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| Number | Title | Issue Date |
| 7874195 | Liquid proving system A liquid proving system is provided with a bottom drain liquid prover draining into a holding tank. The fill opening of the prover has a prover fill opening self sealing assembly that remains closed except when a nozzle used to pump liquid into the prover is pushed ... | 01/25/2011 |
| 7079037 | System and method for indicating liquid level condition An indicator for displaying either low liquid level or satisfactory liquid level conditions within a tank includes a sensor for detecting the liquid level conditions, a photodetector for detecting an ambient dark condition, a pair of indicator lights for indicating ... | 07/18/2006 |
| 6922150 | System for level gauging and providing alarms for a storage room using two gauging devices for determining a current level value Method and device for calculating the level of the surface of a product in a storage room by a radar level gauging system, which includes a first gauging device for calculating a first value of level and functionally separated from the first gauging device a second ... | 07/26/2005 |
| 6766276 | Method and device for detecting a dysfunction of an ulatrasonic flowmeter A method for detecting malfunctions in a flowmeter includes the measuring of the receive signal VIN output by a transducer. A characteristic of the receive signal is compared to a predetermined reference characteristic VREF and the peak voltage... | 07/20/2004 |
| 6651480 | Particulate mass measuring method with intrinsic correction for volatilization losses The mass of particulate matter in a particle laden gas stream is measured using a single mass detector. The particle laden gas stream and a substantially identical but particle-free gas stream alternately engage the mass detector during successive measure... | 11/25/2003 |
| 6249752 | Vibrating conduit parameter sensors, operating methods and computer program productors utilizing real normal modal decomposition A plurality of motion signals is received representing motion at a plurality of locations of a vibrating conduit containing material. The received plurality of motion signals is processed to resolve the motion into a plurality of real normal modal compone... | 06/19/2001 |
| 6092409 | System for validating calibration of a coriolis flowmeter A System for validating a flow calibration factor for a Coriolis flow meter. In accordance with the present invention, the period of oscillation of a flow tube is measured as a material of a known density flow through the flow tube. The period of oscillat... | 07/25/2000 |
| 5752409 | Method of accurately gauging fuel in an automotive tank The maximum full level is determined in a fuel tank of undetermined size using a fuel level sender referenced to the tank bottom. A minimum full value is selected for a given type of tank and when the sender signal goes below a percentage of that value an... | 05/19/1998 |
| 5564305 | Apparatus and method for controlling the rate of flow of a liquid A column of liquid is formed in a conduit for such liquid, of which flow-off amount gives then between two level measuring probes a constant value. This constant value is compared with the indicated value of a flow meter arranged in the conduit regarding ... | 10/15/1996 |
| 5406828 | Method and apparatus for pressure and level transmission and sensing This invention provides a method and apparatus for transmitting and sensing liquid pressure (head) and liquid level (depth) in flow metering, tide gauge and liquid salinity or slurry density measurement applications. The invention essentially eliminates t... | 04/18/1995 |
| 5284046 | Mobile calibrating apparatus for control of volume meters for liquid, especially propellant pumps in the traffic sector The invention relates to a calibration apparatus for control of propellant pumps, especially in the traffic sector, which apparatus is placed on a vehicle, especially a trailer. The apparatus (1) has at least one standard (10) for measuring a determined a... | 02/08/1994 |
| 5263367 | Method and apparatus for determining delivery amounts and rates of pumps in the medicotechnical field A method to determine the delivery rate and delivery volume per unit of time of a liquid involves connecting one end of a sealed tube to the outlet of the pump, with the other end being provided with a pressure sensor. The pump is activated to pump liquid... | 11/23/1993 |
| 5131591 | Device for measuring flow Fluid delivery equipment, for example for distributing herbicide, is calibrated to provide a correct flow rate by performing a test cycle in which the fluid flows into a measuring device for a predetermined time, after which the volume of fluid in the mea... | 07/21/1992 |
| 5049317 | Metering arrangement for a gas mixture The invention is directed to an arrangement for generating and metering a gas mixture which includes controllable adjusting elements whereby the gas mixture is either conducted through a bypass line past a vaporizer unit to a consumer or is conducted thro... | 09/17/1991 |
| 4962666 | Mass flowmeter apparatus This invention relates to a method and apparatus for a liquid mass non-venting flowmeter. The flowmeter apparatus gives correct flow regardless of changes in density, viscosity, or composition of the liquid and corrects flow in spite of errors common in c... | 10/16/1990 |
| 4896539 | Spray calibration device and method A device for determining a flow rate of liquid discharged from a plurality of discharges comprising a plurality of collectors for the discharged liquid connected by a manifold having a plurality of inlet lines attached to the discharges and a single outle... | 01/30/1990 |
| 4889001 | Calibration of fluid delivery equipment The flow rate of a fluid, such as a herbicide, from delivery equipment is established by causing the fluid to flow into a calibration vessel (14), and measuring the volume which flows in a predetermined time. The vessel (14) is connected to a delivery hea... | 12/26/1989 |
| 4638233 | Method 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 |
| 4538445 | Liquid 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 |
| 4502318 | Method and apparatus for calibrating flow meters The specification discloses a method and apparatus for calibrating liquid flow meters of all types. The system includes a scale for dynamically determining the weight of a liquid flowing through a flow meter, together with means for measuring the flow thr... | 03/05/1985 |
| 4358947 | Method and apparatus for volumetric calibration of liquid flow sensor output signals A liquid flow sensor produces output signals which are monitored over a known volume of flowing liquid. That monitored signal value is scaled according to a predetermined volume of liquid to provide a correction factor, whereby the output signal of the fl... | 11/16/1982 |
| 4328697 | Transducer calibration device The output of a transducer is passed to an electrical circuit for supply to a fuel control network. In order to check the output of the transducer the output of the electrical circuit is sampled in a sample circuit when the movement of the member associat... | 05/11/1982 |
| 4073304 | System for calibrating a pump A system for calibrating the flow rate of a pump, and especially designed for a pump which is normally used in a system to blend highly vaporous and odorous fluids, in which the blending fluid discharged from the pump is diverted from its normal flow stre... | 02/14/1978 |
| 4062220 | Fluid measuring and metering system A system for accurately mixing two or more liquids and for dispensing the mixture. The system is generally adapted for use in paint spraying operations. The flow of one of the components is accurately measured by means of a flow meter and the measured val... | 12/13/1977 |
| 3939688 | Volumetric calibration A completely enclosed system for volumetric calibration wherein timed valves divert liquid components into separate metering tubes for observation. Pistons or separators in the metering tubes are displaced by the flow of liquid thereto. After the calibrat... | 02/24/1976 |
