Buoyancy Type Patents (Class 73/309)
  • Patent number: 10830680
    Abstract: A tension applying device is configured to fix a test substance between a lower fixing part and an upper fixing part, and apply tension between the lower fixing part and the upper fixing part while the test substance is immersed in liquid, wherein the tension applying device includes: a container storing the liquid; a lifter fixed to the lower fixing part and configured to immerse the test substance into the liquid; and a float coupled to the upper fixing part and configured to float in the liquid so as to apply tension to the test substances.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: November 10, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshihiro Yamagata
  • Patent number: 10800647
    Abstract: A system and related method of filling tanks is provided so that tanks do not attain an overfill condition and/or so the tanks are filled to a maximum specified capacity. The system includes an adjustable float switch having a float configured to float in liquid that is filled into a trailer tanker, a mix tank, a frac tank, a storage tank and a variety of other tanks. The float can be set so that when the liquid attains a maximum level and associated volume, the float switch opens so that pressurized air can be communicated from it to a pneumatically actuated tanker valve disposed in a supply line. This shuts off the flow of liquid through the supply line and into the tank. The system can be operable in a various modes, such as a filling mode, a filled mode, a manual emergency shutoff mode and/or a manual reset mode.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: October 13, 2020
    Assignee: Evergreen Environmental Services, LLC
    Inventor: Paul Borg
  • Patent number: 8991558
    Abstract: The present invention is directed to lubrication system having a reservoir having a body. A follower is moveably disposed in the body. The system further comprises an alarm system having an electrical switch operably associated with the follower. The alarm generates a signal when the follower is at a predetermined location in the body. The alarm system may generate a signal when the follower is at a lower location in the body such as when the reservoir has an amount of lubricant representing a predetermined amount of usage time remaining. The alarm system may also generate a signal when the follower is at an upper location in the body such as when the reservoir is filled with lubricant wherein the signal acts to automatically interrupt the fill of lubricant.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: March 31, 2015
    Assignee: Metco Engineering, Inc.
    Inventor: Patrick J. Murphy, Sr.
  • Patent number: 8967191
    Abstract: A leak detection system for the rapid and accurate detection of the mean surface level change of a body of liquid is provided. The system is capable of sensing mean surface level changes under static or turbulent surface conditions. In one embodiment, the system includes a rigid walled sensor pod with at least one inner pod cavity that is so positioned to receive liquid from a body of liquid such that dynamic equilibrium is possible and maintained between the mean surface level of the body of liquid and the amount of liquid in the inner cavity. The system further includes a sensor assembly having a stiction free float operating in conjunction with a strain gauge, and microprocessors applying algorithms to process, display, and report the sensor data in accordance with the needs of the end user or to initiate actions for automated control functions.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: March 3, 2015
    Inventors: Richard DeVerse, Van R. Malan
  • Publication number: 20140319931
    Abstract: A fluid level detection device comprising an elongated shaft having a plurality of sensors and associated switches on a distal end thereof. The distal end of the shaft extends into a liquid reservoir with the switches configured to detect multiple predetermined fluid levels. The first fluid level detected is a warning level indicating that the level of fluid in the reservoir is low and results in a warning indication. The second fluid level detected is for a shutoff threshold that results in shutdown of the device using the fluid in the reservoir and a shutdown indicator.
    Type: Application
    Filed: April 29, 2014
    Publication date: October 30, 2014
    Applicant: RELIABLE PUMP STOP, INC.
    Inventor: Matthew D. Kouri, Sr.
