Abstract: The present invention discloses an airtight test apparatus and an airtight test method using the same for testing an airtight property of a case assembled with a plurality of additional members thereon in which the case has through holes corresponding to the additional members. The airtight test apparatus comprises a base, a top plate and a plurality of sealing members selectively and detachably disposed on the top plate. The top plate is capable of moving towards the base to allow the sealing members to correspondingly seal the through holes. During test, the case is placed on the base to form a gas chamber, an air-extracting is performed for the gas chamber and an air pressure is detected. When the detected air pressure is larger than a predetermined value, the sealing members can be selectively utilized to seal the corresponding through holes for determining which through holes have poor airtight property.

Abstract: A device for detecting leaks or weaknesses in a flexible package. The device includes a first member having a non-conductive surface, a second member secured in a position adjacent the first member, and a control system. The second member has an electrically conductive first portion and an electrically conductive second portion. The electrically conductive first portion of the second member is normally electrically insulated from the electrically conductive second portion of the second member. The control system is arranged to detect an electrical current between the electrically conductive first portion and the electrically conductive second portion. The second member may be positioned relative the first member to compress a flexible package between the first member and the second member.

Abstract: A protocol for testing the integrity of a double-walled underground storage tank.

Abstract: A method for testing the hermetic sealing of packages, comprising subjecting the package to two or more moderate depressurization cycles in order to cause stress to the package followed by a final depressurization step at a high negative pressure in order to reveal possible failures and air leaks.

Abstract: Described is a method for checking syringe bodies of the type comprising a hollow body, a seal for closing the hollow body and a dose of a liquid product enclosed by the hollow body and by the seal, the method comprising the steps of applying a pneumatic negative pressure to the syringe body and moving a stop body towards the syringe body in such a way that, during at least a part of the step of applying the pneumatic negative pressure, the stop body obstructs withdrawal of the seal towards a rear end of the syringe body opposite the liquid.

Abstract: A detecting device is used for detecting a battery leak, a positive terminal of the battery is electrically connected to a first contact, a negative terminal of the battery is electrically connected to a second contact. The detecting device includes a first conductor, a second conductor electrically connected to the second contact, and a warning unit electrically connected between the first contact and the first conductor. The second conductor being electrically connected to the first conductor through electrolyte leaked out of the battery, thus the warning unit will be actuated to produce a warning signal.

Abstract: An off-board vehicle fuel containment tester that utilizes a vacuum/pressure pump to change the pressure in the vehicle's fuel handling and containment system. A microprocessor is programmed to control the vacuum/pressure pump system and through the reading produced by a pressure transducer will determine, by the pressure changes occurring in the containment system, if a leak is present and the size of the leak. Once a leak is determined to be present, a gas analyzer that can detect carbon monoxide and hydrocarbons is used to find the point of leakage in the vehicle containment system.

Abstract: The electronic device is provided with an automatic leak detection means, notably for a gas leak, in the case of the device. The automatic leak detection means includes a pressure sensor, a temperature sensor and a calculation unit connected to the pressure sensor and to the temperature sensor. The calculation unit, which is a microcontroller, the pressure sensor and the temperature sensor are arranged inside the case. In operation, the microcontroller checks, based on measurements performed by the pressure sensor and the temperature sensor over time, whether the variation in pressure in the case is within a defined margin proportional to the variation in temperature to determine whether or not the case has a sufficient degree of sealing.

Abstract: The electronic device (1) is provided with an automatic leak detection means, notably for a gas leak, in the case (2) of the device. The automatic leak detection means includes an internal pressure sensor (3), an external pressure sensor (4) and a calculation unit (5) connected to the internal pressure sensor and to the external pressure sensor. The calculation unit, which is a microcontroller, and the internal pressure sensor are arranged inside the case, whereas the external pressure sensor is arranged on an external surface of the case. The microcontroller (5) checks, based on measurements performed by the pressure sensors over time, whether the pressure variation inside the case is different from the pressure variation outside the case to determine whether or not the case has a sufficient degree of sealing.

Abstract: A test apparatus is provided for detecting a gas leakage from at least a rechargeable battery, the test apparatus includes a stainless steel vacuum chamber storing the rechargeable battery and full of the low temperature gases, a first pump coupled to the stainless steel vacuum chamber and sucking the low temperature gases in the stainless steel vacuum chamber so the pressure inside is decreased to a first pressure, a second pump coupled to the stainless steel vacuum chamber, wherein after the pressure inside the stainless steel vacuum chamber is decreased to the first pressure, the second pump sucks the low temperature gas in the stainless steel vacuum chamber so the pressure inside is decreased from the first pressure to a second pressure, and a test device coupled to the second pump and tests the gas leaked from the rechargeable battery among the low temperature gas.

