Leakage Patents (Class 340/605)
  • Patent number: 7044154
    Abstract: The invention is a detection and prevention system to detect and prevent fluid leaks in a property that may cause damage to the property. The sources of the leaks may include, for example, toilets, hot water heater, sinks, washing machines, water makers and broken pipes or other sources of fluid leaks. The inventive may include one or more sender units that may be positioned at various locations on a property. The sender units may have a fluid sensor (for detecting a fluid leak) and a transmitter (for communicating with a base unit). The base unit may receive signals from the transmitter when the fluid sensors detect a fluid. The base unit may then communicate with a main shut off valve to restrict the flow of fluids onto the property.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: May 16, 2006
    Assignee: Process Integration
    Inventors: Robert D. Henderson, Xan D. Henderson, Donald E. Adams, Steven A. Bozsi
  • Patent number: 7040142
    Abstract: One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Extracorporeal blood treatment systems draw blood at such a high rate that a loss of integrity in the blood circuit can be catastrophic. There are a number of mechanisms for detecting and preventing leaks and/or air infiltration, but none is perfect. According to the present invention, multiple inputs are combined to provide greater security against leakage and/or air infiltration by providing sensors for external presence of liquid (plasma, replacement fluid, blood, etc.) outside a fluid circuit and infiltration of air or bubbles into the fluid circuit.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: May 9, 2006
    Assignee: Nxstage Medical, Inc.
    Inventor: Jeffrey H. Burbank
  • Patent number: 7042362
    Abstract: A method and an apparatus thereof for monitoring leakage of process cooling water (PCW) in a furnace. In the method, a bellows used to deliver the process cooling water is covered by a protecting tubing, so as to protect the bellows from being corroded by the process environment and to control the flow direction of the cooling water leaking from the bellows, thus avoiding the cooling water sprinkling. In addition, a tray is installed under the bellows to receive the leaking cooling water, so as to prevent the leaking cooling water from spilling on wafers. Besides, sensors are installed in the tray to send a signal while the cooling water falling on the tray.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: May 9, 2006
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Jiun-Rong Pai, Yung-Hsin Lo, Hong-Chih Wu
  • Patent number: 7032435
    Abstract: A flapper is provided in the main conductive fluid supply inlet line, and a permanent magnet is affixed to the bottom of the flapper. Adjacent to the flapper, outside the pipe, a magnetically operated switch is placed. Conductive fluid sensors are placed in or on conductive fluid dependent appliances, to determine the presence or absence of flowing conductive fluids. The flapper's switch and the conductive fluid sensors are connected in circuit with a relay, which in turn controls an electrically actuated valve cutting off or permitting the entry of fluids from the source to the inlet pipe. If the switch is activated, and one or more of the fluid sensors is not, within a predetermined time period, then the electrically actuated valve will cut off the entry of fluids from the source to the inlet pipe. If the switch and sensors are activated concurrently, normal fluid flow will be permitted.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: April 25, 2006
    Inventor: Brian Edward Hassenflug
  • Patent number: 7030767
    Abstract: A liquid flow mitigation system comprising a systems interface, a liquid arresting mechanism operable to impede flow of a liquid, a control device operable to produce an input to the systems interface representing a request to impede flow of the liquid, and a liquid utilizing device operable to produce an input to the systems interface representing a request for liquid flow. The systems interface directs the liquid arresting mechanism to impede liquid flow when the systems interface is in receipt of an input from the control device. The systems interface directs the liquid arresting mechanism to permit liquid flow when the systems interface is in receipt of an input from the water utilizing device.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: April 18, 2006
    Assignee: Flo-Guard Water Leak Mitigation Systems, L.L.C.