  • Patent number: 8776574
    Abstract: A fluid level measurement apparatus supports multiple fluid level sensors of different types, each of which detects a level of fluid and produces an output indicative of the detected fluid level in a different way. The fluid level measurement apparatus is connected to any one of the supported fluid level sensors to measure the fluid level. The fluid level measurement apparatus includes a calculation circuit, multiple output circuits, a determination circuit, and a selection circuit. The calculation circuit calculates the fluid level from a detection voltage. Each output circuit generates the detection voltage based on the output of a corresponding fluid level sensor. The determination circuit determines the connected fluid level sensor. The selection circuit selects the output circuit corresponding to the determined fluid level sensor and allows the calculation circuit to obtain the detection voltage generated by the selected output circuit.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: July 15, 2014
    Assignee: Denso Corporation
    Inventor: Isao Miyagawa
  • Patent number: 8689627
    Abstract: The invention discloses a low liquid level detecting device comprising a float sensor and a casing. The casing has first to third chambers formed between an upper wall and a bottom wall. The top portion of the first chamber is formed with a top opening. The bottom portion of the first chamber communicates with the bottom portion of the second chamber. The top portion of the second chamber communicates with the top portion of the third chamber. The bottom portion of the third chamber is formed with a bottom opening. A float sensor is mounted inside the third chamber. A drain hole is formed through the bottom part of a chamber wall surrounding the third chamber. A method for detecting a low liquid level using the above low liquid level detecting device is also disclosed.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: April 8, 2014
    Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
    Inventors: Jizhou Wu, Pengjin Lin
  • Publication number: 20140041449
    Abstract: Disclosed is a battery pack assembly including an apparatus for detecting water accumulation inside an installation region in which a battery pack is installed. The battery pack assembly includes a watertight case installed on a bottom surface of the water accumulation detecting apparatus and assembled with the battery pack therein. The water accumulation detecting apparatus includes a body including a water inlet opening through which water accumulated in the installation region flows in. A floating member floated by buoyancy of the water flowing in the body. A switch unit is configured to generate a current when the floating member increases up to or beyond a predetermined height. An elastic member is configured to connect the floating member and the bottom surface of the body so that the floating member is positioned at a predetermined position when buoyancy of the water does not affect to the floating member.
    Type: Application
    Filed: December 13, 2012
    Publication date: February 13, 2014
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventors: Hae Kyu Lim, Yooncheol Jeon, Jeong Hun Seo, Yongjin Lee
  • Patent number: 8643496
    Abstract: A contact is provided for a fluid level detection apparatus. The contact includes a contact support spring for rotating in response to a change in fluid level. The contact support spring includes a cantilevered spring arm having a proximal end to be fixed to a holder and a free end, and a contact support which is provided at the free end. First and second contacts are attached to the contact support in first and second positions, respectively, the first position being set at one end opposite to an end at which the second position is set. The joining position of the contact support and cantilevered spring arm is set so that a pressing load applied to the first and second contacts on the contact support by the flexure displacement of the contact support spring falls within a predetermined range.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: February 4, 2014
    Assignee: Yazaki Corporation
    Inventor: Toshiaki Fukuhara
  • Patent number: 8596119
    Abstract: Methods and apparatus are provided for measuring the liquid level within a reservoir based on the buoyancy force that the liquid imparts to a float member. a float member is at least partially submerged into a liquid in a reservoir. The float member is configured, upon being at least partially submerged into the liquid to a depth, to have a buoyancy force exerted thereon by the liquid that is proportional to the depth. The buoyancy force is transferred from the float member to a sensor, via a force transfer mechanism that is movable relative to the float member and the sensor.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: December 3, 2013
    Assignee: Honeywell International Inc.
    Inventors: Basavaraja M. Teli, Saravanan Sadasivan
  • Patent number: 8448750
    Abstract: A machine lubrication system that includes an assembly for sensing the level of lubricant in the reservoir, the reservoir including a follower that travels axially within the reservoir and substantially conforms to an inner cross-sectional dimension thereof, a magnet being attached to the follower for actuation of a plurality of magnetically actuated switches. The system may include a first and second level sensor, which may be independently connected to one or more power sources, where the first level sensor may be associated with an operator station, and the second level sensor may be associated with a remote indicator.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: May 28, 2013
    Assignee: Caterpillar Inc.
