| Patents for G01M 3 - Investigating fluid tightness of structures (22,573) |
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| 01/28/1991 | CA2020999A1 Process for the fabrication of rehabilitation of storage tanks, and tanks thus obtained |
| 01/26/1991 | CA2021503A1 Method and apparatus for detecting changes in the liquid level of a storage tank |
| 01/23/1991 | EP0408938A2 Device for inspecting the fluid tightness of a separation wall |
| 01/22/1991 | US4986749 Method for determining a leak in a breast wall of a regenerative heat recuperator |
| 01/22/1991 | US4986113 Liquid tank leakage detection system |
| 01/22/1991 | CA1279398C Ultrasonic method and apparatus for detecting leaks |
| 01/17/1991 | DE3923115A1 Water leak detection - uses spanner-type appts. with two parts to hold probe body in saw to melt on water contact |
| 01/17/1991 | DE3922314A1 Testing container sealing, e.g. of spray cans - immersing in liquid and detecting escaping gas bubbles optoelectronically with high sensitivity |
| 01/16/1991 | EP0408480A1 Apparatus for controlling the tightness of a network of metallic covered cables |
| 01/15/1991 | US4985763 Jet nozzle for propelling an apparatus along a conduit and apparatus provided with such a jet nozzle |
| 01/15/1991 | US4985682 Leak monitor for secondary containment of liquid stored in underground storage tanks |
| 01/15/1991 | US4984450 Method of leak testing a test container with a tracer gas |
| 01/15/1991 | US4984449 Ultrasonic liquid level monitoring system |
| 01/15/1991 | US4984448 Leak detector and utilization pressure manifold |
| 01/12/1991 | WO1991000990A1 Device to control the water-tightness of a cable network with a metal sheath |
| 01/10/1991 | DE3922209A1 Measuring gas tightness of cased underground bore - measuring liquid level displaced by compressed gas |
| 01/10/1991 | DE3920723A1 Profiled sensor e.g. for liq. level monitoring - has zones generating signal when in common contact with conducting medium |
| 01/09/1991 | EP0407368A1 Apparatus and method for detecting leaks in surgical gloves |
| 12/27/1990 | WO1990015977A1 Fluid control valve and system with leak detection and containment |
| 12/25/1990 | US4979820 Single ended, laser Schlieren system |
| 12/25/1990 | US4979390 Method and apparatus for testing relative permeability of materials |
| 12/20/1990 | DE3931340A1 Pneumatically testing sheath of heavy current cable - by sending natural gas under pressure along certain length between sheath and insulation |
| 12/19/1990 | EP0402534A1 Device for detecting leak in metering cylinder of liquid filling machine |
| 12/18/1990 | CA1277874C Leak testing device for pressure vessels |
| 12/13/1990 | WO1990015284A1 Gas distribution system for a dwelling |
| 12/13/1990 | DE4000486C1 Container sealing tester suitable for vats - has chain drive with switching cam guided in rails of rotatable cross |
| 12/13/1990 | DE3918478A1 Locating leakage in concealed pipe system for liquids - by emptying liq. filling with pressurised gas and detecting sound of escaping gas |
| 12/12/1990 | EP0401447A1 Method and system for controlling the tightness of an enclosure. |
| 12/11/1990 | US4976136 Method of testing for fuselage cracks |
| 12/11/1990 | CA1277550C Leak detector with two stage piston chamber |
| 12/06/1990 | DE4012983A1 Axial compensation of district heating pipe lines - consisting of PTFE or teflon seal rings allowing compensator to absorb expansion movements |
| 12/04/1990 | CA1277387C Leak detector and locator utilizing time domain reflectometry and sampling techniques |
| 12/04/1990 | CA1277156C Fuel tank leak detection apparatus |
| 11/28/1990 | EP0399583A2 Apparatus and method for analysing the pulse propagation for testing a pipeline or the like |
| 11/27/1990 | US4974168 Automatic pipeline data collection and display system |
| 11/27/1990 | US4972867 Valve stem seal leak protection and detection apparatus |
| 11/27/1990 | US4972710 Liquid level multiplier and leak detection system for storage tanks |
| 11/27/1990 | US4972700 Fuel leak sensor system |
| 11/22/1990 | EP0397816A1 Secondary containment system using flexible piping |
| 11/22/1990 | DE4016004A1 Hydraulic drive for mining machinery with leakage monitor - produces alarm signal when actual value of pressure in hose falls below idling set-point value |
| 11/22/1990 | DE3934057C1 Leak indicator for double-walled container - has vacuum switch coupled to monitoring cavity between walls via measuring lead to control vacuum pump |
| 11/20/1990 | WO1990014584A1 Leak detection for hydraulic drive systems |
| 11/20/1990 | US4972179 Liquid leakage detection apparatus including wheatstone bridge |
| 11/20/1990 | US4971214 Double shell thickener |
| 11/20/1990 | CA2033162A1 Leak monitor for hydraulic drive systems |
| 11/20/1990 | CA1276704C Attachment bracket for a liquid leakage sensor used in drain openings |
| 11/20/1990 | CA1276702C Event location using a multiwire system |