Abstract: A pressure-resistant-container gas leakage detecting device for a vehicle, to which a discharge tube casing is attached, includes: a casing having a first casing member and a second casing member coupled to the first casing member to form an internal space; a pressure-resistant container having a body coupled to the interior of the casing and a discharge tube exposed to the outside of the casing, the discharge tube adapted to introduce gas thereinto and to discharge gas therefrom; the discharge tube casing adapted to cover the discharge tube; a first gas leakage detecting sensor attached to the discharge tube casing; corrosion-preventing gas injected between the pressure-resistant container and the casing to be filled thereinto higher or lower than atmospheric pressure; and a gas pressure detecting sensor coupled to the casing to detect the occurrence of the change in the pressure of the corrosion-preventing gas.

Abstract: 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.

Abstract: A tire information monitoring system includes a transmission device, a receiving device, and a monitoring section. The transmission device includes a sensor which detects tire information, a transmitter which wirelessly transmits the detected tire information and a housing. The housing includes a wall surrounding the sensor and the transmitter, an inner space divided from the tire cavity area by the wall, and an air vent passing through the housing and connecting the inner space and the tire cavity area. An outer opening portion of the air vent formed on a surface of the housing facing the tire cavity area has an opening area of 0.4 mm2 or smaller. An inner opening portion of the air vent formed on a surface of the housing facing the inner space has an opening area larger than that of the outer opening portion.

Abstract: A sensor module includes an enclosure adapted to hermetically seal an opening or a hole on the outer surface of a casing or packaging, a sensor element and a membrane. The membrane is arranged between the enclosure and the opening or hole of the casing or packaging.

Abstract: A method for testing the tightness of a housing involves providing a pressure sensor in a housing, sealing the housing, and detecting a pressure level in the housing.

Abstract: 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 first 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.

Abstract: Provided is a pinhole inspecting method for suitably inspecting a pinhole in a bottle compared with conventional pinhole inspection. A reference inner pressure (P1) is a bottle inner pressure obtained directly after closing a supply valve (3) after opening the supply valve (3) for only a predetermined time. Whether the reference inner pressure (P1) is over a previously specified first threshold value (Pth1) or not is checked, and when it exceeds the first threshold value (Pth1), airtight status of the bottle is held for a predetermined time, and then a pressure reduction quantity (?P) of the bottle inner pressure from the reference inner pressure is measured after a fixed time. The bottle is judged to have no pinholes only when the value of ?P is not exceeding the previously specified second threshold value (?Pth2).

Abstract: 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.

Abstract: 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.

Abstract: A water leakage checking apparatus includes: a plurality of attachment portions for attaching an endoscope; a water leakage sensing portion that communicates with the plurality of attachment portions and simultaneously carries out a plurality of items of a water leakage check menu; and an endoscope information reading portion that reads endoscope information from the endoscope. Also, the water leakage checking apparatus includes: a control portion that determines an item of the water leakage check menu based on the read endoscope information, assigns the determined item of the water leakage check menu to one of the plurality of attachment portions, and outputs attachment portion identifying information for identifying the assigned one of the attachment portions; and a notifying portion that notifies the attachment portion identifying information outputted from the control portion.

Abstract: A leak detection method for an air bed having an air chamber comprises adjusting the air chamber to a predetermined pressure level, sensing a first pressure value of the air chamber after a first time interval, sensing a second pressure value of the air chamber after a second time interval, determining a pressure change in the air chamber, detecting whether the air chamber is leaking by comparing the pressure change with a second pressure value, and displaying a leak detection indicator. In one embodiment, the second pressure value is a pressure change in a second air chamber. In another embodiment, the second pressure value is an expected pressure change of the air chamber that is calculated based upon changes in ambient temperature and barometric pressure.

Abstract: A material for use in vacuum bagging a component. The material includes a compound sensitive to moisture, such that an exposure of the compound to moisture or wetting causes a physical and/or chemical change in the compound that is visually detectable in the cover material. A method of leak detection during vacuum bagging involves the steps of: arranging a component in a vacuum bagging assembly, such as to form a fibre-reinforced plastic component; arranging a material according to the invention in the vacuum bagging assembly such that the compound sensitive to wetting or moisture is under, or on an inner side of, a sealing film or vacuum bag of the assembly; applying a vacuum to the vacuum bagging assembly to evacuate a space containing the component and sealed by the sealing film or vacuum bag; and wetting an outer surface of the sealing film or vacuum bag.

