Entries |
Document | Title | Date |
20080202211 | Gas Sensor and Method For Operating a Getter Pump - The invention relates to a gas sensor comprising a pump chamber ( | 08-28-2008 |
20080202212 | Methods and apparatus for test gas leak detection - A leak detector includes a leak detector inlet to receive a test gas, a vacuum pump coupled to the leak detector inlet, a test gas sensing unit connected through a passage to the leak detector inlet, to sense the test gas, a membrane that is permeable to the test gas, the membrane disposed in the passage between the leak detector inlet and the test gas sensing unit, and a control mechanism to substantially terminate transmission of the test gas through the membrane in a time of 500 milliseconds or less. In other embodiments, the control mechanism substantially terminates transmission of the test gas through the membrane in a time of 100 milliseconds or less. | 08-28-2008 |
20080276692 | Leak Indicator Comprising a Sniffer Probe - The leak detector comprises a basic device ( | 11-13-2008 |
20080295580 | METHOD OF DETERMINING THE COMPONENTS OF A FLUOROOLEFIN COMPOSITION, METHOD OF RECHARGING A FLUID SYSTEM IN RESPONSE THERETO, AND SENSORS USED THEREFOR - Disclosed are a method of determining the components of a fluoroolefin composition, a method of recharging a fluid system in which the composition is used, and sensors used therefor. In particular, the composition may be a fluoroolefin refrigerant composition used within a vapor compression system, where the refrigerant composition is useful in cooling systems as replacements for existing refrigerants with higher global warming potential. Such fluoroolefin refrigerant compositions have double bond structures which make them particularly well suited with sensing technologies, including: infrared sensors, UV/vis sensors, NIR sensors, ion mobility or plasma chromatographs, gas chromatography, refractometry, mass spectroscopy, high temperature thick film sensors, thin film field effect sensors, pellistor sensors, Taguchi sensors and quartz microbalance sensors. | 12-04-2008 |
20080307858 | Apparatus and Process for Leak-Testing and Qualification of Fluid Dispensing Vessels | 12-18-2008 |
20090013766 | Method and device for detecting leaks - In leak detection, the signal generated by a test gas is superposed by interferences which fade as the vacuum generation in a container proceeds. Depending on the negative slope of the volume signal (MS), a lower indication limit (AG) is calculated. Upon activation of a zero function, the volume signal (MS) is not reduced to zero but only to the level of the indication limit (AG). Any exceeding of the indication limit is identified as a leak. Thus, the maximum sensitivity of the leak detection is guaranteed at any time. | 01-15-2009 |
20090064765 | Method of Manufacturing Semiconductor Device - A method of manufacturing a semiconductor device including the step of: carrying a substrate into a reaction tube; processing the substrate by supplying a gas into the reaction tube from a gas supply line, while exhausting an inside of the reaction tube through the exhaust line by means of an exhaust device and controlling pressure in the reaction tube on the basis of an output from a pressure sensor provided in the exhaust line; carrying the processed substrate out from the reaction tube; and carrying out a leakage check for a gas flowing path including the gas supply line, the reaction tube and the exhaust line, wherein, in the step of carrying out the leakage check, the gas flowing path is divided into plural sections connecting with at least the pressure sensor and the exhaust device, the respective sections are exhausted by means of the exhaust device with an upstream end of each section being closed and pressure in each section is measured by means of the pressure sensor to judge for every section whether leakage is found in the gas flowing path or not on the basis of the measured pressure. | 03-12-2009 |
20090100909 | Leak testing method and leak testing device - A leak testing device includes a chamber which is hermetically sealed towards the environment, having a test object filled with a test gas that is positioned in the chamber. In the chamber, a partial-pressure sensor is arranged that selectively responds to the test gas, but not to the filler gas. Thus, a leak test can be simply performed without high vacuum and without mass spectrometers. | 04-23-2009 |
20090113995 | METHOD AND APPARATUS FOR LEAK DETECTION - Methods and apparatuses are disclosed for detecting small leaks in double wall containers using enhanced tracer dispersal and detection techniques. More specifically, economical, substantially closed leak detection apparatuses, methods and systems are disclosed that conserve interstitial fluid between container walls enhancing the duration and sensitivity of leak detection testing. | 05-07-2009 |
20090120165 | Sampling Leak Detector - A sampling leak detector which comprises a basic device and a sniffling probe connected thereto via a tube. A visual display is located on the sniffling probe. A tactile indicator is provided in a handle. An acoustic indicator is arranged on the basic device. The detector can be switched to a detection mode in which the color in the visual display changes and the indicator are activated when a predetermined leakage rate is exceeded. The detector can also be switched to a locating mode in which leakage rate information is displayed by means of a bar of variable length and a sound is generated which has a parameter depending on the leakage rate information. | 05-14-2009 |
20090145200 | HEAT EXCHANGER LEAK TESTING METHOD AND APPARATUS - A method for detecting the presence of a leak between two fluid paths of an assembled plate heat exchanger by evacuating one or both fluid paths to a low pressure, introducing a test gas to one of the fluid paths to create a pressure differential between the fluid paths, and testing for the presence of test gas in the second fluid path. | 06-11-2009 |
20090173144 | Leak detection system with controlled differential pressure - A system for detecting leaks in a unit. The novel system includes a first mechanism for injecting a first gas into an interior or an exterior of the unit, a second mechanism for sampling gas from an exterior or an interior of the unit to determine if the first gas has leaked out of or into the unit, respectively, and a third mechanism for controlling a differential pressure between the interior and exterior of the unit during sampling. In an illustrative embodiment, the differential pressure is controlled by injecting a second gas into the exterior or interior of the unit to replace the sampled gas, and using pressure regulators to control the pressures of the first and second gases such that the differential pressure remains constant during sampling. | 07-09-2009 |
20090188301 | FACEPLATE CONNECTION ASSEMBLY AND METHOD - A faceplate connection assembly and method adapted to promote detection of a missing or defective seal element. The faceplate connection includes a surface member having a pair of opposing face elements. A seal seating depression adapted to accept a compressible seal element disposed at least partially across at least one face. A fluid transport channel of open groove construction is disposed in intersecting relation to the seal seating depression. The fluid transport channel is in fluid communication with a port at an exterior portion of the faceplate connection assembly. According to the method a tracer fluid is introduced at a predefined edge of the seal seating depression and migration of the tracer fluid across the seal seating depression is monitored. Detection of migration across the seal seating depression indicates a missing or defective seal element. | 07-30-2009 |
20090188302 | Leak Detector - A leak detector comprising a base appliance provided with a gas detector, a vacuum pump, and a control device. A sniffer probe is connected to the base appliance. A test leak device containing the supply of test gas is arranged in a separate sub-housing. The sub-housing also contains a temperature sensor, a processor, and a data memory. The processor corrects the measured temperature according to a sample, and modulates the light of a light barrier. The processor is connected to the control device in the base appliance by a data cable. | 07-30-2009 |
20090188303 | GAS METER - A gas meter with a simple structure for detecting a range from a minute flow rate, such as a gas leak, to the large flow rate of the normal state of use of the gas, while protecting the flow rate sensor from dust and without producing the problem of pressure loss. First, second, and third flow paths for carrying partial flows of a gas to be measured, in accordance with the flow rate, are provided by partitioning, in parallel, the cross-sectional surface of a main flow path. A flow rate sensor for flow rate measurement is provided in the first flow path with a small flow path cross-sectional area, and a flow rate sensor for detecting a gas leak is provided in the second flow path with a small flow path cross-sectional area, where a flow baffling filter is provided on one end side or both ends of the first and second flow paths, and a contaminant (dust) removing filter is provided on one end side or both ends of the first flow path. | 07-30-2009 |
20090193876 | Sniffer lead detector comprising a detector with a quartz window - A sniffer leak detector comprising a detector with a quartz window, the window being selectively permeable to a tracer gas. The quartz window is located in a suction chamber that is connected to a vacuum pump. To reduce the response time, a gas guidance plate is situated in the suction chamber, the guidance plate and quartz window together delimiting a narrow gas guidance chamber. | 08-06-2009 |
20090211340 | PURGE VALVE LEAK DIAGNOSTIC SYSTEMS AND METHODS - A leak diagnostic system for a vehicle comprises a tank pressure module and a leak diagnostic module. The tank pressure module selectively outputs first and second fuel tank pressures when an engine is shut down and when engine vacuum is greater than a predetermined engine vacuum, respectively. The leak diagnostic module selectively diagnoses a leak in a fuel vapor purge valve based on the second fuel tank pressure when the first fuel tank pressure is less than a first predetermined pressure. | 08-27-2009 |