    Inventor: Paul Joseph Candela
  • Patent number: 7015810
    Abstract: A control system (2) used for reaction equipment (20) and a monitoring device thereof are disclosed. The control system is connected to a computer (3) by signal, and includes the monitoring device and a portable alarm (24). The monitoring device includes a detector (21) for detecting the reaction action proceeded in the reaction equipment and outputting a detected value, an abnormal state assertor (22) in communication with the detector for giving an abnormal signal when the detected value is in the range of an abnormal state, and a wireless signal emitter (23) in communication with the abnormal state assertor for transmitting a wireless signal when receiving the abnormal signal. The wireless signal is received by the portable alarm and the portable alarm gives a warning signal to inform the user carrying with it.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: March 21, 2006
    Assignee: Exon Science Incorporation
    Inventor: Wen-Wei Su
  • Patent number: 6987458
    Abstract: A leak-stopper system for water plumbing (2) has a leak-probe circuit (1) positioned in water-detection proximity to water plumbing for a building. Leak sensors (3) which include three-probe sensors (14) are spaced apart on the leak-probe circuit for conveying existence of leakage water (7) electrically to a control board (4) with electrical communication to visual signalers (5) and to a plumbing valve (6) for shutting off water to the water plumbing automatically before leakage in the water plumbing can be fixed and to indicate where one or more leaks are for being fixed to prevent water damage to a building or its contents. Preferably, electrical current to the leak-probe circuit and to the plumbing valve is from a power source that includes an isolated power source which can be a chargeable battery (9) or other DC power supplier (12) for supplying a safe level of current for a predetermined period of leak-detection time in case of power outage to the building.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: January 17, 2006
    Inventor: Garrett L. Limmer
  • Patent number: 6985083
    Abstract: A method is provided for marking electrical wiring with condition indicators. One or more markers are added to one or both of the insulative material and a surface of an electrical conductor such that it bonds thereto. Each marker is capable of emanating into a surrounding atmospheric environment as a gaseous effluent in response to a specific condition experienced by the electrical conductor.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: January 10, 2006
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: William T. Yost, Daniel F. Perey, K. Elliott Cramer
  • Patent number: 6978659
    Abstract: A leak sensor apparatus (10) and flow control equipment (16) for sensing a leak from a machine using a supply of water (or other fluid) or from connecting hoses supplying the water, and for turning off the supply when a leak is detected, with the leak sensor (10) itself including in particular two conductors (10a–b) held in spaced apart relation in a fluid-permeable insulating material (10c), and the flow control equipment (16) for providing a voltage difference between the two conductors (10a–b) and for sensing the presence of a fluid based on the fluid providing an electrical path between the two conductors (10a–b) and so allowing current to flow between the two conductors (10a–b) under the urging of the voltage difference provided by the flow control equipment (16). In some embodiments, the two conductors (10a–b) are configured so as to wrap about one or more of the connecting hoses.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: December 27, 2005
    Assignee: ITT Manufacturing Enterprises
    Inventors: David L. Phillips, Jeffrey A. Cain, James C. Walls
  • Patent number: 6978661
    Abstract: A vacuum generator that is coupled to a double-walled fuel supply piping internal to a fuel dispenser that carries the fuel from the underground storage tank to the hose and nozzle of the fuel dispenser. The double-walled fuel supply piping contains an inner piping that carries the fuel. An interstitial space is formed by the space between the inner piping and an outer piping that surrounds the inner piping to capture any leaked fuel from the inner piping. The interstitial space is coupled to a vacuum created by the vacuum generator to determine if a leak exists in the interstitial space. The vacuum generator may be a standalone unit or may be a submersible turbine pump that also pumps fuel from the underground storage tank to the fuel dispenser.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: December 27, 2005
    Assignee: Gilbarco Inc.
    Inventors: Ray J. Hutchinson, Donald D. Halla, Richard G. Dolson, Robert P. Hart, Richard K. Lucas, Kent D. Reid
  • Patent number: 6977590
    Abstract: A system is disclosed comprising a flexible tube attached to a reservoir containing a hazardous material neutralizing substance, and possibly pressurized with air or another gas. The tube is routed around the perimeter of a region where one or more hazardous material containers are stored. In the event of a leak that spreads to the perimeter of the tube, the tube material type is so selected to degrade structurally in response to contact with the hazardous material, thereby rupturing and releasing the neutralizing substance stored within the tube and attached reservoir. The neutralizing material used is selected to neutralize the hazardous material released, to mitigate further damage or eliminate the hazard completely, or at least until intervening personnel can arrive.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: December 20, 2005
    Inventor: Joseph Michael Bennett
  • Patent number: 6957157
    Abstract: Tracking vibrations on a pipeline network includes installing multiple vibration recorders on the pipeline network, with each recorder including a sensor, a timer, a processor, and a digital communication device. At each vibration recorder, vibration signals are received from the sensor at programmed times under the control of the processor of the vibration recorders and processed by the processor. The processed vibration signals are communicated from the vibration recorder to a reader device using the digital communication device. Thereafter, the processed vibration signals from the one or more reader devices are collected at a central computer system. Finally, the collected processed vibrations signals are analyzed at the central computer system to determine abnormal vibration patterns and to obtain measures of any leaks present in the pipeline network.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: October 18, 2005
    Assignee: Flow Metrix, Inc.