Abstract: The invention relates to a method and an arrangement for detecting a leak in a sealed package containing a product in the form of a foodstuff or a pharmaceutical. The leak detecting arrangement comprises a testing station, in which a package is placed by the transporting means and a pressure applying means arranged to apply a predetermined amount of pressure on the package located in the testing station. The arrangement further comprises a continuously operated suction means arranged to draw ambient air past a seal on the packet to be tested and a gas sensor located in the flow of ambient air drawn off by the suction means and arranged to transmit a signal dependent on the test gas concentration detected in the ambient air.

Abstract: An apparatus for measuring the degree of vacuum of a multistage vacuum heat-insulating member and to a measurement method using the same includes a chamber in which a plurality of vacuum heat-insulating members are accommodated and which forms a sealed space; a shelf arranged within the chamber so as to support the plurality of vacuum heat-insulating members in a plurality of layers; a displacement sensor for sensing the displacement of each outer shell of the vacuum heat-insulating members stacked on the shelf; and a vacuum unit connected to the chamber so as to regulate the pressure of the internal space of the chamber.

Abstract: Container inspection utilizing a linear actuator. A linear actuator shaft is movable such that the shaft end temporarily contacts the container. A feedback parameter resulting from or related to a change of an electrical property of the linear actuator, is detected or determined by a controller, which determines whether the container satisfies pre-determined inspection criteria, e.g., whether the container is properly sealed, satisfies pressure criteria and/or has unacceptable vacuum. These determinations are made based at least in part upon one or more detected feedback parameters including or related to at least one of a change of position of the shaft, a change of velocity of the shaft and a force or torque exerted by the container to the shaft. In this manner, high speed leak detection is performed without a load cell or force transducer, without squeezing or compressing bottles and without determining fill level changes.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: A case packer is adapted to convey a plurality of packages and to pack the plurality of conveyed packages in a box. The case packer includes a first conveying unit, a detector, a second conveying unit and a control unit. The first conveying unit is configured and arranged to convey the packages. The detector is configured and arranged to detect a thickness of at least one of the packages. The second conveying unit includes an accumulating portion where the packages are accumulated with the packages being partially overlaid on one another. The second conveying unit is configured and arranged to convey the packages overlaid in the accumulating portion. The control unit is configured to adjust operation of the second conveying unit based on a detected value from the detector.

Abstract: Air leaks in a vacuum bag are detected using a leak detection film covering the inside face of the bag. The film includes a gas permeable binder carrying oxygen sensitive material that changes in physical appearance at the location of an air leak. The film may be adhered to the inside face of the bag or may form a separate membrane that is placed over a layup being molded in the bag. The film may be illuminated with light having a wavelength selected to cause the film to luminesce.

Abstract: A package testing system or apparatus that may be mounted directly onto an F/F/S machine and allows for communication with an F/F/S machine in the form of either a digital or analog signal. The communication may be implemented into a PID loop which allows for a predetermined burst pressure set point to be reached “automatically” by either the burst pressure controller or the F/F/S controller to automatically adjust the sealing parameters via the PID loop. The system may employ a novel sealing system that uses either a viscous solution or a series of laminated materials to seal either the needle entry point or the puncture side of the material in its entirety, thereby eliminating the use of known sealing patches that cover the porous webbing in testing. Methods for conducting such testing and for operating such systems are within the scope of the present disclosure.

Abstract: The leak detection appliance has a test inlet to which a test chamber containing the test specimen can be connected. A high-vacuum pump produces a high vacuum in a test gas detector. A preliminary vacuum pump contains two pump stages. In order to evacuate the test chamber, the pump stages are operated in parallel mode, with their suction capabilities being added. When the necessary vacuum has been achieved, the pump stages are operated in series in order to produce the necessary high vacuum—which is required for high detection sensitivity—on the test gas detector.

Abstract: Systems, methods, and apparatus are provided for detecting improperly sealed portions of sealed packages. For example, in one embodiment, a package leak detection system automatically provides pressure within a tank for a predetermined period of time. The tank is at least partially filled with colored fluid with a sealed package being at least partially submerged in the colored fluid. In the tank, the pressure inside the tank forces the colored fluid into improperly sealed portions of the sealed package. After the predetermined period of time has elapsed, the package leak detection system automatically shuts off the package leak detection system and releases the pressure within the tank so the sealed package can be inspected for potential leaks.

