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 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.

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.

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 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 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.

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.