    Inventors: Susan J. Gaugush, Ted J. Loeffelholz, James Frances Blubaugh, Douglas D. Long
  • Patent number: 8443664
    Abstract: An equalizing tank for a hydraulic motor vehicle brake system, with a housing including a housing upper part and a housing lower part, and with a device for monitoring the fluid level in the equalizing tank, the device including a switching unit which is fastened to the housing and has a plug-in connector and a contact carrier, a portion of which projects into a guide pipe which extends into an interior space of the tank, and a sensor element or switching element which is arranged on the contact carrier in the region of the guide pipe and which can be switched by a transmitter in a switching point at which the switching unit generates a signal for an electronic control unit.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: May 21, 2013
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Johann Ludwig, Hans-J├╝rgen Neumann, Swen Ottmann, Christoph Schiel, Peter Tandler, Werner Krebs, Barbara Schmidt
  • Patent number: 8434634
    Abstract: A cap may include a threaded inner body and an outer cover. A ratchet mechanism may be operatively positioned between the inner body and the outer cover to directly transmit rotation from the outer cover to the inner body in the cap-unthreading direction and to transmit no more than a predetermined amount of torque from the outer cover to the inner body in the cap-threading direction. A gauge assembly may include a float, an indicator dial, and a pointer. The float is supportable at a level of fluid within the container, and the pointer is movable in response to movement of the float with the level of fluid in the container. The pointer cooperates with the indicator dial to indicate the level of fluid in the container. A translucent crystal may be positioned over the indicator dial and the pointer. The crystal may be fixed relative to the inner body.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: May 7, 2013
    Assignee: Bemis Manufacturing Company
    Inventors: Kevin W. Bork, Michael J. Holz
  • Patent number: 8261612
    Abstract: An apparatus for determining the fluid level of a container, such as an accumulator, may include both a remote quantity indicator and a direct quantity indicator. The remote quantity indicator may include a remote dial at the end of a flexible cable or an electrical signal receiver receiving an electrical signal from a rotary variable differential transformer (RVDT), such as a potentiometer. The RVDT type of indicator may include an electrical connector on the accumulator to attach an electrical cable to carry the quantity level signal. The direct quantity indicator may include a dial directly mounted on the accumulator. The remote/direct quantity indicators may include, for example, one of the following three combinations: 1) a dial directly on the accumulator and a remote dial at the end of a flexible cable; 2) an RVDT output and a dial directly on the accumulator; and 3) an RVDT output on an accumulator, a remote dial at the end of a flexible cable and a dial directly on the accumulator.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: September 11, 2012
    Assignee: Honeywell International Inc.
    Inventors: Steven R. Eccles, Filip Reinis, Amanda L. Anthony, Mike M. Masoudipour
  • Publication number: 20120204636
    Abstract: Methods and apparatus are provided for measuring the liquid level within a reservoir based on the buoyancy force that the liquid imparts to a float member. a float member is at least partially submerged into a liquid in a reservoir. The float member is configured, upon being at least partially submerged into the liquid to a depth, to have a buoyancy force exerted thereon by the liquid that is proportional to the depth. The buoyancy force is transferred from the float member to a sensor, via a force transfer mechanism that is movable relative to the float member and the sensor.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 16, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Basavaraja M. Teli, Saravanan Sadasivan
  • Patent number: 8220482
    Abstract: A leak detection system for the rapid and accurate detection of the mean surface level change of a body of liquid is provided. The system is capable of sensing mean surface level changes under static or turbulent surface conditions. In one embodiment, the system includes a rigid walled sensor pod with at least one inner pod cavity that is so positioned to receive liquid from a body of liquid by way of an opening below the surface of the liquid such that dynamic equilibrium is possible and maintained between the mean surface level of the body of liquid and the amount of liquid in the inner cavity. The system further includes a sensor assembly having a stiction free float operating in conjunction with a strain gauge, and microprocessors applying algorithms to process, display, and report the sensor data in accordance with the needs of the end user or to initiate actions for automated control functions.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 17, 2012
    Assignee: Kona Labs LLC
    Inventors: Richard DeVerse, Van R. Malan
  • Patent number: 8196466
    Abstract: A sensor for measuring fluid level is provided that includes a float, which may be steel or another material that affects magnetic flux. The sensor further includes a housing defining a cavity configured to receive the float. The housing may be, but need not be, tubular, and the cavity may be cylindrical. At least one magnetic coil is wound to the housing along the cavity. The coil may be wound around the housing. The float is positionable in the fluid to move within the cavity in relation to fluid level.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: June 12, 2012