20090266147 | FLOW DIAGNOSIS APPARATUS FOR FUEL VAPOR PURGE SYSTEM - A pressure sensor senses a pressure of a fuel vapor system at a fuel vapor passage. An electronic control unit executes a post-depressurization period flow diagnosis to determine whether the fuel vapor passage is clogged based on a behavior of the pressure in the fuel vapor system, which is sensed with the pressure sensor in a sealed state of the fuel vapor system after introduction of a negative pressure into the fuel vapor system. | 10-29-2009 |
20090277249 | METHOD AND DEVICE FOR DETERMINING THE QUALITY OF SEAL OF A TEST OBJECT - The invention relates to a method for determining the quality of seal of a test object, a test object being initially arranged in a test chamber. The test object is filled with a tracer gas at a pressure exceeding that of the test chamber. The gas volume in the test chamber is then circulated through an external circuit, coupled to the test chamber, which includes a measuring chamber. The measurement of a quantitative parameter of the tracer gas is carried out with a sensor, arranged in the measuring chamber for carrying out said measurement and is within the circulated gas flow. The invention further relates to a device for determining the quality of seal of a test object, by means of which the above method can be carried out. | 11-12-2009 |
20090277250 | SNIFFER LEAK DETECTOR - A sniffing leak detector which comprises a mass spectrometer, a turbomolecular pump and a forevacuum pump. In case that the sniffing hose with the hand-operated sniffing probe becomes detached from the main device, atmospheric pressure would pass into the gas inlet conduit and disrupt the high vacuum in the mass spectrometer. In order to protect the mass spectrometer and the vacuum pump apparatus, a flow restrictor with an upstream filter is arranged in the gas inlet conduit. | 11-12-2009 |
20090277251 | LEAK DIAGNOSTIC APPARATUS FOR AN EVAPORATIVE EMISSION CONTROL SYSTEM - A leak diagnostic apparatus is provided for an evaporative emission control system that purges fuel vapor from an inside of a fuel tank to an intake passage of an internal combustion engine. The leak diagnostic apparatus is basically provided with a pressure detecting device and a leak determining device. The pressure detecting device is configured and arranged to detect a pressure inside the evaporative emission control system, which includes the fuel tank. The leak determining device sets a leak determination threshold value in accordance with a deformation amount of the fuel tank, and determines if a leak exists by comparing the pressure inside the evaporative emission control system while the evaporative emission control system is sealed to the leak determination threshold value. | 11-12-2009 |
20090288477 | Leakage Search Assembly Having a Sniffing Probe - The leakage search assembly has a main device which contains a vacuum pump and a test gas sensor, and a hand-held sniffing probe. Capillary lines which connect the sniffing probe to the basic assembly contain valves by means of which these lines can be selectively opened. In a leakage search mode, the capillary line having the larger cross section is open. This results in leaks also being found from a greater distance. The dead time before response of the test gas sensor is shortened. Once a leak has been located, the assembly is switched to the leakage rate measurement mode, in which only the capillary line with the smaller cross section is open. This results in quantitative determination of the leakage rate with high accuracy and high stability. | 11-26-2009 |
20090293592 | METHOD AND APPARATUS FOR MONITORING FOR LEAKS IN A STAGE II FUEL VAPOR RECOVERY SYSTEM - A system and method for detecting a leak in a Stage II vapor recovery system is disclosed. The system may monitor the Stage II vapor recovery system for the occurrence of quiet times and record pressure data during those quiet times. The system may make a determination of a leak based on the evaluation of the pressure data from a plurality of the quiet times. | 12-03-2009 |
20100005861 | SNIFFING LEAK DETECTOR - To achieve a large measurement range from small up to larger leakage rates, a switchover from normal operation to gross operation occurs. In gross operation, the sucked-in gas flow is separated by different throttles, wherein the throttle that leads to the test gas sensor has a low flow rate. This manner of operation prevents a too large quantity of test gas from reaching the sensor surface and contaminating the sensor. In another alternative, in gross operation the test gas flows only across a part of the sensor surface. The other part is flushed. | 01-14-2010 |
20100018293 | METHOD AND APPARATUS FOR THE MEASUREMENT OF ATMOSPHERIC LEAKS IN THE PRESENCE OF CHAMBER OUTGASSING - Embodiments of the present invention employ measurement of argon as the means to detect the presence of an atmospheric leak in a processing chamber. Argon detected inside the process chamber is conclusive evidence of a leak. Furthermore, the amount of detected argon provides information on the rate of air entering through the leak. In one embodiment, leak detection takes place in the main plasma inside the processing chamber. In another embodiment, leak detection takes place in the self-contained plasma generated in a remote plasma sensor. Additional measurements can be performed, such as measuring the amount of oxygen, and/or the presence of moisture to help in detecting and quantifying outgassing from the processing chamber. | 01-28-2010 |
20100024525 | METHOD OF CHECKING THE HERMETICITY OF A CLOSED CAVITY OF A MICROMETRIC COMPONENT AND MICROMETRIC COMPONENT FOR THE IMPLEMENTATION OF THE SAME - In order to check the hermeticity of a closed cavity of at least one micrometric components, said component includes a structure made over or in one portion of a substrates, a cap fixed to one zone of the substrate to protect the structure, and an indicator element whose optical or electrical properties change in the presence of a reactive fluid. The indicator element may be a copper layer for an optical check or a palladium resistor for an electrical check. The micrometric component is placed in a container which is then hermetically closed. This container is filled with a reactive fluid under pressure, which is oxygen for the optical check and hydrogen for the electrical check. The component in the container is subjected to a reactive fluid pressure higher than 10 bars for a determined time period, and to thermal (T>100° C.) or optical (λ<500 nm) activation. After this time period, an optical or electrical check of the indicator element determines the hermeticity of said cavity. | 02-04-2010 |
20100064777 | LEAK DETECTION SYSTEM AND METHOD - A leak detector ( | 03-18-2010 |
20100095745 | CALIBRATION SYSTEMS AND METHODS FOR TRACER GAS LEAK DETECTION - Tracer gas leak detection is provided by a calibration system with a gas leak detector having a test port for receiving a sample containing a tracer gas and coupled to a vacuum pump; a calibrated leak for a calibration sample containing the tracer gas; a mass filter coupled to the test port for receiving the test sample in an operating mode, coupled to the calibrated leak through a calibrated leak valve for receiving the calibration sample in a calibration mode, having controllable transmission of the tracer gas and providing a filtered sample; detector detecting the tracer gas in the filtered sample; a programmable gain element providing a measured value of leak rate in response to the detector signal; and a controller configured, in response to a mode control signal, to operate the leak detector in the calibration mode over two or more working ranges using the calibrated leak. | 04-22-2010 |
20100095746 | Engine Leak Detector and Leak Detection Method - An apparatus and method for leak detection through use of an adapter containing a chamber, an air pressurization port, and detection media instillation port. The apparatus is sealingly or relatively sealingly coupled to a turbo inlet air duct on an internal combustion engine under study, such that the apparatus chamber communicates with the engine's interior void. The apparatus permits pressurized air and detective media, such as smoke or fog, to be introduced through the chamber and into the void of an engine to determine the presence and location of engine system leaks. | 04-22-2010 |
20100101306 | ODORANT ADDITION DEVICE AND FUEL GAS SUPPLY SYSTEM - An odorant addition device for adding odorant to fuel gas in a gas system that consumes the fuel gas, the device including: an addition unit for adding the odorant to fuel gas to be consumed by the gas system; an environmental condition detection unit for detecting in the gas system an environmental condition regarding diffusion of odorant in fuel gas; and an addition adjustment unit for adjusting mode of odorant addition by the addition unit based on the environmental condition detected by the environmental condition detection unit. In this way, it is possible to detect leakage of fuel gas more reliably and improve safety dramatically, in a gas system that consumes the fuel gas as fuel. | 04-29-2010 |
20100139373 | MEMS SENSOR PACKAGE - Methods and apparatus for a MEMS sensor package are provided. In one embodiment, a MEMS sensor package comprises a MEMS sensor; a sensor body permeable to gas leakage at a first leak rate; a backfill gas that pressurizes the sensor body to a backfill pressure; wherein the backfill pressure provides a dampening of the MEMS sensor; and wherein the backfill pressure is set such than any increase in pressure within the sensor body due to gas leakage will not cause a deviation in a Q value of the MEMS sensor beyond a predefined range for at least a specified design service life for the MEMS sensor package. | 06-10-2010 |
