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4934176 |
Method and apparatus to determine amount of gas and size of gas voids entrained in viscous substances
A method of determining the amount of air contained in a viscous building material, such as concrete or asphalt, is provided. A sample of the material is placed in a fluid-tight container and a...
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4934182 |
Process and apparatus for determining water content of materials
A device and process to measure the water content of a material or the water permeability of a membrane by stably humidifying a carrier gas stream and passing it through calcium carbide to convert...
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4918981 |
Method for measuring moisture vapor transmission rate in wearing apparel
A method and apparatus for testing wearing apparel that defines an enclosure for moisture vapor transmission. Thin, flexible, waterproof liners which have a high permeability to moisture vapor are...
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4914810 |
Apparatus for measuring the pore size of enhanced tubes
An apparatus for measuring the surface pore size in an externally enhanced evaporator tube. Basically, the apparatus includes a pressure housing and gage that are sealingly engagable around a...
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4912963 |
Method and an apparatus for evaluating the gas purifying ability of a gas purifier
A method and an apparatus for evaluating the gas purifying ability of a gas purifier are described. The method for evaluating the gas purifying ability comprises the steps of sealing the gas...
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4912964 |
Sample supporting device having small contact region with sample suitable for ventilation-characteristics measuring apparatus
A sample supporting device includes a cylindrical body, a sample supporting member, and a holding ring member. The sample supporting member made of a rubbery material is detachably mounted on the...
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4911028 |
Apparatus and method for carrying out measurements on a bobbin of sheet material
An apparatus and method for automatically stripping sheet material from a bobbin, measuring characteristics of the material and labelling the bobbin. The apparatus includes a delaminator pick-up...
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4907448 |
Apparatus for measuring resistivity of porous rock
Apparatus is provided for measuring resistivities along the length of a core sample of a porous rock under confining pressure and varying fluid saturations. A confining pressure sleeve surrounds...
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4907442 |
Method and system for determining fluid saturations within natural or simulated fractures
A method and system for determining fluid saturation within a fracture. The method comprises the steps of establishing a functional relationship between fluid saturation and capacitance for a...
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4905500 |
Paper web surface cleaner or tester
A surface cleaner that may take the form of a surface strength tester or lint remover for paper wherein lint or like material is freed from the surface of a paper web travelling past the cleaner....
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4892621 |
Method and device for measuring permeability/penetrability of fabric in a paper machine
The present invention concerns a method in a paper machine for the measurement of air penetrability or permeability of fabrics penetrable by air, in particular of a wire or felt. In the method, the...
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4891967 |
Method and apparatus for determining the average fineness of loose fibres
Instead of a measuring chamber with a fixed volume, the present chamber is formed as a cylinder (12) with a piston (3) movable therein. The piston is pressed against the fibre sample (29) with...
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4888977 |
Method of ascertaining the rate of fluid flow through the ventilation zones of rod-shaped articles of the tobacco processing industry
The degree of ventilation of ventilation zones in the wrappers of filter cigarettes is ascertained by confining the ventilation zones of successive cigarettes in a chamber during travel through a...
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4884436 |
Automated tension infiltrometer
An automated tension infiltrometer including a soil contacting base to which is mounted a porous plate for interfacing the infiltrometer with the soil to be analyzed. A Marriotte column is...
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4884438 |
Method and apparatus for measuring fluid flow parameters through naturally fractured media
A method and apparatus for determining certain fluid flow parameters for naturally fractured media. Specifically provided is a method and apparatus to measure the flow rate, pressure drop, fracture...
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4881176 |
Filter analyzing system
An in situ apparatus and method to clean filter housing and related piping, sterilize and perform integrity testing of a filter for purifying a gas or liquid to be used within various industrial...
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4880499 |
Method for measurement of the permeability to water
A method for measuring the permeability of pervious sheet material is disclosed; the measurement is based on the flow rate of water ejected at a given pressure between 2 and 1000 kPa through a...
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4875360 |
Method and device for checking filters
In a method for checking filters for permeability, in particular for the presence of leaks or other faulty zones which have increased permeability in comparison with other filter zones for...
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4872974 |
Apparatus for testing membrane filters, and for sterilizing liquids with use of membrane filter
A membrane filter testing method comprises increasing the pressure at the primary side of a membrane filter fixedly accommodated in a housing and wetted with a liquid, by a gas at a predetermined...
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4868751 |
Method for determining relative permeability of a subterranean reservoir
A core sample from a subterranean reservoir is placed in a pressure cell holder and the core pressure is measured at a plurality of pressure points along the core before and during fluid flooding....
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4864846 |
Self-cleaning poppet valve for a core testing apparatus
A poppet valve is mounted internally of a core tranfer piston of a core testing device. The valve face of the poppet valve is smoothly configured so that particulate matter will not cling thereto....
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4864845 |
Electronic field permeameter
For making rapid, non-destructive permeability measurements in the field, a portable minipermeameter of the kind having a manually-operated gas injection tip is provided with a microcomputer system...
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4862730 |
Test method for determination of moisture vapor transmission rate
A method is described for determining the degree of moisture vapor transmission of certain materials which comprises taking a weighed test cup containing a saturated salt solution sealed inside the...
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4863696 |
Apparatus for the percutaneous absorption of fluids
An orifice assembly for use in connection with diffusion cells for the percutaneous absorption of fluids which is composed of a pair of resiliant and mating members having structure for securely...