    Inventor: Paul Lander
  • Patent number: 6939470
    Abstract: A water treatment system including an automatic shut-off control valve. The system preferably includes inflow and outflow sensors that monitor flow through the system and a pressure sensor that senses back pressure in a downstream plumbing system. If the sensors sense different flows, a leak in the system is assumed and the control valve is closed. In one embodiment, the flowing back pressure is monitored by the pressure sensor to detect leaks in the plumbing system. In another embodiment, the valve is closed after a specific volume of water flow is sensed and the pressure sensor measures static back pressure in the plumbing system to detect a leak. In yet another embodiment, incremental amounts of water are released by the valve and subsequent back pressures are tested to detect a leak. Optionally, the system includes a control to shut-off a water supply when a water treatment device enclosure is accessed.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: September 6, 2005
    Assignee: Access Business Group International LLC
    Inventors: David W. Baarman, Eric K. Bartkus
  • Patent number: 6935170
    Abstract: A tire inspection apparatus for detecting defects in tubeless truck tires. The apparatus includes a support base having first, second and third supports, the first and third supports being pivotable between a first position and a second position. A wheel assembly is rotatably supported on each of the first and third supports of the support base with each wheel assembly having an upper portion and a removably interconnected, axially aligned second portion. A connector arrangement is provided on each wheel assembly for removably interconnecting together the first and second portions of the assembly and a lifting apparatus is mounted on the second support of the support base for lifting the first portion of the wheel assembly and for moving the first portion of the wheel assembly into and out of alignment with the second portion of the wheel assembly.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: August 30, 2005
    Inventors: Bruce L Saunders, Jerry M. Hignight
  • Patent number: 6935160
    Abstract: The present invention discloses water leakage detecting system for liquid pipe and method thereof. The present invention provides the present status for all liquid pipes by installing more than one liquid pipes, by laying under the ground, to which more than one conducting wires are inserted or fixed, transmitting pulse signal to each conducting wire using pulse transmitter, checking whether each liquid pipe is damaged or not and grasp the damaged points by inspecting the received signal.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: August 30, 2005
    Assignee: Wacon Co., Ltd.
    Inventors: In Sik Hong, Seung Soo Ha
  • Patent number: 6914530
    Abstract: A method for detecting the ingress of liquid into an empty elongate hollow structure such as a support for an offshore platform which is at least in part submerged in a liquid. Sound is introduced into the structure by a sound generating device mounted within the hollow structure, the device comprising sound generating means and liquid detection means. When the liquid detection means detect an ingress of liquid into the structure, the sound generating means generate a sound in response to this detection. The generated sound propagates through the structure and sound is detected, and detection of the sound giving an indication of liquid ingress into the structure.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: July 5, 2005
    Inventor: Ronald Frederick Geary
  • Patent number: 6892751
    Abstract: A building protection system includes a switch, a transmitter, a receiver and a controllable shut-off valve disposed within the inlet line of a utility, such as water or gas, provided to a building. The switch is used to close or open the shut-off valve to stop the flow of the utility into the building. The receiver is proximate the valve, while the transmitter and switch are remote from the valve. In one embodiment, the switch is a manual switch that can be used to generate a valve open or a valve closed signal. The switch and transmitter can be wall-mounted, such as in a garage, or can be integrated into a hand-held device, such as a remote control. In other embodiments, the switch is associated with a condition sensor, such as for sensing a utilities leak or for sensing a temperature outside a certain pre-determined limit value.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: May 17, 2005
    Inventor: Mark Sanders
  • Patent number: 6877359
    Abstract: Liquid leaks from a vessel cause shorts between at least one elongate sensing wire and another conductor when the fluid absorbs into the porous sheath of the sensing wire. The other conductor may comprise a second elongate sensing wire having similar porous sheath or a conductive tray or other conductive collection means. The sensing wire is placed in proximity to the vessel, such as beneath or immediately adjacent. Shorts are detected from the electrical characteristics of a circuit including the sensing wire and location is determined therefrom.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: April 12, 2005
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chin-Te Huang, Hung Fa Chen
  • Patent number: 6873263
    Abstract: A battery powered water leak detector and audible alarm are held on a credit card sized plastic board that has sufficient unobstructed area for visible messages, such as advertising, to be printed of otherwise affixed thereon.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: March 29, 2005
    Inventor: Leonard M. Hohman
  • Patent number: 6865941
    Abstract: This invention relates to liquid leak detectors and detection systems. A liquid leak detector (10) includes a first electrically conducting layer (12), a second perforate, open, porous and/or permeable electrically conducting layer (13) opposed to said first layer and an intermediate perforate, open, porous and/or permeable electrically non-conducting layer (14) for electrically isolating the two conducting layers (12, 13) whilst allowing liquid, which passes through the second conductor (13), to form an electrically conducting path between the conductors (12, 13).