| 11/15/1990 | WO1990013803A1 Monitoring system and method for performing gas analysis |
| 11/13/1990 | US4970467 Apparatus and method for pulse propagation analysis of a pipeline or the like |
| 11/13/1990 | US4969749 Apparatus and method for measurement of average temperature change in a storage tank |
| 11/13/1990 | CA1276260C Liquid leak sensor with spacer |
| 11/13/1990 | CA1276254C Method for detecting and obtaining information about changes in variables |
| 11/13/1990 | CA1276253C Event location using a locating member containing discrete impedances |
| 11/13/1990 | CA1276233C Method and apparatus for locating leaks in a multiple layer geomembrane |
| 11/08/1990 | DE4011258A1 Low voltage cable production - having wires held in folded textile formed into cable with plastic sheath |
| 11/06/1990 | US4967592 Test probe for use in a storage tank leak detection system |
| 10/31/1990 | EP0310526B1 Method and device for controlling the pressure on a seal or within a container |
| 10/31/1990 | DE3913521A1 Detecting leakage points in coolant circuit of refrigeration system - measuring pressure and temp. of vaporised coolant at suction side of compressor and comparing with stipulated value |
| 10/30/1990 | US4966190 Check valve for a leak detector |
| 10/23/1990 | US4965698 Capacitance humidity sensor |
| 10/23/1990 | US4965554 Moisture presence alarm system |
| 10/23/1990 | US4964296 Method and apparatus for detecting liquid leaks |
| 10/23/1990 | CA1275490C Method and apparatus for determining the profile of a subterranean passage |
| 10/18/1990 | WO1990012301A1 Quantifying isolation valve leakage |
| 10/17/1990 | EP0392885A1 Procedure for leak-testing compartments for storing goods, in particular bulk cereals |
| 10/16/1990 | US4963742 Leak detection and multispectral survey system |
| 10/15/1990 | WO1990013102A1 Method and apparatus for testing personal barriers |
| 10/15/1990 | CA2072101A1 Method and apparatus for testing personal barriers |
| 10/11/1990 | DE4011259A1 Moisture sensor cable - for monitoring district heating pipes with conductors enclosed in specified plastic insulation |
| 10/11/1990 | DE3911648A1 Leak location arrangement with acousto-electrical transducer - selects and increments noise class memory locations according to digitised filtered noise signals and compares with reference |
| 10/10/1990 | EP0391580A2 A solvent responsive signal-carrying device |
| 10/10/1990 | EP0332652A4 Method and apparatus for locating leaks in a multiple layer geomembrane |
| 10/09/1990 | US4961339 Device for testing articles of clothing for waterproofness |
| 10/06/1990 | WO1990012302A1 Container seal testing method and system and testable container structure |
| 10/06/1990 | CA2030811A1 Container seal testing method and system and testable container structure |
| 10/03/1990 | EP0390352A2 Apparatus for remotely controlled movement through tubular conduit |
| 10/03/1990 | EP0390330A2 Method and apparatus for testing the quality of a seal |
| 10/03/1990 | EP0390232A2 Process for checking the tightness of a casing, and device for carrying out said process |
| 10/02/1990 | US4961064 Oil leakage sensor |
| 10/02/1990 | US4960079 Acoustic leak detection system |
| 09/27/1990 | DE3909337A1 Method and apparatus for testing underground pipes, carrying gas or liquid, for leakage |
| 09/26/1990 | EP0389009A2 Method for determining a leak in a breast wall of a regenerative heat recuperator |
| 09/25/1990 | US4959639 Fluid detecting |
| 09/20/1990 | DE3908903A1 Signalling core, and an electrical or optical cable having a signalling core, as well as a cable network made of cables having a signalling core |
| 09/19/1990 | EP0387542A2 Device for detecting leaks in liquid petroleum gas containers |
| 09/19/1990 | EP0387298A1 Angioplasty dilating guide wire |
| 09/18/1990 | US4958296 Water-leakage detecting apparatus and method which are little influenced by noise |
| 09/13/1990 | DE3907490A1 Device for monitoring leaks in pipework filled with a fluid |
| 09/12/1990 | CN2062044U Dry / wet type leakage detector |
| 09/11/1990 | US4956635 Method and apparatus for testing personal barriers |
| 09/11/1990 | US4955726 Perfluoropolyethers used as fluids for testing in electronic field |
| 09/11/1990 | US4955226 Method and apparatus for automatically detecting the presence of holes in filled and sealed packed plastic bags |
| 09/11/1990 | CA1274004A1 Water penetration-detecting apparatus and optical fiber cable using same |
| 09/07/1990 | WO1990010209A1 Liquid-detecting cable |
| 09/07/1990 | WO1990010208A1 Cable for locating fluids |
| 09/05/1990 | CN2061689U Ultrasonic leakage detector for gas cable |
| 09/04/1990 | US4954973 Microprocessor based tank test management system |
| 09/04/1990 | US4953396 Leak detector for containers |
| 08/29/1990 | EP0384743A1 Apparatus for eliminating measuring inaccuracies in a storage tank leak detection system |
| 08/29/1990 | EP0383996A1 Apparatus and an associated method for leak and volume inspection of containers |