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4548076 |
Air flow volume measuring apparatus
An improved selector provides for air paths between a meter and an air volume sensing manifold that are similar for both up and down flow of air through the apparatus thereof. This provides similar...
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4548075 |
Fast responsive flowmeter transducer
A split flow mass flowmeter transducer in which measuring the rate of fluid flow through the meter is obtained via a thermal signal from a locally heated sensor tube that affords a parallel fluid...
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4522058 |
Laminar-flow channeling in thermal flowmeters and the like
In a compact thermal flowmeter unit of the type wherein a portion of the fluid in a main flow path is shunted through a laminar-flow sensor passageway, that section of the main flow path which the...
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4519246 |
Improved flow meter
An improved mass flow meter is disclosed for measuring the flow rate of a fluid through a thin walled sensor tube that has the feature of high sensitivity to the temperature of the fluid within the...
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4517837 |
Air flow rate measuring apparatus
An air flow rate measuring apparatus in which an air flow sensor whose electric characteristic varies with the rate of air flowing by the sensor is supported on a heat-insulating support member and...
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4497202 |
Laminar flowmeter
Apparatus for ensuring laminar flow through the main (non-measuring) branch of a split flow path flowmeter comprising a mass flow controller made of juxtaposed annular plates having interconnecting...
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4495802 |
Air flow meter assembly
An air flow meter for detecting the air flow supplied to an internal combustion engine includes a hot-wire disposed in a by-pass air passage opening at its one end to a portion of an air passage...
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4491026 |
Liquid flow meter
To measure a wide range of flow rates, and particularly such low flow rates as 0.5 liters per hour, while being able to accurately also measure rates of about 100 liters per hour, fluid is...
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4487062 |
Mass flowmeter
An improved mass flowmeter of the type having a primary passage for the fluid whose flow rate is to be measured, a sensor tube which serves as a secondary passage for the fluid and is connected to...
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4476720 |
Unidirectional fluidflow sensor system
A unidirectional fluidflow sensor system including: a sensing chamber for placement in a fluidflow to be monitored; the chamber including input port means facing toward the fluidflow and smaller,...
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4475387 |
High temperature mass flowmeter
Apparatus is provided for measuring the flow of high temperature fluid through a main line. A shunt path diverts a portion of the fluid flowing in the main line. The shunt path is so designed as to...
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4463601 |
Method and apparatus for measuring mass airflow
Where airflow through a system is subject to forward and reverse flow, the mass airflow rate is determined by providing two flow branches A and B meeting at a junction wherein the two branches...
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4461173 |
Multirange flowmeter
A multi-range gas flowmeter having a primary gas flow passage and a secondary passage which houses the flow measuring device and which is connected to the primary passage at its inlet and outlet...
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4457169 |
Apparatus for measuring the mass of a flowing medium
An apparatus is proposed for measuring the mass of a flowing medium in an air intake tube, in particular, for measuring the aspirated air mass of internal combustion engines. The apparatus has at...
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4454758 |
Venturi-type shunt flowmeter
A shunt type fluid flow measuring device for use in measuring the rate of fluid flow in a large conduit, wherein a section of said large conduit includes a reduced diameter portion forming a...
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4450718 |
Flow meter including improved laminar flow restrictor device therefor
This disclosure relates to a flow meter having an improved flow restrictor for creating laminar flow in the flow meter. The improved flow restrictor is an adjustable bypass or flow restrictor which...
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4449401 |
Hot film/swirl fluid flowmeter
A low pressure drop hot film/swirl air flowmeter (10) for an automotive engine is disclosed. The flowmeter includes a main air flow passage (18), a relatively small venturi (20) disposed within the...
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RE31570 |
Fluid flowmeter
A flowmeter in which a laminar flow conduit is connected in parallel to a flow restrictor comprising at least one disk having an opening through opposite surfaces and at least one conduit from the...
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4433575 |
Flow splitting device for fluid flow meter
A flow splitting device (10) for use in fluid flow meters and the like including an outer housing (12) forming a cavity having an inlet (28) and an outlet (30), a porous baffle (32) dividing the...
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4428231 |
Viscous link drive for fluid flowmeter
A low pressure drop hot film mass air flowmeter (10) for an automotive engine is disclosed. The flowmeter includes a main air flow passage (20), a fixed contoured flow nozzle (22) disposed in the...
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4426194 |
Viscosity compensating circuits
The present invention is directed to a simplified viscosity compensating circuit which utilizes a viscosity sensitive capillary and a flow restriction means in series therewith to regulate the...
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4420972 |
Air intake measuring apparatus for internal combustion engine
An air intake measuring apparatus for an internal combustion engine comprises a bypass passageway formed in a throttle body by bypassing a venturi section in a suction passage, and a thermal probe...
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4418568 |
Hot film fluid flowmeter with auxiliary flow sensing
A low pressure drop hot film/swirl air flowmeter (10) for an automotive engine is disclosed. The flowmeter includes a main air flow passage (18), a relatively small secondary passage such as a...
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4403506 |
Apparatus for the measurement of the mass of a flowing medium
An apparatus for the measurement of the mass of a flowing medium, such as for the measurement of the induced air mass in internal combustion engines which includes at least one...
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4395907 |
Air flow rate measuring device
An air flow rate measuring device has a by-pass passage branched from a main air passage leading to an engine, and heat wires provided in the by-pass passage. The inlet of the by-pass passage is...
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4392385 |
Flow meter utilizing Karman vortex street
A fluid conduit with a rectangular cross-section is divided into two parallel conduits. A vortex generating rod is disposed perpendicularly to the flow direction in one of the conduits. An...
