Liquid Level Patents (Class 116/109)
  • Patent number: 10024440
    Abstract: There is disclosed a fuel tank valve assembly 24 for a fuel tank 4. The fuel tank valve assembly comprises a discharge valve 30 which in normal operation is closed, and which can be opened to discharge fluid from the fuel tank; and a water passageway 56 across which extends a membrane 60 which is permeable to water but impermeable to fuel. There is also disclosed a fuel tank 4 comprising a fuel tank valve assembly 24.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 17, 2018
    Assignee: Filton Systems Engineering Ltd
    Inventors: Benjamin Richardson, John Austin, Alexander Colwood, Christopher Cavey
  • Patent number: 9880320
    Abstract: A tank inventory signaling apparatus that has gas cylinder tanks stored on a pad having an array of spots to mark tank placement. Tanks are placed directly over the spots in a grid of rows and columns. Sensors below each spot act as weight or proximity sensors indicating the presence or absence of a tank. The sensors are connected to logic that monitors the state of all sensors. Tank inventory is inferred by changes of state of the sensor grid since it is necessary to change sensor state to remove a tank. Sensor states are reported to a remote server having associated tank management and supply software and route management software. In this manner, local tank usage can be tracked at remote locations for resupply of tanks and delivery of replacement tanks can be optimized.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: January 30, 2018
    Assignee: RATERMANN MANUFACTURING, INC.
    Inventor: George W. Ratermann
  • Patent number: 9777716
    Abstract: A pump for exchange of fluid between an apparatus reservoir and a reserve reservoir. The pump may have an elongated tubular body with a central bore with a reservoir end portion, an inlet end portion and an intermediate barrel portion. A piston assembly with a driving piston with a stem member with nonmagnetic properties attached and the stem member has a tubular extension member attached with all in longitudinal axis alignment slidably positioned in the central bore to position the driving piston adjacent to an electromagnetic coil assembly that is positioned around the intermediate barrel portion and to position the tubular extension member for a reservoir end to extend outwardly at the reservoir end portion opening. An output tubular member with a pressure relief valve is attached to an output port in a side wall of the reservoir end portion positioned for release of fluid through an output port.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: October 3, 2017
    Inventors: Richard Nelson, Robert M Nelson, Robert K Dyas
  • Patent number: 9630727
    Abstract: A drop zone marker includes a parachute, a first light module connected to the parachute by a first length of cord and a second light module connected to the first light module by a second length of the cord. A ballast is connected to the second light module by a third length of the cord is provided for pulling downwardly the drop zone marker. The parachute is configured to include an integral packing/deployment bag within which all components of the drop zone marker are contained up until deployment.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: April 25, 2017
    Assignee: Arcachon Holdings LLC
    Inventors: Gary Leegate, Marcia Baldwin
  • Patent number: 9587533
    Abstract: An oil level display device is fitted such that a float guide accommodating a float is attached to an oil filler neck and is plugged with a float cap. To check the amount of oil, the float cap is removed and the position of the float is checked. If a sufficient amount of oil is stored, an upward force derived from oil buoyancy is larger than a downward force of the own weight of the float, from among the forces that act on the float. The float thus protrudes beyond a large-diameter portion upon removal of the float cap from the float guide.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 7, 2017
    Assignee: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventor: Masanori Noguchi
  • Patent number: 9248690
    Abstract: A nib assembly for a writing instrument comprises a ferrule having a first end and a second end. The ferrule includes an inner ferrule wall and an outer ferrule wall, the inner ferrule wall and the outer ferrule wall being separated by a well having an opening. A cap has a first end, a second end, and a first cap wall. The first cap wall is sized and shaped to be at least partially received within the well, the first cap wall being disposed at least partially within the well, between the inner ferrule wall and the outer ferrule wall, when the cap is coupled to the ferrule.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: February 2, 2016
    Assignee: SANFORD, L.P.