    Assignee: Eaton Corporation
    Inventors: Gerritt VanVranken Beneker, Robert Dean Keller
  • Patent number: 8171786
    Abstract: 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 present in the tank, presented in an easy-to-interpret picture display that can be remotely located from the tank.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: May 8, 2012
    Assignee: Petroleum Recovery Services, LLC
    Inventor: Steve Y. Burris
  • Patent number: 8141421
    Abstract: A tank or vessel volume measurement apparatus that includes multiple buoyancy elements. The buoyancy elements can be placed within a perforated tube to reduce any effects from turbulent flow within the tank. The multiple buoyancy load sensors are each made of different density or cross sections to cancel out any accumulation of contamination that may collect on the buoyancy elements placed within the fluid and to determine the density or specific gravity of the fluid within the tank. The buoyancy elements are attached to a load sensor or strain gauge that measures the weight or load from the buoyancy element. Temperature of other sensors can be placed on the buoyancy elements or within the tank to collect other readings or to adjust for temperature variations. The buoyancy elements can be fabricated in pieces and assembled on site or within the tank to accommodate taller tanks or height restrictions.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: March 27, 2012
    Inventor: Alan Paine
  • Patent number: 8117911
    Abstract: This invention relates to bulk liquid storage tanks, and in particular to an improved tank gauge for measuring the amount of liquid within the tank and for monitoring the movement or settling of the storage tank.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: February 21, 2012
    Inventor: Dennis Rose
  • Patent number: 8096177
    Abstract: 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, presented in an easy-to-interpret picture display that can be remotely located from the tank.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: January 17, 2012
    Assignee: Petroleum Recovery Services LLC
    Inventor: Steven Y. Burris
  • Publication number: 20110197669
    Abstract: A drum maintenance system for use in an imaging device includes a reservoir for the storage of release agent used by the drum maintenance unit. The reservoir includes a bottle, an end cap, and a float sensor. The float sensor operates to detect the release agent in the bottle reaching a predetermined minimum level.
    Type: Application
    Filed: April 26, 2011
    Publication date: August 18, 2011
    Applicant: XEROX CORPORATION
    Inventors: Edward F. Burress, Michael Joel Edwards, Joseph Benjamin Gault, Michael Cameron Gordon, Devin Richard Bailly, Frank Alexander Weissig, Barry Daniel Reeves
  • Patent number: 7987710
    Abstract: A pressure vessel 12 with a CO2 liquid level indicator 14, for use with a paintball marker 10, includes a magnetic float assembly 42 disposed within the pressure vessel 12 and adapted to float on liquid phase CO2 39 contained within the pressure vessel 12, in combination with a magnetically sensitive indicator 44 on an outer surface 40 of the pressure vessel 12 and which is adapted to detect and to display the location of the magnetic float assembly 42 within the pressure vessel 12. When connected to a conventional paintball marker 10, the pressure vessel 12 magnetically shows the indicated location of the magnetic float assembly 42, thereby showing the amount of liquid phase CO2 39 remaining within the pressure vessel 12. This remaining amount of liquid phase CO2 39 can be correlated to an approximate number of additional paintball rounds that can be shot before the CO2 is depleted.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: August 2, 2011
    Assignee: Gayston Corporation
    Inventor: Mark W. Stone
  • Patent number: 7880625
    Abstract: A liquid level warning device with a separate audible alarm is disposed in a liquid tank for indicating the amount of liquid in the tank. The device also includes a plurality of float switches disposed at pre-selected levels within the tank and a plurality of LED's for indicating the level of liquid in the tank. A separate audible alarm independent of the visual indicators sounds an alarm when the tank is at a pre-selected level. A float switch is also disclosed.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: February 1, 2011
    Inventor: Abdulmohsen Ahmed Almoumen
  • Publication number: 20100307596
    Abstract: The present invention provides a liquid apparatus (1) with a housing (2) with a liquid conduit (3) therethrough and at least one moveable element (4) slideably coupled to the housing (2) via at least one coupling (5). The coupling (5) includes at least one pair of mutually magnetically interactive portions (6, 7), one portion (6) located as at least part of the moveable element (4), the other portion (7) at least partially formed as a buoyancy float (8) in the liquid conduit (3), wherein slideable movement of the moveable element (4) produces a corresponding movement of the coupling portion (5) within the housing (2) and in use the position of the buoyancy float (8) is variable by adjusting the total mass of the moveable element (4).