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: March 15, 2005
    Assignee: Before-The-Event, Ltd.
    Inventor: Dennis Charles Parkins Gibbs
  • Patent number: 6860140
    Abstract: The present invention relates to a sensor apparatus configured to detect the presence of a gas, such as a tracer gas and a leak detection apparatus configured to detect the presence of a tracer gas and indicate the location of a leak. The leak detection apparatus may further be configured to quantify the leak rate at the leak location.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: March 1, 2005
    Assignee: Cincinnati Test Systems, Inc.
    Inventors: Fred Grant McCoy, Jonathan Mark Fazekas, Ryan R. Borntrager
  • Patent number: 6860141
    Abstract: The present invention relates to a sensor apparatus configured to detect the presence of a gas, such as a tracer gas and a leak detection apparatus configured to detect the presence of a tracer gas and indicate the location of a leak. The leak detection apparatus may further be configured to quantify the leak rate at the leak location.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: March 1, 2005
    Assignee: Cincinnati Test Systems, Inc.
    Inventors: Fred Grant McCoy, Jonathan Mark Fazekas, Ryan R. Borntrager
  • Patent number: 6853305
    Abstract: A tape-drive condensation sensor includes a probe with first and second spaced-apart electrodes that define a passage for air flow within a pneumatic conduit. A voltage source is coupled between the electrodes and the voltage of the source and the spacing between the electrodes are adapted to pass a current when a drop of condensation forms between the electrodes. An alarm circuit is activated by the flow of current, the alarm being adapted to signal an event of discernible condensation.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: February 8, 2005
    Assignee: International Business Machines Corporation
    Inventors: Mariel Acosta-Geraldino, Diana Joyce Hellman, Wayne Alan McKinley
  • Patent number: 6850164
    Abstract: A system and method are provided for detecting leaks between a door and a primary seal of a vehicle. The system includes a mist generator that generates a mist and an illuminating device for illuminating any condensed mist on at least one of the primary seal or the door. The generator includes an output nozzle that is inserted at a predetermined distance from the door and the primary seal.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: February 1, 2005
    Assignee: The Boeing Company
    Inventor: Clifford C. Olmsted
  • Patent number: 6840089
    Abstract: An apparatus and a method for testing the integrity of fuel tanks for leaks are disclosed. A microprocessor controls the pressurization of the fuel tank and then selectively allows the gas within the fuel tank to decay through any leaks within the tank or through the combination of the leaks within the tank and a reference orifice. By computing and comparing the time required for the tank pressure to decay between predetermined pressure levels due to any tank leaks with a standard decay time, a determination can be made whether the leakage rate through the tank is acceptable. Greater resolution, if necessary, is provided by computing the ratio of the time required for the tank pressure to decay between predetermined pressure levels through the combination of any tank leaks and a reference orifice versus only through the tank leaks and compares same against a standard ratio to determine whether the tank leakage rate is acceptable.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: January 11, 2005
    Assignee: Hickok Incorporated
    Inventors: Michael J. Docy, George R. Hart, Robert L. Bauman
  • Patent number: 6840086
    Abstract: The present invention relates to a sensor apparatus configured to detect the presence of a gas, such as a tracer gas and a leak detection apparatus configured to detect the presence of a tracer gas and indicate the location of a leak. The leak detection apparatus may further be configured to quantify the leak rate at the leak location.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: January 11, 2005
    Assignee: Cincinnati Test Systems, Inc.