    Inventors: Carmen O. Lira-Nunez, Katherine J. Radville, Andrew M. Bielecki
  • Patent number: 8869611
    Abstract: A dual mode water leak detector is combined with a HIVAR air condition system or unit. The air conditioning unit or system uses chilled water for cooling or hot water or electric coils for heating and employs means for supplying heated or cooled air into a floor void and channeling return air to designated vents under the floor or through a false ceiling. In addition a water sensor includes an enclosed housing having a bottom or base and four electrical contacts extending through the base and positioned above the floor by about 2 mm by four rubber spacers or feet. In addition a first circuit connects a first and a second contact separated from one another by an airspace to a pair of banana clips for turning the HIVAR system off when water between the first and second contacts is completed due to the presence of water. A second circuit includes a switch and a 60K OHM resistor connecting that circuit to a first of the contacts and second of the contacts when the switch is in a closed position.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: October 28, 2014
    Inventor: Khaled Ali Al-Harbi
  • Patent number: 8689994
    Abstract: A safety device for a fluid storage tank having a first port for filling the tank with fuel oil and a second port for allowing airflow therethrough is disclosed. The safety device includes a tubular body having a first open end and a second open end connectable to the second port, and a flow check valve contained within the tubular body and configured to remain open when air flows through the safety device and configured to close based on a predetermined fluid force of the fuel oil through the safety device. Related systems and methods are also disclosed.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 8, 2014
    Inventor: Milton Pashcow
  • Patent number: 8272264
    Abstract: A type of liquid level gauge for continuous measurement of boiler steam drum under full conditions and its method for calculation of liquid level, this liquid level gauge includes one metal measurement tube and one transmitter. The steam-side pipe connected to steam drum is fitted on the upper part of the metal measurement tube and the water-side pipe connected to steam drum is fitted on the lower part of the metal measurement tube, one insulated jacket pipe is available inside the metal measurement tube and 1# probe, 2# probe, and 3# probe are mounted from down upwards inside the insulated jacket pope. The respective probes are mutually insulated and not conducted. The three probes are respectively connected with the transmitter through lead wires of the probes.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: September 25, 2012
    Assignee: Beijing Capstar Automation Instrument Co., Ltd.
    Inventor: Ming Luo
  • Patent number: 8159358
    Abstract: A method includes receiving information associated with a level of material in a tank, where the tank has a hatch. The method also includes determining whether the level of material in the tank experiences a specified variation within a critical zone associated with the hatch. The specified variation is indicative of the hatch being open while the tank is being filled. In addition, the method includes generating an alarm when the level of material in the tank experiences the specified variation. Determining whether the level of material in the tank experiences the specified variation could be based on an entrance level speed of the material, which identifies a rate at which the level of material in the tank is increasing when the material level crosses a lower bound of the critical zone. Also, no alarms could be generated when the level of material in the tank is outside the critical zone.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: April 17, 2012
    Assignee: Enraf B.V.
    Inventors: Adrianus Leonardus David van Schie, Jan Leendert Stolk
  • Patent number: 8127604
    Abstract: The liquid level sensing device includes rotating electrically conductive probes and uses a self-cleaning rotary electrical connection system with a contact stylus on a rotating conductive barrel, for sensing a liquid level in a dispensing container of an aircraft galley insert. The probes, pivot arms of the probes, rotating drum and stylus may have an exterior surface formed of an electrically conductive, corrosion resistant material.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: March 6, 2012
    Assignee: B/E Intellectual Property, Inc.
