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Liquid flow meter construction

A liquid flow meter comprises a housing having a cylindrical piston chamber and a control chamber. A measuring piston is movable in the piston chamber and a flow control slider is movable in the control chamber and it has respective oppositely directed control surfaces which are made effective, by the flow of liquid between the inlet to the housing and a communication between the measuring piston chamber and the control chamber to move the control slider in a control direction. At each end position of the slider, there is a magnetic holding device for holding the slider until a predetermined control pressure is brought to bear against it to move it in an opposite direction. At each limit of its movement, the piston engages and charges an energy or power storage device operable to accelerate its movement in the opposite direction. The control movements of the slider for regulating the flow between the inlet and the outlet are varied in accordance with the position of the measuring piston.

Rate-of-flow meter, particularly for diagnostic spirometry

A rate-of-flow meter, particularly for diagnostic spirometry, comprises a flow tube containing, on diametrically opposite sides, a measuring stud provided with pressure taps and a displacement body facing the stud.

Linear response flow meter

A fluid flow meter of the variable area flow passage type is provided wherein the variation in said flow passage area is effected by the vertical displacement of a control boundary which is supported by a substantially horizontal annular diaphragm element. Said control boundary is shaped and sized so that the overall displacement required for the flow rate range desired is within the stroke capacity delivered by the total, up and down, free flexing action of said diaphragm element, thereby achieving substantially constant differential pressure operation at a very reasonable value which is due almost entirely to gravity. The resulting unit is very compact and stable and is characterized by very smooth linear response between vertical displacement and fluid flow rate. Said vertical displacement can be measured by various means but is preferably transduced to an equally linear, smooth and steady electrical signal by a direct connection with a specially adapted differential transformer.

Magnetic-inductive flow meter with a measuring tube made of plastic

The present invention relates to a magnetic-inductive flow meter with a measuring tube, which can be fitted into a pipeline system by using connecting means, with at least two measuring electrodes that are fitted into the wall of the measuring tube opposite each other in an electrically isolated manner and are intended for sensing a measuring voltage, a magnet unit, which is likewise arranged on the outside of the measuring tube, generating a magnetic field that is aligned substantially perpendicularly in relation to the direction of flow of the conductive flow medium to be measured. In order to provide here a magnetic-inductive flow meter for low-pressure applications which can be easily produced and can also be easily fitted into a pipeline system, it is proposed here according to the invention that the the measuring tube (1) is produced from a semifinished tube made of high-density polyethylene (HDPE), which can be fitted into the pipeline system (2) without any flanges.


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


601 4055084 Liquid flow meter construction
602 4047521 Rate-of-flow meter, particularly for diagnostic spirometry
603 4041758 Linear response flow meter
604 4028938 Acoustical flow meter
605 4026148 Water flow meter
606 4022061 Centroid target flow meter
607 4020689 Flow meter
608 4014211 Ultrasonic flow meter
609 4012956 Flow meter
610 4006634 Flow meter
611 3985029 Variable restriction fuel flow meter
612 3981194 Flow meter system
613 3979957 Flow meter
614 3979956 Low pressure loss fluid flow meter
615 3979953 Mass flow meter for cryogenic fluid
616 3971253 Flow meter with a magnetic field-dependent resistor arrangement
617 3969940 Fluid flow meter
618 3969939 Temperature compensator for gas flow meter
619 3965739 Flow meter
620 3964310 Linear response flow meter
621 3954009 Flow meter
622 3950990 Bulk flow meter
623 3948099 Flow meter having self-centering rotor assembly
624 3943765 Electromagnetic flow meter
625 3939710 Liquid flow meter
626 3939406 Microwave fluid flow meter
627 3938384 Mass flow meter with reduced attitude sensitivity
628 3934473 Fluid flow meter with counter rotating turbine impellers
629 20060169054 Magnetic-inductive flow meter with a measuring tube made of plastic
630 20060156829 Ultrasonic flow meter including turbulators
631 20060156828 Ultrasonic flow meter including guide elements
632 20060150746 Magnetic-inductive flow meter with an electrically isolated measuring tube
633 20060144160 Inductive flow meter for electrically conductive liquids
634 20060144136 Determination of amount of proppant added to a fracture fluid using a coriolis flow meter
635 20060112772 Flow meter
636 20060110560 Coriolis mass flow meter and method for manufacturing a measuring tube for a coriolis mass flow meter
637 20060081067 Method for operating and/or reviewing a magneto-inductive flow meter
638 20060070437 Gasket arrangement for sanitary process flow meter
639 20060058698 Peak expiratiory flow meter capable of measuring continuous expiratory flow signal
640 20060053911 Immersible thermal mass flow meter
641 20060042399 Fluid mass flow meter device
642 20060037390 Thermal type air flow meter
643 20060032316 Electromagnetic flow meter
644 20060010991 Liner for a flow meter
645 20060010975 Sensor carrier for a flow meter
646 20050284236 Software correction method and apparatus for a variable orifice flow meter
647 20050284235 Software correction method and apparatus for a variable orifice flow meter
648 20050283329 NULLIFICATION OF MEASUREMENT ERROR, PARTICULARLY WITHIN A DUAL TURBINE FLOW METER USED IN A FUEL DISPENSER
649 20050268711 Heating resistor type air flow meter
650 20050252307 Flow meter device

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