52 results about "Planar membrane" patented technology

A water treatment and conveyance system includes a plurality of substantially planar membrane elements arranged in a stack. Adjacent membrane elements in the stack are spaced apart from one another by element spacers. The element spacers have one or more openings that are in fluid communication with the permeate sides of adjacent membrane elements. The openings are sealed off from the source water sides of the membrane elements by one or more sealing members. The openings in the element spacers cooperate to define a conduit for the filtered permeate. Methods for treating water and conveying treated water are also provided.

A shared or common environment membrane reactor containing a plurality of planar membrane modules with top and bottom thin foil membranes supported by both an intermediary porous support plate and a central base which has both solid extended members and hollow regions or a hollow region whereby the two sides of the base are in fluid communication. The membrane reactor operates at elevate temperatures for generating hydrogen from hydrogen rich feed fuels.

A compact plate type membrane filter and its membrane filter element and equipment are disclosed. Said membrane filter is composed of filtering membrane, guiding-supporting layer of membrane, and skeleton with one or more symmetrical guide openings and connected with filtering membrane in sealing mode.

A pressure sensor for sensing a fluid pressure in harsh environments such as the air pressure in a tire, by using a chamber partially defined by a flexible membrane (20), the chamber containing a fluid at a reference pressure, such that the flexible membrane (20) deflects due to pressure differentials between the reference pressure and the fluid pressure; and, associated circuitry for converting the deflection of the flexible membrane (20) into an output signal indicative of the fluid pressure; wherein, the membrane (20) is non-planar (22, 24). It is possible to extend the linear range of the pressure-deflection response with a non-planar membrane (20). Corrugations, a series of raised annuli (22) or other surface features are an added complexity in the fabrication process but can extend the linear range of the sensor by 1 MPa.

A tympanic membrane prosthesis is provided that includes, in combination, a generally flat, planar membrane sized to overlay a tear or perforation in the tympanic membrane and having at least one preformed perforation, and at least one mechanical fixation device for fixing the membrane to the tympanic membrane of a patient. Each mechanical fixation device is a tack component including a sharp, piercing distal end, an enlarged proximal end and a shaft extending therebetween. A tack insertion device is provided to guide the tack to and through the tear covering membrane.

A membrane module for the separation of hydrogen is configured for parallel flows and contains a plurality of planar membrane cells which respectively comprise two hydrogen-selective planar membranes respectively surrounded by a flat membrane frame. An air-permeable distancing layer is arranged between the membranes for removal of the permeate gas and a supply frame surrounding a supply area for the reformate gas. All membrane frames and supply frames have the same outer dimensions and form a stack with planar side surfaces. Two membrane frames of each membrane cell have protruding edges directed towards each other, enabling them to enter into contact with each other, except for at least one first opening towards a side surface of the stack. The supply frame is disposed, except for second and third openings towards the side surfaces of the stack, in a closely adjacent manner to the edges of the membrane frame of two neighboring membrane cells. The outsides of all membrane frames and supply frames, except for first, second and third openings, are welded or soldered to each other in a gas-tight manner.

A method for determining a minimum tension compensation stress which will have a membrane of a thickness of less than or equal to one micrometer, secured to a frame, having, in the absence of any external stress, a desired deflection. The membrane can be made as planar as possible in absence of any external stress, and its thickness can be less than or equal to one micrometer.

Methods and systems for performing optical measurements of the porosity of geometric structures filled with a fill material by a capillary condensation process are presented herein. Measurements are performed while the structure under measurement is treated with a flow of purge gas that includes a controlled amount of vaporized fill material. A portion of the fill material condenses and fills openings in the structural features such as pores of a planar film, spaces between structural features, small volumes such as notches, trenches, slits, contact holes, etc. In one aspect, the desired degree of saturation of vaporized material in the gaseous flow is determined based on the maximum feature size to be filled. In another aspect, measurement data is collected when a structure is unfilled and when the structure is filled. The collected data is combined in a multi-target model based measurement to estimate values of porosity and critical dimensions.