20100154516 | WATERPROOF TEST METHOD AND WATERPROOF TEST TANK - A method for testing waterproof property of an object designed to prevent water from penetrating into the inside of the object and having a hole, the hole allowing air communication between the inside and the outside of the object, the method includes: attaching closely to the object a tank having an opening hermetically surrounding the hole to form an air communication path between the inside of the object and the tank to form a single air tight space; placing the object to which the tank is attached in an air tight container; either or both of injecting gas into and extracting the air from the air tight container containing the object so as to change the gaseous pressure of the air tight container; and measuring an internal gaseous pressure of the air tight container to determine whether the waterproof property of the object is effective or not. | 06-24-2010 |
20100199747 | GAS METER READING SYSTEM - A gas meter reading system is provided that allows automated meter reading capability to be incorporated with sealed mechanical type gas meters. The reading system is mounted to the window of the meter adjacent to the measurement dial. The reading system senses the rotation of the dial and provides data, such as a pulse, that may be recorded by an external source. A method of detecting for leaks with a gas meter having a reading system is also provided. | 08-12-2010 |
20100199748 | Monitoring Gas Leakage Rates From Hermetically Sealed Devices - A method for monitoring a gas leakage rate from a hermetically sealed device, such as a hermetically sealed data storage device with an interior helium atmosphere. In some embodiments, a diffusion rate of inert gas from a hermetically sealed first device is monitored until steady state diffusion is reached, and a standard time constant for the first device is identified. Next, the diffusion rate is monitored for a second sealed device for a portion of the time required for the first device to achieve steady state diffusion, and the time required for the second device to reach steady state diffusion using the standard time constant is calculated. | 08-12-2010 |
20100206053 | APPARATUS FOR LEAK TESTING PRESSURIZED HOSES - A hose-attaching apparatus for leak-testing a pressurized hose may include a hose-attaching member. A bore may extend through the hose-attaching member. An internal annular cavity may extend coaxially around the bore. At least one of a detector probe hole and a detector probe may be connected to the internal annular cavity. At least a portion of the bore may have a diameter which is at least one of substantially equal to and less than a diameter of a hose to be leak-tested. | 08-19-2010 |
20100206054 | APPARATUS AND METHOD FOR LEAK TESTING - A leak testing apparatus is provided by which temperature change can be surely detected even when an inner space of a workpiece is narrow. | 08-19-2010 |
20100288020 | LEAK DETECTION SYSTEM COMPRISING A TRACER GAS MEDIATING UNIT - A system for detection of a leak at a leakage testing point of a test object by a tracer gas. A positionable tracer gas mediating unit has a tip. A marker is attachable at the leakage testing point. A marker detector is associated with the positionable tracer gas mediating unit. The tip of the tracer gas mediating unit is arranged to be positioned within a predetermined distance interval from the marker during a leak detection test. The marker detector is arranged to detect the marker when the tip is positioned within the predetermined distance interval so as to certify a correct positioning of the tip. | 11-18-2010 |
20100288021 | APPARATUS AND METHOD FOR CHECKING LEAKAGE FROM FUEL VAPOR PROCESSING APPARATUS - An apparatus for checking leakage from a fuel vapor processing apparatus includes an interrupting device capable of interrupting communication between a canister and a fuel tank when a pressure within the canister is negative and a pressure within the fuel tank is positive. A first pressure detecting device can detect the pressure within the canister or its equivalent. A second pressure detecting device can detect the pressure within the fuel tank or its equivalent. | 11-18-2010 |
20100294026 | SNIFFING LEAK DETECTOR - A sniffing leak detector which comprises a first suction line in a sniffing probe, the line leading to a main device, is provided with a larger second suction line through which gas is sucked in from the sniffing tip by a gas delivery pump. By connecting the second suction line, the distance sensitivity is increased. By disconnecting the second suction line, on the other hand, the sensitivity is increased. Thus, it is possible to first search for leaks by use of a high gas throughput and subsequently exactly determine the leaks under the quantitative aspect by use of a reduced flow. | 11-25-2010 |
20100313634 | METHOD AND DEVICE FOR TIGHTNESS TESTING - A test subject, which is filled with test gas, is placed in a testing chamber, which can be evacuated. A carrier gas is conducted into the testing chamber, so that a gas mixture made of carrier gas and test gas forms therein. The gas mixture is suctioned out of the testing chamber by a compressor pump. A testing gas sensor is connected to the outlet of the compressor pump. The test gas is contained in the compressed gas mixture at a partial pressure which is increased by the compression ratio. In this manner, the sensitivity of the test gas recognition is increased and/or the time constant of the measurement is shortened. | 12-16-2010 |
20100326171 | SMOKE GENERATION AND LEAK DETECTION SYSTEM - In accordance with the present invention, there is provided a leak detection device and method of using the same. The leak detection device of the present invention employs the use of phase change vapor generation to provide a visual leak indicator, and is adapted to quickly and accurately identify the location of leaks in many types of fluid systems. The leak detection device and related leak detection methodology of the present invention can be used to identify leaks in many large systems such as HVAC systems and ductwork, transportation containers, recreational vehicles, clean rooms, and any other large sealed system. | 12-30-2010 |
20100326172 | METHOD AND DEVICE FOR CHECKING THE INTEGRITY OF A FLEXIBLE, NONPOROUS BAG WITH ONE OR MORE BELLOWS - There is a bag ( | 12-30-2010 |
20110000284 | Heat Exchanger Leak Testing Method and Apparatus - A method for detecting the presence of a leak between two fluid paths of an assembled plate heat exchanger by evacuating one or both fluid paths to a low pressure, introducing a test gas to one of the fluid paths to create a pressure differential between the fluid paths, and testing for the presence of test gas in the second fluid path. | 01-06-2011 |
20110011163 | METHOD FOR TESTING A MECHANICAL INTEGRITY OF AN INSULATING LAYER COVERING A CONDUCTOR IN A CABLE - A method for testing a mechanical integrity of an insulating layer covering a conductor in a cable, a longitudinal void being defined inside the insulating layer in a region of the conductor. A first end of the insulating layer is blocked. A compressed gas is injected at a second end of the insulating layer so that the gas enters and travels the longitudinal void inside the insulating layer towards the first end. A gas pressure inside the insulating layer is measured at least near the second end. Injection of the compressed gas is stropped after a predetermined injection time period. A variation of the gas pressure inside the insulating layer is monitored during a diagnostic time window succeeding to a transitional time period following the stopping of the injection. Integrity of the insulating layer is determined based on the variation of the gas pressure during the diagnostic time window. | 01-20-2011 |
20110011164 | APPARATUS AND METHOD FOR THE INTEGRITY TESTING OF FLEXIBLE CONTAINERS - An apparatus for integrity testing a first container having a flexible body at least partially defining a first interior chamber using a second container having a second, preferably sterilized interior chamber at least partially filled with a detectable gas. A sensor associated with a detection chamber for receiving the flexible container, and possibly the second container as well, senses the presence of the detectable gas external to the first interior chamber in the event of a leak of the detectable gas therefrom. Related methods also involve integrity testing of fluid processing bags and other types of flexible containers. | 01-20-2011 |
20110048111 | METHOD OF LEAK TESTING AEROSPACE COMPONENTS - A method includes providing an aerospace electrical component having a wall and a feature that extends through the wall, introducing a detectable residue-free gas on a first side of the wall, and testing for the presence of the detectable gas on a second side of the wall. | 03-03-2011 |
20110100097 | Leakage Seeker - A leak detector having a pre-vacuum feed pump, a gas detector and a flow sensor. The detector also includes a buffer volume and a restrictor to be arranged between the feed pump and the flow sensor. This protects the flow sensor against pressure surges generated by the feed pump. | 05-05-2011 |
20110107819 | AIR FILTER LEAK INSPECTION METHOD - An air filter leak inspection method is provided. First, an aerosol to be filtered containing particles is passed through an air filter having a first edge and a second edge. Next, a leakage inspection unit is provided. The leakage inspection unit includes n probes, wherein n indicates a positive integer. Afterward, a moving procedure is set to make the probes traverse between the first edge and the second edge, thereby scanning the whole portions of the air filter. When the probes move to the second edge, the probes move along the extending direction of the second edge with a designed distance, wherein the designed distance is less than the length of each probe. Besides, the number of times that the probes traversing between the first and the second edge is determined according to the amount of the probe, the length of each probe and the height of the air filter. | 05-12-2011 |
20110113861 | LEAK DETECTOR AND METHOD OF DETECTING LEAK - A leak detector detects the presence or absence of a trace amount of leak from a test piece by using helium gas. The leak detector has a guide pipe and a mass spectrometer. The guide pipe is disposed by insertion into an evacuation pipe which is communicated from a vacuum chamber, in which the test piece is disposed, to a vacuum pump. The guide pipe includes an opening portion which opens in a line of flow inside the evacuation pipe. The mass spectrometer for detecting helium is connected to the guide pipe through a gate valve. | 05-19-2011 |
