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6021661 |
Apparatus for determining pore volume distribution of multiple samples by intrusion of a non-wetting liquid
A high pressure mercury porosimeter for continuous pore volume distribution measurements that simultaneously receives two or more test sample penetrometers, each containing a powder or porous solid...
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6009743 |
Apparatus and method for online or offline measurement of vapor transmission through sheet materials
An apparatus for measuring and comparing the permeant transmission rate through film material on a moving conveyor, including a first and second chamber through which the film material is moved, a...
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5987961 |
Apparatus and method for testing paving
An apparatus for testing asphalt or other paving samples includes a cabinet for housing the mechanical elements of the invention, and a computerized control console for monitoring and controlling...
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5983708 |
Gravimetric cup
A gravimetric cup for containing a liquid sample to be measured for moisture or vapor transmission loss therefrom, such gravimetric cup having a lower cup body and a cover, the cover having an...
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5979223 |
Device intended for measurements on a porous sample in the presence of fluids, using temperature-resistant semipermeable membranes
Device intended for measurements on a porous rock bar in the presence of fluids including a containment cell comprising an elongate body (2) closed at the opposite ends thereof by end pieces (6, 7)...
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5974859 |
Method and apparatus for measuring coupled flow, transport, and reaction processes under liquid unsaturated flow conditions
The present invention is a method and apparatus for measuring coupled flow, transport and reaction processes under liquid unsaturated flow conditions. The method and apparatus of the present...
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5970782 |
Gradient filtration apparatus
Particles such as bacteria may be enumerated from a liquid in an accurate and efficient manner through use of an apparatus including a filter sheet which is oriented transverse to the surface of...
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5965810 |
Method for determining sedimentary rock pore pressure caused by effective stress unloading
An improved technique to more accurately calculate pore pressure of sedimentary rock due to subsurface fluid expansion. The technique is built upon a combination of known force balanced in situ...
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5939617 |
Method and apparatus for testing the filtration efficiency of cloth materials intended for use in a clean room environment
A method and an apparatus for testing the filtration efficiency of cloth materials intended for use as garments, masks, or gloves in a clean room environment where semiconductor chips are...
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5913235 |
Procedure for determining the diffusion coefficient prevailing in a fibre wall
The invention relates to a procedure for determining a quantity dependent on the rate of diffusion in the fibre wall for diffusion occurring through it, in which procedure a diffusible tracer is...
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5908993 |
Apparatus for measuring total surface area of a portion of catalytic metal particles
According to the present invention, there is provided an apparatus for measuring total surface area of a portion of catalytic metal particles carried on the surfaces of pores in a carrier of a...
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5907091 |
Procedure and device for the measurement of water vapor transfer through textiles and other plate-like materials
The invention provides a method for measurement of characteristics related to water vapor transfer through plate-like material samples, in particular textile materials, and a measuring unit device...
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5905197 |
Membrane sampling device
A membrane sampling device for use in a membrane filtration system having one or more pressure vessels for determining whether a filter membrane elements are performing properly or need...
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5895841 |
Method and apparatus for performing adsorption and desorption analysis of samples
An adsorption and desorption analyzer for performing analyses on samples comprises a manifold for selectively storing one or two gases or vapors having different critical temperatures, at least two...
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5892142 |
Fiber micronaire testing system
A gin process control system including sensing stations for sensing the physical properties of cotton as it progresses through a gin. A moisture sensor determines, over a wide range of values, the...
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5887477 |
Apparatus and method for testing waterproofness and breathing fabrics
The apparatus for testing the characteristics of waterproofness and breathability of fabrics includes a demonstration unit, a base unit, and a fluid conduit and valve. The demonstration unit has a...
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5869755 |
Porosity estimation method in carbonate rock
An acoustical method of determining the spherical, or vuggy, porosity in carbonate rock formations, as a function of shear modulus. Total porosity and shear modulus of the formation is measured....
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5866801 |
Universal penetration test apparatus with fluid penetration sensor
A universal penetration test apparatus for measuring resistance of a material to a challenge fluid. The apparatus includes a pad saturated with the challenge fluid. The apparatus includes a...
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5858791 |
Method and device for the continuous measurement of variations in the overall saturation of a sample with incompressible immiscible fluids
Saturation variations are obtained by displacing a first fluid (for example water) that initially saturates a sample (1) coated with resin (2) by injecting therein, through a first end plate or cap...
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5844136 |
Device for measuring the permeability of rock fragments
The present invention relates to a device used for the direct measurement of the permeability of rock fragments coming directly from the drilling of an oil well and commonly called cuttings,...
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5837888 |
Process for measuring vapor transmission through materials
A process for measuring the vapor transmission rate characteristics of a test material by first measuring the vapor transmission through a test chamber and sample material and subsequently...
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5832409 |
Automated gas permeameter
An automated gas permeameter measures permeabilities of porous samples, such as rocks, ranging from 0.1 milliDarcys to 10 Darcys within 0.5% under dry and humid conditions. The automated gas...
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5824882 |
Device for checking the porosity of thin rubber products
Proposed is a device for testing the porosity of dielectric foil, particularly rubber products, such as condoms (2) with a cover holder over which the rubber product is placed, and of one or more...
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5817924 |
Method and apparatus for measuring oxygen transmission through contact lenses
An apparatus for measuring the gas transmission rate through contact lens material, and a method of measuring, using a test cell having an upper and lower gas chamber and separating the upper and...
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5808181 |
Method for testing a filter in a dialysis system
A method for testing filters arranged in the dialysis solution system of an extracorporeal blood treatment apparatus is described, in which the filter membrane being tested is fully wetted with an...
