Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8171786 | Fuel inventory monitoring system An ultrasonic-based or radar-based apparatus and method for fuel inventory measurements and for the detection and characterization of materials in a fuel tank, including sludge, water, microorganisms and materials of different viscosities and densities that are pres... | 05/08/2012 |
| 8146419 | Liquid level measurement device The present invention relates to a device (10) for providing a temperature compensated measurement of the level of a liquid (14) in a tank (12; 30). The device comprises a transducer (22) for transmitting and receiving acoustic signals, a... | 04/03/2012 |
| 8127602 | Measuring device for determining and/or monitoring the amount of contents in a container A fill-measuring device for determining and/or monitoring the fill level of a container, includes: a membrane (1) which can be caused to vibrate; a rigid membrane rim (2) in which the membrane (1) is disposed; a drive device (4) having a ... | 03/06/2012 |
| 8113047 | Ultrasonic measuring device for a container The invention relates to an ultrasound measuring device for a container. A coupling device supporting an ultrasound transducer serves for coupling and asymmetric alignment of the ultrasound transducer with respect to the container. This causes a sound field of the i... | 02/14/2012 |
| 8104341 | Ultrasonic liquid level monitoring system An ultrasonic liquid level monitoring system includes an ultrasonic transducer unit that is externally mountable to a tank. An ultrasonic emitter may generate an ultrasonic beam and receive an echo of the ultrasonic beam off a liquid surface inside a tank. An acoust... | 01/31/2012 |
| 8100006 | Liquid level measurement device and installation incorporating the same A liquid level measurement device comprises a generally seamless pipe for insertion into an installation in which liquid level is to be monitored and a non-contact sensor assembly disposed within the pipe at a location spaced above the liquid. The sensor assembly se... | 01/24/2012 |
| 8100007 | Method and apparatus for detecting contact of a pipetting needle with a liquid in a vessel A method and level sensor apparatus for detecting contact of a pipetting needle with at least a liquid contained in a vessel are disclosed. The apparatus provides a pipetting needle made of a material suitable for transmitting ultrasonic waves, a needle holder for h... | 01/24/2012 |
| 8096177 | Fuel inventory monitoring system An ultrasonic-based apparatus and method for fuel inventory measurements and for the detection and characterization of materials in a fuel tank, including sludge, water, microorganisms and materials of different viscosities and densities that are present in the tank... | 01/17/2012 |
| 8091421 | System and method for measuring content of a bin A system for measuring the height of bin content includes a transmitter for transmitting an acoustic pulse towards the upper surface of the content, a non-collinear receiver array for receiving an echo of the pulse and producing signals in response to the echo, and ... | 01/10/2012 |
| 8069721 | Radar level gauge system having limited transmission power A radar level gauge system, for determining a filling level of a product contained in a tank, the radar level gauge system comprising a transceiver including a signal generator for generating electromagnetic signals for transmission; a transmitter branch for transmi... | 12/06/2011 |
| 8069722 | Tank gage hatch assembly A tank gage assembly is provided including a tank gage antenna operatively couplable to a tank gage; a cover coupled to the tank gage antenna; a gage hatch flange including an opening and being coupled to the cover and structured to be coupled to a tank; and a hinge... | 12/06/2011 |
| 8061196 | Bottom up contact type ultrasonic continuous level sensor An ultrasonic sensor for measuring the level of liquid in a vessel has an elongated tubular probe, a tube within the probe, and a transducer that converts electrical energy to ultrasonic energy mounted at or near one end of the tube so as to transmit ultrasonic ener... | 11/22/2011 |
| 8037752 | Apparatus for measuring the filling level of a liquid in a container Apparatus for measuring the filling level of a liquid in a container comprising a transmitting device 1 which emits ultrasound transmission pulses, a receiving device 2 which receives the echo signals reflected at the surface of the liquid and an evalu... | 10/18/2011 |
| 8033169 | Device and method for qualitative determination of the cavitation energy of ultrasound in containers The present invention relates to a measuring chamber (6) for an ultrasonic bath (1) or for a container which is equipped with a low-frequency ultrasonic source (2) for cavitation generation, this measuring chamber being suitable for determining ... | 10/11/2011 |
| 8011241 | Level meter A level meter employs the radar concept for measuring the fill level of a medium in a container and incorporates an electric conductor system for conducting an electromagnetic signal into the container and returning reflected components of the electromagnetic signal... | 09/06/2011 |
| 8006554 | Filter and SPE plate clogged well detection The invention provides a method, a system, and a computer readable medium for determining the fill-ready status of one or more wells of a plurality of wells formed in a filter or solid-phase extraction (SPE) plate. In the method, a signal is directed toward a well o... | 08/30/2011 |
| 7980129 | Feed bin monitoring system and method A bin monitoring system functions both as a device for lifting the bin and as a weighing system for monitoring or measuring the level of feed in a feed bin. Various embodiments having a suspended load cell and methods of retrofitting the bin monitoring system to exi... | 07/19/2011 |
| 7963163 | Systems and methods for detecting fluids Fluids such as saline solution that are disposed in containers such as contact lens packages can be detected by directing ultrasonic energy at the container and receiving a return reflection of the ultrasonic energy. The ultrasonic energy and the return reflection c... | 06/21/2011 |
| 7946169 | Fluid level detector A fluid detector includes a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal and a lens with an upper portion and a lower portion. A housing is integral with an outer surface of the wall of a container and define... | 05/24/2011 |
| 7946168 | Acoustic volume indicator Acoustic volume indicators for determining liquid or gas volume within a container comprise a contactor to vibrate a container wall, a detector to receive vibration data from the container wall, a processor to convert vibration data to frequency information and comp... | 05/24/2011 |
