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7130750 |
Flow meter with magnetoresistive sensors and method of measuring flow
A variable area flow meter has a magnet carried by a piston which is moved to a position representing fluid flow. An array of magnetoresistive bridge sensors adjacent the path of magnet movement...
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6210565 |
Hydraulic filter head-mounted flowmeter
A device and method for monitoring a fluid characteristic, such as flowrate, of a fluid within a fluid circuit having a preexisting filter head. The device is installed on the filter head in place...
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6164141 |
Gas delivery sensor and respiratory aid appliance comprising such a sensor
A gas delivery sensor, of the type in which two upstream and downstream pressure pick-up conduits, which are each connected to a pressure sensor, open into a gas flow duct, in which a permeable...
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6121884 |
Gas flow detector
A gas flow detector (10) includes a casing (12) with an inlet (14) for connection to a gas source and an outlet (16) for connection to a gas using appliance. Between the inlet and outlet there is...
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5827978 |
Flow transducer
A flow transducer includes a piston movable in a sleeve to vary the area of an orifice. The piston may move in either direction from a position in which flow is prevented. Movement in both...
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5743270 |
Resistive element for spirometer
The present air tubes include a resistive element which is located in the hollow space of the tubular portion. This resistive element is adapted for providing a linear resistance-versus-pressure...
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5456107 |
Modular gas flowmeter
A high accuracy flowmeter for testing and calibrating flowmeters and the like, and more particularly a positive displacement flowmeter which may include a cylinder (12), a piston (10) within the...
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5440925 |
Flow calibrator
The invention relates to a high accuracy flowmeter for testing and calibrating flowmeters and the like, and more particularly to a positive displacement flowmeter which may include a cylinder (12),...
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5337617 |
Gas flow meter
A gas flow meter includes a cylinder closed at its upper end and slidably supported within a bearing ring. The cylinder side wall is provided with openings. A gas flow is directed into the interior...
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5115684 |
Flowmeter for measuring the rate of fluid flow in a conduit
The flowmeter includes a piston that is biased by a spring to a neutral position within an encircling collar, and the piston is movable relative to the collar by and in the direction of the fluid...
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5033644 |
Precision dispensing of varying viscosity fluids in a prescribed mix ratio
The flow rate of fluid components, typically water and syrup, is sensed by a flowmeter that is substantially insensitive to variations in fluid pressure and/or viscosity. A feedback circuit which...
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5024105 |
Viscosity-insensitive variable-area flowmeter
The differential-pressure-sensing and variable-area-occluding functions of a variable-area flowmeter, or rotameter, are performed by separate, but mechanically connected, means. A housing defines a...
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4937558 |
Flow failure detector
A device and system for detecting the existance of fluid flow from a fluid source to a pipeline includes a cylinder with an inlet at a first end and a lateral outlet. A piston in the cylinder is...
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4905844 |
Method for monitoring ranges of volumetric fluid flow
A method for monitoring the existence or non-existence of a given range of volumetric fluid flows through an input channel by correlating the same to a range of sensitivity of a magnetic sensor to...
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4838093 |
Flow meter and method of measuring flow
The invention includes a wall member which defines an expandable volume having a fluid inlet and a fluid outlet. The expandable volume varies in size as a function of fluid flow rate, and the...
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4787253 |
Electronic display flow meter
A flow meter having electrical signal outputs and a digital display is described. A transducer uses a magnet inside the flow meter to position a ball on a resistor bar and a contact bar and, thus,...
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4619146 |
Flow meter
A flow meter includes a piston having magnetic properties. The piston is located in a cylinder having an outlet slot. Fluid flow into the cylinder and out through the slot determines the position...
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4567777 |
Device for measuring the throughflow of liquids and gases
Device for throughflow measurement of gases or liquids according to the suspension principle, with a suspension element in the housing and special design of the housing, the attached indicator...
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4528858 |
Flow meter
An improved flow meter has a vertical chamber of relatively constant cross-section. In this chamber a float resides having a corss-section only slightly less than the cross-section of the chamber....
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4507976 |
Flow meter with hall effect sensor and method
A fluid flow meter comprising a fluid tight housing including an inlet and an outlet; a hollow liner mounted within the housing including at least one slot, the slot for receiving fluid from the...
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4489614 |
Flowmeter
A flowmeter for measuring the flow rate of a liquid or gaseous media is disclosed. The flowmeter comprises a body portion including an inlet and an outlet. A fluid path extends between the inlet...