20110113862 | LEAK DETECTION SYSTEM - A leak detection system has: a test chamber connected to a vacuum pump; a filling device for filling a test piece with helium gas; a transfer device for transferring the test piece between a ready-for-detection position in which the test piece is ready to be carried into the test chamber and a filling-operation position in which the operation of filling helium gas by the filling device is performed; a carrying device for carrying the test piece from the ready-for-detection position to a detection position inside the test chamber; a sealing device for hermetically sealing the test chamber in a state in which the helium-gas-filled test piece is in the detection position; and a leak detector for detecting helium to be leaked out of the test piece when, after having sealed the test chamber by the sealing device, the test chamber is evacuated by the vacuum pump to a predetermined pressure. | 05-19-2011 |
20110132075 | TOOL FOR ASSISTING LEAK TESTING OF AN ENCLOSED VOLUME AND METHOD INCORPORATING THE TOOL - A tool for assisting the leak testing of an enclosed volume is disclosed. The tool may comprise an outer seal defining inside its perimeter an attachment face of the tool. A vacuum port defined in the attachment face is configured to be fluidly coupled to a vacuum source. A nozzle disposed in the attachment face may be coupled to the test port, in fluid communication with the enclosed volume. A primary connection in fluid connection with the nozzle may be placed in fluid connection with the external conduit. A nozzle seal is disposed in the attachment face around the perimeter of the nozzle, such that when the nozzle is coupled to the test port, the nozzle is fluidly isolated from said vacuum port. A leak-test system incorporating at least one tool and a method for leak testing an enclosed volume using the tool are disclosed. | 06-09-2011 |
20110132076 | PRODUCTION OF A CLEAN GAS, IN PARTICULAR FOR TESTING A PRESSURIZED CONSTRUCTION COMPONENT FOR LEAKS - A process is described for producing a clean gas, which is provided, in particular, for testing a pressurized construction component ( | 06-09-2011 |
20110138885 | VANE PUMP AND EVAPORATION LEAK CHECK SYSTEM USING THE SAME - A vane pump has an upper casing, a lower casing, a rotor and a motor. First to fourth points are defined on an outer peripheral end of a lower flat surface of the lower casing. The first point is farthest from an intersection between an axis of a shaft of the motor and the lower flat surface. A suction passage passing through the third point and a discharge passage passing through the second point are formed between the upper casing and the lower casing. The fourth point is defined in a range from the third point to the first point. The lower flat surface is provided to incline with respect to the axis of the shaft of the motor such that the fourth point is farthest from a motor case of the motor among points on the outer peripheral end. | 06-16-2011 |
20110174060 | AT REST VACUUM STATE FOR VACUUM DECAY LEAK TESTING METHOD AND SYSTEM - A method and apparatus for leak testing of liquid and non-liquid filled rigid and semi-rigid nonporous containers wherein a container is enclosed in a conforming test chamber and subjected to vacuum while the pressure within the chamber is monitored by an absolute pressure transducer, alone or in combination with a second differential transducer, to determine if leaks are present in the container and wherein the test apparatus or system remains under low pressure or vacuum conditions while leak tests are not actively in progress such that the system is maintained at an at-rest low vacuum condition to minimize pressure sensor drift and to eliminate build-up of vapors or gases within the apparatus or test system between tests that may hinder the speed and sensitivity of the leak tests. | 07-21-2011 |
20110179854 | Portable Apparatus for Determining Leaks in Air Ducts - The disclosed portable apparatus for determining leaks in air ducts includes a wheeled cabinet having hand-graspable handles for transport. A front, covered equipment readout includes displays for air duct flow, air duct pressure, blower speed, and smoke generator operation. An on-board variable speed blower control knob also is included on the front panel. Housed within the cart is a variable speed blower, a silencer, a smoke generator, power supply, and multiple venturis of different diameter for different sized air ducts to be tested. | 07-28-2011 |
20110185791 | METHODS AND SYSTEMS FOR EVAPORATIVE COOLING INFRARED THERMOGRAPHIC LEAK DETECTION - A method for leak testing a vessel is described. The method includes providing an environment within the vessel that is at a lower humidity than the environment surrounding the vessel, and using a thermographic imaging system to identify any leaks associated with the vessel. The leaks are identified based on evaporative cooling that occurs when a portion of the lower humidity environment escapes from the vessel and mixes with the higher humidity environment surrounding the vessel. | 08-04-2011 |
20110197659 | METHOD FOR DETERMINING AN OVERALL LEAKAGE RATE OF A VACUUM SYSTEM AND VACUUM SYSTEM - An overall leakage rate of a vacuum system which can be operated continuously or cyclically is determined. The vacuum system includes at least one process chamber ( | 08-18-2011 |
20110219855 | METHOD AND DEVICE FOR DETECTING LEAKS IN AN UNDERGROUND LIQUID PIPE, PARTICULARLY A WATER PIPE - The invention relates to a method for detecting leaks in an underground liquid pipe (T), particularly a water pipe, into which a gas is fed through a diffuser ( | 09-15-2011 |
20110247399 | METHOD FOR PERFORMING A LEAK TEST ON A TEST OBJECT - For leak testing, a tracer gas is advanced to the outer wall ( | 10-13-2011 |
20110247400 | LEAK DETECTOR WITH OPTICAL TRACER GAS DETECTION - A leak detector comprises a cell provided with a tracer gas inlet preferably permeable to a tracer gas. In the cell, the tracer gas is caused to assume an energetically higher metastable state. By means of laser spectroscopy the absorption spectrum of the metastable tracer gas is sampled in an optical measuring section, whereby the presence of tracer gas is detected. | 10-13-2011 |
20110247401 | TEST DEVICE FOR PERFORMING LEAK DETECTION AT A PLURALITY OF TEST SITES - The leak detection device comprises a plurality of measuring cells ( | 10-13-2011 |
20110259086 | Leak Detection In Vacuum Bags - A device indicates the location of an air leak in a vacuum bag used to process composite parts. The device includes a layer of material on the inner face of the bag that changes in appearance due to an oxidation-reduction reaction in areas of the layer exposed to oxygen caused by a leak in the bag. | 10-27-2011 |
20110271744 | METHOD FOR DETERMINING LEAK RATE THROUGH A BOND LINE OF A MEMS DEVICE - A method for optimizing direct wafer bond line width for reduction of parasitic capacitance in a MEMS device by reducing the width of a bond line between a first and a second wafer, exposing the MEMS device to a water vapor for a predetermined time period and at a first temperature capable of evaporating water, cooling the MEMS device at a second temperature capable of freezing the water, and operating the MEMS device at a third temperature capable of freezing the water to determine if there is discontinuity during operation. | 11-10-2011 |
20110277541 | REFRIGERANT LEAK DETECTION SYSTEM - A refrigerant leak detection system is provided for a motor vehicle, in which the system includes a heating, ventilating, and air conditioning (HVAC) module having a refrigerant sensor assembly adapted to be fixed within the drain hole of the sump. The refrigerant sensor assembly includes an elongated sensor element extending into the sump, a flange portion having apertures that allows the condensate to drain from sump, a collar portion with self-tapping threads. | 11-17-2011 |
20110283777 | PORTABLE AUTOMOTIVE LEAK DETECTOR - An automotive leak detector having a container of pressurized gas with an ultraviolet dye dispersed therein, flexible tubing, a regulator, and a pressure gauge. The container has an outlet to which the first end of the tubing is connected. The tubing also has a second end, with the second end having an outlet port. The regulator regulates the pressure of the gas and is attached to the tubing intermediate the first end of the tubing and the second end of the tubing. The pressure gauge is attached to the tubing intermediate the regulator and the second end of the tubing. The outlet port is dimensioned to facilitate attachment to the vapor recovery system access port of an automotive vehicle. Preferably the gas is a vapor made visible by shining an ultraviolet light thereon. Preferably the pressure gauge has a range of 0.1-20 pounds per square inch. Preferably the regulator maintains the pressure at the outlet of the tubing at approximately 1.5 pounds per square inch. A method of using the automotive leak detector to detect leaks in closed systems is also disclosed. | 11-24-2011 |
20110290006 | LEAK TEST PROBE FOR USE IN INDUSTRIAL FACILITIES - Methods and apparatus are provided for performing accurate, repeatable leak test measurements in wet, dusty and/or fluid-filled systems, such as a power plant, with no special sampling pumps, carrier gases or separators required. A leak detector probe is installed directly in a pipe or other component carrying a gas flow to be tested and is coupled to the inlet of a leak detector. The leak detector probe includes a test gas permeable membrane, which is positioned in the gas flow to be tested. The test gas permeable membrane may, for example, be positioned in a central region of a pipe in the flow of gas toward the evacuation pump. In some embodiments, the position of the leak detector probe in the pipe or other component may be adjustable. | 12-01-2011 |