    Type: Application
    Filed: September 6, 2007
    Publication date: December 9, 2010
    Inventor: Geoffrey Neil McConnell
  • Publication number: 20100288042
    Abstract: This invention relates to bulk liquid storage tanks, and in particular to an improved tank gauge for measuring the amount of liquid within the tank and for monitoring the movement or settling of the storage tank.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 18, 2010
    Inventor: Dennis Rose
  • Publication number: 20100269760
    Abstract: Apparatus and related methods of monitoring a target aquatic organism are disclosed herein. In various aspects, the apparatus may include support media that supports the growth of a target aquatic organism, and a buoy adapted to float upon a water surface. The water surface may define a waterline with respect to the buoy, and the buoy may cooperate with the support media such that a waterline position of the waterline is generally indicative of a weight of the support media. The methods, in various aspects, may include the steps of positioning a support media in an aqueous environment, the support media supports the growth of a target aquatic organism, and determining a waterline position defined by a water surface with respect to a buoy, the waterline indicating a weight of the support media.
    Type: Application
    Filed: April 3, 2010
    Publication date: October 28, 2010
    Inventor: Alan W. Cibuzar
  • Patent number: 7748269
    Abstract: The invention discloses a low liquid level detecting device comprising a float sensor and a casing. The casing has first to third chambers formed between an upper wall and a bottom wall. The top portion of the first chamber is formed with a top opening. The bottom portion of the first chamber is fluid communicated with the bottom portion of the second chamber. The top portion of the second chamber is fluid communicated with the top portion of the third chamber. The bottom portion of the third chamber is formed with a bottom opening. A float sensor is mounted inside the third chamber. A drain hole is formed through the bottom part of a chamber wall surrounding the third chamber. A method for detecting a low liquid level using the above low liquid level detecting device is also disclosed.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: July 6, 2010
    Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
    Inventors: Jizhou Wu, Pengjin Lin
  • Patent number: 7707882
    Abstract: An insulation beverage container (10) is provided and includes a gauge (40) for indicating the level of beverage held in the container (10). The gauge (40) includes a float (42) positioned within the container (10), a visual indicator (44) extending outside of the container (10), and a link (46) connecting the float (42) to the indicator (44) to move the indicator (44) with the float (42) as the position of the float (42) varies with the level of the beverage in the container (10).
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: May 4, 2010
    Assignee: Thermos L.L.C.
    Inventor: Marvin Lane
  • Publication number: 20100089306
    Abstract: A fuel gauge is adapted to extend into a fuel tank to enclose liquid fuel in the fuel tank and to sense the level of liquid fuel in the fuel tank. The fuel gauge includes a fuel-level indicator having a needle and a buoyant float exposed to the liquid fuel in the fuel tank. The needle moves in response to changes in the level of liquid fuel in the fuel tank sensed by the buoyant float.
    Type: Application
    Filed: September 4, 2009
    Publication date: April 15, 2010
    Applicant: STANT MANUFACTURING INC.
    Inventors: Gary L. Dunkle, Louis T. Frank
  • Publication number: 20090272188
    Abstract: A fluid analysis system for use with a storage tank containing a plurality of fluids. The storage tank includes a drain outlet near the bottom of the tank and an opening at the top of the tank. The fluid analysis system includes a tube supported by the tank, at least one pressure sensor at the bottom of the tank, a fluid level sensor, and a processor. The tube extends from the opening of the tank to a position the bottom of the tank and supports the pressure sensor and the fluid level sensor. The fluid level sensor includes a reed switch assembly supported inside the tube and a magnetic float buoyantly supported on the exterior of the tube. The processor receives the pressure of the fluid detected by the pressure sensor and the fluid level detected by the fluid level sensor. The processor can determine a height of each of the fluids in the storage tank using the detected fluid pressure and the detected fluid level.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 5, 2009
    Applicant: Well Tech Instruments, LLC
    Inventors: Paul Byrne, Phillip P. Harris
  • Patent number: 7451773
    Abstract: The present invention provides a dishwasher, by which an appropriate quantity of water can be stably supplied. The present invention includes a sump storing water therein, a floater received in a chamber having a predetermined volume, the floater ascending according to a rise of a water level of the sump, a switch preventing the water from being oversupplied to the sump, a pushing member lifted by the floater to turn on the switch by pushing the switch, and an off-delay part delaying the switch to be turned off on a descent of the floater.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: November 18, 2008
    Assignee: LG Electronics, Inc.