    Inventors: Gary R. Hannah, Nathaniel F. Yoder, Jeff Renz, David Weiss
  • Patent number: 7735486
    Abstract: A medical respiratory apparatus includes a chamber (10) which is at least in part at least translucent. The chamber (10) includes a float member (12) formed of an inert material and contains, in use, a fluid intended for inhalation. The float member (12) is adapted to float upon the fluid intended to be contained within the chamber (10) and has a peripheral dimension adjacent, but less than, the internal peripheral dimension of the chamber (10). At least the outer peripheral surface of the float member (12) has a coloration distinct from that of the fluid to be contained within the chamber such that the level of the fluid within the chamber (10) can be readily observed.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: June 15, 2010
    Assignee: Intersurgical AG
    Inventor: Simon Robert Payne
  • Patent number: 7695334
    Abstract: A visual locating device comprises an elongate, inherently buoyant, flexible sheet for floating on the surface of a body of water that has a longitudinal axis. At least three buoyant support struts are secured to the sheet and disposed across the longitudinal axis of the sheet such that the sheet is divided into a plurality of sections defined between respective pairs of struts. A light source is disposed on the sheet to provide nighttime visibility to the sheet. A pouch, which receives the sheet when stowed, is configured to release the sheet when immersed in water. The sheet is at least z-folded inside the pouch.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: April 13, 2010
    Inventors: Robert N. Yonover, Kevin Dean Schnitzer, Richard James Elder
  • Publication number: 20090277374
    Abstract: A method includes receiving information associated with a level of material in a tank, where the tank has a hatch. The method also includes determining whether the level of material in the tank experiences a specified variation within a critical zone associated with the hatch. The specified variation is indicative of the hatch being open while the tank is being filled. In addition, the method includes generating an alarm when the level of material in the tank experiences the specified variation. Determining whether the level of material in the tank experiences the specified variation could be based on an entrance level speed of the material, which identifies a rate at which the level of material in the tank is increasing when the material level crosses a lower bound of the critical zone. Also, no alarms could be generated when the level of material in the tank is outside the critical zone.
    Type: Application
    Filed: May 12, 2008
    Publication date: November 12, 2009
    Applicant: Honeywell International Inc.
    Inventors: Adrianus Leonardus David van Schie, Jan Leendert Stolk
  • Publication number: 20090058666
    Abstract: A device and system for monitoring a fluid level within a tank and for indicating when the fluid level within the tank has dropped below a predetermined minimum level. The device includes a strobe light, which is switched on when a sensor determines that the fluid level within the tank has dropped below a predetermined level. The flashing strobe light can be viewed during the day and at night from any viewing angle, and can thereby alert an observer that the tank needs to be filled before the tank becomes empty.
    Type: Application
    Filed: September 4, 2008
    Publication date: March 5, 2009
    Inventor: Chris Clabaugh
  • Patent number: 7497185
    Abstract: An audible fill level alarm is provided. The alarm includes a whistle body having a lower whistle hole, a whistle-tube depending from said whistle body, and a whistle disk having an upper whistle hole. The whistle disk and the whistle body define a whistle chamber that is conical in shape.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: March 3, 2009
    Assignee: Oil Equipment Manufacturing, LLC
    Inventors: Einar P. Gudjohnsen, Peter J. Shukis
  • Publication number: 20080271527
    Abstract: A liquid level sensor system actuated by a column pressure includes a hollow member having a distal open end adapted to be positioned into a liquid reservoir to a depth below a liquid surface level, and a sensor head unit. The sensor head unit is responsive to the column pressure to provide an indication of a liquid level in the reservoir. A low liquid level alarm circuit is responsive to the bellows member to generate a signal indicative of a low liquid level state.
    Type: Application
    Filed: June 20, 2008
    Publication date: November 6, 2008
    Inventor: John T. Hewitt
  • Patent number: 7403839
    Abstract: A moisture monitoring and control system comprising: 1) a plurality of moisture sensors; 2) one or more local or remote control stations capable of monitoring and controlling each of the individual elements of the moisture monitoring and control system; 3) at least one water control valve capable of turning off the water supply to all or at least one water supply zone and powered by an aerogel capacitor; and 4) a plurality of non-interfering RF communications devices at each of the sensor, control and water control valve locations.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: July 22, 2008
    Inventor: Joshua Kaplan
  • Publication number: 20080098950
    Abstract: An audible fill level alarm is provided. The alarm includes a whistle body having a lower whistle hole, a whistle-tube depending from said whistle body, and a whistle disk having an upper whistle hole. The whistle disk and the whistle body define a whistle chamber that is conical in shape.