20110308301 | LEAK DETECTION SYSTEM - A supersonic tracer gas impingement through-wall leak detection system can detect leaks through a barrier without the need for temporary enclosures or interior pressurization. The leak detection system includes a wand that can flow a mixture of compressed gas, such as air, and a tracer gas through a nozzle. The nozzle may be held close to a barrier to be tested and the pressure supplied against the barrier may be adjusted to achieve the desired exit velocity and resulting stagnation pressure on the surface of the tested barrier. A tracer gas detector or soap solution for visual indication of bubbling can be disposed on the other side of the barrier to detect the presence or absence of the tracer gas. | 12-22-2011 |
20110308302 | METHODS FOR CHECKING LEAKS FROM FUEL VAPOR TREATING APPARATUSES - A method for detecting leak from a fuel vapor treating apparatus defining a first area including a fuel tank and a second area including an adsorbent canister has hermetically closing the fist area, measuring internal pressure of the first area comparing an absolute value of differential pressure between the internal pressure of the first area and the atmospheric pressure with a predetermined value, measuring the internal pressure of the first area in a case that the absolute value is equal to or higher than the predetermined value in order to check for leaks from the first area based on changes in the internal pressure of the first area, fluidly communicating the first area with the second area in order to equilibrate internal pressures of the first area and the second area, hermetically closing the second area, and measuring the internal pressure of the second area in order to check for leaks from the second area based on changes in the internal pressure of the second area. | 12-22-2011 |
20120036920 | DEVICE FOR DETECTING MICRO-LEAKS - Micro-leaks are detected by means of a sniffer device including, in an original manner, a flat suction capsule ( | 02-16-2012 |
20120090383 | SYSTEM AND METHOD FOR DETECTING A REFRIGERANT LEAK AND CHEMICALS PRODUCED AS A RESULT OF HEATING OF THE REFRIGERANT - A system and method for detecting leakage of a refrigerant and chemicals in an air conditioning and heating system. In some cases, a refrigerant may be inadvertently heated via a heating unit to produces dangerous chemicals. A detector can be installed near an air ventilator and can be utilized for detecting the leakage of refrigerant and chemicals that are dispersed in air by a ventilating system. | 04-19-2012 |
20120118048 | SNIFFING LEAK DETECTOR - The invention relates to a sniffing leak detector comprising a sniffing line ( | 05-17-2012 |
20120137751 | APPROACHES FOR DETECTING LEAKS IN A HARD-DISK DRIVE (HDD) COVER - Approaches for a testing apparatus for evaluating a cover of a hard-disk drive. The testing apparatus may detect whether the cover has a defect that prevents the cover from being sufficiently airtight. The testing apparatus includes a base structure that comprises a concave recess shaped to receive the cover to be tested. When the cover is disposed within the concave recess, the cover forms a first chamber in the concave recess between the cover and the base structure. The testing apparatus also includes a removable lid. When the removable lid covers the concave recess with the cover disposed therein, the removable lid forms a second chamber in the concave recess between the cover, the base structure, and the removable lid. The testing apparatus also includes a means for introducing helium gas to one of the chambers and a means for detecting how much helium gas leaks from that chamber. | 06-07-2012 |
20120227467 | DEVICE FOR TESTING PRESSURE RESISTANCE OF VESSEL AND METHOD FOR TESTING PRESSURE RESISTANCE OF VESSEL BY USING THE DEVICE - The present invention relates to a device for testing resist pressure of a vessel wherein gas is stored at a high compressed state, before the use of the vessel, and to a method for testing resist pressure of a vessel by using the testing device. The device includes: the vessel provided as an object to which a resist pressure test is carried out; an elastic tube placed in the interior of the vessel and adapted to fill a liquid into the interior thereof; a pressurizing means adapted to apply a predetermined pressure to the elastic tube to allow the elastic tube to be expanded; and a pressure gauge adapted to gauge the pressure in the interior of the vessel, wherein a gas is filled into the vessel to apply a predetermined pressure to the interior of the vessel by the expansion of the elastic tube. | 09-13-2012 |
20120240664 | FUEL VAPOR LEAK DETECTION DEVICE - A fuel vapor leak detection device for detecting a leakage of fuel vapor includes a pump which pressurizes or depressurizes insides of a fuel tank and a canister, a motor which drives the pump, an electrical current detector which detects a current value applied to the motor, a switching valve, and a controller. The switching valve includes an air passage having a narrowing part therein and communicating with atmosphere, a first passage connecting to the pump, a canister connection passage connecting to the canister, and a second passage connecting to the pump. The controller controls a switching operation of the switching valve based on the current value detected by the electrical current detector to select one of a communication between the air passage and the first passage, and a communication between the canister connection passage and the second passage. | 09-27-2012 |
20120260722 | LEAK TESTING DEVICE AND METHOD - A leak testing device includes a body portion and a purge gas supply. The body portion defines a cavity. The cavity is operable to enclose a portion of a part to be leak tested. The body portion also comprises at least one fluid port operable to deliver a purge gas to the cavity. The purge gas supply is in fluid communication with that at least one fluid port. The purge gas supply is configured to supply a purge gas through the at least one fluid port. The purge gas is operable to purge the cavity of at least a portion of an atmospheric tracer gas contained in the cavity. | 10-18-2012 |
20120266660 | LEAK DETECTION SYSTEM WITH SECURE SEALING MECHANISM - An automotive leak detection system that includes means for forming a secure, leak-proof interconnection between a source of pressurized leak detection vapor and the automobile engine's air induction system ducting or hose. The system includes a sealing mechanism that is specially contoured and configured to matingly interconnect about the opening defined about the distal-most end of the air induction system ducting or hose such that the sealing device and hose form a secure, leak-proof interconnection. The sealing device may be provided with a customized periphery that is designed to correspond and matingly engage with the footprint or specific configuration of the distal end of the air induction system ducting or hose of a specific car manufacturer and/or specific make and model air induction system ducting or system. | 10-25-2012 |
20120272723 | GAS TIGHTNESS TESTING MEMBER AND ELECTRONIC DEVICE HAVING THE SAME - A gas tightness testing member disposed in an electronic device includes a first end, a second end, and a fluid channel penetrating from the first end to the second end. The second end of the gas tightness testing member is combined with the electronic device, and the first end is connected to a gas tightness testing device for performing a gas tightness test. | 11-01-2012 |
20120312079 | METHOD OF SENSING ABNORMAL CONDITION IN HEAT EXCHANGE PROCESS AND HEAT EXCHANGE APPARATUS - A method of sensing an abnormal condition in a heat exchange process, capable of promptly sensing leakage of a process fluid in a process of heat exchange between a heat medium and a process fluid, is provided. With attention being paid in a process of heat exchange between a heat medium which is fused salt including nitrate and/or nitrite and a process fluid including secondary alcohols and/or a dehydrated product thereof to generation of a large amount of hydrogen gas resulting from contact between the leaked process fluid and the heat medium, the present invention is directed to a method of sensing an abnormal condition in a heat exchange process having a sensing step of sensing a hydrogen gas in a vapor phase portion in a flow path for the heat medium. | 12-13-2012 |
20120318048 | LEAK DETECTION DEVICE USING HYDROGEN AS TRACER GAS - The leak detection device using hydrogen as a tracer gas is intended to be connected to an object to be tested. The leak detection device includes a hydrogen sensor placed in a low-pressure enclosure and includes a diode, a resistor, a MOS-type transistor whose gate is covered with a palladium catalyst, a pump connected to the low-pressure enclosure, a pressure gauge configured to measure the pressure in a vacuum line formed by the low-pressure enclosure connected to the pump, and a multiway valve having a first port allowing admission of the gas flow containing the tracer gas into the vacuum line, and a second port allowing the admission of neutral gas. The method makes it possible to stabilize the pressure of the vacuum line in order to avoid fluctuations in the hydrogen measurements. | 12-20-2012 |
20130025349 | Leak detection apparatus and method - A leak detector contains a pump that withdraws gas from a volume into which a tracer gas is leaking. The volume may also contain small amounts of air or other gas in addition to the tracer gas. Downstream from the pump, a flow restriction creates a back pressure between this restriction and the outlet of the pump, the back pressure being determined by the pressure in the test volume, the pumping speed, and the nature of the flow restriction. The flow restriction may be fixed, such as an orifice or a section of a capillary tube, or it may be variable, such as a needle valve. In many cases, the back pressure may be adjusted to approximately one atmosphere, allowing the use there of various conventional gas sensors that are designed to operate at one atmosphere. The invention may also be used for general gas analysis problems. | 01-31-2013 |