    Inventor: Jong Chul Bang
  • Patent number: 7401571
    Abstract: A gutter system includes an indicator for indicating that the gutter system is clogged or partially clogged. The indicator includes a floating device such as a ball. There is provided a retainer that retains the ball within the gutter system and in the vicinity of a downspout and downspout opening that forms a part of a gutter system. The retainer comprises a housing of an open construction and includes a bottom, sidewall structure and a top portion. Since the housing is an open construction, water passing through the gutter can normally flow through the housing. When the gutter system is clear and does not have any substantial obstructions, it follows that the water accumulation within the gutter will be relatively small. However, when the gutter system is clogged or partially clogged, then there will be some accumulation of water in the gutter system. When there is accumulation of water, the floating device will float to an upper elevated position where the same can be seen from ground level.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: July 22, 2008
    Inventor: Tony William Creed
  • Patent number: 7377163
    Abstract: Two pairs of regulating means, that is, the first stopper and the second stopper, which regulate a rotary angle range of the magnet holder when the first stopper and the second stopper come into contact with the stopper of the arm integrally fixed to the magnet holder, are provided in the body which is a fixing member, and the rotary angle range of the magnet holder regulated by one pair of stoppers is made to be different from the rotary angle range of the magnet holder regulated by the other pair of stoppers. Due to the foregoing, when the expensive body is made to be a common part and a plurality of types of inexpensive arms are manufactured, the fuel level gauge can be provided, an increase in the manufacturing cost of which is suppressed, which can cope with rotary angle ranges of the plurality of types of arms.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: May 27, 2008
    Assignee: DENSO CORPORATION
    Inventor: Isao Miyagawa
  • Patent number: 7278293
    Abstract: A probe for deployment in a fluid measures produces an output representative of a parameter associated with the fluid. The probe includes a density control system to control a density of the probe and a locating system to track a location of probe in the fluid.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: October 9, 2007
    Assignee: Rosemount, Inc.
    Inventors: Gabriel Lazaro Sierra, William Thomas Anderson, Edward Charles Hajek
  • Patent number: 7259384
    Abstract: Systems and methods for fluid level detection are disclosed. In one embodiment, a sensor assembly includes at least one optical fiber adapted to at least one of transmit and receive an optical signal, and a moveable float member. The float member is adapted to move in a first direction as the fluid level increases and in a second direction as the fluid level decreases. The float member blocks the optical signal at a first value of the fluid level, and allows the optical signal to pass at a second value of the fluid level. The presence or absence of the optical signal is detected to determine the level of fluid.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: August 21, 2007
    Assignee: The Boeing Company
    Inventors: Sham S. Hariram, Sharanpal S. Sikand
  • Patent number: 7216537
    Abstract: An optical liquid measuring system for measuring the amount of flammable liquid in a storage tank consisting of a pair of encoder disks that are operatively connected to a pair of floats through a pair of pulley systems. The floats are designed so that the first float will float on top of flammable liquid such as gasoline, and the second float will float on top of water. Optical encoder reader heads or optical connectors are located proximate to the respective encoder disks to receive light that is reflected by or transmitted through the encoder disks. The optical connectors include a plurality of optical fibers that receive the light from the encoder disks and transmits signals to a CPU. The CPU then takes the information derived from the received signals and uses an algorithm to accurately calculate the amount of gasoline and water in the storage tank.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: May 15, 2007
    Assignee: Optosense Technologies, Inc.