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4386523 |
Apparatus for measuring and/or sampling the milk-yield of a cow during milking
An apparatus for measuring and/or sampling the milk-yield of a cow during milking is described. The apparatus comprises a housing with a milk inlet and a milk outlet and a rotation-symmetric...
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4381668 |
Gas flow measuring apparatus
An intake barrel connected to an intake pipe of an internal combustion engine is provided therein with a venturi member. Openings are formed in the wall of the intake barrel at the upstream and...
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4366704 |
Air intake apparatus for internal combustion engine
An air intake apparatus for the internal combustion engine is disclosed comprising a heating resistor placed in a bypass for passing the air of an amount in a predetermined ratio to the amount of...
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4282751 |
Fluid flowmeter
A low pressure drop air flowmeter (10) for an automobile engine is disclosed. The meter contains a main air flow passage (24), a relatively small venturi (20) to receive a portion of the air flow,...
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4232549 |
Two stage flowmeter
A low pressure drop air flowmeter for an automobile engine is disclosed. The meter contains a main air flow passage, a relatively small venturi to receive a portion of the air flow, pressure ports...
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4215565 |
Method and apparatus for testing a fluid
A method of testing a fluid is disclosed which comprises passing a main flow of a fluid through a conduit; inserting into said conduit a probe having an inlet opening which faces downstream of the...
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4213341 |
Apparatus for sampling a flow of liquid from a fluid at least some of which is a liquid
A flow sampling apparatus has a body through which a central inlet conduit runs and a dome on the body. An inlet orifice on the inlet conduit discharges a fluid containing some liquid (milk) and...
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4173890 |
By-pass flowmeter
A by-pass flowmeter of coaxial design comprises a transparent outer tube and a rotameter coaxially disposed within the outer tube and laterally spaced therefrom to define an annular by-pass...
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4100801 |
Mass flow sensing system
A mass flow sensor system for measuring the flow rate of a fluid in a sensing tube at diverse angular attitudes. Output signal distortion is minimized by neutralizing the effects of convection...
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4056975 |
Mass flow sensor system
A mass flow sensor system for measuring the flow rate of a fluid in a sensing tube at diverse angular attitudes. Output signal distortion is minimized by neutralizing the effects of convection...
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4041757 |
Fluid flowmeter
Apparatus for measuring the flow of fluid through a main supply line having a restrictive element therein to develop a pressure drop. A shunt fluid flow path bypasses this element. The shunt path...
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4030357 |
Metering of fluid flows
A rotary fluid flowmeter device comprising a casing enclosing a chamber bounded partly by a fluid-tight but magnetically permeable partition, said chamber having an inlet and an outlet for the...
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3874233 |
Gas volume meter
A gas volume meter is provided for use in a breath gas measuring instrument and system, in which the volume of the gas expired by a subject, the oxygen uptake in the expired gas, and the oxygen...
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3871364 |
Peak flow meter-expiratory flow rate
A housing defines first and second cavities, the first cavity having an input port for the user to breathe into, and an output port of variable size. The second cavity is cylindrical, communicates...
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3830104 |
VORTEX SWIRL FLOWMETER SENSOR PROBE
A vortex swirl flowmeter sensor probe having a thermal-electric sensor member is positioned outside of the fluid flowing through the meter. The probe is responsive to vortex swirls as they pass...
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3805610 |
FLOW DIVIDING MEANS, PARTICULARLY FOR THERMAL FLOWMETER
A thermal flowmeter which includes a main flow passage, a laminar flow (capillary) sensor passage connected across the main flow passage and a porous flow divider in the main flow passage between...
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3769835 |
PITOT CALIBRATED AIR VELOCITY MEASURING SYSTEM WITH TRANSDUCER
An air velocity measuring system having a probe adapted to be placed into a low of air and coupled to a measuring apparatus. The measuring apparatus may be a flow meter having a moving vane which...
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3747577 |
TEMPERATURE-DEPENDENT RESISTANCE ARRANGEMENT FOR CONTROLLING FUEL INJECTION AS A FUNCTION OF AIR INTAKE
A temperature-dependent resistor is placed in path of air intake. Resistor forms part of a bridge circuit. Amplifier input connected to the diagonal of bridge circuit, amplifier output connected in...
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3719082 |
AIR VELOCITY MEASURING SYSTEM
An air velocity measuring system having a probe adapted to be placed into a low of air and coupled to a measuring apparatus. The probe is specially constructed and precalibrated to track a pitot...
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3702566 |
HIGH AIR VELOCITY MEASURING SYSTEM HAVING THERMOTRANSDUCER
The air flow is received into an air shunting probe having a pressure output, which is matched to the pressure output of a pitot tube and accurately tracks a pitot standard, by means of a specially...
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3688576 |
IMPROVED AIR VELOCITY MEASURING SYSTEM AND METHOD FOR ITS CALIBRATION
A rapid response air velocity measuring system having a shunting probe adapted to be placed into a flow of air and coupled to a measuring apparatus, such as an air flow meter. A handle portion as...
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3683692 |
PROCESS AND APPARATUS TO CALCULATE AND MEASURE THE FLOW OF A GASEOUS FLUID
An apparatus to compute and measure the flow of a gaseous fluid by measuring the quantity of heat necessary to raise the temperature of the fluid comprising a sensing means disposed in the gaseous...
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3603148 |
FLOW METER OF THE AREA TYPE
A flowmeter of the area-type having a connecting pipe member for connecting the meter to a main line through which a fluid to be measured flows. The connecting pipe member is formed with an orifice...
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3538768 |
MILK MEASURING DEVICE
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