    Inventors: Fred Grant McCoy, Jonathan Mark Fazekas, Ryan R. Borntrager
  • Patent number: 6838995
    Abstract: Passive and active methods for anticipating problems with electrical wiring are provided. An insulative material in contact with an electrical conductor has at least one impurity that is impregnated in the insulative material and/or disposed thereon. An environment around the electrical conductor is monitored for the presence or the level of the impurity(ies) emanating from the insulative material in the form of a gaseous effluent. An alarm signal is generated when a predetermined level of the gaseous effluent is detected.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: January 4, 2005
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: William T. Yost, K. Elliott Cramer, Daniel F. Perey
  • Patent number: 6834534
    Abstract: A storage tank leak detection and prevention system that detects a breach or leak in the interstitial space of a double-walled fuel storage tank in a service station environment. The interstitial space is placed under a vacuum using a submersible turbine pump that is also used to pump fuel to the fuel dispensers in the service station and therefore a separate vacuum generating source is not required. A sensing unit and/or tank monitor monitors the vacuum level in the interstitial space over time. If a significant vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum level, a catastrophic leak detection alarm is generated. If a minor vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum, a precision leak detection alarm is generated. Functional tests also ensure that the leak detection system is functioning properly.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: December 28, 2004
    Assignee: Veeder-Root Company
    Inventors: Don Halla, Richard Dolson, Robert P. Hart, Richard Lucas, Ray Hutchinson, Kent Reid
  • Patent number: 6836217
    Abstract: The invention relates to a carbon dioxide fire extinguishing device comprising a capacitive measuring device (11) which is calibrated for a temperature range above and below the critical temperature of carbon dioxide and which is used to detect the amount of gas loss from a carbon dioxide pressure tank (10). The carbon dioxide fire extinguishing device comprises an outlet valve in which the capacitive measuring probe (12) is integrated in such an advantageous way that the outflow resistance of the extinguishing gas is hardly increased at all.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: December 28, 2004
    Assignee: Luxembourg Patent Company S.A.
    Inventor: Thomas Andreas
  • Patent number: 6832504
    Abstract: The liquid sensing system for an aircraft cooler includes a middle liquid level sensor for detecting a middle liquid level of a working fluid, a liquid temperature sensor, a ventilation controller for generating a flight phase signal indicative of a flight phase of the aircraft, and a recirculation unit annunciating a working fluid system leak condition based on the middle liquid level, the liquid temperature, and the flight phase. The recirculation unit only evaluates the working fluid system leak condition during a ground flight phase and a cruise flight phase. A bottom liquid level, pressure in a working fluid accumulator and discharge pressure are also determined, and a no working fluid failure condition is annunciated based on the bottom liquid level signal, the accumulator pressure signal, and the discharge pressure signal.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: December 21, 2004
    Assignee: BE Intellectual Property, Inc.
    Inventor: Timothy Birkmann
  • Patent number: 6826948
    Abstract: A leak detection apparatus includes one or more detection devices that envelope the various pipe joints of a liquid circulation cooling system. In one approach, the detection devices include a pair of conductors separated by a wicking material impregnated with a crystalline salt that provides a low resistance electrical path between the conductors in the presence of a leak. In another approach, the detection devices include a pair of dissimilar metal mesh electrodes separated by an electrolyte-impregnated wicking material to form a water-activated battery that energizes an alarm in the presence of a leak. In either case, the electrodes and wicking material may be encased with a water-activated sealing material that hardens in the presence of a leak to contain the leakage.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: December 7, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Mohinder Singh Bhatti, Ilya Reyzin, Donald John Enzinna
  • Patent number: 6823886
    Abstract: A sump for inhibiting leakage of liquid includes a double wall for at least part of the sump, and an interstitial space between the double wall. An indicator liquid is located in the space, and a sensor is in fluid communication with the space such that a change in the pressure or liquid level in the interstitial space causes the sensor to indicate leakage into or from the interstitial space. The double wall includes a base, a wall directed upwardly from the base of the sump, and the upwardly directed wall includes an angular portion being directed at an angle from the base greater than 90 degrees relative to the base. A remote location of that portion is connected with a substantially upright wall portion for the sump. An aperture for an electrical conduit is located in the angular portion.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: November 30, 2004
    Assignee: S. Bravo Systems, Inc.