    Inventors: Mark Margolin, Malcolm Hodge
  • Patent number: 7066024
    Abstract: A float adapted to track an interface between two liquids of differing density, includes a hollow buoyant body having an interior cavity adapted to retain liquid. At least one upper access opening is provided in the body, which is adapted to permit filling of the interior cavity with liquid. The interior cavity is capable of holding sufficient liquid to retard the buoyancy of the body. By filling the interior cavity with a liquid of a first density, the hollow buoyant body can be made to float at an interface with a lighter liquid of a second density.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: June 27, 2006
    Inventor: Brian Watchel
  • Patent number: 7021138
    Abstract: A fuel feeding apparatus is provided with a cap body for closing an opening of the tank, and a liquid level detector that is attached to the cap body and detects a liquid level of the fuel. The liquid level detector includes a floating unit immersed in the fuel and a strain gauge embedded in the floating unit in proximity to the cap body to detect a compression stress caused by buoyant force of the floating unit.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: April 4, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiroshi Yoshioka
  • Patent number: 6945108
    Abstract: The present invention relates to a fuel level system for an automobile, and more particularly, to a fuel level system for use in informing a driver of the amount of remaining fuel in a fuel tank of an automobile using gasoline, light oil, gas or the like, wherein a flowing electric current is increased in a contact of a level sender unit. The fuel level system of the present invention comprises a level sender unit installed in a fuel tank of the automobile, a fuel gauge, and a resistor installed inside or outside the level sender unit within the fuel level system to increase an electric current flowing through a contact of the level sender unit.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: September 20, 2005
    Assignee: Korea Automotive Fuel Systems Ltd.
    Inventors: Hyun Bok Kim, In Seok Sohn, Young Chol Chol, Han Mu Kim
  • Patent number: 6928862
    Abstract: A dual-phase level monitoring (DPLM) instrument that provides continuous signals that enables determination of the location of the top surface of the lighter of two immiscible fluids (the product) and the hydrostatic pressure below the total fluid column of both immiscible fluids. By knowing the fluid specific gravities, the output signals are processed to yield the location of the air/product and liquid/liquid interfaces, and the depth of the lighter phase. The instrument is intended for use in groundwater monitoring wells with a light non-aqueous phase liquid (product) and tanks or vessels with dual-phase liquids and level monitoring and/or control issues. The DPLM instrument includes a first pressure transducer situated beneath the surface of the liquid with a greater specific gravity, which will typically be ground water. A level element with a float selected so as to be buoyant and float on the surface of the lighter fluid is positioned above the first pressure transducer.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: August 16, 2005
    Inventor: Bryce V. Robbins
  • Patent number: 6880398
    Abstract: A fuel level detection device detects the level of fuel in the fuel tank. The fuel level detection device comprises a body including at least one mounting station and a fuel level detection unit. The fuel level detection unit includes a base and a float mounted relative to the base so as to have varying position relative to the base depending on the level of fuel in the fuel tank. The fuel level detection unit further contains a link coupling the float to the base and a sensor producing a signal indicative of the position of the float within the fuel tank. The fuel level detection unit is capable of being disposed at more than one position on the body.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 19, 2005
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Yasuo Okamoto
  • Patent number: 6851314
    Abstract: An apparatus and method for detecting water loss from a swimming pool includes a first container having an upper end, a lower end, an inner cavity and at least one opening allowing swimming pool water to flow in and out of said inner cavity; a substantially waterproof load cell positioned within the inner cavity of said first container, for measuring weight bearing thereon; and a second container having an upper end, a lower end, and an inner cavity closed to water flow, said second container positioned within the inner cavity of said first container having its lower end upon said load cell so as to bear weight thereon.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: February 8, 2005
    Assignee: American Leak Detection, Inc.
