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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8176770 | 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 ... | 05/15/2012 |
| 8074492 | Method and apparatus for the detection of leaks Disclosed is a method for detecting a leak gas in a flushing device (10), comprising the following steps: the flushing device (10) is disposed on a part (201) that is to be tested; a flushing gas is conducted through the flushing device (10 | 12/13/2011 |
| 7980117 | Sniffer leak 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 sit... | 07/19/2011 |
| 7971471 | Quartz window gas sensor with heated membrane The gas sensor has a selectively permeable membrane which is composed of silicon material and is provided with a heating device on the outside. The membrane closes an evacuated housing which contains a pressure sensor. When evacuating the area surrounding the housin... | 07/05/2011 |
| 7908904 | Method for detecting the hermetic sealing of enclosed areas This method makes it possible, with highest possible precision and without any major expense, to determine the air tightness of an enclosed space. Specifically, it introduces a method which, on demand and in effective yet easy-to-implement fashion, permits at any ti... | 03/22/2011 |
| 7905132 | Leak testing using tracer gas permeable membrane Leak testing using a testing chamber into which a test part may be configured for testing. The test part defines a leak test boundary to be tested. Tracer gas is introduced into a first volume on one side of the leak test boundary. A vacuum (e.g., a rough vacuum) ma... | 03/15/2011 |
| 7886580 | 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 p... | 02/15/2011 |
| 7874201 | 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 o... | 01/25/2011 |
| 7841228 | Method of detecting hydrogen sensor saturation in a hydrogen powered fuel cell In one aspect there is disclosed a method of detecting a hydrogen leak in a fuel cell system that includes the steps of a) providing a hydrogen sensor, b) determining sensor characteristics, c) measuring a hydrogen concentration, d) determining if a hydrogen leak is... | 11/30/2010 |
| 7832255 | Sealed device and leak test method and manufacturing method thereof An inner sealing portion seals a tubular port, which is provided to a receiver that receives water, at a first location of the tubular port. An outer sealing portion seals the tubular port at a second location of the tubular port spaced from the first location on an... | 11/16/2010 |
| 7802465 | Collecting conduit, apparatus and method for leakage monitoring and leakage location A collecting conduit for leakage monitoring and leakage location at an installation, includes a support pipe having openings. An outer surface of the support pipe is covered by a layer being permeable to a substance to be monitored, at least on a segment extending i... | 09/28/2010 |
| 7779675 | Leak indicator comprising a sniffer probe The leak detector includes a basic device which includes a vacuum pump, a test gas sensor, and a hand-held sniffing probe. The sniffing probe is connected with the basic device via a flexible hose line which includes capillary tubes. At least two capillary tubes are... | 08/24/2010 |
| 7739900 | Method for testing the leakage rate of vacuum encapsulated devices The present invention is directed to a method for testing the leakage rate of an encapsulated device comprising the step: bombing the device with a neon and/or argon atmosphere using a bombing pressure of at least more than environmental pressure and measuring the q... | 06/22/2010 |
| 7673497 | System, methods, and compositions for detecting and inhibiting leaks in transmission systems System, methods, and compositions are described for detecting and inhibiting leaks of a transmission system. The composition may include one or more transmission system sealants and one or more light activated compounds. The transmission system sealant(s) inhibit on... | 03/09/2010 |
| 7647818 | Process for testing the tightness of containers A process for testing the tightness of containers includes making available a first fluid in the container interior space that is different from a second fluid surrounding the container, creating a negative pressure in the container interior space, testing the inter... | 01/19/2010 |
| 7640791 | Leak detecting device A leak detecting device includes a carrying device attached to a holder to be fastened to the body of an operator. From the carrying device, a flexible capillary line extends to a sniffing probe, which includes a gas inlet at its front end. The carrying device is co... | 01/05/2010 |
| 7640790 | Method for operating a hydrogen test leak unit For operating a hydrogen test leak unit including a chamber defined by a membrane, a test gas mixture of hydrogen and an added gas is used. The added gas has a permeation coefficient relative to the material of the membrane ranging between 50% and 200% of that of hy... | 01/05/2010 |
| 7587928 | Leak inspection device A leak inspection device comprises: a vacuum chamber 2 for accommodating a product 1; a vacuum pump 3 for discharging air from the vacuum chamber; a He gas bomb 4 for supplying and charging He gas into the product; and a leak detector ... | 09/15/2009 |
| 7565830 | System, methods, and compositions for detecting and inhibiting leaks in engine oil systems System, methods, and compositions are described for detecting and inhibiting leaks of an engine oil system. The composition may include an engine oil system sealant and a light activated compound. The engine oil system sealant(s) inhibit leak(s) in the engine oil sy... | 07/28/2009 |
| 7565829 | System, methods, and compositions for detecting and inhibiting leaks in steering systems System, methods, and compositions are described for detecting and inhibiting leaks of a steering system. The composition may include one or more steering system sealants and one or more light activated compounds. The steering system sealant(s) inhibit one or more le... | 07/28/2009 |
| 7559231 | Leak inspection device In an inspection device in which a leakage of He gas from a product 1 is detected when He gas is pressurized and charged into the product 1 accommodated in a vacuum chamber 2, a variable displacement means, capable of changing the volume of the ... | 07/14/2009 |
