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| Number | Title | Issue Date |
| 6308556 | Method and apparatus of nondestructive testing a sealed product for leaks A leak detection system for testing a sealed product for leaks includes a test chamber, a pressure system that is operable to maintain a substantially constant pressure during a test period, and a leak sensor coupled to the test chamber via a first condui... | 10/30/2001 |
| 6305215 | Method for leak testing and leak testing apparatus 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 press... | 10/23/2001 |
| 6301954 | Segemented measuring probe for sewage pipes A method and apparatus for determining leaks in sewage pipes. The apparatus includes a measuring probe having several radially arranged measuring electrode segments, the measuring probe being positioned in the sewage pipe. With the probe sections and elec... | 10/16/2001 |
| 6298712 | Fuel cap tester An apparatus and a method for testing the integrity of fuel or gas caps for leaks is disclosed. A microprocessor controls the pressurization of an air reservoir which selectively allows air to pass to either the combination of the fuel cap under test and ... | 10/09/2001 |
| 6295863 | Method and apparatus for determining seal failure in a ball joint A method of determining seal failure is implemented in a ball joint including a stud having a ball embedded in grease within a sealed socket assembly. A dielectric characteristic of the grease is measured to determined if the sealed socket assembly has fa... | 10/02/2001 |
| 6289721 | Method for detecting a tanking operation on a receptacle The invention is directed to a method for detecting a filling or tanking operation on a receptacle. The pressure is measured to obtain a trace of pressure as a function of time which is characteristic for a tanking operation. A conclusion that a tanking o... | 09/18/2001 |
| 6282945 | Method and system for aggressive cycling of leak detection pump to ascertain vapor leak size A system and method for detecting leakage from a evaporative emission space of an automotive vehicle fuel system. A reciprocating pump is operated in a pressurizing mode to build pressure in the space toward a nominal test pressure. The pressurizing mode ... | 09/04/2001 |
| 6279383 | Method and apparatus for detecting leakage A method of, and apparatus for, determining leakage in a valve or the like which is not dependent on bulk modulus of the fluid is described. The test apparatus includes a pressure transducer which measures the change in pressure along a length of pipe (XY... | 08/28/2001 |
| 6280632 | Device and method for preparation of substitution solution Apparatus and methods for providing sterile substitution solutions from a dialysis fluid used in connection with the treatment of a patient's blood in an extracorporeal circuit are disclosed. The apparatus includes pumps or valves for comparing the flow o... | 08/28/2001 |
| 6276194 | Apparatus and method for testing the effectiveness of dynamic seals in a dust-laden operating environment An apparatus and procedure is provided for testing and evaluating the sealing effectiveness of dynamic seals of the type having at least one and often at least two dust-excluding seals. Included is a housing having a support wall formed with an opening th... | 08/21/2001 |
| 6269678 | Leak detector A leak detector includes an off-center mounted metering pin cooperating with a single cross-hole in a poppet valve to accommodate adjustment of the flow rate past the metering pin by rotating the poppet valve about its longitudinal axis. A flow director, ... | 08/07/2001 |
| 6267000 | Leak location When an underground pipe carrying a fluid, such as a buried water-pipe, develops a leak the leak must first be located before it can be repaired. One common location method makes use of the fact that the leaking fluid often creates a noise, typically a hi... | 07/31/2001 |
| 6253598 | Method and system for predicting stabilized time duration of vapor leak detection pump strokes A system and method for indicating leakage from a contained volume for holding volatile liquid, such as from an evaporative emission space of an automotive vehicle fuel system. A reciprocating pump operates to build pressure in the space toward a nominal ... | 07/03/2001 |
| 6251302 | Chemically substituted chromophores and fluorophores of high solubility and their use as fluid visualizing agents The present invention provides, a 3 or 4-amino-1,8-naphthalimide compound having polyether substituent groups at the 3 or 4-position and the imide position. The polyether groups are linked to a hydrocarbon directly linked at the 3 or 4-amino position and ... | 06/26/2001 |
| 6247352 | System for monitoring diaphragm pump failure A diaphragm failure monitoring system for detecting leakage in a diaphragm of a diaphragm pump. The system includes a pump having an operating chamber containing a working fluid and a pumping chamber for pumping material into and out of the pump and a dia... | 06/19/2001 |
| 6244098 | Methods and apparatus for monitoring water process equipment Methods and apparatus are provided for detection of leaks in boilers containing a temperature control liquid which is supplemented with feedwater and removed as blowdown, main steam and sootblower steam. In a preferred embodiment, the boiler has an automa... | 06/12/2001 |
| 6244099 | Draw furnace sealing assembly and method An apparatus and method for sealing the bottom of an optical waveguide draw furnace is disclosed. The apparatus includes an assembly constructed and arranged to mate with the bottom of the draw furnace to form a seal, and a leak detection system communica... | 06/12/2001 |
| 6234152 | Method of checking the operability of a tank-venting system The invention is directed to a method for checking the operability of a tank-venting system of a vehicle. A pressure source introduces an overpressure into the tank-venting system with the pressure source having operating characteristic variables. A concl... | 05/22/2001 |
| 6230549 | Hand-held fuel cap leakage tester A fuel cap leakage tester is provided comprising a fuel cap support, a pressure source, and a monitor. The fuel cap support is formed to included a test chamber and is adapted to receive a fuel cap to be tested in the test chamber to establish a pressuriz... | 05/15/2001 |
| 6228271 | Method and installation for in situ testing of membrane integrity A process is described for testing the integrity of liquid filtration membranes without the use of pressurized air. The process includes draining the upstream compartment 3 and filling it with air by venting it to the atmosphere; applying a partial vacuum... | 05/08/2001 |