    Inventor: John Bromley
  • Patent number: 6813946
    Abstract: Liquid sensing apparatuses and liquid sensing methods are described. In some embodiments, a liquid sensing apparatus includes a magnetic element; a source magnetic field, which produces on the magnetic element a magnetic force with a component that opposes a gravitational force on the magnetic element; and a structure configured to prevent rotation of the magnetic moment of the magnetic element relative to the magnetic field, e.g., so that the magnetic force remains greater than the gravitational force. The apparatus is capable of sensing the level of a liquid using a combination of magnetic force and buoyancy force.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: November 9, 2004
    Assignee: Markem Corporation
    Inventor: Frances H. Benton
  • Patent number: 6802219
    Abstract: The present invention relates to a segmented cylindrical tide staff system [11] for erection at remote areas for dynamic calibration of electronic tide meters and computer models of tides, said tide staff system consisting of plurality of cylindrical tubes [12], said cylindrical tube being coupled to a flange [13] at its end through a circular orthogonal hole [20] drilled on a flat surface of the flange, said flange being provided with plurality of equally spaced slots [15] drilled on the flat surface of the flange, an outwardly protruding tide indicating arm [14] being mounted on the flange wherein said tide indicating arm consists of two mutually orthogonal planes [22] and [23], wherein plane [22] is perpendicular to the axis of the tide staff and plane [23] is parallel to the axis of the tide staff, said perpendicular plane [22] being provided with a mounting terminal [21] and a circular
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: October 12, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Antony Joseph, Shivanand Prabhudesai, Suryakant Tengali, Ehrlich Desa, Prakash Mehra, Amol Sukerkar, Vijay Kumar, Robert Monteiro
  • Patent number: 6786091
    Abstract: An overflow detection device is capable of determining whether liquid outside of the device has reached a predetermined level associated with an overflow condition. A container has a closed end and a capped end opposite the closed end. The container has an enclosing wall which extends from the closed end to an open or capped end to define an interior region. A hole or holes are formed in the enclosing wall. The holes are positioned a predetermined distance from the closed end of the container. The holes permit flow of the liquid into the interior region of the container when the liquid level reaches the predetermined level. A flotation piece is situated in the interior region of the container. The flotation piece is capable of floating on liquid which has flowed into the interior region. A visual indicator piece is coupled to or integral with the flotation piece. The visual indicator piece rises with the flotation piece when the level of the liquid contained in the interior region of the container rises.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: September 7, 2004
    Inventor: Amin S. M. Aleali
  • Publication number: 20040050157
    Abstract: A monitor for remote reading of liquid volumes in pressurized tanks utilizes a hollow buoyant displacement probe extending downwardly from a load cell carried adjacent a top port in the tank. The buoyant probe is optionally formed in detachable segments so that it can be assembled on site at the time of installation. The load cell is suspended from a flange cover acting as a closure for the tank port so that the load cell is freely pivotable on perpendicular horizontal axes, insuring that it is always oriented horizontally. A temperature-reading string is positioned in the open hollow center of the probe and has three spaced temperature sensing units along its length.
    Type: Application
    Filed: July 18, 2003
    Publication date: March 18, 2004
    Inventors: Robert C. Scott, L. Scott Hazelwood, Kenneth Stephens
  • Patent number: 6705163
    Abstract: A gauge assembly for use in measuring the level of a liquid in a storage tank is disclosed. The assembly includes a housing having an interior and having a lower opening communicating with that interior. A flanged spool is rotatably mounted within the housing and has wound thereabout a filament extending through the opening with its free end attached to a float element within the tank. A spring is connected to the spool and exerts a rotating force for winding the filament under the spool, and a removable strip of adhesive tape has opposite end portions adhering to the housing and a central portion adhering to the spool for locking for releasably securing the spool against rotation. A second strip of adhesive tape may also be used for detachably securing the filament to the housing.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: March 16, 2004
    Assignee: Morrison Bros. Company
    Inventors: Michael D. Lattner, Adam J. Koehler
  • Publication number: 20030192599
    Abstract: A fuel pump apparatus is made free from the influence of height fluctuations of the surface of fuel in a fuel tank by providing a fuel inlet window in the side wall of a float chamber for containing a fuel gauge, which is provided inside the side wall of a housing. The fuel inlet window provides communication between the float chamber and the fuel storage chamber in the fuel tank. Even when there are height fluctuations of the surface of fuel in the fuel tank due to vibrations or turning during running of the automobile, the height fluctuations of the fuel surface are damped in the float chamber because the fuel inlet window acts as a buffer to prevent direct influence of the height fluctuations of the fuel surface.
    Type: Application
    Filed: April 11, 2003
    Publication date: October 16, 2003
    Inventor: Akira Aoyama
  • Patent number: 6588272
    Abstract: A redundant level measuring system comprises a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber. A float including a magnet in the chamber rises and falls with material level in the chamber. A magnet actuated visual indicator is mounted to the chamber for indicating level of the magnet in the chamber. A measurement instrument includes a probe and a measurement circuit. The instrument is mounted atop the chamber with the probe extending downwardly into the chamber. The measurement circuit measures a characteristic of the probe representing level of the material in the chamber. A shield in the chamber isolate the float from the probe.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: July 8, 2003
    Assignee: Magnetrol International, Inc.
    Inventors: Michael J. Mulrooney, Boyce M. Carsella, Jr., Paul D. Myatt, Don P. Sanders