    Type: Application
    Filed: October 25, 2006
    Publication date: May 1, 2008
    Inventors: Einar P. Gudjohnsen, Peter J. Shukis
  • Patent number: 7364610
    Abstract: The present invention is directed towards a sensor including, inter alia, a body having first and second spaced-apart apertures, the first aperture having a shape producing an audible noise upon a fluid passing therethrough; a piston positioned within the body; and a chamber having an additional fluid disposed therein, with a volume of the additional fluid placing the piston between first and second positions, the first position impeding the first volume of fluid and the second position allowing the first volume of fluid to pass through the first aperture.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: April 29, 2008
    Inventor: Michael D. Falcon
  • Publication number: 20070260209
    Abstract: Assembly of a diaper and a sensor for at least determining a position of a user of the diaper, wherein the diaper is provided with an insertion opening or coupling element for coupling of the sensor to the diaper, such as Velcro. Method for forming a diaper, wherein from at least a top layer, a core material and a bottom layer, at least partly a diaper is formed, such that the core material is locked between the top layer and the bottom layer, wherein the top layer is at least partly moisture-transmissive and during use is turned towards the body of a user and the bottom layer is substantially moisture-tight and during use is turned outwards, after which on the side of the diaper turned outwards during use an insertion opening or coupling element is provided.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 8, 2007
    Applicant: Dansamar B.V.
    Inventor: Arend Jan Brilman
  • Patent number: 7129832
    Abstract: A high/low level alarm controller having ability to interface with level sensing equipment and instrumentation in a manner that isolates the controller from downstream components is presented. The controller accepts power, logic and transduced level inputs; output from the controller is available to drive relays, solenoid valves, motors, pumps, alarm horns, etc. The high/low level alarm controller is ideal for existing/retrofit applications and new installations alike.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: October 31, 2006
    Inventor: Daniel Sabatino
  • Patent number: 7079037
    Abstract: 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 either the low liquid level or satisfactory liquid level conditions, and electrical circuitry operable to illuminate one of the indicator lights upon detection of the ambient dark condition by the photodetector and detection of either the low liquid level condition or satisfactory liquid level condition by the sensor.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: July 18, 2006
    Inventors: Herbert G. Ross, Jr., Bud Wilcox
  • Patent number: 7044077
    Abstract: The mechanical signaling device is used for indicating when contaminates are present in water in a manhole so that the contaminated can be cleaned out of the manhole before the contaminates are released into the environment. The mechanical signaling device has a flag which moves up to a visible warning position when triggered by contaminates entering a float in the manhole which will then weigh the float down which pulls on a cable attached to a trigger which releases a spring loaded flag to pop up into view. The flag is easily reset by pushing it back down against the force of the spring until it is reset for release by the triggering mechanism. The mechanical signaling mechanism is housed in a pipe and has a protective cover preventing snow from resting on the top cover, further a top cover seals pipe when the flag is down.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: May 16, 2006
    Assignee: Royal Environmental Systems, Inc.
    Inventor: Bradley C. Currie
  • Patent number: 6970079
    Abstract: A high/low level alarm controller having ability to interface with level sensing equipment and instrumentation in a manner that isolates the controller from downstream components is presented. The controller accepts power, logic and transduced level inputs; output from the controller is available to drive relays, solenoid valves, motors, pumps, alarm horns, etc. The high/low level alarm controller is ideal for existing/retrofit applications and new installations alike.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: November 29, 2005
    Inventor: Daniel Sabatino
  • Patent number: 6805070
    Abstract: A fluid storage container provides a visual display of a fluid level therein. The container has a plurality of capillary tubes attached thereto, correlating to predetermined fluid levels within the container, and which may be visually observed upon inspection of the capillary tubes. Each of the capillary tubes has an inlet at a lower end thereof, and the inlets are located at different vertical levels from one another. When fluid in the container is at a level above an inlet of a given capillary tube, the capillary tube automatically fills with fluid, providing a visual signal of the fluid level.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: October 19, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Lin Lee, Yan Beaudoin, Steven Thiele, Michael Binfet
  • Patent number: 6725800
    Abstract: An accumulating whistling vent for indicating a level of liquid in a tank having a vent line is disclosed. The whistling vent includes a whistle housing reservoir which has mounting tubes extending from either ends. A whisle is housed in the whistle housing reservoir by insertion into one of the mounting tubes. The whistling vent is coupled between the vent line of the tank such that the tube containing the whistle is closest to the tank. As liquid is introduced into the tank an audible signal is produced by the whistle. Once full, air flowing from the tank through the vent line is replaced by the incoming liquid, thus muting the whistle. Excess liquid is accumulated in the reservoir prior to discharge from the vent line, thereby providing additional time to respond to the change in audible signal. In a preferred embodiment of the invention, a transparent reservoir is used to provide a visual indicator in addition to the change in audible signal.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: April 27, 2004
    Assignee: Enviro Technology Products, Ltd.