The invention relates to a membrane valve, in particular for inhalation devices, comprising a planar membrane (1) made of permanently flexible material, a frame (2), which has an air opening that is somewhat smaller than the membrane, at least one web (22), which connects the frame to a retainer (23) that is arranged approximately at the center of the air opening, and a pin (3), the shaft of which extends through a fastening opening approximately at the center of the membrane and is located in a retaining opening in the retainer, wherein the membrane lies on the frame in the rest state and wherein the pin is spread to form a head, the distance of which to the membrane is small in comparison to the thickness of the membrane or which head lies on the membrane, and the diameter of the shaft near the head (32) is greater than the diameter of the fastening opening,; and the diameter of the shaft at the free end of the shaft (31) is approximately equal to the diameter of the fastening opening.

A precast reinforced concrete base mat element, a base mat assembly and method for constructing a base mat assembly from a plurality of the base mat elements are described. The base mat element comprises a concrete body having first and second conduits extending there through in first and second generally perpendicular directions and a liner plate anchored in the concrete body. Preferably the concrete bodies have interlocking surfaces formed there on. A plurality of the base mat elements may be juxtaposed together with the interlocking surfaces interlocking with one another and with the tensile members extending through the first and second tensile conduits and being post-tensioned and anchored about the base mat elements to clamp the base mat elements together. The liner plates may then be welded together to form a generally planar membrane. In one embodiment, at least one of the first and second tensile conduits is located above and one below the horizontal center planes of the concrete bodies to limit the base mat elements from displacing vertically relative to one another.

The invention relates to a method for producing a layered visual effect of plastic electroplating, which mainly uses secondary or multiple surface "invasive" processing methods after electroplating on the surface of plastic materials to make the electroplated metal layer form a "plastic" on the surface of plastic material components. Layered" visual effect. And it is covered on the outermost layer to form a protective layer, which can highlight the effect of graphics, symbols and characters, and still present a layered visual effect under the flat film layer.

A filtration container for concentration of macromolecules is insertable into a filtrate recovery tube (5) and has an upper portion (2), a central portion (3) axially adjoining the upper portion (2), and a lower portion (4) axially adjoining the central portion (3). The upper portion (3) forms a hollow-cylindrical sample container (7) with an inlet opening (9) on its upper end face (8). The downwardly tapering central portion (3) has a filtration chamber (11) with two mutually opposed main walls (12, 13) running down toward one another. At least one of the main walls (12, 13) has a filter window (16) for receiving a planar membrane filter (17). The lower portion (4) forms a retentate chamber (21) adjoining the lower edge (18) of the filter window (16) A base (26) of the retentate chamber (21) slopes down on one side laterally.

The invention relates to a membrane that consists of a polymer or a polymer mixture. The aim of the invention is to produce membranes, especially planar membranes or hollow fiber membranes that have an as high a separation efficiency as possible while simultaneously having a high membrane efficiency. To this end, the membrane has a gas- or liquid-permeable bicontinuous foam structure with orifices in the interior whose diameters do not exceed 500 nm.

The invention relates to a temperature compensation method of an SAW (surface acoustic wave) high-temperature pressure sensor based on vertical-horizontal stress adjustment. The method is characterized in that: based on the optimal selection of SAW sensitive substrate cut, the traditional planar membrane structure is optimized and designed into a structure that the back surface is an inner cylindrical surface. In the invention, by reasonably designing the geometric dimensions of the membrane such as diameter, thickness, radius of the cylindrical surface and the like, the distribution state of the aspect ratio of the surface stress is controlled, and the frequency-temperature characteristic of an SAW resonator on the surface of the membrane is changed, so that the frequency-temperature characteristic of an SAW device is basically kept constant within a relatively wide range of temperature and pressure and a better temperature compensation effect in a scope of wide temperature and wide range is realized.

The invention belongs to the technical field of packaging materials, and relates to a double-sided medium-free printing air bubble film and a preparation device and method thereof. The main structureof the air bubble film comprises a second planar film, a bubble face film, a first planar film and a printing layer; the bubble face film is located between the second planar film and the first planarfilm, the printing layer is located on the inner surface or the outer surface of the first planar film, the printing layer is firmly and clearly attached, a printing medium layer is omitted, and thematerial consumption is small. According to the preparation device, the first planar film with the printing layer and the double-layer single-sided air bubble film can be bonded into a whole, finally,a three-layer double-sided air bubble film with a printing layer directly printed on the surface is formed, the three-layer double-sided air bubble film medium-free printing effect is achieved, and the problem that a traditional printing device cannot directly print a three-layer double-sided air bubble film can be effectively solved. The preparation device is low in production input cost, advanced in preparation device, capable of saving a large number of human resources, reducing use of film raw materials and reducing energy consumption. The operation process is simple and the application environment is friendly.

