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4758366 |
Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors
A leak detectable refrigeration composition including a polyhalogenated hydrocarbon refrigerant, a refrigeration oil, or a mixture of the two having a fluorescent dye dissolved therein, is prepared...
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4754638 |
Apparatus and method for leak testing automotive wheel rims
Apparatus is disclosed for detecting minute leaks in wheel rims, including a bell jar cover lowered over a rim previously placed in position on a support member, engagement of surfaces on the cover...
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4748847 |
Non-electrical leak detection method
A method of detecting leaks in a multi-layered roof system comprising ejecting a tracer gas and a propellant gas under a water-impermeable membrane of a multi-layered roof system and detecting any...
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4735084 |
Method and apparatus for gross leak detection
A helium mass spectrometer leak detector includes a spectrometer tube connected to the inlet of a high vacuum pump. Helium tracer gas passes in reverse direction through the high vacuum pump from...
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4724799 |
Steam generator in which the heat-carrying fluid is a liquid metal and the detection of leakages is carried out by sampling this liquid metal
A steam generator in which the heat-carrying fluid is a liquid metal and the detection of leakages is carried out by sampling the liquid metal. The end of the steam generator through which the...
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4725551 |
Rapid leak detection system
A method and apparatus for the rapid detection and pinpoint location of leaks in one or more of a plurality of subsurface fluid storage tanks. A quantity of tracer material such as a fluorinated...
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4722219 |
Method and apparatus for zero drift compensation in a leak detector using a trace gas detector circuit
A method and apparatus are disclosed for automatically compensating for the effects of variations in ambient trace gas levels or other causes of drift in trace gas leak detection testing, by...
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4715213 |
Flow measurement system
A method and apparatus for measuring the leakage flow rate through a labyrinth seal is disclosed. This is achieved by first injecting a tracer gas through a spray tube at an upstream region of the...
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4709576 |
Leak detection method and apparatus
Apparatus for determining if an underground storage tank is leaking provides simple determination by a layman. A housing containing a detection tube is lowered into a well in the vicinity of the...
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4709577 |
System for continuously monitoring for leaks in underground storage tanks
An apparatus and method for detecting leaks from underground gasoline storage tanks and the like by routine or periodic soil samples tested for a particular tracer. A fluorinated halocarbon...
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4701861 |
Filter test device
A filter test device comprises an inlet which communicates with a gas source, an outlet which communicates with the inlet of a filter vessel, a pneumatic valve apparatus disposed between the inlet...
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4694695 |
Sewer pipe smoke blocking device
A sewer pipe smoke blocking device for inserting into a sewer pipe to prevent smoke introduced into the pipe from leaking therepast, having a hollow cylindrical housing adapted for receipt into the...
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4693118 |
Pneumatic tire leak detector
An apparatus for detecting the location of a leak in a pneumatic tire. A leaking tire is filled with a suspension which is capable of flowing through a leak of the tire and staining the perimeter...
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4690689 |
Gas tracer composition and method
The invention provides a method for tagging methane by adding thereto one or more of the tracer compounds sulfur hexafluoride and chloropentafluoroethane. The methane being tagged is normally being...
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4688627 |
Detecting leaks in a heat exchanger in operation
The process is suitable for detecting leaks in a heat exchanger for heat exchange between two gaseous fluids, for instance for super heating steam. The heat exchanger has a lower pressure fluid...
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4686849 |
Method for determining mine roof competency
Mine roof competency is determined by injecting a pressurized gas into a borehole drilled in the roof of the mine and measuring the rate of pressure loss. A high rate of pressure loss is indicative...
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4683749 |
Process and system for detecting and measuring a tritium gas leak
The present invention is a method and system for detecting and measuring a tritium gas leak. The method comprises collecting and concentrating any tritium gas escaping from a container in a...
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4683762 |
Containment system
An apparatus, suitable for monitoring the efficiency of a containment system, has an elongate platform for spanning a duct. A carriage is slidably mounted on the platform. First and second drive...
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4673652 |
Method of testing and reconditioning insulating tubular conduits
A non-destructive on-site method of inspection, and testing of the insulating performance and reconditioning of a concentric insulating tubular conduit member is disclosed. The insulating tubular...
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4663962 |
Method and a device for detecting leakage of a tube section
A device for detecting leakage of a tube section communicating with atmosphere at a first end comprises gas filling and flow measuring apparatus for filling the tube section from a second end with...
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4648260 |
Helium detector
A method of detecting a component gas of a gaseous mixture, and apparatus implementing the method, is disclosed. The method includes passing the mixture through a fixed-phase separator to produce...
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4646558 |
Method for leak testing air filters
A HEPA-type, downflow air filter module is disclosed, having a damper supported upon a hollow tube for adjustable movement relative to an opening through which air enters the enclosed chamber or...
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4624130 |
Method for determining borehole or cavity configuration through inert gas interface
A method for determining the erosion of a borehole or cavity by providing a source of liquid inert gas, preferably nitrogen, placing the inert gas in a storage tank, and suspending the storage tank...
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4618855 |
Soil pollution monitoring system
A soil pollution monitoring system includes a plurality of ducts for conveying gases and air past a sensing device. The sensing device detects selected compounds in the gases and air and provides...
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4612798 |
Pneumatic tire leak detector and method
A method for detecting the location of a leak in a pneumatic tire. A leaking tire is filled with a suspension which is capable of flowing through a leak of the tire and staining the perimeter of...