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4858628 |
Smoking machine
A method and apparatus for automated smoking to replicate a predetermined draw profile of a smoking article is disclosed. In preferred embodiments, the smoking apparatus is digitally controlled and...
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4854157 |
Device for measuring effective porosity
A device for measuring the effective porosity of a sample comprising, a device for defining a cavity defining an opening, a device for sealing the sample around the cavity opening, a device for...
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4852389 |
System for controlled humidity tests
A system for controlled humidity tests wherein gas transmission through a barrier may be measured, including apparatus for controllably mixing a dry gas and wet gas, for conveying the mixed gas to...
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4848145 |
In-situ linear flow proppant conductivity test cell
An in-situ linear flow proppant conductivity test cell is provided which allows a downhole fracturing operation to be accurately simulated under laboratory conditions. The test apparatus includes a...
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4846970 |
Cross-flow filtration membrane test unit
A cross-flow filtration membrane test unit having a bottom cell body, a top cell body and a pair of laterally spaced O-rings forming a seal therebetween. The bottom cell body is provided with a...
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RE32964 |
System for measuring the pore volume and permeability of very tight core plugs and method therefor
A system and method for measuring Klinkenberg permeability and pore volume of a tight core plug sample is provided wherein a pressure transducer is positioned between the sample cell and the...
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4836223 |
Cigarette smoking device
A smoking-down device for cigarettes, wherein a piston in a smoking-down cylinder is driven by an electric stepping motor which receives a series of FM pulses per operating cycle of the...
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4829817 |
Soil-percolation testing method and apparatus
An improved method and apparatus for taking soil percolation tests. In the preferred embodiment the apparatus comprises a threaded shaft; a plurality of marking discs that can be selectively...
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4827761 |
Sample holder
Sample holder apparatus for use in imaging (X-ray CT/NMR) apparatus is provided. The sample holder may be employed to conduct fluid flow studies on a sample and to measure petrophysical properties...
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4817423 |
Method and apparatus for determing distribution of fluids in a porous sample
In the process of collecting data to be used in determining the capillary pressure of immiscible fluids in a porous rock sample, fluid is expelled from the sample by spinning a sample disk about...
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4815316 |
Diffusion measurement
The diffusibility or permeability of a sample of material (6) is determined by mounting the sample in the wall of a chamber (1), having an electrochemical gas sensor (4) fitted therein. If a...
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4807466 |
Method and apparatus for determining the charging of charcoal filters
For determining the charging of a charcoal filter with gases and vapors the acoustical and the electrical impedance of the charcoal layer are measured. The more the filter is charged the greater...
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4799382 |
Method for determining reservoir characteristics of a porous material
Measurements of reservoir characteristics of a core sample of a subsurface formation are carried out with the core sample being subjected to pressure cycling. Pore volume changes during such...
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4779448 |
Photoelectric bubble detector apparatus and method
A photoelectric buffle detector apparatus (20) including a container (22) containing a liquid (24) having a top surface with a top side and an under side. A light emitting source (60) is positioned...
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4773254 |
Automated steady state relative permeability measurement system
An automated method of determining relative permeability is described comprising the steps of injecting known flow rates of water and a hydrocarbon into a core; measuring a pressure differential...
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4766761 |
Method of determining the internal porosity of powders
A method for determining the approximate value of the internal porosity of a powder is set forth wherein a quick determination is achieved by measuring the maximum drawing force of an object such...
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4761997 |
Ground water well dimensioning procedure
The dimensioning of a ground water well is obtained by investigating the yield characteristics of the ground water region by conducting a series of pumping runs using an observation tube in...
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4762010 |
Apparatus and method for adsorption and desorption studies, particularly for characterization of catalysts
A sample is disposed in a sample chamber and is connected by a flow restrictor or "leak" to a bulb of known volume. In adsorption studies, an on/off valve is opened, allowing gas to flow from the...
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4756183 |
Method and apparatus for measuring air permeability of a wall-like or sheet-like element
Method and Apparatus for Measuring Permeability to Air of a Wall-Like or Sheet-Like Element, comprising the use of a measurement head including a blower having an air-discharge nozzle, a blade...
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4753107 |
Core holder
A core holder for use in the testing of a geologic core sample or other similiar cylindrical sample. An elastic rubber sleeve for receipt of a core sample is disposed in an open-ended, cylindrical...
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4751501 |
Variable air volume clogged filter detector
A system for detecting a clogged filter in a variable air volume system having a differential pressure sensor for sensing the differential pressure drop across the filter, an air flow sensor for...
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4744240 |
Method for determining the bubble point or the largest pore of membranes or of filter materials
When determining the bubble point or the largest pore of a membrane or of a filter material, the membrane or the filter material is placed in a container, with the membrane or the filter material...
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4741202 |
Moisture vapor transmission test cell
A test cell comprises a first enclosure which is closed at one end and open at the other. A fan is located near the closed end for supplying conditioned air to the first enclosure and an aperture...
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4740077 |
Centrifugal measurement of core samples
An adaptable, accurate, high resolution centrifuge core measuring method using a single strobe flash per measurement uses a microprocessor controller to control the measuring method, not a...
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4730481 |
Device for testing the air permeability of an article
An improved device for testing the air permeability of an article, particularly felts and screens associated with the manufacture of paper products. The improved device incorporates a measuring...
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4724591 |
Method for measuring the pore size of enhanced tubes
A method of determining the average size of a plurality of pores on the external surface of an enhanced tube having subsurface channels connecting adjacent pores. A pressure measurement apparatus...
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