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| Number | Title | Issue Date |
| 7324901 | Water measurement auto-networks Water measurement auto-networks and methods of operation are disclosed herein. An exemplary method may include determining a water level at a first water measurement station in an auto-network. The method may also include reducing power to at least a transmitter at ... | 01/29/2008 |
| 7314039 | Method of controlling operation of a liquid-fuel combustion appliance A method of controlling operation of a liquid-fuel combustion appliance. The method is characterized by including an “antiseize operating mode” in which an electric motor and a fuel pump, powered by the electric motor, are started periodically to prevent oxidati... | 01/01/2008 |
| 7276023 | Device for checking endoscope channels In order to check endoscope channels, a predetermined quantity of liquid is led, at a predetermined pressure, through the channel that is to be checked, and the period of time for this is measured and evaluated. The predetermined quantity of liquid is determined via... | 10/02/2007 |
| 7251998 | Liquid measurement system having a plurality of differential pressure probes The weight of liquid in a tank subject to tilting is determined by measuring differences in air pressure in the ullage (the empty volume of the tank above the level of the liquid) and the air pressure produced by the weight of the liquid at the bottom of the tank. T... | 08/07/2007 |
| 7216530 | Fluid containment element leak detection apparatus and method The invention may be used for detecting fluid leaks in a fluid containment element having a primary element enclosed in a secondary element. A fluid container may have a reservoir with an upstanding test cylinder with a selected fluid volume. A device may be dispose... | 05/15/2007 |
| 7156380 | Safe liquid source containers Containers for providing vapor phase reactant from liquid sources include bubbler designs and designs in which carrier gas flows over the liquid surface. Among the bubbler arrangements, a bypass conductance is provided to release excess pressure from the gas volume ... | 01/02/2007 |
| 7137567 | Thermostat calibration device A pneumatic thermostat calibration device with a removable cover to protect the sensor needle from clogging and/or damage and the user from needle induced injury. The pneumatic thermostat calibration device should also be sized to fit in the pocket of a user. The pn... | 11/21/2006 |
| 7036687 | Liquid beverage mixing chamber The present disclosure relates to a system method and apparatus for mixing a beverage produced from a concentrate. The apparatus includes a mixing chamber having a removable cover with at least one protrusion formed thereon for disrupting a flow of beverage into the... | 05/02/2006 |
| 7019656 | Empty gas supply tank pending warning An apparatus and method for notifying a user of a pending empty gas supply tank. The user can input the initial volume of the gas supply tank, a gas monitor can monitor the amount of gas that was injected into the chamber and an indicator can notify the user when th... | 03/28/2006 |
| 7005077 | Shipboard human waste treatment for removing solids A method and system for separating human waste solids from liquid for a shipboard toilet system that allows for the separation of solid waste, compaction of the solid waste and storage of solid waste. Wastes are deposited into a shipboard toilet system that uses vac... | 02/28/2006 |
| 7000468 | Electronic level gauge Disclosed is a fluid level gauge for sensing the level of fluid in a dispenser. The level gauge includes an inlet port communicating with the fluid and a check valve in communication with the inlet port. The check valve includes a membrane which allows air to pass. ... | 02/21/2006 |
| 6980914 | Method for determining a corrected weight of a batch tank The present invention relates generally to weight measurement methods and systems, and more specifically, to weight measurement methods and systems for material in a dynamic vacuum material transfer or other system utilizing differential conveying fluid pressure. Th... | 12/27/2005 |
| 6965318 | Method and system for monitoring air pressure in a telecommunications network A system for monitoring air pressure in a telecommunications network comprises a plurality of monitoring units, at least one device server, a computer network, and a terminal. Each monitoring unit is connected to a device server. A user at the terminal receives air ... | 11/15/2005 |
| 6931926 | Liquid depth sensing system with liquid identification capability The present liquid depth sensing system with its liquid identification capability provides an economical device which may be installed in a multitude of different applications to perform multiple quantity measurement and detection functions. The present system inclu... | 08/23/2005 |
| 6932028 | Apparatus and method for determining a liquid level in a steam drum An apparatus for determining a density-compensated liquid level in a vessel containing a mixture of liquid and vapors comprises a temperature sensor which produces a signal that is proportional to the temperature of the mixture; and a processing apparatus that inclu... | 08/23/2005 |
| 6931925 | Method for determining the current filling level of a liquid in a container The invention relates to a method for determining the current filling level of a liquid, preferably a calibrating, quality control, or cleaning fluid, or waste water, in a container, for example of an analyzer, where an immersion pipe is dipped into the liquid in th... | 08/23/2005 |
| 6851312 | Water-bearing household appliance In a water-bearing household appliance with a liquid container filled through a valve in a liquid feed line, and in which a liquid filling level is detected for monitoring at least one safety level of a safety device, the safety device includes an optical light guid... | 02/08/2005 |
| 6763714 | Method and apparatus for controlling the level of liquids Method for controlling the level of a liquid (2) contained in at least one vessel (3), which comprises the following operative steps: inserting a measure tube (1) in the liquid (2); arranging an auxiliary duct (6; 21) inside or out... | 07/20/2004 |
| 6700503 | Method of communicating conditions within a storage tank level A system for monitoring the conditions within a storage tank includes a sensor communicating data indicative of conditions within the storage tank to a base controller. The data is decoded and arranged into a graphical display of the conditions of the sto... | 03/02/2004 |
