226 results about "Cavity size" patented technology

A membrane for implantation in soft tissue comprising a first domain that supports tissue ingrowth, disrupts contractile forces typically found in a foreign body response, encourages vascularity, and interferes with barrier cell layer formation, and a second domain that is resistant to cellular attachment, is impermeable to cells and cell processes, and allows the passage of analytes. The membrane allows for long-term analyte transport in vivo and is suitable for use as a biointerface for implantable analyte sensors, cell transplantation devices, drug delivery devices, and / or electrical signal delivering or measuring devices. The membrane architecture, including cavity size, depth, and interconnectivity, provide long-term robust functionality of the membrane in vivo.

The invention provides materials, devices and methods for marking biopsy sites for a limited time. The biopsy-marking materials are ultrasound-detectable bio-resorbable powders, with powder particles typically between about 20 microns and about 800 microns in maximum dimension, more preferably between about 300 microns and about 500 microns. The powders may be formed of polymeric materials containing cavities sized between about 10 microns and about 500 microns, and may also contain binding agents, anesthetic agents, hemostatic agents, and radiopaque markers. Devices for delivering the powders include tubes configured to contain the powders and to fit within a biopsy cannula, the powders being ejected by action of a syringe. Systems may include a tube containing powder, and a syringe containing sterile saline. The tube may be configured to fit within a biopsy cannula such as a Mammotome® or SenoCor 360™ cannula.

The invention provides materials, devices and methods for marking biopsy sites for a limited time. The biopsy-marking materials are ultrasound-detectable bio-resorbable powders, with powder particles typically between about 20 microns and about 800 microns in maximum dimension, more preferably between about 300 microns and about 500 microns. The powders may be formed of polymeric materials containing cavities sized between about 10 microns and about 500 microns, and may also contain binding agents, anesthetic agents, hemostatic agents, and radiopaque markers. Devices for delivering the powders include tubes configured to contain the powders and to fit within a biopsy cannula, the powders being ejected by action of a syringe. Systems may include a tube containing powder, and a syringe containing sterile saline. The tube may be configured to fit within a biopsy cannula such as a Mammotome® or SenoCor 360™ cannula.

Anchoring systems for use in cavity wall structures having an inner wythe and an outer wythe constructed of rubble stone are disclosed. The anchoring system employs an anchor fastened to or set within the inner wythe that extends into the cavity and connects to a J-hook. A vertically adjustable veneer tie enwraps the J-hook, limiting lateral movement and front-to-back displacement, and is set within the bed joint of the outer wythe. The anchoring system minimizes cavity size and provides stability for an uncoursed outer wythe equivalent to that of anchoring systems for standards coursed bed joints.

The invention discloses a calixarene additive capable of simultaneously and optionally reducing benzo (a) pyrene and phenol contents in cigarette smoke and an application method thereof. In the invention, deep-cavity P-(1-(4-hydroxyphenyl)-1-methylethyl) calyx (8) aromatic compound is selected as the additive material, and the compound is added in a common and conventional filter tip which bettercan be suitable for a compound filter, with the additive amount being arbitrarily adjusted according to the needs. By using the molecular recognition function and the cavity size select effect of thecalyx (8) aromatic compound, the additive can be optionally combined with the benzo (a) pyrene and phenol molecules in the cigarette smoke. When the additive is added into the filler with the amount of 10mg / per cigarette, 33.2 percent of benzo (a) pyrene content and 41.4 percent of phenol content in the cigarette smoke can be simultaneously reduced, and other chemical compositions in the smoke arebasically not influenced, thus achieving the goal of selective harm reduction.

In embodiments of the present invention, a biodegradable / biodegradable polymer film may be used as a scaffold for tissue engineering scaffolds for engineering organized organs, such as vascular grafts, for example. In one embodiment, an ultraviolet (UV) resin made from a diacrylated biodegradable oligomer is molded into a flexible scaffold having cavities and / or channels. Channel / cavity size may be on the order of micrometers and / or nanometers, and thus the walls may have high aspect ratios. Smooth muscle cells may be deposited in the channels and because of the high aspect ratios, the cells may align along the channels / cavities as confluence is reached.

The invention relates to a sensing method and a device for micro inner cavity size and three-dimensional coordinate based on two-dimensional micro-focus collimation, belonging to the technical filed of precise instrument manufacture and measurement, in particular to a sensing method and a device for micro and complex inner cavity size and three-dimensional coordinate in the filed of sub-macroscopy, which is especially suitable for the three-dimensional detection of blind holes with large depth-diameter ratio. The device combines a micro spherical biconvex lens and an optical fiber probe measuring rod, and establishes a point light two-dimensional micro-focus collimation imaging light path by using the micro spherical biconvex lens, thereby realizing the high magnification and the sensing for the three-dimensional displacement of the optical fiber probe measuring rod by utilizing the light path. The invention has the characteristics of small measured force of a single optical fiber probe, easy miniaturization, large measured depth-diameter ratio, simple system structure, good real-time performance, easy practical application, and has obvious advantages for carrying out the quick and ultra-precise measurement and calibration for the inner cavity micro-size and the three-dimensional coordinate. Especially, the top of the resolution capability can reach the deep sub-nanometer magnitude, and an absolute zero position exists in the three-dimensional measurement direction.

