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Class 73/861 - VOLUME OR RATE OF FLOW


Subclass of Class 73 - Measuring and testing
Definition: Devices for determining the volume of flow, speed, volume
No. of patents: 377
Last issue date: 02/14/2012


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NumberTitleIssue Date
4718478Procedure for controlling a thermal installation
A process controlling a thermal installation is described. The flow of a process liquid through a heat exchanger is achieved dependent upon two temperatures. One is the return temperature of the process liquid which, through the switching on and off or mo...
01/12/1988
4716768Process and apparatus for determining and influencing the flow properties of solid granular material
A process and apparatus for measuring the flow rate of solid granular material in which a sample holder of variable geometry is provided with an aperture containing a shutter. The aperture is opened and the material is collected and weighed. Either the ti...
01/05/1988
4693122Method and apparatus for calibrating a material-spreading applicator
Method and apparatus for calibrating a material-spreading applicator. A broadcast spreader or planter is moved over a field for a measured length. The amount of fertilizer or seed which the applicator would have spread over the surface while it was so mov...
09/15/1987
4669308Method and apparatus for determining liquid flow rates
There is provided a method of determining the total inflow of a liquid through a liquid-flow system such as a sewage pumping station, in which liquid enters a sump cavity and is pumped out of the sump cavity on a periodic basis. The probable inflow rate d...
06/02/1987
4667503Method of calibrating volumetric metering and blending device
A calibration method for a volumetric metering and blending device which involves the use of a memory base to calculate and control the speed in which an auger dispenses each quantity of ingredient into a hopper. The method involves operatively connecting...
05/26/1987
4638233Method of establishing a preferred rate of air flow, method of determining torque, and apparatus
A method of determining torque of an electronically commutated motor arranged to drive a blower means for flowing air through a contained space with the electronically controlled motor and the blower means having a combined predetermined inertia. In pract...
01/20/1987
4597050Apparatus for indicating flow of solid material into an earth moving device
The present invention relates to the use of a solid material flow meter which utilizes a friction pad thermally connected through a thermal path of known thermal characteristics to a heat sink. Temperature sensors are positioned along the thermal path to ...
06/24/1986
4581707Microprocessor controlled valve flow indicators
A device for ascertaining flow rate through one or more valves and/or pumps simultaneously. A transducer (T.10) is connected to the valve actuator member and displaceable or rotatable therewith and produces an output determined by the valve position. The ...
04/08/1986
4570491Rate meter and method of determining distribution rates
A rate measuring device comprises a beam with a plurality of graduated scales and a cup on one end thereof. While a material dispensing machine is moved a certain distance, the material normally applied to the ground is collected in a container and subseq...
02/18/1986
4555712Ink drop velocity control system
A method and apparatus are disclosed for providing feedback control of the ink drop velocity in a drop marking system. The control system maintains essentially constant velocity of the ink drops as they pass through a deflection field which causes certain...
11/26/1985
4538445Liquid flow meter
A meter for measuring liquid flow rates to a device under test has a liquid supply tank connected to the device by a conduit and also has a test standpipe having a uniform internal diameter connected to the device by a conduit as well as also being connec...
09/03/1985
4530247Timed gas metering and distribution system
A timed gas metering and distribution system provides a point of use metering and an individual remote meter readout capability in a branched-line gas distribution system, such as in a multi-unit apartment building. In such a system, a single main gas lin...
07/23/1985
4520677Solids mass flow indication with radiation
Method and apparatus for indicating mass flow of a solid particulate material through a rotary feeder. A radiation source and detector are positioned in a manner whereby radiation flux is directed through, and attenuated by, particulate material contained...
06/04/1985
4509371Venturi flow measuring device and method
A planar venturi is located at the discharge of an air conditioning unit to form a part of the unit and to stabilize flow. A plurality of sensor locations are provided in the diverging portion of the venturi such that a velocity sensor can be located in t...
04/09/1985
4491023Means for checking and/or measuring the actual amount of sprayed plant protective substances
A device and a method for checking and/or measuring the actual discharge amount of plant protective substances sprayed from a plant protective spraying machine; the device is a measuring container provided with a scale indicating the volume of liquid and ...
01/01/1985
4481827Blood fractionation apparatus having collection rate display system
An apparatus for separating and collecting plasma from whole blood includes a collection rate monitoring system which provides a digital display of the rate of plasma collection per minute. A transducer circuit within the system develops an electrical sig...
11/13/1984
4476718Rain rate meter
A rain rate meter for delineating short-term variations in rain rate having a housing which encloses an electronic balance sensitive to approximately 0.01 grams. The top of the housing is open and has a funnel-shaped element located therein for receiving ...
10/16/1984
4474061Sonic pressure volume measuring device
The volume of gases in a container or the volume of liquid in the container is determined by creating cyclic pressure waves in the gases and detecting the waves by a second transducer. The signals produced by the second transducer are a function of the vo...
10/02/1984
4472022Vortex flowmeter
A vortex flowmeter including a single optical fiber into one end of which a light signal can be transmitted from a source to the other fiber end where it is vortex modulated. Modulated light at the other end is then reflected to a receiver back along the ...
09/18/1984
4467657Device for measuring the amount of flow and/or the speed of flow of a medium
A device for measuring the amount flowing through and/or the speed of flow of a medium which is pumped by means of a pump unit. The device comprises a drive motor for producing the working cycles of the pump unit and a pick-off to detect said working cycl...