Abstract: A sealed battery includes a sealing plate 13 sealing a mouth of an outer can, an external terminal 16 attached to the sealing plate 13 and having a connecting terminal 23, and a current interruption mechanism 18 interrupting current in response to pressure increase in the outer can that is installed in a conductive pathway electrically connecting the connecting terminal 23 and an electrode assembly. In the connecting terminal 23, a through-hole 23b continuing to the space on the current interruption mechanism 18 at the side corresponding to the outside of the battery is formed. The through-hole 23b is sealed with a terminal stopper 30 made of an elastic member so as to form a closed space between the terminal stopper 30 and current interruption mechanism 18. An electrolyte or washing solution hardly enters the current interruption mechanism during the manufacture can be provided.

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapor pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Abstract: The present invention is a hermetic seal leak detection apparatus, which can be used to test for hermetic seal leaks in instruments and containers. A vacuum tight chamber is created around the unit being tested to minimize gas space outside of the hermetic seal. A vacuum inducing device is then used to increase the gas chamber volume inside the device, so that a slight vacuum is pulled on the unit being tested. The pressure in the unit being tested will stabilize. If the stabilized pressure reads close to a known good seal calibration, there is not a leak in the seal. If the stabilized pressure reads closer to a known bad seal calibration value, there is a leak in the seal. The speed of the plunger can be varied and by evaluating the resulting pressure change rates and final values, the leak rate/size can be accurately calculated.

Abstract: Apparatuses for evaluating the integrity of a container seal and methods of using same are provided. The apparatuses include a sealed container having a conductive fluid and a first probe therein, a conductive solution bath having a second probe therein, a conductivity meter and a pressurized fluid supply. A pressurized fluid is supplied from fluid supply to an interior of the sealed container through the first probe until the seal on sealed container ruptures, first and second probes create an electrical circuit, and the conductivity meter detects a flow of electrons between the two probes. In this manner, apparatuses of the present disclosure are able to quantify the amount of internal pressure in the container at the time the container seal ruptures.

Abstract: A device for detecting an air leak in a tool comprises a vacuum bag and a leak detection film disposed along an inside face of the vacuum bag. The leak detection film may include oxygen sensitive material configured to change physical appearance at a location of an air leak in the tool. A breather layer may be interposed between the tool and the leak detection film for facilitating air flow therebetween.

Abstract: A system for cover screw float detection. The system includes a drive cradle coupled to a structure. The system also includes a moveable portion coupled to the structure. The system further includes a sensor coupled to said structure. The system additionally includes another sensor coupled to the moveable portion. Spatial separation between the another sensor and the sensor when the moveable portion is oriented in a screw float check position indicates presence of cover screw float in a disk drive disposed in the drive cradle.

Abstract: A vehicle includes a sealed fuel system and a controller. The fuel system includes a fuel tank, a fuel cap, a control orifice, and an absolute pressure sensor. The controller associates a threshold large leak in the fuel system with a fuel cap sealing error. The controller detects completion of a prior refueling event, compares measurements from the pressure sensor to a reference vacuum across the control orifice to determine the presence of the threshold large leak, and sets a diagnostic code corresponding to the large leak only upon completion of the prior refueling event. A method for detecting the large leak includes detecting completion of the refueling event, comparing vacuum measurements from the absolute pressure sensor to a reference vacuum across the orifice to determine the presence of the large leak, and setting a diagnostic code corresponding to the large leak only upon completion of the prior refueling event.

Abstract: A reconfigurable leak testing system includes a leak testing station, an off-shuttle disposed adjacent to the leak testing station, and a fixture cartridge that is translatable between the off-shuttle and the leak testing station. The fixture cartridge is configured to selectively couple with the leak testing station and includes an upper fixture, a lower fixture, and a plurality of actuatable testing features. The fixture cartridge is configured to receive a part between the upper fixture and lower fixture, and the plurality of actuatable testing features are configured to contact the received part to create a closed volume adjacent the part, wherein the closed volume may be pressurized via a pressurized fluid, and examined for leaks.