    Inventors: Sergio M. Bravo, Don K. Mukai
  • Patent number: 6812848
    Abstract: A water leak mitigation device comprising a power supply, a building systems interface, a plumbing interface, and a monitoring device is provided. The monitoring device produces a primary input to the building systems interface. Upon receipt of the primary input, the building systems interface instructs the plumbing interface to restrict water flow to the associated building. Upon receipt of a secondary input produced by a building device when the building device requires water for operation, the building systems interface instructs the plumbing interface to resume the flow of water to the building so as to permit the operation of the building device. After the building device has completed its operation, transmission of the secondary input ceases and the building systems interface instructs the plumbing interface to again restrict the flow of water to the building.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: November 2, 2004
    Assignee: Flo-Guard Water Leak Mitigation Systems, LLC
    Inventor: Paul Joseph Candela
  • Patent number: 6812846
    Abstract: Cameras and image processing techniques are applied to the problem of spill detection. Fixed background data may be removed using a technique based on image subtraction. The remainder of one or more images may be segmented. The segments may then be tested to identify and remove from further analysis segments corresponding to non-spill foreground objects, for example by forming luminance and/or chrominance profiles to detect the presence of a high rate of specular albido that would be associated with a wet spill. Further testing may be done, for example by determining if a segment corresponds to a planar object lying in the plane of the floor using planar projection transforms and multiple cameras. If a segment is likely to indicate a spill, a notification may be generated.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: November 2, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Srinivas Gutta, Vasanth Philomin
  • Patent number: 6810902
    Abstract: A control circuit for a plumbing device that has a drain line and a water supply line includes a water sensor generating a potential overflow level signal in response to the water level in the plumbing device caused from a restricted drain line, an electrically controlled valve coupled to the drain line, and a controller coupled to the water sensor and the valve. The controller closes the valve in response to the potential overflow level signal.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: November 2, 2004
    Inventor: Anthony M. Bootka
  • Patent number: 6802084
    Abstract: A leak detection and reporting system for detecting and reporting different types of leaks. Different alarms are activated in response to different types of leaks. The present invention includes a timing module and a water flow sensor. The timing module measures a standard fill time required to properly fill a reservoir. A lower time threshold and an upper time threshold are then calculated based upon the standard fill time. A first alarm may be activated if a subsequent fill time is below the lower time threshold to identify a small leak. Also, a second alarm may be activated if a subsequent fill time is above the upper time threshold to identify a larger leak.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: October 12, 2004
    Assignee: Ghertner Automation, Inc.
    Inventors: Steve Ghertner, Vince Luciani
  • Publication number: 20040182136
    Abstract: A storage tank leak detection and prevention system that detects a breach or leak in the interstitial space of a double-walled fuel storage tank in a service station environment. The interstitial space is placed under a vacuum using a submersible turbine pump that is also used to pump fuel to the fuel dispensers in the service station and therefore a separate vacuum generating source is not required. A sensing unit and/or tank monitor monitors the vacuum level in the interstitial space over time. If a significant vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum level, a catastrophic leak detection alarm is generated. If a minor vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum, a precision leak detection alarm is generated. Functional tests also ensure that the leak detection system is functioning properly.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 23, 2004
    Inventors: Don Halla, Richard Dolson, Robert P. Hart, Richard Lucas, Ray Hutchinson, Kent Reid
  • Patent number: 6789411
    Abstract: An apparatus for permanently or semi-permanently fitting to an underground water pipe 15,16 for detecting leaks therein, comprises a hydrophone 26 mounted to acoustically monitor water flowing along the pipe 15,16 and means 29 for analyzing a parameter of the output signal of the hydrophone 26 and for generating an alarm signal, in the event that the parameter is above a maximum value or below a minimum value. The apparatus further comprises a radio transmitter for transmitting the alarm signal to a remote receiver, so as to indicate the detection of a leak. The maximum and minimum values are preferably calculated using historical data obtained from the hydrophone 26, so that the values are automatically adjusted to suit location of the apparatus. In use, a plurality of leak detection apparatus can be installed to pipes at various locations around a geographical area of supply.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 14, 2004
    Assignee: Palmer Environmental Limited
    Inventor: Keith John Roy
  • Publication number: 20040164868
    Abstract: The invention relates to a carbon dioxide fire extinguishing device comprising a capacitive measuring device (11) which is calibrated for a temperature range above and below the critical temperature of carbon dioxide and which is used to detect the amount of gas loss from a carbon dioxide pressure tank (10). The carbon dioxide fire extinguishing device comprises an outlet valve in which the capacitive measuring probe (12) is integrated in such an advantageous way that the outflow resistance of the extinguishing gas is hardly increased at all.