    Inventor: Murray Hawkins
  • Publication number: 20040069205
    Abstract: A fluid storage container provides a visual display of a fluid level therein. The container has a plurality of capillary tubes attached thereto, correlating to predetermined fluid levels within the container, and which may be visually observed upon inspection of the capillary tubes. Each of the capillary tubes has an inlet at a lower end thereof, and the inlets are located at different vertical levels from one another. When fluid in the container is at a level above an inlet of a given capillary tube, the capillary tube automatically fills with fluid, providing a visual signal of the fluid level.
    Type: Application
    Filed: October 9, 2002
    Publication date: April 15, 2004
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Lin L. Lee, Yan Beaudoin, Steven R. Thiele, Michael Binfet
  • Patent number: 6688329
    Abstract: A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff sensor. The feed timer supplies water to the boiler only if the low water cutoff sensor continues to indicate a low water level for a delay period of time measured by a delay timer. A resettable display indicates the quantity of water supplied by the water feeder to the boiler based on a feed counter incremented during water feeding. A manual feed button allows water to be manually fed to the boiler. The quantity of water manually supplied to the boiler is also shown on the display. The feed timer and delay timer are preferably implemented in software in a microcontroller in the water feeder controller. A lockout loop in the software prevents overfeeding of water to the boiler in the event of a failure of the low water cutoff sensor.
    Type: Grant
    Filed: July 6, 2001
    Date of Patent: February 10, 2004
    Assignee: C. Cowles & Company
    Inventors: Christopher L. Murray, Richard A. Lyons
  • Patent number: 6672244
    Abstract: A fuel level indicator system includes a housing member that is couplable to a fuel tank. The housing member is positionable adjacent to a vent opening in the fuel tank. The housing member defines an interior space. The housing member has a lower aperture facilitating environmental communication between the interior space and an interior of the fuel tank. The housing member has an upper aperture. A vent portion is coupled to the housing. The vent portion is in environmental communication with the interior space of the housing member via the upper aperture. The vent portion facilitates air flow from the interior of the fuel tank through the housing and out of the system. A whistle assembly is positioned substantially within the housing. The whistle assembly produces an aural indication of airflow through the housing member.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: January 6, 2004
    Inventor: Michael J. Martin
  • Publication number: 20030140841
    Abstract: An accumulating whistling vent for indicating a level of liquid in a tank having a vent line is disclosed. The whistling vent includes a whistle housing reservoir which has mounting tubes extending from either ends. A whisle is housed in the whistle housing reservoir by insertion into one of the mounting tubes. The whistling vent is coupled between the vent line of the tank such that the tube containing the whistle is closest to the tank. As liquid is introduced into the tank an audible signal is produced by the whistle. Once full, air flowing from the tank through the vent line is replaced by the incoming liquid, thus muting the whistle. Excess liquid is accumulated in the reservoir prior to discharge from the vent line, thereby providing additional time to respond to the change in audible signal. In a preferred embodiment of the invention, a transparent reservoir is used to provide a visual indicator in addition to the change in audible signal.