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5804715 |
Hydrodynamic dampening system for the precise measurement of dynamic sediment pore water pressure
A multi-sensor piezometer is disclosed that includes a shaft and an upper amber. The shaft houses a plurality of porous stones that operatively cooperate with the positive input of respective...
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5789662 |
Method and apparatus for determining spatial distribution of fluids migrating through porous media under vacuum-induced pressure differential
A method and apparatus are provided which determine the spatial distribution of fluids in a porous media contained in a three-dimensional cell as such fluids migrate through porous media in...
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5789663 |
Porous medium test with tracer recharging and discharging through a single well
A method for quantitatively measuring the characteristic physical parameters of a porous medium, such as an aquifer that is initially recharged at a recharge rate and subsequently discharged at a...
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5786528 |
Water intrusion test for filters
An improved water flow test for determining the integrity and/or pore size distribution of a porous filter is disclosed. The improvement involves the ability to determine and take into account the...
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5763765 |
Method and apparatus for detecting and locating perforations in membranes employed in electrochemical cells
A method and apparatus detects and locates perforations in membranes used in electrochemical cells. The membrane has first and second oppositely facing major planar surfaces. The first surface is...
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5756907 |
Method of measuring properties of sand
A method is provided for accurately and easily measuring properties of sand. This method includes the steps of measuring contraction properties of the sand, determining a molding parameter for...
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5750882 |
Gas permeability measurements for film envelope materials
Method and apparatus for measuring the permeability of polymer film materials such as used in super-insulation powder-filled evacuated panels (PEPs) reduce the time required for testing from...
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5744699 |
Method and apparatus for adsorption measurement using temperature-compensated constant-volume adsorption apparatus
A method and an apparatus for adsorption measurement suitable for a small-surface area determination are disclosed. The apparatus includes (a) a temperature-compensated constant-volume adsorption...
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5738826 |
Ussing chamber
An apparatus which is in the nature of an Ussing chamber utilizing a discrete separation between the two chambers in which solutions used for testing tissue are located is described. The cartridge...
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5736632 |
Apparatus for measuring air permeability of molding sand
An apparatus is disclosed to measure with accuracy and stability the permeability of molding sand that is compacted, by directly applying compressed air to the compacted molding sand such that the...
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5733441 |
Pre-wet system for a filter
The present invention is a prewet system for a filter. The present invention includes a power controller. A first container is used for storing iso-propyl alcohol liquid. An air pump is connected...
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5731511 |
Measuring cell with multiple pressure taps
A device for studying the interaction of a fluid flowing in a porous medium surrounded by a membrane and subjected to a confining pressure includes on at least part of the circumferential periphery...
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5728930 |
Method and device for measuring the permeability of a drying wire to air
A method and device for measuring the permeability of a drying wire to air in which the measurement is carried out continuously while the drying wire moves. The drying wire is guided to run so that...
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5725720 |
Detector for envelopes made of plastic, and flat article processing equipment including such a detector
The apparatus of the invention for discriminating mail in a paper envelope from mail in a plastics envelope makes use of a pneumatic technique. In particular, the apparatus comprises a pneumatic...
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5725737 |
Apparatus for the detection of holes and plugged spots
The invention relates to an apparatus for detecting plugged sites and holes and for measuring of the water permeability properties of pervious machine fabrics. Plugged sites in a permeable fabric...
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5719327 |
Sand pack holder
A sand pack holder is provided for testing the properties of a sand sample or testing the performance of an oil recovery process in the sample. The sample is pressurized within the holder to...
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5719328 |
Pressure drop tester for filter rods
A device is provided for testing a pressure drop across a cigarette filter rod. The device includes an expansible sleeve for encapsulating a filter rod and a two stage vacuum pump connected...
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5698772 |
Method and device for determining different physical parameters of porous material samples in the presence of two-phase or three-phase fluids
A sample S is placed in a rigid body 1 of a device, in a containment cell laterally delimited by a supple sheath 21 and, at the two opposite ends thereof, by two cell ends 13, 14. Channels (15, 16)...
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5689068 |
Determination of the porosity and permeability of a geological formation from an electrofiltering phenomenon
The porosity and permeability of a geological formation (2) are determined on the basis of an electrofiltering phenomenon by exploiting the existence of non-linear electrofiltering phenomena. One...
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5681988 |
Apparatus for indicating the degree of dirtiness of a filter
An apparatus for indicating the extent to which an air filter in an internal combustion engine is fouled. For this purpose the apparatus includes a pressure sensor, a sensor to detect the...
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5679885 |
Process and device for measuring physical parameters of porous fluid wet samples
A process involves placing a solid sample imbibed or saturated with a first fluid (for example water) in a closed chamber; injecting, via pressure means, another liquid under pressure at a first...
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5677478 |
Pressure relief system for filtration testing apparatus
A replaceable primary rupture disk placed in the main body of a cylindrical test chamber functions as a safety device and ruptures to relieve pressure from the chamber when the pressure exceeds a...
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5674404 |
Filter integrity test method for dialysis machines
A method is described for automatically testing the integrity of a dialyzer filter within a dialysis machine. The method consists of substantially removing fluids which may be present from the...
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5672814 |
Soil analysis method including saturation/drying test using undisturbed core sample
An improved soil analysis is provided which provides accurate data representative of actual physical conditions of the soil. Preferably, the method involves first obtaining a core sample of soil...
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5672813 |
Turf analysis method employing substantially undisturbed core samples and strata thereof
An improved soil analysis is provided which provides accurate data representative of actual physical conditions of the soil. Preferably, the method involves first obtaining a core sample of soil...
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