08/28/1984
4458539Blood fractionation apparatus having collected volume display system
An apparatus for separating and collecting plasma from whole blood includes a volume monitoring system which provides a continuous display of the volume of plasma collected. A transducer circuit within the system develops an electrical signal frequency-de...
07/10/1984
4455870Method and apparatus for determining liquid flow rates
There is provided a method of determining the total inflow of a liquid through a liquid-flow system in which the liquid enters a sump cavity and is pumped out of the sump cavity by pump means. Computing means calculates an on-going total inflow volume for...
06/26/1984
4448207Medical fluid measuring system
A urine discharge measuring system for medical use which includes a gimbal mounted frame supporting a urine container of fixed dimensions to collect urine from a urinary catheter attached to a patient. An ultrasonic transceiver mounted above the container...
05/15/1984
4409844Flow rate measuring device
A flow rate measuring device for use with liquids or appropriate dry materials, comprising a receptacle calibrated to indicate flow rate (e.g. gallons per minute) rather than static volume, and where a specific sampling period (e.g. 5 seconds) is also spe...
10/18/1983
4409845Calibrating bag for use on dispenser nozzles
A calibrating device for agricultural sprayers utilizes an elongate, flexible throw-away bag of plastic sheet material having a top portion adapted for attaching to an agricultural sprayer boom and an open interior cavity for collecting the spray from a s...
10/18/1983
4397189Measuring low flowrates
Measuring the flowrate of a liquid by directing the liquid to a vertically-positioned collection tube, periodically sensing the height of liquid in the tube, and averaging a plurality of data points to obtain an average flowrate value....
08/09/1983
4395918Flow rate meter
A device for determining the flow rate of a liquid flowing from an open discharge. The liquid is directed into a bucket with a first sensor located low in the bucket and second sensor located high in the bucket. The volume of the bucket between the sensor...
08/02/1983
4389897Impeller flow-meter pulsation damping
The subject matter of the invention is an impeller flow-meter, particularly for accurate measurement of the flow rate of liquid fuel fed to an internal-combustion engine. In the flow-meter according to the invention, an impeller chamber (1) is provided wi...
06/28/1983
4375667Personal air sampling system
A thermal anemometer is employed to detect the velocity of the air flowing through a personal air sampling device. A microprocessor system is employed to periodically read the signal from the thermal anemometer and calculate the sample air flow rate. The ...
03/01/1983
4367652Method and apparatus for monitoring wastewater
A method and apparatus for monitoring wastewater includes lowering a probe-carrying member into the manhole and moving the member into engagement with a primary measuring device for gauging the depth of the monitoring equipment probes. The member is then ...
01/11/1983
4364413Molar gas-flow controller
An apparatus for controlling the volume of flow of a gas. A reference volume has an input conduit connected to the source of gas and an output conduit connected to a utilization device. Valves in the input and output conduits are cyclically controlled to ...
12/21/1982
4357670Devices for testing spraying nozzles
A device for testing the performance of agricultural, horticultural or the like spraying equipment. The device includes a flowmeter, a fitting for coupling the flowmeter to a nozzle in the equipment, electrical circuit to which an electrical signal from t...
11/02/1982
4353118Apparatus for determining the throughflow in pipe conduits
Analogue measuring value signals, generated in a throughflow measuring device, are infed to a computer by means of an analogue-digital converter. The computer adds the received digital signals and produces at regular time intervals, for instance every thr...
10/05/1982
4344329Flow analyzer
A sewer flow measurement system for determining flow conditions of a sewer line system wherein separately located monitors make and record precisely synchronized and time identified pressure measurements, utilizing pressure-to-signal transducers positione...
08/17/1982
4336808Ultrasonic wave probe
An ultrasonic wave probe comprises an ultrasonic wave transmitting vibrator and a pair of ultrasonic wave receiving vibrators in order to measure blood flow velocity. The receiving vibrators are adapted to receive reflected waves of an ultrasonic wave whi...
06/29/1982
4317178Multiple velocity traverse flow rate measuring technique
A method and systems based thereon for conducting a multiple velocity traverse of a flow stream cross section of known shape and area to determine flow therethrough. The technique employs any one of the known methods of numeral integration to place the tr...
02/23/1982
4307601Apparatus for calibrating flow meters and the like
Measuring apparatus for calibrating flow meters and the like comprising a piston slidably mounted within piston cylinder means which receives gas passing through the flow meter being calibrated to cause the piston to be lifted. A precision encoder is rota...
12/29/1981
4297893Method and apparatus for measuring flow characteristics of moving fluid stream
This invention relates to the measurement of the temperature and/or mass flow rate of a free falling molten stream of material. Previous techniques have not recognized the effects temperature variations of the molten stream of material have on the measure...
11/03/1981
4285245Method and apparatus for measuring and controlling volumetric flow rate of gases in a line
Disclosed is a method and apparatus for measuring and controlling volumetric flow rate of gases. The apparatus includes a measurement chamber of fixed volume in a flow line, a controllable inlet valve upstream from the chamber, and flow regulator means fo...
08/25/1981
4262530System for measuring oil consumption
A system for measuring the quantity of fuel oil consumed by a furnace burner of the gun type and particularly one used in home heating. Without the need to incorporate a device such as a sensor into existing fuel supply lines or fuel storage tank, the sys...
04/21/1981
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