    Type: Application
    Filed: February 27, 2003
    Publication date: July 31, 2003
    Inventor: Murray Hawkins
  • Patent number: 6551558
    Abstract: The invention concerns a liquid transfer device for an analysis apparatus with a liquid transfer cannula (5) and a capacitive liquid level detector to detect the immersion of the liquid transfer cannula (5) in an analysis liquid contained in a vessel. To reliably check if the liquid transfer cannula (5) is submerged in the analysis liquid or immersed for example in foam it is proposed additionally that resistance is measured by a measurement section (16) in the liquid transfer cannula (5).
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: April 22, 2003
    Assignee: Roche Diagnostics GmbH
    Inventors: Karl-Heinz Mann, Stephan Sattler
  • Patent number: 6488826
    Abstract: An electrode electrolyte system is provided that is capable of operating in slope sensors in a wide range of temperatures. The eletrolytic system is characterized by a stable conductivity at high temperature and by low toxicity. The slope sensor can be installed in a system containing an Nal solution in propylene carbonate, combined with platinum electrodes.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: December 3, 2002
    Inventors: Patrick Altmeier, Andreas Konrad
  • Patent number: 6236323
    Abstract: A fluid level indicator (22) indicating the level of a fluid (14) in a chamber (12) having a piston (16) is disclosed. The fluid level indicator (12) has a housing (24) that is positioned adjacent to the chamber (12). A plurality of magnetic pins (28, 38) are moveably disposed within the housing (24). The magnetic pins (28, 38) have a first position and a second position. At least one of the magnetic pins (38) shifts from the first position to the second position when the piston (16) is aligned therewith, thereby indicating the position of the piston (16) within the chamber (12) and indicating the level of fluid (14) within the chamber (12).
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: May 22, 2001
    Assignee: Bell Helicopter TEXTRON Inc.
    Inventors: Carlos Alexander Fenny, Darrel Bill Bryan
  • Patent number: 6217752
    Abstract: A two stage alarm system for detecting rising levels of sludge in septic tanks, and similar sedimentary tanks. The system, to detect a first or “caution” level, and a second or “critical” level of sludge, relies upon a pair of vertically positioned weight sensitive switching mechanisms which, when triggered by the rising levels of sludge, will send appropriate signals to a remote alarm mechanism, such as at the residence, to activate a “yellow” and/or “red” light, for example, thus alerting the owner of the tank to the need for remedial action.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: April 17, 2001
    Inventor: Terry L. Coots
  • Patent number: 6000359
    Abstract: A housing and float assembly allow for vapors or gases displaced during filling storage vessels to be redirected from a normal vent through a vapor or gas activated whistle or alarm without significantly restricting the venting rate of the vessel. The alarm produces a warning for the operator that the storage vessel has reached the predetermined high level to help avoid overfilling of the storage vessel. The device can be fabricated from readily available "off the shelf" parts and mounts into standard pipe threads or on to standard pipe flanges. The device can be provided as a kit to be assembled by the user.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: December 14, 1999
    Inventors: James Lee Hudson, Jr., Billy Tindol Hudson
  • Patent number: 5832968
    Abstract: A fuel overfill warning device including a vent tube. A whistle alarm is positioned within the vent tube. A pair of flexible hoses engage opposing end portions of the vent tube. The whistle alarm will emit an audible signal as air is forced out of the vent line of the fuel tank while pumping fuel. As the tank approaches a full level, the audible signal will gradually decrease and then cease.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: November 10, 1998
    Inventor: Judith Anne Leary
  • Patent number: 5555905
    Abstract: A cassette type gas cylinder, containing liquefied fuel gas, for giving an alarm when the volume of remaining fuel is reduced to a predetermined level or less in order to provide an advanced notice of replacement of the gas cylinder with a simple structure using burst energy of discharged gas. A valve 12 for opening and closing the discharge of liquefied gas is arranged at the center on one end of a container body 11a. A gas flow channel 17, with one end thereof opened into a gas space formed above the level of the fuel when the gas cylinder is laid horizontally, is connected to the valve 12. A vibrating member 27, for producing a sound when vibrated and caused to collide with a body by the burst of the fuel gas, is disposed in the gas flow channel 17. This vibrating member 27 is connected to a damping member 38 by means of a coupling member 29. The damping member 38 is located below a predetermined level of the liquefied fuel gas, and is subjected to resistance while moving in the liquefied fuel gas.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: September 17, 1996
