 Analytical flow meter backup
307 5111825 Ultrasonic Doppler flow meter
308 5107466 Ultrasonic doppler flow meter
309 5095761 Coriolis-type mass flow meter for sanitary use
310 5088322 Extended range flow meter
311 5073208 Method for cryogenic treatment of Coriolis mass flow meter structures
312 5069075 Mass flow meter working on the coriolis principle
313 5069067 Fluid flow meter
314 5062305 Method of making a measuring tube for an electromagnetic flow meter, and the measuring tube
315 5051920 Flow-meter data collection and processing system
316 5048349 Coriolis-type mass flow meter comprising at least two straight parallel vibrating tubes
317 5048332 Flow meter for measuring fluid flow with multiple temperature sensors
318 5048327 Mass air flow meter
319 5046370 Flow meter with improved turbine blades
320 5045963 Protective circuit for the induction coil of a magnetically inductive flow meter
321 5038773 Flow meter system
322 5038621 Variable area obstruction gas flow meter
323 5038620 Coriolis mass flow meter
324 5036702 Air flow meter with compensation of second stage delay of thermal inertia
325 5036701 Mass-flow meter with temperature sensors
326 5033312 Gas flow meter housing
327 5031468 Flow meter working on the Coriolis principle (III)
328 5027662 Accuracy mass flow meter with asymmetry and viscous damping compensation
329 5020375 Flow meter working on the Coriolis principle (II)
330 5020373 Composite flow meter
331 5020214 Method of manufacturing a hot wire air flow meter
332 5018391 Inductive flow meter
333 5016187 Linearized turbine flow meter for fuel dispensers
334 5012449 Sonic flow meter
335 5000041 Control apparatus for turbine-type flow meter
336 4993365 Flow rate meter and automatic animal feeder installation employing such flow meter
337 4991560 Hot-wire air flow meter and internal combustion engine provided with same
338 4989456 Variable area obstruction gas flow meter
339 4986133 Flow meter
340 4986116 Air flow meter for internal combustion engine
341 4986115 Hot-wire air flow meter
342 4977781 Vortex flow meter
343 4976153 Karman vortex flow meter
344 4974445 Hot wire type of air flow meter and internal combustion engine using the same
345 4972722 Magnetic inductive flow meter
346 4972708 Thermal mass flow-meter particularly for gases
347 4970902 Karman's vortex flow meter
348 4967788 Water flow meter resetter
349 4958524 Flow meter
350 4953403 Positive displacement flushable flow meter

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