An intrinsically safe video inspection system intended for use in a Class I, Zone 0 area is capable of visually surveying hazardous area locations; where the potential for fire or explosion exists because of gases, dust, or easily ignitable fibers in the atmosphere. The intrinsically safe camera of the present invention has the distinct ability to be used all areas that require increased safety and works in various hazardous environments, allowing users the ability to remotely view and inspect various mines, silos, and storage tanks. The inspection system includes a low power, high 3.2 megapixel resolution camera with digital zoom capability that allows for the close inspection and examination and utilizes an LED fiber light pipe for illumination needs. The video inspection system of the present invention provides for the illumination in various cavity sizes, while reducing the risk of unintended accidents.

Anchoring systems for use in cavity wall structures having an inner wythe and an outer wythe constructed of rubble stone are disclosed. The anchoring system employs an anchor fastened to or set within the inner wythe that extends into the cavity and connects to a J-hook. A vertically adjustable veneer tie enwraps the J-hook, limiting lateral movement and front-to-back displacement, and is set within the bed joint of the outer wythe. The anchoring system minimizes cavity size and provides stability for an uncoursed outer wythe equivalent to that of anchoring systems for standards coursed bed joints.

The invention provides a forming process of a curved composite tube. The forming process comprises the following steps of: manufacturing a forming die; preparing prepregs; laying up the prepregs; assembling the die; curing; and de-molding. The forming process has the beneficial effects that a closed and combined hard die is utilized as the forming die, a silicon rubber flexible die is utilized asthe inner cavity of the curved composite tube, and the size of the silicon rubber flexible die is determined by means of the forming pressure and the swelling property of silicon rubber, which solvesthe difficulties of the curved composite tube such as difficult de-molding process and difficult control of the cavity size of the product and ensures that the size of the inner cavity meets the requirements after the formed product is smoothly de-molded; the integral informing technology is adopted so as to solve the difficulties of extension positions at two sides of the curved composite tube such as difficult pressurization, difficult control of overall quality and the like, thus achieving the purpose of one-time forming of the product and meeting the requirements for dimensional precision; and by means of layering design and forming process control of a composite material, the problem of easiness in deformation of the formed curved composite tube is solved so as to meet the requirements for accuracy control of the product. The curved composite tube formed by the forming process has the advantages of better structural quality, higher performance, higher dimensional precision and higher curvature forming precision.

The invention discloses a contact type temperature non-inductive three-dimensional detection sensor based on a fiber Bragg grating (FBG) and belongs to the technical field of precision instrument manufacturing and precision test measurement. The sensor comprises a broadband light source system which consists of a pump laser, a wavelength division multiplexing (WDM) coupler, an erbium-doped fiber and a beam splitter, a temperature compensation system which consists of an erbium-doped fiber amplifier (EDFA), a first circulator, a guide pipe, a reference FBG and a fiber barrier, a probe, and a signal receiving system which consists of an optical spectrum analyzer, a fiber coupler and an index-matching fluid, wherein the reference FBG of the temperature compensation system is arranged in a spatial distance of 30 cm of the probe. By the sensor, three-dimensional sensing is realized, and the environmental adaptability of the sensor is greatly improved. The sensor has the characteristics of simple structure and high real-time performance and is easy to practically use. The sensor has the advantage of quick and ultra-precise measurement and calibration of small cavity size.

The invention discloses a single-substrate integrated terahertz front end. The single-substrate integrated terahertz front end comprises a dielectric substrate, an inputting waveguide micro-strip transition and a micro-strip air cavity; the micro-strip air cavity is the air cavity; the inputting wave micro-strip transition (a standard waveguide opening WR-15), a CMRC (compact microstrip resonant cell) structure micro-strip low-pass filter, a parallel double-frequency-doubling diode, a frequency-doubling matching branch knot, a local oscillator band-pass filtering device, a frequency-mixing matching branch knot, a frequency-mixing diode, a radiofrequency waveguide micro-strip transition (a standard waveguide WR-2.2) and an intermediate-frequency low-pass filtering device are sequentially arranged on the single-substrate integrated terahertz front end from left to right. The number of dielectric substrates is reduced; circuits are integrated on the substrate; the number of machined cavities is also reduced; the single-substrate integrated terahertz front end is easy to machine and assemble; designing and machining on the waveguide transition are reduced; and the size of the cavity is also reduced.