| 7552623 | Enhanced leak detection dye carrier A leak detection dye carrier is formed using a two-stage process (53). In a first stage, the dye carrier (52) is saturated with a mixture (54) of a dye powder and an evaporable solvent, such as alcohol. The solvent is permitted to evaporate leav... | 06/30/2009 |
| 7500381 | Systems and methods for trace gas leak detection of large leaks at relatively high test pressures Trace gas leak detectors and methods for trace gas leak detection of large leaks at relatively high test pressures are provided. A trace gas leak detector includes a test port to receive a sample containing a trace gas, the test port connected to a test line, a mass... | 03/10/2009 |
| 7497110 | 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 ga... | 03/03/2009 |
| 7448255 | Very high-temperature fluorescent tracer and automation for boiler water applications A method of fluorometrically monitoring dose control and leak detection, as well as boiler water system programs that occur in industrial systems containing boilers that operate between about 1500 psig and 2600 psig, and at pH from about 7.6 to 11.5. ... | 11/11/2008 |
| 7444854 | Leak indicator with test leak and test leak for integration into a leak detector A leak test apparatus includes a housing having an interior sized for retaining a plurality of instrument components including a control unit. A sniffer gun is linked to the instrument components, the sniffer gun having an intake point, and a test leak includes a ga... | 11/04/2008 |
| 7421886 | Quick connect coupling test apparatus and method The invention is a quick connect coupling apparatus in the form of a test module for use in a robotic work performing application which accomplishes testing of an end effector in an offline location such that the integrity of each pneumatic circuit can be independen... | 09/09/2008 |
| 7410528 | Method and system for testing the integrity of green plugged honeycomb structure A method for testing integrity of a plugged honeycomb structure includes forming a condenser at a first end of the honeycomb structure, passing a vaporous stream into a second end of the honeycomb structure, wherein a column of the vaporous stream emerges at the fir... | 08/12/2008 |
| 7401499 | Apparatus for permeability analysis An apparatus for permeability analysis which transmits a testing fluid to the tubular specimen and measures the volume of the testing fluid permeating through the tubular specimen. The apparatus for permeability analysis has a tubular specimen, a cylindrical frame, ... | 07/22/2008 |
| 7398676 | Leak sensor and leak sensing system A leak sensor and a leak sensing system are provided. The leak sensor preferably includes a fluid sensing member that is capable of sensing and indicating the presence of a fluid leaked from a fluid storage or transport member. The leak sensor further preferably inc... | 07/15/2008 |
| 7383826 | Fuel vapor treatment apparatus, system having the same, method for operating the same A fuel vapor treatment apparatus connects with a fuel tank, which produces fuel vapor to be purged into an intake passage of an internal combustion engine through a purge passage. The fuel vapor treatment apparatus includes a state measuring unit that includes a mea... | 06/10/2008 |
| 7383720 | Method and device for testing for leaks A method and a device for testing whether planar material, in particular films, are leakproof. The planar material is continuously conveyed in a continuous process through a test chamber which has a test gas chamber on one side of the planar material and a measuring... | 06/10/2008 |
| 7360346 | Purging system and purging method for the interior of a portable type hermetically sealed container A fine pressure fluctuation at short time intervals occurring when a portable type hermetically sealed container is purged is reduced to thereby prevent the deterioration or the like of a seal member due to the pressure fluctuation. In order to achieve this object, ... | 04/22/2008 |
| 7353691 | High performance generator stator leak monitoring system A method of measuring hydrogen leakage from a generator core into generator coolant water flowing through the generator stator windings comprising the steps of: providing a core hydrogen gas environment within the generator; flowing coolant water in a flowpath throu... | 04/08/2008 |
| 7350399 | Leakage detecting device for evaporating fuel processing apparatus A leakage detecting device is connected to an evaporating fuel processing apparatus to detect leakage of evaporating fuel in a ventilation apparatus that includes an electric pump, a fuel tank, and a filter. The electric pump includes a pump portion and a motor port... | 04/01/2008 |
| 7348085 | Fuel cell installation A leak in a fuel cell module can allow hydrogen and/or oxygen to escape from the fuel cell module, thereby creating a high risk of fire or explosion. This problem is addressed by providing a fuel cell installation with a fuel cell module that is enclosed in a gas-ti... | 03/25/2008 |
| 7343783 | Portable multi-function system for testing protective devices A multi-function device for testing masks such as NBC masks used in civilian and military applications. In its preferred form, the device is self-contained and can be readily transported to field sites by one or two individuals. The device includes a protective stor... | 03/18/2008 |
| 7336462 | Alternator and starter tester protection apparatus and method An method and apparatus testing an alternator and/or starter assembly including a power source for energizing the alternator and/or starter, a computer processor for monitoring electrical current supplied to energize the alternator and/or starter wherein the compute... | 02/26/2008 |
| 7334490 | Method and apparatus for v-bank filter bed scanning Embodiments of the invention generally related to a method and apparatus foe scanning a v-bank filter. In one embodiment, an apparatus for scanning a v-bank filter includes a hollow body having first and second ends. An outlet, formed at the second end of the body, ... | 02/26/2008 |
| 7331217 | Re-usable main drain testing method and apparatus A removable, convenient main drain testing system is provided through the use of a testing device that includes a cap clampable about a drain pipe, an air pressure gauge, a valve and connection to an air compressor. The assembly can be moved from one jobsite to the ... | 02/19/2008 |