20130047707 | LEAK TESTING METHOD AND LEAK TESTING DEVICE FOR IODINE FILTER - A leak testing device for an iodine filter according to the present embodiment includes an iodine adsorption unit including an iodine filter provided in a chamber provided in a duct, to which flue gas containing radioactive iodine is fed, and including an iodine adsorbing material that adsorbs radioactive iodine contained in the flue gas, a fluorine-containing-reagent feed unit that feeds a fluorine-containing reagent that does not contain chlorine into the duct, and a first fluorine-containing-reagent-concentration measurement unit and a second fluorine-containing-reagent-concentration measurement unit that measures a concentration of the fluorine-containing reagent on an upstream side and a downstream side of the iodine filter. | 02-28-2013 |
20130061661 | NON-DESTRUCTIVE METHOD FOR TESTING THE SEAL OF AN ELECTROLYTE OF AN ELECTROCHEMICAL CELL - A method for testing a seal of a part that includes an electrolyte of an electrochemical cell, the method including: forming a closed cavity delimited by a first outer surface of the part including the electrolyte to be tested; contacting a second outer surface of the part, opposite the first surface, with a first fluid; circulating a second fluid, separate from the first fluid, through the closed cavity between an inlet and an outlet of this cavity; and analyzing the fluid extracted via the outlet of the cavity, to detect possible presence of the first fluid. | 03-14-2013 |
20130074583 | LEAK DETECTION METHOD AND SYSTEM FOR A HIGH PRESSURE AUTOMOTIVE FUEL TANK - A vapor management system ( | 03-28-2013 |
20130152673 | GAS VALVE WITH ELECTRONIC VALVE PROVING SYSTEM - This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, a valve assembly may be configured to perform a valve proving test as part of an operational cycle of a combustion appliance coupled to the valve assembly. The valve assembly may include a valve body having a fluid path, first and second valve sealing members translatable between an opened position and a closed position, and one or more pressure sensors in fluid communication with an intermediate volume of the fluid path between the first and second valve sealing members. A valve controller may be in communication with the pressure sensor and may monitor a measure related to a pressure change rate in the intermediate volume. The valve controller may then output a signal if the measure related to a pressure change rate in the intermediate volume meets and/or exceeds a threshold value. | 06-20-2013 |
20130186179 | ePTFE Filter for Aseptic Pharmaceutical Use and Method of Using - A HEPA filter which utilizes spun bond scrim material and ePTFE membrane for use in an aseptic pharmaceutical filtration air handling system for installation and testing is provided. The installation and testing configuration includes the ePTFE filter with a low or ultra-low concentration of challenging aerosol in the upstream side of the filter along with a scanning device for determining the upstream concentration, all completed in situ within a pharmaceutical air handling system. At the downstream side of the ePTFE filter is positioned another scanner which may be a discrete particle scanner for calculating the penetration percentage of the aerosol through the filtering media of ultra-low concentrations. The system and configuration allows for exposure to ePTFE filtration media for certification by low or ultra-low concentrations of oil based challenging compounds. | 07-25-2013 |
20130186180 | High Speed Helium Leak Detection System and Method - Improved high speed helium leak-detection system for storage tanks comprising a mobile enclosure for operation of electrical components of leak detection sensors in Class 1, Division 1, Group D hazardous locations, comprising a rapid exchange purge assembly having pressure control valves, pressure reference controller and vent, a mechanically actuated vortex-type cooler, a helium leak detector having a pumping manifold connected to a sniffer probe hose to provide sample gas from the tank probe to a pair of pumps oriented in parallel. The first pump, downstream of the helium leak detector, draws a sample through the detector, and a second pump provides a rapid transfer of probe sample. The enclosure includes a controller, display and alarm. The enclosure is maintained overpressure to prevent infiltration of hazardous vapors and is continuously purged with com-pressed air. The system provides response time of about 2 seconds, a 5-fold improvement over current systems. | 07-25-2013 |
20130199274 | LEAKAGE INSPECTION APPARATUS AND LEAKAGE INSPECTION METHOD - Provided are a leakage inspection apparatus and a leakage inspection method for inspecting the flow rate of leakage from a tested body disposed in a tested-body chamber | 08-08-2013 |
20130199275 | Leak Detector - Provided is a convenient leak detector which has high detection sensitivity and can quickly start a leak test after the start of vacuuming a test piece, without impairing the capabilities such as fast response to helium gas. The leak detector includes a mass spectrometer tube configured to detect a search gas and a turbo-molecule pump which has a plurality of stages rotors and stators alternately arranged in a housing, the rotors attached to a rotary shaft, and includes a drive source configured to rotationally drive the rotary shaft. An intake port communicating with a test piece TP and a connection port to which the mass spectrometer tube is connected are opened at positions away from each other in a wall surface of the housing, the wall surface facing a rotor of the uppermost stage. | 08-08-2013 |
20130247652 | UPPER COUPLER ASSEMBLY AND INSPECTION METHOD THEREFOR - Upper coupler assemblies for mounting coupling devices to trailers, and methods for inspecting upper coupler assemblies. The upper coupler assemblies include a housing having first and second members that define a cavity therebetween. At least the second member has a through-hole adapted to receive a coupling device, such as a kingpin. The cavity contains at least one fluid-tight chamber, more preferably multiple gas-tight and liquid-tight chambers by walls within the cavity. The coupler assembly has at least one fluid inlet for introducing and/or withdrawing a fluid (liquid and/or gas) from one or more of the chambers. The integrity of the upper coupler assembly can be evaluated by introducing or removing a gas from the one or more chambers and detecting the presence of any gas leaks in the one or more chambers. | 09-26-2013 |
20140013828 | METHOD AND APPARATUS FOR TESTING THE SEAL OF A JUNCTION LINER - A method and apparatus for testing the seal of a junction liner assembly is provided. The liner assembly includes a main liner member and a lateral liner tube extending from the main liner member. The lateral liner is attached to the main liner. To determine if there is a leak in the assembly, the assembly is placed on a plate with perforations. A negative pressure source pulls the liner assembly tightly against the plate. A colored liquid is applied to the liner assembly under the negative pressure. The assembly is then viewed to determine if any of the colored liquid has passed through the liners, which would indicate a leak in the assembly. The leak is repaired, and the assembly is then retested with a different color to test for any additional leaks. | 01-16-2014 |
20140069174 | OIL TRANSPORTING VAPORIZER FOR A SMOKE GENERATING APPARATUS TO DETECT LEAKS IN A FLUID SYSTEM - An oil transporting vaporizer for a smoke generating apparatus to generate smoke to be supplied to a closed system to be tested for leaks. In a preferred embodiment, the vaporizer includes a hollow tube that is manufactured from a high temperature, fire resistant, porous material (e.g., ceramic). The vaporizer stands in a reservoir of oil such that some of the porous tube is filled with oil from the reservoir. A heater wire surrounds the outside of the porous tube above the oil within the tube. A gas (e.g., air) is blown into the porous tube and towards the oil to cause a mixture of air and gas to move through the tube. Because of its porosity, the air/oil mixture permeates the tube in the vicinity of the heater wire so as to be vaporized into smoke when the heater wire is energized. | 03-13-2014 |
20140076034 | TESTING FIXTURE AND TESTING METHOD - A testing fixture and a testing method are provided. The testing fixture is configured to be assembled to an accommodating space of an electronic device. The testing fixture has a connector configured to communicate a gas controlling apparatus. The gas controlling apparatus controls the gas pressure inside the electronic device through the connector and the testing fixture, so as to perform a gasproof test. | 03-20-2014 |
20140083168 | BALLOON CATHETER APPARATUS FOR HIGH PRESSURE LEAK DETECTION - An inflatable, balloon-type catheter apparatus which is conformable to fit most all intake and exhaust systems to delivery pressure (with or without smoke) to test the fluid integrity of the fluid system. The device is configured to be inserted into the canal of the intake or exhaust system and inflated to seal off the fluid system. The pressurized smoke is passed through the inflated inlet adapter to test for leaks. | 03-27-2014 |
20140090448 | DETECTION APPARATUS FOR DETECTING LEAKS IN AN AIR-TIGHT COMPONENT AND RELATED DETECTION PROCESS - A detection apparatus for detecting leaks in items using tracer gas. The apparatus comprises a plurality of cells which are provided so as to receive an item to be subjected to separate phases of a detection process in order to detect the leaks, and a detection system using tracer gas provided to be connected via suitable connection devices to each cell of the plurality of cells in order to carry out the various phases of the detection process, wherein the cells are positioned on a moving device in order to be successively moved towards separate work stations of the apparatus in order to be subjected to the separate phases of the detection process. | 04-03-2014 |
20140096595 | METHOD AND DEVICE FOR TIGHTNESS TESTING - A method for tightness testing, wherein an evacuated test object is exposed to the external influence of a test gas and wherein a gas mixture made of a test gas withdrawn from the test object and of a carrier gas, is examined for the presence of test gas by use of a test gas sensor which, when viewed in the flow direction of the gas mixture, is arranged downstream of a condensing pump for analyzing the compressed gas mixture, wherein the test object is exposed to the ambient atmosphere without being surrounded by a test chamber, and that a test gas gun is provided for generating the atmosphere containing the test gas. | 04-10-2014 |
