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1. 发明公开

US20240159616A1 FUNCTIONALLY TESTING A LEAK DETECTION DEVICE FOR CHECKING THE SEALING TIGHTNESS OF AN INSPECTION OBJECT FILLED WITH A LIQUID 审中-公开
公开(公告)号：US20240159616A1
公开(公告)日：2024-05-16
申请号：US18280703
申请日：2022-02-03
申请人： INFICON GMBH
发明人： Heike HILGERS
IPC分类号： G01M3/20 , H01M10/42
CPC分类号： G01M3/205 , H01M10/4228
摘要： A test leak device for functional testing of a leak detection device for the leak test of a test specimen (14) filled with a liquid (12) having an internal pressure that is lower than atmospheric pressure, comprising

a reservoir (102) filled with a test liquid (104), wherein the test liquid (104) has a vapor pressure of less than 500 mbar at room temperature, and the reservoir (102) comprises an outlet (106), and
a pump (100) cooperating with the reservoir (102) and configured to convey the test liquid (104) from the reservoir (102) in such a way that the test liquid (104) escapes from the pump (100) through the outlet (106) in liquid form from the reservoir (102).

2. 发明授权

US11852562B2 Sniffing leak detector with switching valve and buffer chamber 有权
公开(公告)号：US11852562B2
公开(公告)日：2023-12-26
申请号：US17053442
申请日：2019-05-06
申请人： INFICON GmbH
发明人： Daniel Wetzig , Marcel Ruth
IPC分类号： G01M3/04 , G01N1/24 , G01N33/00
CPC分类号： G01M3/04 , G01N1/24 , G01N33/0026
摘要： Sniffing leak detector including a handheld device with a sniffer tip probe including a sample gas inlet, a reference gas inlet, a gas analyzer, and a switching valve adapted to alternatingly connect the sample gas inlet to the gas analyzer and the reference gas inlet to the gas analyzer in a gas conducting manner, such that either the gas drawn through the sample gas inlet or the gas drawn through the reference gas inlet is analyzed by the gas analyzer, characterized in that the reference gas inlet is arranged in a remote distance from the sniffer tip probe and a reference gas conduit connecting the reference gas inlet and the switching valve includes a buffer chamber adapted to homogeneously mix gas drawn into the buffer chamber through the reference gas inlet with the remaining gas in the buffer chamber.

3. 发明申请

US20230021741A1 METHOD FOR ADAPTING THE CONCENTRATION OF A SAMPLE GAS IN A GAS MIXTURE TO BE ANALYSED BY A GAS CHROMATOGRAPH ASSEMBLY, AND CHROMATOGRAPH ASSEMBLY THEREFORE 有权
公开(公告)号：US20230021741A1
公开(公告)日：2023-01-26
申请号：US17788254
申请日：2020-12-09
申请人： INFICON GmbH
发明人： Johann Hellgren , Henrik Vennerberg , Fredrik Enquist
IPC分类号： G01N30/74 , G01N30/38 , G01N30/06
摘要： Method for adapting the concentration of a sample gas in a gas mixture to be analysed by a gas chromatograph assembly (10), the gas chromatograph assembly (10) comprising a sample gas inlet (20) for introducing a sample gas to be analysed, a secondary gas inlet (40), a gas chromatograph infrared sensor (12), a gas chromatograph column (26), and a gas chromatograph bypass (28) parallel to the column (26), characterized by a) introducing an amount of sample gas through the sample gas inlet (20), b) introducing an amount of secondary gas through the secondary gas inlet (40), c) mixing the sample gas and the secondary gas to a gas mixture and conducting the gas mixture via the gas chromatograph bypass (28), d) circulating the gas mixture in a gas conducting loop (52) comprising the gas chromatograph bypass (28), the gas chromatograph infrared sensor (12) and not comprising the gas chromatograph column (26), e) analysing the gas mixture thus obtained by means of gas chromatography employing the gas chromatograph column (26) and the gas chromatograph infrared sensor (12).

4. 发明申请

US20220181709A1 TIGHTNESS TEST OF A LIQUID FILLED TEST OBJECT 有权
公开(公告)号：US20220181709A1
公开(公告)日：2022-06-09
申请号：US17436986
申请日：2020-07-22
申请人： INFICON GmbH
发明人： Maximilian Reismann , Daniel Wetzig
IPC分类号： H01M10/42 , G01M3/20 , H01M10/0525
摘要： A method for a tightness test of a test object filled with a liquid, said test object having an internal pressure which is lower than atmospheric pressure, comprising the following steps: inserting the test object into a test chamber, evacuating the test chamber to a pressure which is lower than the internal pressure inside the test object, drawing off the test chamber residual gas components together with gas components desorbing from a wall of the test chamber and parts of the liquid escaping from the test object through a leak in the latter without any carrier gas being fed to the test chamber from outside, transporting the drawn-off residual gas components together with the parts of the liquid escaped from the test object to a detector, and detecting parts of the liquid escaped through a leak in the test object by means of a detector.

