Matches 101 - 150 out of 185 < 1 2 3 4 >
Match Document Document Title
5365459 Continuous stack flow rate monitor  
A stack flow rate measurement system and method utilizes the measured temperatures and pressures of the flue gases in a stack and the measured power supplied to a fan to calculate and display flue...
5307288 Unitary fluid flow production and control system  
A fluid flow production and control system includes a variable speed pump defining a fluid flow path therethrough and a fluid flow path outlet, for operating at a speed determined by an input speed...
5251148 Integrated process control valve  
An integrated process control valve includes a fluid valve body having an inlet for receiving fluid, an outlet for discharging fluid, a fluid flow passage connecting the inlet and outlet, and a...
5220515 Flow verification for process gas in a wafer processing system apparatus and method  
The flow of process gas used in a semiconductor wafer fabrication system is verified against the known flow of a verification gas using a derivative of the ideal gas law: n' pro =(P' pro /P'...
5153823 Device to measure and/or control flow-through and/or quantity of heat  
A device for measuring or controlling a property of a flow medium comprises a conduit which carries a flow medium. A choke element located in the conduit has a first open operating position and a...
5142483 Pressure regulating system for positive shut-off pressure controller  
A pressure controller rapidly, precisely sets and stabilizes the pressure in a test volume to a target pressure by opening a fast inlet solenoid valve or a fast outlet solenoid valve, and opening a...
5107441 System for evaluating the flow performance characteristics of a device  
A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full...
5094112 Process and a device for carrying out measurements at a foaming liquid  
This specific density of the liquid/air mixture is measured at successive levels within the reception vessel for the liquid using a reference measurement (Io) representing the specific density of...
5063519 Landfill gas production testing and extraction method  
A method for determining total landfill gas production capability and pollutant emission rates involves measuring gas pressure in a soil cover at various locations around the landfill. These...
5058437 Determining the quantity yield of a compressible fluid flowing through a pressure reducing valve  
The invention is intended for determining the quantity yield of a compressible fluid flowing through a conduit which is provided with a pressure reducing valve. According to the invention, this...
5056047 Method and device for measuring fluidic or calorimetric parameters  
A method and a device serve for measuring fluidic or calorimetric parameters, for example the velocity of flow, and comprise the steps of heating up a sensor element arranged in a measuring...
5050109 Method and apparatus for measuring the humidity of ambient air surrounding an aircraft in flight  
An apparatus and method of determining the humidity of ambient air surrounding an aircraft in flight are disclosed. Air is captured as the aircraft flies. Measurements for calculating the mass flow...
5047950 Method and an apparatus for measuring the flow in oscillating displacement pumps  
In a method and apparatus for measuring and monitoring the flow in oscillating displacement pumps, the basis for measurement used is the working principle of the pump itself and, accordingly, the...
5040126 Method for predicting steady-state conditions  
To stabilize flow rate in a single-stroke, syringe-type high pressure pump to a constant value after turn-on, a control system; (1) in one embodiment, senses the maximum rate of change of pressure,...
4987549 Temperature compensated flowmeter techniques  
A bridge-type "hot wire" flowmeter is temperature compensated by selecting the values of a power resistor, a ballast resistor and a calibration resistor in accordance with an iterative numerical...
4965713 Terminal element  
An element which serves as the terminal or end point for a control system which uses a controllable plant to interface the environment, the plant is controlled by an actuating signal generated...
4951224 Control device for fluid flow  
An apparatus for controlling the fluid flow rate through a fluid transmission conduit is disclosed. A first set of resistors and a second set of resistors are connected in full bridge fashion and...
4945491 Monitor and control for a multi-pump system  
Wire-to-water efficiency (W) of a multi-pump system is monitored and accurately determined according to the formula: ##EQU1## wherein Q is flow through the system, HS is total dynamic head across...
4942758 High speed leak tester  
A computerized leak tester system for rapidly testing a work piece for fluid leaks comprising a continuously regulated pressure supply, a coupler for connecting the pressure supply to a work piece...
4933886 Device for measuring melt flow index  
A melt flow index measurement device includes a sample enclosure (125), a loading device (90) for applying a sample under pressure to the enclosure, a pressure sensor (112) for determining the...
4905511 Fan assembly and a method for checking the function thereof  
In the context of a fan assembly for an air system comprising a bulkhead (20) and at least one fan (2) which extends through the bulkhead (20) and whose intake on the aspiration side and whose...
4905161 Flow stability reporting system for a liquid chromatography system  
There is disclosed herein a system for testing the flow stability of the pumping system for liquid chromatography. The system determines the flow rate and determines the number of revolutions over...
4884215 Airflow sensor and control circuit  
The airflow sensor uses a flow sensing bridge having a thermal element which senses airflow as a function of electrical energy applied to the bridge. Energy is applied to the bridge to maintain the...
4881412 Flow meters  
A 3-phase flow meter comprises a pipeline containing pressure and temperature meters and a meter for measuring the density of the combined flow. A proportion of the flow is diverted through a...