20140109655 | CABLE CONDITION MONITORING DEVICE - A cable condition monitoring device for monitoring a damaged condition of a cable including a conductor part including a plurality of element wires and an insulating material part formed on a periphery of the conductor part includes a gas feeding device configured to feed a compressed gas into the conductor part, a pressure gauge configured to measure a pressure in the conductor part, and an insulating material part damage judgment part configured to judge whether the insulating material part is damaged or not based on the pressure measured by the pressure gauge. | 04-24-2014 |
20140260553 | DETECTION DEVICE FOR DETECTING AT LEAST ONE FAULT STATE - Detection device for detecting at least one fault state includes at least one tracer unit that includes, in at least one operating state, at least one specifically added tracer substance, and at least one detection unit for detecting a portion of material that has been released from the at least one tracer substance. | 09-18-2014 |
20140373602 | Method Of Testing The Integrity Of A Second Seal Of An Electrical Insulator - An insulator for separating two objects with different electrical potential, the insulator including an insulating body enclosing a first volume for housing a gas, the body being provided with an opening, and a sealing arrangement arranged to seal the opening in the body and including a first gas-tight sealing element for sealing the opening and provided with a first closable opening, and a second gas-tight sealing element for sealing the opening, and arranged inside the first sealing element so that the first and second sealing elements define a second volume significantly smaller than the first volume. The second sealing element is provided with a second closable opening which in cooperation with the first closable opening enable control of the gas pressure in the first volume. Methods for leakage detection of the insulator are also disclosed. | 12-25-2014 |
20150068288 | LEAK LOCATION DETECTION SYSTEM - The present application pertains to a method of detecting and locating leaks in pipes having a secondary containment vessel. More particularly, the present application pertains to a method of leak detection whereby a tracer gas is introduced into the secondary containment vessel and detected in the primary pipe to determine the location of a leak in a primary pipe. | 03-12-2015 |
20150090007 | METHOD FOR DETECTING LEAKS IN AIRCRAFT WINGS - A method is provided for detecting leaks in the wing of an aircraft prior to the fitting of the wing to the rest of the aircraft. A wing sealing assembly for sealing the wing of an aircraft so that the wing may be leak-tested is also described. | 04-02-2015 |
20150090008 | INFERENTIAL METHOD AND SYSTEM FOR EVAP SYSTEM LEAK DETECTION - A method for detecting leaks in an evaporative emission control system. The method begins by activating a PCM at a selected interval, for a selected period. During the selected period, the PCM monitors system pressure and temperature. The PCM then determines a relationship between changes in system temperature and changes in system pressure, and it identifies a leak based on predetermined criteria related to the relationship. The relationship can be the ideal gas law, which allows the calculation of an expected pressure, based upon differences in temperature. If the actual pressure is considerably below the expected pressure, then one can infer the presence of a leak. | 04-02-2015 |
20150096355 | FAILURE DETERMINATION DEVICES FOR FUEL VAPOR PROCESSING SYSTEMS - A failure detecting device for a fuel vapor processing system may include a leakage determination device configured to determine leakage of fuel vapor from a target region of the fuel vapor processing system. The leakage determination device may include a canister closed valve provided in an atmospheric passage connected between a canister and an atmosphere. The canister closed valve may switch between an open position and a closed upon receiving a supply of electric power, and may maintain the open position or the closed position when no electric power is received. | 04-09-2015 |
20150114091 | COMBINATION SMOKE MACHINE AND NITROGEN GENERATOR - A portable, hand-held combination smoke machine and nitrogen generator having particular application for supplying a mixture of smoke and inert, non-combustible nitrogen gas to a closed fluid system (e.g., the evaporative or air brake system of a motor vehicle) so that the presence and location of a leak can be detected. The nitrogen generator is preferably a compact, commercially-available nitrogen generating membrane tube that is sized to be grasped and lifted in the hand of a user. The smoke machine has a smoke generator device that is adapted to produce smoke and is coupled to the nitrogen generating membrane tube so that a supply of nitrogen gas is delivered from the tube to the smoke generator device at which to be mixed with smoke. The nitrogen gas carries the smoke outwardly from the smoke generator device of the smoke machine to the system being tested for leaks. | 04-30-2015 |
20150114092 | Filling Implantable Medical Devices for Leak Checking - A method for introducing an analyte gas into a cavity of an implantable medical device includes analyzing gas that exits the cavity through an outlet in communication with the cavity and introducing an analyte gas into the cavity via an inlet in communication with the cavity until the composition of the gas exiting the cavity comprises a predetermined percent or amount of the analyte gas. The inlet and outlet may be sealed, and the device may be leak tested. | 04-30-2015 |
20150292975 | METHOD AND SYSTEM FOR DETECTING COOLANT LEAKS IN GENERATORS - A system and method for detecting a gas leak in a generator is provided. The system includes a source of a non-corrosive tracer gas, and a subsystem for introducing the non-corrosive tracer gas into the hydrogen cooled generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the hydrogen cooled generator and the non-corrosive tracer gas. The infrared imaging device includes a cooled detector, and a filter with a spectral response between about 3 μm and about 5 μm. The detector and/or the filter is cooled to between about −80° C. and about −200° C. The gas leak will be indicated on the notification device. The generator may hydrogen cooled, and on-line or on-grid. | 10-15-2015 |
20150308916 | Leak Detector - A leak detector including a test chamber for accommodating a test object and a test gas sensor connected to the test chamber for detecting test gas escaping from the test object. The test gas sensor is arranged together with the gas-carrying components in a container through which fresh air flows, wherein any test gas penetrating the container is carried off into the surroundings. | 10-29-2015 |
20150308918 | LEAK TESTING METHOD - Provided is a leak testing method of a workpiece including spaces which are three partitioned void portions, the leak testing method being capable of separately learning an amount of leakage from each of the spaces, and precisely determining whether the workpiece is normal or defective. The leak testing method includes steps of obtaining total leakage amounts, and a step of calculating, based on the obtained total leakage amounts, a first leakage amount, a second leakage amount, a third leakage amount, a fourth leakage amount, a fifth leakage amount and a sixth leakage amount which are amounts of leakage from respective routes when gas is injected to a workpiece at a predetermined pressure. | 10-29-2015 |
20150316439 | HYDROGEN LEAKAGE DETECTOR - A hydrogen leakage detector includes a sensor and a microcontroller. The sensor is sensitive to a concentration of hydrogen in air. A sensitive unit of the sensor is exposed directly to an in situ concentration of the hydrogen. The microcontroller is programmed to generate and output an analog signal corresponding to concentration information, based on a concentration measurement from the sensor, and to generate and output an analog signal indicating a correct operation of the detector. | 11-05-2015 |
20150316440 | METHOD AND APPARATUS FOR DETECTING RAPID BARRIER COATING INTEGRITY CHARACTERISTICS - An apparatus and methods for testing the integrity of a barrier coating on a vessel. An off gas test fixture includes a face seal positioned about an opening of the vessel. A side seal is positioned about a portion of the vessel's wall and separated from the face seal by a space. Additionally, a cover may be secured to the fixture that encompasses an interface portion of the fixture and the vessel. Before and/or during testing, gas in the space between the side and face seals may be evacuated, as well as gas present in an interior area of the vessel. The vessel may be exposed to test gas(es) that is soluble by the plastic material of the vessel before and/or after being secured to the fixture. During testing, test gas(es) desorbed by the vessel may be evacuated, with the molecular flow being measured using a mass extraction unit. | 11-05-2015 |
20150330862 | APPARATUS AND METHOD FOR DIESEL ENGINE CHECK TOOL - A method for detecting leaks in a diesel engine is disclosed. The method includes connecting a nozzle of a leak testing device to a threaded inlet of the engine. The threaded inlet is in fluid communication with a high pressure oil cavity of the engine. A hose in fluid communication with the nozzle is connected to a pressurized air source to pressurize the engine with pressurized air from the pressurized air source. With the engine pressurized, a technician listens for an audible sound identifying the pressurized air leaking from the engine. A location of the leaking is then identified based on the audible sound from the engine. | 11-19-2015 |