    Type: Application
    Filed: January 29, 2003
    Publication date: August 26, 2004
    Inventor: Andreas Thomas
  • Publication number: 20040155784
    Abstract: A liquid flow mitigation system comprising a systems interface, a liquid arresting mechanism operable to impede flow of a liquid, a control device operable to produce an input to the systems interface representing a request to impede flow of the liquid, and a liquid utilizing device operable to produce an input to the systems interface representing a request for liquid flow. The systems interface directs the liquid arresting mechanism to impede liquid flow when the systems interface is in receipt of an input from the control device. The systems interface directs the liquid arresting mechanism to permit liquid flow when the systems interface is in receipt of an input from the water utilizing device.
    Type: Application
    Filed: February 4, 2004
    Publication date: August 12, 2004
    Inventor: Paul Joseph Candela
  • Patent number: 6756521
    Abstract: A moisture sensing and indicating system for signaling to a caretaker that a diaper has moisture therein. The moisture sensing and indicating system includes a casing having a plurality of apertures therein for accessing an interior of the casing. The casing is positioned between absorbent material and watertight material of a diaper. A sensor for detecting moisture is positioned in the casing. Moisture actuates the sensor by completing a circuit. A transmitter for transmitting a signal is positioned in the casing and operationally coupled to the sensor. A housing has a top wall, a bottom wall and a peripheral wall extending between integrally coupled to the top and bottom walls. The top wall has a plurality of openings therein. A receiver for receiving a signal from the transmitter is positioned in the housing. A speaker for emitting a sound is securely positioned in the housing and traverses the openings in the top wall. The speaker is operationally coupled to the receiver.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: June 29, 2004
    Inventor: Norbert Breitkopf
  • Patent number: 6732571
    Abstract: The invention relates to a film leak detector with two films (5, 6) each stretched in a frame (3, 4); in order to attain a simple and stable structuring, it is proposed that each of the frames (3, 4) is comprised of two synthetic material subframes between which the particular film (5, 6) is fastened.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: May 11, 2004
    Assignee: Inficon GmbH
    Inventor: Rudolf Flosbach
  • Patent number: 6731216
    Abstract: A tubing installation checking device is provided for determining proper installation of a tubing along a tube receiving channel in a peristaltic pump of the type having a tube receiving channel and a door for holding a tubing therein. The tubing installation checking device includes a pressure sensor held in the peristaltic pump positioned along the tube receiving channel downstream from the pumping mechanism for sensing pressure in the tubing and for providing a signal representing the sensed pressure. A valve is provided held in the peristaltic pump along the tube receiving channel downstream from the pressure sensor for closing the tubing when it is installed in the tube receiving channel.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: May 4, 2004
    Assignee: B. Braun Medical, Inc.