| 6666085 | Liquid level sensor A liquid-level measuring device measures the liquid level in a tank. This invention measures liquid level by measuring the pressure at the bottom of the tank. A pressure sensor is placed in the top sealed end of a pipe extending from above the top of the ... | 12/23/2003 |
| 6601449 | Self-regulating bubble tube assembly A self-regulating bubble tube assembly is used for determining the hydrostatic pressure exerted by fluids, such as drilling mud. The bubble tube assembly can be used to determine fluid level based upon said hydrostatic pressure and when bubble tubes are u... | 08/05/2003 |
| 6510736 | Liquid depth sensing system The present invention is a liquid depth sensing system utilizing the bubble tube or purge operating principle. In this system, a pneumatic tube extends downwardly into the liquid, and air (or other gas) passes through the tube to bubble from the lower end... | 01/28/2003 |
| 6490919 | Well water level measurement and display apparatus A well water level sensing apparatus using a pressurized air column in contact with the water at its distal end to derive a correlated value dependent upon the length of the air column which is converted for retrieving stored water levels from memory and ... | 12/10/2002 |
| 6298721 | Continuous liquid level measurement system A continuous liquid level measurement system is disclosed which is based upon a differential pressure measurement. The pressure of the liquid level to be measured is calibrated with a second pressure measurement of the pressure above the liquid in order t... | 10/09/2001 |
| 6220091 | Liquid level pressure sensor and method The present invention provides methods and systems for forming deposition films on semiconductor wafers. In particular, the present invention measures the amount of liquid remaining in a bubbler ampule of a semiconductor processing system used for chemica... | 04/24/2001 |
| 6064311 | Process for generating at least one warning signal relating to the level in a product storage tank and device for implementing the process The process for generating at least one warning signal relating to the level in a tank (3) for storing a product (4) comprises the following steps: the storage level of the product in the tank, together with the values of the product quantity consumed dur... | 05/16/2000 |
| 5983716 | Method and measuring device for measuring hydrostatic pressure, in particular that of ground water The invention covers a procedure for measuring hydrostatic pressure, especially that of ground water, with the particularity that air is bubbled into the ground water, the pressure in the measuring pipe is fed to an absolute pressure cell and atmospheric ... | 11/16/1999 |
| 5966311 | Method of overfill probe identification and control A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each ou... | 10/12/1999 |
| 5953954 | Installation and method for determining the level and density of a liquid in a tank, using a single immersed bubble probe An installation and method for determining the level and density of a liquid in a tank. A reference probe leads into the tank, above the liquid. A single bubble probe is connected by a valve to the reference probe. The bubble probe extends into the tank a... | 09/21/1999 |
| 5868029 | Method and apparatus for determining fluid level in oil wells A method and apparatus for continuously monitoring fluid level in an oil well, by measuring changes in the weight of the oil well tubing which result from changes in the buoyancy of the tubing caused by the rise and fall of fluid level within the oil well... | 02/09/1999 |
| 5831154 | Process for determining a liquid quantity, particularly an engine oil quantity in a motor vehicle A process for determining the quantity of a liquid situated in a largely closed system of a motor vehicle is provided. The filling level of the liquid in the system fluctuates as a function of the driving condition. In the case of a known process of this ... | 11/03/1998 |
| 5771178 | Fail-safe fluid transfer controller A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each ou... | 06/23/1998 |
| 5722289 | Cooking appliance with level detection apparatus and method A deep fat fryer system includes a vat for holding a quantity of cooking medium. A tube or conduit is disposed between a position in the vat corresponding to a lower desired level of cooking medium in the vat and a blower for creating a vacuum in the tube... | 03/03/1998 |
| 5519638 | Automatic system for monitoring and replenishing hazardous liquids in tanks An automatic system is disclosed which monitors and replenishes hazardous liquids in their holding tanks, as such liquids are typically used in manufacturing processes. The inventive system and method obviate the need for manual surveillance and handling ... | 05/21/1996 |
| 5463378 | Proximity detection system and oscillator, and method of using same A proximity detection system includes a dual mode oscillator for generating a pair of ON and OFF control signals. A sensing circuit including a capacitance device detects the presence of a conductive object, such as a liquid, to cause the oscillator to sw... | 10/31/1995 |
| 5347863 | Asphalt oil tank monitor A pipe probe is installed downward into the liquid contained in the tank and is connected pneumatically to a remote reporting unit located in the operator's area. An air pump pressurizes the probe, increasing the pressure up to the point at which the liqu... | 09/20/1994 |
| 5311881 | Load sensing and measuring system A system for sensing and measuring the forces acting on the body extremities of individuals is disclosed. The system is intended for use primarily in an aqueous medium, i.e. as an aquatic dynamometer, and includes a pressure indicator for measuring the dy... | 05/17/1994 |
| 5309764 | Tank gauging system A system to determine fluid level in a tank using several tubes extending to different levels in the tank. Gas pressure in the tubes needed to release bubbles from the exit ends of the tubes indicates the hydrostatic head at the exit ends. A control unit ... | 05/10/1994 |
| 5279158 | Steam bubbler water level measurement A liquid level measuring system for the steam drum of a steam generator employs a plurality of bubblers spaced along the length of the drum to obtain a level profile. The steam pressure to the bubblers is supplied by tubes connected to the steam/water inl... | 01/18/1994 |
| 5271273 | Oil level indicator An oil level indicator having an oil container and an indicator tube extending therefrom. The indicator tube is inserted through a dip stick tube of an engine into the oil pan.... | 12/21/1993 |