    Assignee: Tokai Corporation
    Inventors: Hideo Mifune, Yasuaki Nakamura
  • Patent number: 5553780
    Abstract: A spraying system for providing a pressurized liquid spray for cleaning purposes is mounted on a vehicle for use outdoors. The system includes a liquid storage tank, a spray device for directing a spray of liquid therefrom, and a liquid supply system for pumping liquid from the liquid storage tank and for providing such liquid under pressure to the spray device. A standpipe is located within the liquid storage tank, connected to the tank liquid outlet, having a liquid inlet spaced above the level of the tank liquid outlet by a short distance. As the liquid is drawn from the tank and eventually reaches the level of the standpipe liquid inlet, air will be entrained with the liquid as the liquid then continues to enter the standpipe, causing the spray to sputter or spit as it exits the spray device. This alerts the operator to a low level of liquid in the tank and comprises a warning that use of the spraying system should be discontinued until the liquid storage tank is refilled with liquid.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: September 10, 1996
    Assignee: The Toro Company
    Inventor: Harlan T. Gjerde
  • Patent number: 5293896
    Abstract: A semiconductor sensor detects the existence of liquified gases by immersion or approaching the liquid. A high signal amplitude of the sensor permits a simple signal evaluation of high reliability. The sensor permits the realization of filling level measuring devices or level control devices for liquified gases.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: March 15, 1994
    Assignee: Balzers Aktiengesellschaft
    Inventors: Luder Gleichmann, Gerd Lobel
  • Patent number: 5289846
    Abstract: An automatic water replenishing system is designed for use with multiple dye vats used for tinting eyeglass lenses, but the broad principles of the invention could apply to other systems used for replenishing individual ones of plural vats or reservoirs with water or some other liquid. A rotary water distributor rotates about an arc when it is signaled by water level sensors that the water in a particular vat is low. As the rotary distributor reaches the low reservoir, the LED carried by the distributor actuates a photo transistor adjacent the particular reservoir that needs replenishing, causing the motor to stop and the water supply solenoid valve to be actuated, filling the reservoir until a brief period of time after the level sensor indicates a full condition to the central control system.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: March 1, 1994
    Inventors: Tariq J. Elias, Hani E. Chika
  • Patent number: 5275216
    Abstract: An add-on liquid overflow shut-off valve for a tank. The device is used to ensure that a holding tank is not overfilled and provides a fail safe way to prevent spillage when pumping into a holding tank. The device provides a warning indicator when the holding tank is near full. The device also has a fail safe switch which will turn off air to a pump when the holding tank is full and also blow a whistle to indicate the tank is full. The device uses a diaphragm which operates on a pressure differential. When the pressure is increase past a spring set point, the diaphragm raises a plate that activates a switching valve which shuts off air supply to an air pump and blows a whistle.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: January 4, 1994
    Inventor: Christopher R. Haedt
  • Patent number: 5112319
    Abstract: An infusion alarm system comprised of a housing, an upper cover attached to the housing at the top, a control circuit set in said upper cover, a battery box set inside the housing and an inner shell set between the housing and the battery box, a tension spring set in the inner shell having a hook coupled thereto at the bottom for suspending a drip infusion bottle, an adjusting key set set in the housing to adjust the tension of the tension spring. When the weight of the drip infusion bottle is reduced to a predetermined range due to reducing of infusion solution during drip infusion operation, the control circuit is triggered to produce audio and visual alarm signals through an audio and a visual alarm device respectively.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: May 12, 1992
    Inventor: Eric Lai
  • Patent number: 5023608
    Abstract: A fuel filler alarm for boats includes a housing, a whistle element on the housing and a suction ring on the housing. The suction ring is operable for detachably securing the housing to the hull of a boat adjacent a fuel tank vent thereon so that air passing outwardly through the vent passes through the housing and the whistle element. The whistle element is responsive to the outward flow of air through the fuel tank vent during a fuel filling operation for producing an audible whistling sound, while sound essentially stops when the associated fuel tank reaches a substantially full condition.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: June 11, 1991
    Assignee: Robert L. Delisle, Jr.