Abstract: A reconfigurable leak testing system is provided that includes a leak testing station and at least one off-shuttle cart removably attachable to the leak testing station. A fixture cartridge is translatable between the off-shuttle cart and the leak testing station. The fixture cartridge is configured to selectively couple with the leak testing station. The fixture cartridge includes an upper fixture, a lower fixture, and an actuatable testing feature. The fixture cartridge is configured to receive a part between the upper fixture and lower fixture. The actuatable testing feature is configured to contact the part. A closed volume is defined at least partially by the actuatable testing feature and the part.

Abstract: A leak detection method for an air bed having an air chamber comprises adjusting the air chamber to a predetermined pressure level, sensing a first pressure value of the air chamber after a first time interval, sensing a second pressure value of the air chamber after a second time interval, determining a pressure change in the air chamber, detecting whether the air chamber is leaking by comparing the pressure change with a second pressure value, and displaying a leak detection indicator. In one embodiment, the second pressure value is a pressure change in a second air chamber. In another embodiment, the second pressure value is an expected pressure change of the air chamber that is calculated based upon changes in ambient temperature and barometric pressure.

Abstract: A method for checking the condition of containers (2) comprising a hollow body (5) for containing a semi-liquid or semi-solid product and a membrane (6) for closing the hollow body (5) comprises the steps of: closing the container (2) inside a test head (4) comprising a housing (10) to hold the container (2) and a cap (11) hermetically sealing the container (2) and defining an empty internal space (15); pressurizing the space (15) inside the cap (11) by introduction of pressurized air inside the space (15), for a defined period of time (Ta); releasing the pressurized air from the space (15); measuring the movement of the membrane (6) due to the pressurization of the space (15), by means of a position sensor (14); depressurizing the space (15); measuring the movement of the membrane (6) due to the depressurization of the space (15), using the position sensor (14).

Abstract: A method and system are disclosed for determining whether a leak is present in an evaporative emission control system 10 for on-board diagnostic purposes. The method comprises predicting for a leak of predetermined size the time period required for the vacuum to fall from a predicted starting vacuum to a predetermined level of vacuum at which the state of a switch changes, checking at the end of the time period the state of the switch and using the state of the switch as an indication of whether a leak greater than the predetermined size is present in the evaporative emission control system.

Abstract: A microchip system has a package forming a hermetically sealed interior, and MEMS structure within the interior. The system also has a gas sensor for detecting the concentration of at least one of oxygen or hydrogen within the interior.

Abstract: 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.

Abstract: Object To provide a method of testing air tightness of a sealed lash adjuster having a body and a plunger in the course of assembling the lash adjuster to confirm the sealability of a first and a second seal member respectively installed on the slidable portions of the body and the plunger.

Abstract: In a method for detecting a leak in a double pipe, a medium located in an intermediate chamber between the interior and exterior pipe is moved toward a first end of the pipe, whereupon the medium flows in from the second end. On the first end the medium is examined for any leakage of a characteristic material, upon the detection of which a leakage signal is generated and a location of the leakage is calculated based on the transport time of the characteristic material from the leakage to the first end and on the mass flow of the medium. A corresponding device contains a conveyor unit for moving the medium through the intermediate chamber. A material sensor is disposed at the first end for examining the medium for the characteristic material. A control and analysis unit is provided for generating a leakage signal and calculating the location of the leakage.

Abstract: A system is provided for testing the hermeticity of a package, such as a microelectromechanical systems package containing a sealed gas volume, with a sampling device that has the capability to isolate the package and breach the gas seal connected to a pulse valve that can controllably transmit small volumes down to 2 nanoliters to a gas chamber for analysis using gas chromatography/mass spectroscopy diagnostics.

Abstract: A method and system for detecting liquid leaked from an energy storage structure, e.g., a battery is provided. One embodiment includes a sensor that detects the leaked electrolyte as it leaks through a breach in the wall retaining the electrolyte in the battery. The sensor has a sheet-like layer with a conductive surface and an electrical connection to a first interface. The sensor is positioned substantially flush to the battery wall, so that leaking electrolyte contacts the sensor. If the battery has a case, there is a first external communication point in electrical communication with the first interface. In the absence of leaked electrolyte there is substantially no electrical connection between the first external communication point and either of the terminals as indicated by a very high resistance. When leaked electrolyte is present there is an electrical connection between the first external communication point and either of the terminals.

Abstract: For detected smallest leak in closed containers, which are at least to a part filled with a gas, the container (1) is pressurized by a test gas (g(s)) for an amount of time. The test gas (g(s)) comprises a gas species (s). The amount of the addressed gas species (s) which has penetrated in the container 1 it is sensed (7) as a leak indication.