| 7926344 | Ultrasonic fluid level sensing using a dry couplant An ultrasonic, non-invasive, bottom-up fluid level sensor for a container, includes: an ultrasonic transducer; and a dry couplant in acoustic communication with the transducer. The dry couplant is configured to adapt to the bottom surface of the container and the se... | 04/19/2011 |
| 7905143 | Ultrasonic fuel level monitoring system incorporating an acoustic lens An ultrasonic liquid level monitoring system includes an ultrasonic transducer unit that is mountable to a tank. The unit has an emitter to generate an ultrasonic beam passing through the wall of the tank. The emitter further receives an echo of the ultrasonic beam ... | 03/15/2011 |
| 7866209 | Fluid level regulator A biological specimen collection and transfer system, including a biological sample container configured for storing a biological fluid sample, a vacuum source, a specimen filter having an interior chamber and an opening in communication with the chamber, and a flui... | 01/11/2011 |
| 7861587 | Device for measuring the level of a liquid in a container with an ultrasonic transducer The invention relates to a device for measuring the level of liquid in a container by means of an ultrasonic converter, comprising an ultrasonic converter which is disposed at a distance from the base such that it radiates towards the surface of the liquid and also ... | 01/04/2011 |
| 7856876 | Fluid level measurement device The present invention relates to a device (10) for providing a gas composition compensated acoustic measurement of the level of a liquid (16) in a tank (18). The device comprises a transducer (14) arranged outside said liquid for transmit... | 12/28/2010 |
| 7849738 | Device for detecting interaction with an object A device and method for the detection of the interaction between two or more objects is disclosed. The device utilizes electrical impedance spectra measured from a piezoelectric element attached to one such object. Comparison of such spectra along a range of travers... | 12/14/2010 |
| 7823446 | Pulsed radar level gauging with relative phase detection A method for determining a process variable of a product in a tank based on a time delay of electromagnetic waves. The method further comprises forming a measurement signal comprising a sequence of values, each value representing a time correlation between a pulse o... | 11/02/2010 |
| 7819002 | Filling level measurement method according to the running time principle A reliable method for measuring a fill level of a fill substance in a container using a fill level measuring device working according to the travel-time principle, wherein, periodically, transmission signals are sent in the direction of the fill substance, their ech... | 10/26/2010 |
| 7819003 | Remote monitoring of fluid storage tanks Arrangement and method for monitoring a fluid storage tank which includes a housing defining an interior receivable of a removable fluid. An interior sensor system is arranged on the housing to obtain information about any fluid in the interior of the housing differ... | 10/26/2010 |
| 7805991 | Liquid sensing apparatus for a liquid container for supplying a liquid to a liquid consuming apparatus, and a liquid container in which the liquid sensing apparatus is built A liquid sensing apparatus includes a liquid sensing chamber 33 having a liquid inlet port that is in communication with an external liquid container in which a liquid is reserved, and a liquid outlet port that is in communication with a liquid consuming appa... | 10/05/2010 |
| 7802470 | Ultrasonic liquid level detector An ultrasonic liquid level detector for use within a shielded container, the detector being tubular in shape with a chamber at its lower end into which liquid from in the container may enter and exit, the chamber having an ultrasonic transmitter and receiver in its ... | 09/28/2010 |
| 7775106 | Non-contact radar based level measurement device A system and method for using a probe-based guided-wave radar sensor to measure fluid level in a container in a non-contact mode are provided. The system and method of the current invention replaces a wall section of the fluid container, such as a steel slurry tub w... | 08/17/2010 |
| 7770447 | Fluid level detector A fluid detector for determining a presence of a fluid within a container includes a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal and a lens with an upper portion and a lower portion. The piezoelectric elemen... | 08/10/2010 |
| 7739909 | Acoustic fluid level monitoring A product including a cryogenic container and an acoustic sensor positioned to sense the resonant frequency of the container and any liquid contents therein. ... | 06/22/2010 |
| 7721600 | Flow measurement apparatus and method A flow measurement cartridge assembly for measuring liquid flow in a partially filled channel and a method for measuring liquid flow using the cartridge assembly, the cartridge assembly comprising: a frame for insertion into a discharge opening of the channel; a lev... | 05/25/2010 |
| 7694560 | Non-invasive bottom up continuous liquid level transmitter Apparatus for measuring the level of liquid in a container has a substrate on which a plurality of piezoelectric elements are mounted that are to transmit ultrasonic energy upwardly through the bottom of a container placed on and supported by the substrate into the ... | 04/13/2010 |
| 7681445 | Apparatus for determining and/or monitoring at least one process variable An apparatus for determining and/or monitoring at least one process variable of a medium and includes: A mechanically oscillatable unit, which executes mechanical oscillations in a direction and which is secured at a seating. Included is an exciting/receiving unit, ... | 03/23/2010 |
| 7665357 | Accretion alarm for field devices A field device for monitoring and/or determining a process variable of a medium, wherein the process variable preferably is fill level, viscosity or density of the medium. The field device includes: an oscillatable unit; a driving/receiving unit, which excites the o... | 02/23/2010 |
| 7640799 | Potential separation for fill level radar For safety reasons the potential of an electrical supply line of a radar sensor may be separated from the potential of the fill level container. A fill level radar with potential separation includes a separation element for insulating the aerial from a feed device. ... | 01/05/2010 |
| 7607347 | Fluid level detector A fluid detector includes a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal and a lens with an upper portion and a lower portion. A housing is integral with an outer surface of the wall of a container and define... | 10/27/2009 |