| 6227037 | Diagnosis for evaporative emission control system At the time of a stop of an engine, a diagnostic control unit shuts off a purge line with a purge control valve and an atmospheric port of a canister with a drain cut valve, and thereby holds an evaporative emission control circuit inclusive of a fuel tan... | 05/08/2001 |
| 6220081 | Joining area for two parts that are tightly assembled but detachable from each other, in particular on a container for collecting contaminated liquids such as liquid dielectric of a transformer On a container for collecting contaminated liquids which has container walls surrounding the base of the container or on a collecting vat for liquid dielectric of a transformer, at least one detachable container part being joined to the collecting contain... | 04/24/2001 |
| 6223130 | Apparatus and method for detection of a leak in a membrane of a fluid flow control system An apparatus, method, and computer program product for detection of fluid leakage through a membrane in a fluid flow control system. The fluid flow control system has a first chamber and a second chamber. A membrane is disposed between the first chamber a... | 04/24/2001 |
| 6205846 | Method of determining with great accuracy the rate of leakage from the case of an electrical apparatus In the method, pairs of pressure and temperature values are recorded using a pressure sensor and a temperature sensor fixed to a case from the outside and communicating with a dielectric gas, thereby enabling a density value to be calculated for the diele... | 03/27/2001 |
| 6202477 | Method for leak testing and leak testing apparatus 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 pres... | 03/20/2001 |
| 6192743 | Self-contained leak detection module having enclosure-mounted toggle levers for pump and valve A module for an on-board evaporative emission leak detection system that detects leakage from an evaporative emission space of an automotive vehicle fuel system. A pump disposed within interior space of the module has an inlet in communication with the in... | 02/27/2001 |
| 6192742 | More reliable leakage diagnosis for evaporated gas purge system To perform leak diagnosis, when it is determined (during engine idling) that leakage exists in the purge system air is reintroduced into a purge system. Then, determination of leakage existence is stopped. Accordingly, erroneous diagnosis caused by openin... | 02/27/2001 |
| 6189377 | Device for measuring hydraulic flow quantities and leaks in a specimen In order to improve a device for measuring hydraulic flow quantities and leaks in a specimen, including a measurement path, embodied as an approximately vertically extending lead line to the specimen, and a capacitor sensor, which is disposed in the measu... | 02/20/2001 |
| 6190136 | Diaphragm failure sensing apparatus and diaphragm pumps incorporating same A diaphragm failure sensing apparatus for use in a diaphragm pump having at least two pumping cavities, each pumping cavity having a fluid chamber and a motive gas chamber separated by a pumping diaphragm. The diaphragm failure sensing apparatus includes ... | 02/20/2001 |
| 6187207 | Method and device for checking proper replacement of a used filter in a device for extracorporeal treatment of blood A method and a device for verifying the proper replacement of a used filter that is divided into two chambers by a membrane in a device for extracorporeal treatment of blood. The verification of whether the filter has been properly replaced with a new fil... | 02/13/2001 |
| 6176118 | Device for diagnosing malfunction in a fuel tank According to the present invention, there is provided a device for diagnosing malfunction in a fuel tank. The fuel tank has a separator wall therein which separates an interior of the fuel tank into a fuel chamber and an air chamber. The separator wall is... | 01/23/2001 |
| 6175310 | Leak detection tape An elongated, flexible, flat conductive tape can be applied to any surface to be monitored for water or other liquid leaks, and electrically connected to any suitable type of conventional electrically operated leak detector. A pair of parallel spaced cond... | 01/16/2001 |
| 6167749 | Method and apparatus for automatically detecting gas leak, and recording medium for leak detection A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises ... | 01/02/2001 |
| 6164123 | Fuel system leak detection A vehicle fuel system has on-board diagnostics for leak testing with correction for different operating conditions. An electronic control unit (ECU) is arranged to carry out a periodic two stage leak test, when the engine is running. Stage A includes evac... | 12/26/2000 |
| 6164122 | System and method including multiple test chambers for automated testing for holes in prophylactic device A plurality of test chambers or fixtures are operable for successively testing a plurality of condoms, respectively, in an automated manner. Each test chamber for testing a condom includes a housing containing a porous liner having an interior cavity conf... | 12/26/2000 |
| 6161423 | Apparatus and method for diagnosing leaks of fuel vapor treatment unit A leak diagnosis apparatus and method for a fuel vapor treatment unit where fuel vapor produced in a fuel tank is collected by adsorbing into an adsorption canister and the fuel vapor collected in the adsorption canister is purged under predetermined engi... | 12/19/2000 |
| 6157307 | Floodwater detection and warning device A device for detecting and warning of floodwater about a building structure, the device including a plurality of selectable remote alarm indicators, a matching plurality of alarm selector switches for selectively enabling and disabling the remote alarm in... | 12/05/2000 |
| 6151955 | Device and method for testing a vapor recovery system A device and method for testing for the recovery of vapor in a system in which a fluid is dispensed into a tank through a nozzle, according to which a vacuum is created to induce the flow of the vapor into the nozzle. The vacuum is measured and a display ... | 11/28/2000 |
| 6148854 | System for leak detection from underground and aboveground fuel storage tanks A leak detection system for detecting a fuel leak from a storage tank comsing a vertically positioned reference tube that spans the full useful length of the fuel tank which is generally located underground. The reference tube is filled and drained with ... | 11/21/2000 |
| 6138512 | Method and apparatus for determining source location of energy carried in the form of propagating waves through a conducting medium A method and apparatus for determining source location for acoustic or other waveform energy in a conducting medium. The method includes simultaneously detecting and transducing the source energy at a plurality of points in the medium into a composite sig... | 10/31/2000 |