    Inventors: Robert L. Delisle, Jr., Douglas J. Goss
  • Patent number: 4997013
    Abstract: An apparatus and a method for filling vessels with liquid has a non-electric fill indicator having an air passageway leading up and out of the vessel to an air flow indicator, air escaping during filling causes the indicator to whistle and when the whistle stops, the vessel is filled and the user stops filing; a funnel has an elongate air inlet port through a side wall to an adjustable height air inlet to the indicator, air flow is not stopped until the height level of opened air inlet port is covered by the vessel liquid.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: March 5, 1991
    Inventor: Arganius E. Peckels
  • Patent number: 4982655
    Abstract: A saucepan capable of setting amount of soup finally left therein, including a body having a nozzle portion communicated with inner portion thereof, and a cap provided with pressure-relieving hole and pressure valve, wherein a conduit provided with scale is extended into the nozzle portion and the position of lower opening of the conduit will determine the final level of the cooked soup, a thermal sensor being disposed at upper end of the conduit whereby when the cooked soup goes down below the lower opening of the conduit, because the pressure limit of the pressure valve is larger than the pressure existing in the conduit, the created steam will immediately alteratively escape through the conduit and the thermal sensor will sense the temperature of the escaping steam and indicate the controller to cut off power and emit warning sound so as to effectively control final amount of the soup left in the saucepan.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: January 8, 1991
    Inventors: Juang Wen-Der, Yeh Wann-Fwu
  • Patent number: 4977850
    Abstract: A signal apparatus comprising a post-mountable arm adapted at one end to be mounted on a vertical stand post and having provided at the other end thereof a bell adapted to be struck by a counter-weight mounted on one end of a balance beam when blood reaches a predetermined level in a blood collection bag hung from the other end of the balance beam which is mounted on the said post below the said arm, and a hook adapted to receive a second bag removably hung thereon.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: December 18, 1990
    Inventor: Morris T. King
  • Patent number: 4976297
    Abstract: An apparatus and a method for filling vessels with liquid has a non-electric fill indicator having an air passageway leading up and out of the vessel to an air flow indicator, air escaping during filling causes the indicator to whistle and when the whistle stops, the vessel is filled and the user stops filling. The air flow is not stopped until the height level of opened air inlet port is covered by the vessel liquid. The funnel has a full height slot along one side and a vertically slidable air tube in the slot; air is admitted transversely into an aperture through the tube with the aperture being vertically movable along with the tube for easy adjustment of relative fill level.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: December 11, 1990
    Inventor: Arganius E. Peckels
  • Patent number: 4856564
    Abstract: An indicator assembly generates a sound when a liquid is flowing through a fill conduit for a storage tank. The assembly has a body with a first connection device for connection with the fill conduit, and has a second connection device for connection to the storage tank. There is a passageway for liquid which extends between the first and second connection devices. An aspirator has an outer opening outside the body which communicates with an inner opening positioned to contact liquid flowing through the passageway from the fill conduit. A sound generator generates a sound with a flow of air therethrough. The sound generator is connected to the outer end of the aspirator so that, when liquid flows through the passageway for liquid, air is drawn through the aspirator from the storage tank, and the sound generator generates sounds.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: August 15, 1989
    Inventor: Michael S. Obal
  • Patent number: 4827246
    Abstract: Combination hydrocarbon and water level sensor systems for use in connection with underground storage sites, such as gasoline storage tanks, industrial waste sites, and the like, with a solar cell power source and an LCD display located above ground and providing directly viewable indication of the presence or absence in the underground environment of "HYDROCARBON" and/or "WATER", with the absence of such being indicated by "OK". In the preferred form, a pod containing an adsorptive type hydrocarbon gas sensor and a galvanic cell type liquid water sensor is suspended by electrical cable means from a well cap in which the solar cell and LCD display are installed.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: May 2, 1989
    Inventors: James P. Dolan, Patrick M. Dolan