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4608866 |
Small component helium leak detector
A small component leak detector is provided having (i) a vacuum chamber for receiving test objects, (ii) a cryogenic pump, and (iii) a mass detector. The cryogenic pump is capable of entrapping a...
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4606221 |
Method of depolluting a helium leak detector and apparatus implementing the method
A method of de-polluting a helium leak detector in which a pumping station and a gas analyzer (5) connected to the pumping station via an air inlet duct provided with an insertion valve (6). The...
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4596135 |
Method for testing integrity of welds at elevated temperatures
In a method for testing the integrity of welds at elevated temperatures, a pressurized gas mixture is injected in an area between the inner and outer weld of a terminal flange welded to a tubular...
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4593530 |
Method and apparatus for improving the sensitivity of a leak detector utilizing a cryopump
A cryopump and method for using cryopumping to enhance the sensitivity of a leak detection system. The cryopump is used to control the relative pumping speeds of the gases normally frozen out on...
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4584877 |
Method and fixture for leak detection
A method and fixture for leak detection testing of automotive fuel tanks and the like is disclosed. Two separable members are movable together to form a housing having an internal cavity shaped to...
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4583394 |
Device and method for leak location
A method and apparatus are disclosed for detecting the presence of very fine leaks through the walls of an enclosure which include a sniffer nozzle (1) open to the atmosphere, a vessel (5) having...
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4580442 |
Method for locating leaks in normally dry portions of fire sprinkler systems
A method for locating points of leakage of air from a normally air-filled portion of the piping of a fire sprinkling system by filling the normally air-filled portion of the system with an aqueous...
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4580443 |
Detecting leaks
A leak detector has a gas probe 1 for sensing signal gas escaping from an enclosure containing that gas at a pressure slightly in excess of ambient surrounded by a curtain of barrier gas. The...
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4577490 |
Detecting leaks
A leak detector comprises a detector head which is to be scanned across a surface to detect a signal gas eminating from the surface. The opposite side of the surface from the head is supplied with...
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4576038 |
Apparatus for use in leak detection
Apparatus for use in the detection of leaks comprising an annular flexible, gas permeable skirt carried by and projecting from a carrier member which closes one axial end of the skirt. The opposite...
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4574619 |
Method for determining the flow rate of air through a turbine-engine labyrinth seal
A method for determining the air flow through a labyrinth seal of a turbine ngine is disclosed wherein a constant flow rate of an inert gas is injected into the air discharged through the...
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4566313 |
Water vessel leak detector and method of detecting leaks
A leak detection device and method for detecting leaks in a fluid vessel such as a swimming pool from a position above the surface of the fluid is disclosed. The device includes a tubular member...
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4565093 |
Method for facilitating hermeticity leakage testing of an electrical feedthrough
A method of manufacturing and testing an electrical feedthrough having a metal ferrule, and electrical lead, a glass seal for centrally locating the electrical lead axially within the ferrule, for...
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4558587 |
Ball-type vacuum valve for leak detection apparatus
In a system for leak detection having many valves, it is desirable to have high vacuum valves operated by solenoids at opposite ends of a diffusion pump in order to isolate the diffusion pump...
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4557139 |
Leak detection method and apparatus
A leak detection apparatus for pipe couplings includes a sleeve for enclosing a small volume on the exterior of a pipe joint with a flow passage on the sleeve for communication with a detection...
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4553435 |
Elevated transient temperature leak test for unstable microelectronic packages
A novel method and apparatus for detecting leaks in glass-to-metal seals of microelectronic devices and the like are described which comprise a double-gasketed vacuum station including a base plate...
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4550593 |
Turbomolecular pump suitable for performing counterflow leakage tests
A turbomolecular pump for counterflow leakage tests and the method of its use arranges two, tandem turbomolecular pump stages for pumping toward each other and connects opposite ends of the tandem...
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4548068 |
Downflow air filter construction and methods for air flow adjustment and leak testing thereof
A HEPA-type, downflow air filter module is disclosed, having a damper supported upon a hollow tube for adjustable movement relative to an opening through which air enters the enclosed chamber or...
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RE31952 |
Method and apparatus for the leak testing of filters
A method and apparatus for the leak testing of one or more filters, which requires minimum space, and which comprises a housing adapted to sealably mount the filters means apparatus for...
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4524607 |
System and method for locating leaking tubes
A system and method for detecting, and then specifically locating, a leaking tube or tubes from among a plurality of tubes which extend through a chamber and are accessible at their opposite ends...
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4515751 |
Moisture content and gas sampling device
An apparatus and method for measuring minute quantities of moisture and other contaminants within sealed enclosures such as electronic assemblies which may be subject to large external atmospheric...
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4515007 |
Method of and apparatus for testing the integrity of filters
A method of and apparatus for testing the integrity of individual filters or filter stages of a multistage filtering system including a diffuser permanently mounted upstream and/or downstream of...
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4510792 |
Apparatus for measuring and displaying leakage rates in a tracer gas leakage detector
A tracer gas leakage detector mainly comprises a primary vacuum pump which is selectably connectable to a unit to be tested for leakage, an inlet valve also connectable to the unit to be tested and...
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4507954 |
Wraparound used for testing tubing with premixed gases
A pipe joint testing device for testing the joint integrity of two connected pipe sections, each having a bore and pressurized with gas at the joint area during testing uses an annular envelope...
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4499752 |
Counterflow leak detector with cold trap
A counterflow helium mass spectrometer leak detector includes a test port for receiving a gas sample including the tracer gas helium, a high vacuum pump such as a diffusion pump and a mass...
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