An acoustical bass absorber which reduces peak and dip frequency response errors caused by interference from naturally occurring axial standing waves in rectangular rooms. The apparatus uses two forms of simple harmonic resonance: pistonic diaphragm resonance and Helmholtz cavity resonance. The pistonic diaphragm resonance is achieved by attaching a rigid planar membrane to metal springs. The Helmholtz cavity resonance is achieved by constructing an enclosed chamber attached to an open cylindrical tube. Coupling these two dissipation devices leads to several-fold improvement in absorption and total room mode attenuation.

The invention relates to a large span low electromagnetic loss planar membrane structure. The large span low electromagnetic loss planar membrane structure comprises a membrane assembly, the membraneassembly comprises a middle membrane assembly, an edge membrane assembly on the edge part and corner membrane assembly on the corner part, the middle membrane assembly, the edge membrane assembly andthe corner membrane assembly are all correspondingly composed of a membrane material, an edge rod, a corner connecting part and a pressed membrane plate, after the membrane materials on the middle membrane assembly, the edge membrane assembly and the corner membrane assembly are bent by 90 degrees around the edge rods, the membrane materials are compressed and fixed to the grooves in the edge rodsthrough the pressed membrane plates and pressed membrane bolts, the edge rods are connected with the corner connecting parts through bolts, the corner connecting parts of the middle membrane assembly, the edge membrane assembly and the corner membrane assembly are connected through intermediate node flanges or edge node flanges, and support trusses are arranged on the back surfaces of the membrane assemblies. The large span low electromagnetic loss planar membrane structure has the advantages that the large span low electromagnetic loss planar membrane structure can be adapt to the plate form, the proportion area of a steel support skeleton is small, the structure is stable, and the transparency of electromagnetic signals is good.

The invention provides an apparatus and method for testing powder properties. The apparatus has a sample holder with a planar membrane supported therein. The sample holder is mounted in a housing in a manner to allow relatively free vibrations. A quantity of powder or powder blend is placed on the membrane and the housing and sample holder are subjected to vibration, causing segregation. The powder is transferred to a split tablet die for compaction and the compacted tablets are tested for component uniformity.

The invention pertains, at least in part, to a method for forming an ordered structure of amphiphilic molecules, such as proteins. The method includes contacting a population of amphiphilic molecules with a interface; compressing said population laterally to an appropriate pressure, such that an ordered structure at the interface is formed. The invention also pertains to the two- and three-dimensional ordered structures that are formed using the planar membrane compression method of the invention.

The invention relates to a wind field test device for a planar membrane window. The wind field test device comprises a base, wherein an upper surface of the base is provided with a test frame assembly; an air shield is fixed on the test frame assembly; a left end of the air shield is connected with a fan through an air pipe; the fan is connected with a motor; a right end of the air shield is hermetically and fixedly connected with a planar membrane window; an outer side of the planar membrane window is provided with a rope A and a rope B which are intersected; one end of the rope A and one endof the rope B are connected to a tension sensor after passing through a pulley assembly, the other end of the tension sensor is fixed on the test frame assembly; the other ends of the rope A and therope B are connected to a rope fixing shaft of a tension device assembly after passing through the pulley assembly; a support shaft is connected between the test frame assembly and the base; a side face of the air shield is provided with an air outlet and an air pressure sensor interface; and the air pressure sensor interface is connected with an air pressure sensor. The wind field test device hasthe advantages of simple structure, convenience in use, low test cost, and low test field requirement.

A membrane device is presented that can used for a wide range of applications from once-through filtration, crossflow filtration, molecular separation, gas / liquid absorption or reaction, gas dispersion into liquid, and degassing of liquid. The device comprises a thin flat sheet membrane that allows certain fluid or molecules go through while blocking others. The membrane sheet is fixed on a supporting structure with mini channel on two sides of the membrane for respective feed and sweep flows. The membrane sheet is sealed with gaskets with two cover plates that the membrane sheet can be replaced or cleaned. The cover plate provides connection ports to connect the feed fluid to the feed channels on one membrane surface and to connect the sweep fluid to the sweep channels on the other surface of the membrane.