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4479377 |
Method and apparatus for measuring gas flow
A movable piston is arranged within an open-ended cylinder, the piston having a peripheral groove for receiving liquid mercury to create a sliding gas-tight seal between the piston and the...
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4466293 |
Volume flow meter for a flowing medium
A volume flow meter for the measurement of the flow quantity of a liquid, which meter comprises a cylindrical flow channel (3), which has an inlet point (10) and an outlet point (12) for passing...
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4459859 |
Flowmeter
There is provided a flowmeter comprising a vertically extending inlet chamber having an inlet opening at its lower end, a vertically extending outlet chamber horizontally spaced-apart from the...
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4368646 |
Flow meter for liquid or gaseous media
A flow-through meter for liquid or gaseous media including a housing through which the medium flows. A floating body is disposed within the housing for movement under the influence of a lifting...
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4350050 |
Flow transducer
A fluid flow sensor includes a housing defining a flow path for fluid flow therethrough. A valve member slidably engages the housing and moves with respect to a fixed cylindrical metering member in...
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4315436 |
Flow-rate transducer with electrical output
The invention in a preferred form contemplates a valve-like structure adapted for series-connection in a pipe or other conduit line and having a valve member which is caused, within the constraint...
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4304136 |
Electrical transducer responsive to fluid flow
The invention in a preferred form contemplates a valve-like structure adapted for series-connection in a pipe or other conduit line and having a valve member which is caused, within the constraint...
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4300402 |
Flow measuring needle and orifice for flow meter
A remote volume flow meter is disclosed in which a variable density optical filter attached to a moving diaphragm indicates flow by filter position. The diaphragm has a hole, which hole travels...
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4194394 |
Flow meter
A flow meter comprises a housing defining a fluid inlet passage and a fluid outlet passage; a piston defining a jacket surface and a base surface is arranged in the housing for reciprocating...
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4122863 |
Differential pressure overflow valve
A differential pressure overflow valve has a housing with a differential pressure indicator therein consisting of a cylinder containing a piston moving against the force of a spring; the piston is...
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4122839 |
Apparatus for the determination of respiratory passageway resistance
An apparatus for the determination of the respiratory passageways resistance, including a flow resistance in the breathing or respiratory flow passageway, whose resistance value is periodically...
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4034606 |
Gas flow transducer utilizing rolling piston
A transducer for proportionally indicating small quantities of gas flow utilizing a rolling piston in association with a flexible electrical conducting band engaging terminals within the piston...
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3937082 |
Gauge system for measuring air flow in ducts
For use in measuring air velocity and pressure changes in a duct, a gauging system comprising a gauge including a vertically extending transparent tube within which a ball moves to a position...
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3933040 |
Flowmeter
A flowmeter for measuring the quantitative flow of fluids such as gases passing therethrough is disclosed and includes a housing forming at its upper end a centrally located tubular guide. The...
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3889535 |
Flow sensor and system
A flow sensor has a housing with an inlet and outlet formed therein with a cylindrical passage interconnecting the inlet and outlet. An axially slidable piston contained in the cylindrical passage...
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3803914 |
FLOW METER FOR PARENTERAL SOLUTIONS
A flow meter for measuring and indicating the flow rate of a parenteral fluid intravenously fed into a body comprises a transparent plastic cylinder positioned in a transparent plastic tube so that...
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3744313 |
FLUID FLOW METERING DEVICE
A device for metering fluid flow, including a casing adapted for connection to a conduit and having a chamber registering with said conduit, and a plunger movable in the chamber in proportion to...
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3693441 |
FLUID STREAM SENSING DEVICE
A fluid stream sensing device has a casing and therein a transparent measuring tube and within the same a sensing body arranged to be floated by incoming fluid stream and lifted by same to a level...
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3691834 |
VARIABLE AREA FLOW METER
A variable area flow meter having a large range of flow measurement. The meter includes a body portion having inlet and outlet ends. An elongated upright core tube within the body portion receives...
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3686945 |
VENT FOR FLUID FLOW METERING DEVICE
A device for metering fluid flow through a conduit, including a flow chamber registering with the conduit, a plunger movable in the flow chamber in proportion to the amount of fluid flow through...
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3446986 |
FLOW INDICATOR AND CONTROL SYSTEM
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3415119 |
Visual flow indicator
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3411357 |
Positive crankcase ventilation tester
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3408865 |
Fluid flow indicating meter
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3368402 |
Variable area flowmeter
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3357244 |
Flow indicator
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3302613 |
Air reserve indicator for miking systems
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3253459 |
Miles per gallon meter
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3218853 |
Flow rate measuring device
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