5. 发明授权

US11262296B2 Connecting device for connecting a gas sensor 有权
公开(公告)号：US11262296B2
公开(公告)日：2022-03-01
申请号：US16972076
申请日：2019-06-04
申请人： INFICON GmbH
发明人： Sebastian Weiss
IPC分类号： G01N21/00 , G01N21/3504 , G01M3/38 , G01M3/00
摘要： Disclosed is a connecting device for connecting a gas sensor to a gas leak detector. The gas sensor includes an elongate sensor housing. The gas leak detector includes at least one gas connector adapted to be connected to the gas sensor. A guide rail connects to the gas leak detector, engaging with the sensor housing such that the gas connectors engage with at least one complementary second gas connector. A fastening claw includes two elastic spring legs arranged at one of the sensor housing and the gas leak detector. Each of the two spring legs includes a latching boss engaging the frontal end of the gas sensor opposite the second gas connector and a spreading element having two retaining arms. Each retaining arm includes a pulling edge, an inclined insertion portion along which the latching boss grips and pivots the spring leg, and an inclined disengagement portion.

6. 发明授权

US11199467B2 Device and method for distinguishing a test gas escaping from a leak from interfering gas 有权
公开(公告)号：US11199467B2
公开(公告)日：2021-12-14
申请号：US16651021
申请日：2018-09-28
申请人： INFICON GmbH
发明人： Daniel Wetzig
IPC分类号： G01M3/22 , G01M3/20
摘要： A method for distinguishing a test gas escaping from a leak in a test object (21) from an interfering gas in the environment of the test object (21) during sniffing leak detection, having the steps: suctioning gas from the environment of the test object (21) in the region of the outer surface of the test object by means of a sniffing tip, which has a suction opening (14), which is connected, for gas conduction, to a sensor (18), which is designed to determine the test gas partial pressure of the test gas in the suctioned gas flow; varying, with periodic repetition, the flow intensity of the suctioned gas flow; setting a total pressure of the suctioned gas at the sensor (18) of at least 80 percent of the total pressure of the gas in the atmosphere (23) surrounding the test object (21); avoiding fluctuations of the total pressure of the suctioned gas at the sensor (18) of more than 10 percent; measuring the test gas partial pressure of test gas contained in the suctioned gas flow by means of the sensor (18); indicating that the test object (21) has a leak if the measured test gas partial pressure has a varying component, the average amplitude of which lies above a threshold value and which follows the variation of the suctioned gas flow.

7. 发明授权

US11009030B2 Mass-spectrometric leak detector with turbomolecular pump and booster pump on a common shaft 有权
公开(公告)号：US11009030B2
公开(公告)日：2021-05-18
申请号：US16308521
申请日：2017-06-13
申请人： INFICON GmbH
发明人： Werner Grosse Bley , Thomas Böhm , Hjalmar Bruhns
IPC分类号： F04B19/04 , G01M3/20 , F04D19/04 , F04D29/10 , F04D25/16
摘要： Disclosed is a mass-spectrometry leak detector including a multi-stage turbomolecular pump, a mass spectrometer connected to the suction side of the turbomolecular pump, a preliminary vacuum pump connected to the pressure side of the turbomolecular pump, and a booster pump stage. The suction side of the booster pump stage has a connection for a test object and the pressure side is connected to the pressure side of the turbomolecular pump and to the suction side of the preliminary vacuum pump by means of a gas line path. The stages of the turbomolecular pump and the booster pump stage are arranged on a common shaft and have a common drive and the gas line path is interrupted, by means of a separation, between the pressure side of the booster pump stage and the suction side of the pump stage of the turbomolecular pump connected to the mass spectrometer.

8. 发明授权

US10852212B2 Leak detection on a flexible test piece in a film chamber 有权
公开(公告)号：US10852212B2
公开(公告)日：2020-12-01
申请号：US16072308
申请日：2017-01-30
申请人： INFICON GmbH
发明人： Daniel Wetzig , Silvio Decker , Jochen Puchalla-König
IPC分类号： G01M3/32 , G01M3/36 , G01M3/38
摘要： The invention relates to a method for leakage detection on at least one flexible test piece in a film chamber, including inserting the at least one test piece into a film chamber, lowering the pressure in the film chamber outside the at least one test piece, and detecting a leakage in the at least one test piece by observing the spatial change of the film of the film chamber. The outer contour of the at least one test piece is transferred to at least one section of the film by the lowering of the pressure in the film chamber. The contour of the film is recorded with an image recording system, and the recorded images of the contour are compared with reference images of said contour in the event of a tight test piece.

9. 发明授权

US10514317B2 Gas density increase measurement in a film chamber 有权
公开(公告)号：US10514317B2
公开(公告)日：2019-12-24
申请号：US15126495
申请日：2015-03-12
申请人： INFICON GmbH
发明人： Daniel Wetzig , Silvio Decker
IPC分类号： G01M3/32 , G01N21/3504 , G01N21/49 , G01N21/64 , G01N21/65 , G01N21/03
摘要： A method for a tightness test of a test piece (16) in a test chamber (10) whose wall is at least partly made of a flexible material, wherein said test piece is introduced into said test chamber and said test chamber is then evacuated, is characterized in that the tightness test is performed by measuring the gas density inside said test chamber (10) in the area outside said test piece (16).

10. 发明授权

US10309862B2 Film chamber with measuring volume for gross leak detection 有权
公开(公告)号：US10309862B2
公开(公告)日：2019-06-04
申请号：US15511050
申请日：2015-09-14
申请人： INFICON GmbH
发明人： Silvio Decker , Norbert Rolff
IPC分类号： G01M3/26 , G01M3/32
摘要： A film chamber for receiving a test object which is to be tested with respect to the presence of a leak, wherein the film chamber has walls enclosing a film chamber volume, said walls having at least one flexible wall region, wherein a measuring volume adjoining the flexible wall region is arranged on the side of the flexible wall region which is situated opposite the film chamber volume and is hermetically separated from the film chamber volume.

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