    Inventors: Chen Ho, Thinh Vo, Roger J. Hill
  • Patent number: 6731215
    Abstract: A leakage response system for an appliance includes a leakage sensor which is operative to change an electrical parameter upon contact by a conductive liquid, a controller circuit electrically coupled with the strip for generating an activation signal in response to contact of the strip by a conductive liquid and a response device coupled with the controller circuit and activated by the signal. The sensor includes a mat which is constructed of top and bottom outer layers of electrically conductive fabric separated by a central nonconductive fabric layer; and a pair of fusing layers fusing the top and bottom layers to the central nonconductive layer. The sensor may also include a pair of conductive pins for installation into a surface for detecting moisture hidden within the surface. The response device may include an audible alarm and/or a valve for shutting off the water flow in the appliance water supply line.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: May 4, 2004
    Inventors: Frederick H. Harms, Charles McKenzie
  • Patent number: 6725878
    Abstract: A gas leakage detection system includes a flow path, a dual mode valve disposed in the flow path, an ultrasonic measuring section including a pair of ultrasonic transducers, disposed in the flow path upstream from the dual mode valve, a flow rate calculation section for computing a flow rate based on a signal from the ultrasonic measuring section, and a control section for controlling the dual mode valve. The control section closes or opens the dual mode valve instantaneously, and the flow rate calculation section computes a flow rate when the dual mode valve is closed. Thus, gas leakage can be decided substantially without stopping a gas flow when a user is using the gas.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: April 27, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Motoyuki Nawa, Shigeru Iwanaga, Mitsuo Nanba
  • Patent number: 6722185
    Abstract: The present invention relates to detection and alarm systems for predicting and detecting the location of spills, leaks, emissions, and/or pollution sources, i.e., unwanted fluid (liquid/gas) flow/escape, at refineries, e.g., oil and gas refineries, and plants, e.g., petrochemical, chemical, pharmaceutical, and food processing plants, and avoiding said unwanted flow/escape. According to one embodiment, said system comprises at least one detector, at least one battery powered radio frequency transmitter, preferably, according to one embodiment, a 900 megahertz spread spectrum transmitter, and a central processing location which, according to one embodiment, is preferably capable of handling up to 3000 points in a single cell site.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: April 20, 2004
    Assignee: Fedd Systems Inc.
    Inventors: Rick A. Lawson, Michael S. Kelly
  • Patent number: 6723932
    Abstract: A water-immersed switch which does not conduct electricity in the absence of a dielectric liquid, such as water, and which conducts electricity in the presence of the dielectric liquid. The water-immersed switch includes a modified copolymer containing acrylonitrile and at least one of styrene and/or a conjugated diene, as constituent units, and acidic groups introduced into said modified copolymer, and a plurality of electrically conductive electrodes.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: April 20, 2004
    Assignee: Sony Corporation
    Inventors: Hiroshi Ohki, Haruo Watanabe, Yasuhito Inagaki, Tsutomu Noguchi
  • Patent number: 6720882
    Abstract: A system for monitoring a structure includes cavities on an outer surface and a fluid source at substantially constant pressure coupled to the cavities through high fluid impedances to create pressure differentials therebetween. A telemetry system has pressure differential switches across each of the high impedances for monitoring differential pressure changes across the impedances and providing a signal indicative of the location of the cavity associated with the high impedance across which the change is monitored. A fluid capacitance is associated with each cavity and the corresponding impedances to facilitate a transient fluid flow through the impedances.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: April 13, 2004
    Assignee: Structural Monitoring Systems Ltd.
    Inventor: Kenneth John Davey
  • Publication number: 20040046670
    Abstract: A storage tank monitoring system may include a stored media sensor adapted to sense a storage tank media parameter which may responsively generate a stored media signal, a blanket gas sensor adapted to sense a storage tank blanket gas parameter which may responsively generate a blanket gas signal, and a blanket gas flow sensor adapted to sense the flow of blanket gas which may responsively generate a blanket gas flow signal. The storage tank system may further include a controller unit adapted to receive at least one of the stored media signal and the blanket gas signal, and the blanket gas flow signal, and responsively generate a blanket gas leak indicator signal. As such, a blanket gas leak indicator includes at least one of a first and a second state wherein the first state is indicative of a blanket gas leak and the second state is indicative of no blanket gas leaks.
    Type: Application
    Filed: September 5, 2002
    Publication date: March 11, 2004
    Inventors: Paul R. Adams, Bruce F. Grumstrup
  • Publication number: 20040046671
    Abstract: A fluid leak detection device includes a platform having at least one fluid concentration zone forming a fluid detection area. Two electrically conductive members are positioned in the fluid concentration zone such that a gap is formed between the electrically conductive members. A fluid detector is coupled to the electrically conductive members and is configured to generate a fluid detection signal in response to the presence of a fluid between the electrically conductive members. A notification system is coupled to the fluid detector, wherein the notification system is activated in response to the fluid detection signal.
    Type: Application
    Filed: September 3, 2003
    Publication date: March 11, 2004
    Inventor: Jeffrey A. Ninberg