4872339 Mass flow meter  
A mass air flow measurement circuit is disclosed which provides a digital output without using a separate analog to digital (A/D) converter. This air flow measurement circuit includes a bridge...
4860222 Method and apparatus for measuring engine mass air flow  
A microprocessor based fuel control for automotive vehicle engines samples the measured air flow rate at fixed intervals and calculates the air mass flow for a cylinder interval which varies with...
4860231 Calibration technique for variable speed motors  
A variable speed motor is regulated responsive to the load torque acting on the blower wheel. The load torque acting on the blower wheel is determined by means of a coast down procedure in which...
4835687 Method for optimized management of a system of pipelines and a pipeline system realization in accordance with said method  
In order to achieve optimized management of a pipeline system for transporting gas, oil or other products, the flow rates and pressures at various system locations are determined and regulated in...
4807151 Electrical technique for correcting bridge type mass air flow rate sensor errors resulting from ambient temperature variations  
A mass flow rate sensor for providing an output signal related to mass flow rate past the sensor includes a bridge circuit for generating a first mass flow rate-related signal containing...
4807150 Constraint control for a compressor system  
A supervisory computer for a centrifugal compressor control system is disclosed which manipulates the set point of a controller for a valve in a recycle line from the compressor systems outlet to...
4799169 Gas well flow instrumentation  
Gas well flow instrumentation includes a computation unit and an interrogation unit. The computation unit measures parameters of gas flow at the well head and accumulates gas flow information over...
4796651 Variable gas volume flow measuring and control methods and apparatus  
A method and apparatus for measuring gas flow volume in a system (of the kind in which the amount of gas flowing in a duct can vary in response to the variation of area of a variable area orifice...
4780834 Apparatus for measuring mass throughput of a fluid moved in a channel  
An apparatus for measuring and indicating mass throughput of a fluid moved in a channel by a processing machine includes first to fourth measurement value pickups, first to third divider stages,...
4763626 Feedback fuel metering control system  
A feedback fuel metering control system is provided for an internal combustion engine and eliminates the need for high pressure fuel injectors, a high pressure fuel pump and a constant fuel...
4731730 Universal fuel quantity indicator apparatus  
A universal fuel quantity indicator apparatus (100,102) includes a digital fuel quantity indicator (100) having an internal microprocessor control unit (104) and a removably connectable digital...
4729236 Automatic orifice calibrator  
An orifice is calibrated by passing air through the orifice and into a tube arrying a water column. The rate at which the water in the water column falls due to the passage of air through the...
4720800 Device for measuring liquid flow volume with temperature compensating  
A device for measuring the volume of flowing liquid with temperature compensation includes a device for generating a volume signal, a device for detecting the temperature of the fluid to generate a...
4663977 Sonic measurement of gas flow  
A microcomputer is interfaced to a pair of probes for sending and receiving sonic signals across a flow stream of gas. The microcomputer reads phase information and determines a phase difference...
4586142 Pressurized cable-sheath leak locating instrument  
A portable instrument used by maintenance technicians to assist in locating an air leak in a pressurized cable sheath. The instrument functions by limiting the area of search thus, permitting a...
4581707 Microprocessor 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...
4574643 Two phase flowmeter  
The tubular flowmeter is capable of measuring two different physical parameters in a flowing mixture of liquid and gas (such as wet steam). These measurements are such that they can be used to...
4523460 Fluid measuring, testing and accounting system  
A system which enables the measuring, testing and accounting for a fluid, preferably oil, as stored in a tank battery adjacent a producing oil well system. In its most basic form, the system...
4521864 Measurement of build-up of fouling deposits by sensing flow characteristics during brief flow excursions  
A method and apparatus for measuring the thickness of film fouling in a hydraulic system. While the system is clean and unfouled, it is subjected to a brief test run during which the water velocity...
4450715 Method for measuring the flow of a medium  
A method is proposed for the measurement of a medium, in particular of the air aspirated by an internal combustion engine, in a flow cross section and for correcting the flow rate value (q)...
4393451 Method and apparatus for measuring total liquid volume flow  
Method for measuring total liquid volume flow in partially full cylindrical pipes, and apparatus for practicing the method.
4353118 Apparatus 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...
4344144 Apparatus for creating gas flow cycles  
An apparatus for creating gas flow cycles comprises a housing defining a chamber (80) provided with gas functions and a passage (76) for connection with an equipment to be tested. A unit movable in...
4317178 Multiple 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...
4303982 System for the measurement and control of the heat input to a gas burner  
A system for the measurement and control of the rate of BTU input to a gas burner wherein a signal is generated corresponding to the square root of the product of the burner inlet pressure...
4264961 Air flow rate measuring apparatus  
An apparatus for measuring the flow rate of suction air in an internal combustion engine in which the heat radiation characteristic of a heat generator disposed in the suction air passage, which...
Matches 101 - 150 out of 185 < 1 2 3 4 >