20150346049 | Quantitative Leak Detection System and Method - A leak detection system includes a test equipment assembly connected to a leak detection assembly, which is connected to a data analyzer. The test equipment assembly includes a tubular section, and the test equipment assembly is configured to pressurize the tubular section during a pressure test. The leak detection assembly is configured to detect information related to the tubular section during the pressure test of the tubular section. The data analyzer is configured to process the information detected by the leak detection assembly, and the data analyzer is further configured to produce a leak rate of the tubular section. | 12-03-2015 |
20150354510 | ON-BOARD METHOD TO SMOKE TEST A VEHICLE'S EVAP SYSTEM USING EXHAUST GAS - Systems and methods for smoke testing an evaporative emissions control system of a vehicle using exhaust gas are disclosed. In one example, a method for an engine comprises: during a first condition, routing exhaust gas to a sealed fuel system; and pressurizing the fuel system with the exhaust gas such that exhaust gas will escape from a leak in the fuel system. In this way, the location and the size of an evap system leak may be determined without the need for, and without using, expensive off-board testing equipment. | 12-10-2015 |
20150355047 | AUTOMATIC PRESSURE-ADJUSTING LEAK DETECTING APPARATUS AND METHOD - A leak detecting apparatus and method by which a regulated supply of gas is delivered from an adjustable pressure regulator to a smoke generator so that smoke generated within the smoke generator and carried to a fluid system being tested for leaks is at optimal density throughout the pressure range. The leak detecting apparatus and method have particular application for testing high pressure operating systems (e.g., the engine of a turbo-charged motor vehicle). A flow transducer measures the rate at which the regulated supply of gas flows to the smoke generator. First and second pressure transducers measure the pressure of the regulated gas and the pressure of the system being tested for leaks. The system under test is visually inspected for leaks after the pressure regulator is adjusted to a pressure to create an optimal maximum flow rate and the pressures measured by the first and second pressure transducers are equalized. | 12-10-2015 |
20150362400 | DEVICE AND METHOD FOR DIFFERENTIATING A GAS IN A SAMPLE - A device is provided for testing a sample via a gas stream, including: an opening; structure for generating a device gas stream along at least one flow path passing through the opening; at least one pressure sensor, each pressure sensor being arranged to measure a pressure of the gas stream along at least one flow path; and a mass flowmeter arranged to measure a parameter representative of the mass flow of the gas stream along the flow path. The device is arranged to quantify the presence of a gas of interest within a gas being analyzed and/or to determine the size of a leak hole from a measurement of the parameter representative of the mass flow. A method is also provided that is implemented by such a device. The method can be used to test the integrity of food packaging, and for detecting leaks or problems related to sealing containers. | 12-17-2015 |
20160003703 | METHOD FOR TESTING LED EXPLOSION-PROOF LAMP CHAMBER AND STRUCTURE THEREOF - A method for testing an LED explosion-proof lamp chamber and a structure thereof aim to be used on a LED explosion-proof lamp. The LED explosion-proof lamp includes a shell and a lighting unit connected to the shell. The shell includes at least one chamber, at least one test portion located at one side of the shell and a sealing assembly connected to the test portion. The test portion includes a test aperture which is sealed by the sealing assembly by screwing and communicates with chamber. The test aperture includes a first thread section and a second thread section connected to the first thread section. The sealing assembly includes a sealing ring, a fastener run through the sealing ring and screwed with the first thread section, and a mask member to cover the fastener and screw with the second thread section. Thus, through a test device and the sealing assembly the sealing efficacy or airtightness of the LED explosion-proof lamp can be secured. | 01-07-2016 |
20160011071 | METHODS AND SYSTEMS FOR DETECTING DEFECTS IN A FUEL CELL STACK | 01-14-2016 |
20160033353 | METHOD OF AUTOMATICALLY INSPECTING INTERNAL GAS LEAK AND METHOD OF MANUFACTURING LED CHIP - A method of inspecting an internal gas leak in a gas line includes providing an internal gas leak inspection device including a main valve and a pressure gauge in a main line between a first valve and a second valve in the gas line, forming an airtight space in the main line by shielding the main valve and the second valve, measuring a pressure variation of the airtight space using the pressure gauge, and determining whether or not the gas leak occurs, based on the measured pressure variation. | 02-04-2016 |
20160084732 | DETECTION DEVICE AND DETECTION METHOD - The present invention discloses a detection device and a detection method, wherein the detection device includes a seal chamber, a gas flow output unit and a gas flow detection unit, a substrate to be detected is horizontally placed in the seal chamber, the gas flow output unit is located in the seal chamber and below the substrate, the gas flow output unit is connected with the seal chamber, the gas flow output unit is used for outputting detection gas flow to the upper surface of the substrate, and the gas flow detection unit is used for detecting whether leak gas flow exists on the lower surface of the substrate. The leak gas flow exists on the lower surface of the substrate is detected by the gas flow detection unit, and whether the substrate is damaged is judged based on a detection result of the gas flow detection unit. | 03-24-2016 |
20160091386 | Sniffing Leak Detector Having a Nanoporous Membrane - A sniffing leak detector for sucking in and analyzing gas, including a sniffing probe for sucking in the gas, a gas-conveying pump connected to the sniffing probe, and a mass spectrometer connected to a vacuum pump for analyzing the sucked-in gas in a high vacuum. The gas flow through the sniffing probe is conducted along a membrane having gas-permeable pores. The membrane allows part of the gas to flow into the prevacuum of the vacuum pump for the mass spectrometric analysis of the gas in a high vacuum. The diameter of the pores is less than or equal to the free path of air at atmospheric pressure and room temperature in order to improve the detection limit of the sniffing leak detector. | 03-31-2016 |
20160103036 | METHOD FOR INSPECTING SEALABILITY OF VACUUM CHAMBER - The present invention discloses a method for inspecting sealability of a vacuum chamber. The vacuum chamber has a closed site in which two sealing rings are arranged in such a way that the two sealing rings form therebetween a sealed compartment. The sealed compartment has a wall in which an evacuation hole is formed. The method for inspecting sealability of a vacuum chamber includes: connecting an evacuation valve through a pipe to the evacuation hole to form evacuation piping; mounting a pressure meter to the evacuation piping; opening the evacuation valve to proceed with evacuation of the sealed compartment and, during the evacuation process, monitoring the pressure meter; and determining sealability of the two sealing rings according to a reading of the pressure meter. The present invention allows for quick evacuation of the sealed compartment and to determine the sealability of the two sealing rings according to the pressure meter. | 04-14-2016 |
20160109320 | METHOD FOR SELECTIVE PIN-POINTING OF UTILITY GAS LEAKS - A method for detecting the location of a gas leak | 04-21-2016 |
20160109321 | ADSORPTION CHARACTERISTIC MEASURING APPARATUS - An adsorption characteristic measuring apparatus is configured to: acquire a unit-time leak pressure value from a pressure increase value of an internal pressure value of a sample tube caused by an non-adsorption gas leaking from the outside of a fitting portion into an inner space of the sample tube; acquire a pressure value at which a temporal change of the internal pressure value of the sample tube assumes an equilibrium state when an adsorption gas present in the reference volume portion is supplied into the sample tube and the sample tube is in a closed state; calculate a pressure value after correction of a real leak pressure value is performed on a measured equilibrium pressure value, as a true equilibrium pressure value, the real leak pressure value being obtained in such a manner that the unit-time leak pressure value is multiplied by a leak time; and calculate an adsorption isotherm. | 04-21-2016 |
20160116364 | Leak Test Apparatus and Method - A leak test apparatus for leak testing a tank including a gas supply system configured to provide to the tank a leak detection gas mixture including hydrogen, a test chamber having a cavity for sealably enclosing the tank such that dead space exists outside the tank and within the cavity, and a gas conduit configured to interconnect the gas supply system and the tank, a control system including a controller programmed to pressurize the tank with the leak detection mixture by flowing gas from the gas supply system through the gas conduit, and a leak detector to determine the presence or absence of a leak in the tank by measuring a concentration of hydrogen in the dead space. | 04-28-2016 |
20160116365 | LEAK TEST ARRANGEMENT AND LEAK TEST METHOD - A leak test arrangement ( | 04-28-2016 |
20160178472 | Leak Testing Apparatus and Method | 06-23-2016 |
20160202138 | Self-Cleaning Particle Filter in a Sniffer Probe | 07-14-2016 |
20160254553 | ELECTRODE PLATE AND METHODS FOR MANUFACTURING AND TESTING AN ELECTRODE PLATE | 09-01-2016 |
20160377502 | SYSTEM FOR DETECTING COOLANT LEAKS IN GENERATORS - A system for detecting a gas leak in a generator includes a source of carbon dioxide gas, and a subsystem for introducing the carbon dioxide gas into the generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the generator and the carbon dioxide gas. The infrared imaging device is a cooled detector and a filter with a spectral response between about 3 μm and about 5 μm. At least one of the detector and the filter is cooled to between about −80° C. and about −200° C. The gas leak will be indicated on the notification device. | 12-29-2016 |