The invention provides a swelling pressure composite forming method for a large-section-difference special-shaped section pipe fitting and relates to a forming method for a large-section-difference special-shaped section pipe-shaped part. The swelling pressure composite forming method comprises the main steps that 1, the perimeters and the equivalent diameters of a plurality of cross sections on the to-be-formed large-section-difference special-shaped section pipe fitting are determined, and the structure of a swelling pressure composite forming mold and the inner cavity size and initial position of a side extrusion mold are determined; 2, an equal-diameter circular-section pipe blank with a certain length is cut and put into the swelling pressure composite forming mold; 3, the equal-diameter circular-section pipe blank is filled with a pressure medium with a certain pressure through a pressure medium inlet, and a variable-diameter circular-section pipe blank is obtained through swelling; 4, the side extrusion mold is driven to extrude the variable-diameter circular-section pipe blank, and the large-section-difference special-shaped section pipe fitting is obtained; and 5, the pressure is released, and after the swelling pressure composite forming mold is opened, the formed pipe fitting is taken out. The swelling pressure composite forming method is used for forming large-section-difference special-shaped section pipe fittings.

The invention relates to a visualized grouting test device and a visualized grouting test method of a fractured rock mass. Due to the arrangement of a CT (Computerized Tomography) scanning device, a whole-course visualized grouting test on a true fractured rock mass can be realized; by adding a specific proportion of barium sulfate into cement slurry, the problem of contrast imaging of grouting slurry in the true fractured rock mass under CT scanning is solved; a test box and a grouting anchor rod are made of transparent materials, thereby further improving the accuracy of a scanning result; the test box is set to be of an inner cavity size-adjustable structure, test pieces with different sizes can be tested, and the influence of grouting pressure size on a movement diffusion rule of the slurry in a rock mass fracture is obtained by comparing visualized grouting test results of all groups of test pieces under the same grouting time; by remotely controlling the starting and stopping of a CT machine and the opening and closing of a grouting valve through an integrated control panel, non-intermittent matching between test piece grouting and CT scanning is realized, the influence on slurry diffusion caused by CT scanning intervals is reduced to the greatest extent, and the whole grouting test process can be visualized.

A convection oven is disclosed. The convection oven comprises a housing having an oven cavity and an oven door for access to the oven cavity, at least one air blower for generating heated air, one or more air channels for directing the heated air from the air blower toward the oven cavity, and one or more removable air plenums, wherein each removable air plenum is connected to one of the one or more air channels, comprises an air intake edge for receiving the heated air from the air channel, defines the top or the bottom of a cooking chamber within the oven cavity, and comprises a plurality of air vents for directing the heated air into the cooking chamber. The convection oven may further comprise a control panel for separately and independently controlling each of the cooking chambers defined by the removable air plenums.

A washer holding device for temporarily retaining nonmagnetic washers being applied to a building material surface with a fastener gun comprises an arm for affixing the washer holding device to a fastener gun and a washer receptacle joined to the arm. The washer receptacle includes a contacting end, a washer receiving cavity, and a central aperture, with the contacting end defining a distal end of the washer holding device and the cavity sized to receive a nonmagnetic washer such that the washer is temporarily retained within the cavity via a friction fit. An embodiment may include a shoulder, such as an annular flange, recessed from the contacting end, with the shoulder adapted to contact the surface of a deformable building material to limit the depression of the washer receptacle into the building material. The arm may be of various configurations for use with different style fastener guns.

The invention discloses a terahertz subharmonic frequency doubling and mixing device based on a monolithic integrated circuit. The device comprises a fundamental wave input waveguide micro-strip transition, a CMRC structure local oscillator low-pass filter, a frequency doubling matching circuit, a four-die frequency doubling diode, a local oscillator matching circuit, a frequency mixing diode, a radio frequency matching circuit, a radio frequency input waveguide micro-strip transition, and a CMRC structure intermediate frequency low-pass filter. According to the terahertz subharmonic frequency doubling and mixing device based on the monolithic integrated circuit, on the one hand, the number of dielectric substrates is decreased, and circuits are integrated on one substrate, so that the number of cavities to be processed is decreased, and processing and assembling are easy; on the other hand, waveguide transitions to be designed and processed are reduced, and the cavity size is reduced.

The invention relates to a gas injection and production method for a communicating well salt cavern gas storage. The gas injection and production method comprises the steps that communicating wells communicating with the communicating well salt cavern gas storage are divided into a gas injection and production well and a brine injection and discharge well. When gas is injected into the gas storage, natural gas is injected into the gas storage through the gas injection and production well, the natural gas drives brine from top to bottom, and the brine in the gas storage is discharged through the brine injection and discharge well. During gas production of the gas storage, brine is injected into the gas storage through the brine injection and discharge well, the brine drives natural gas frombottom to top, and the natural gas in the gas storage is extracted through the gas injection and production well. When gas is not injected in or produced from the gas storage, a certain amount of natural gas is reserved in the gas storage, fresh water or light salt water is injected into the gas storage through the gas injection and production well, brine is formed after rock salt is dissolved bythe fresh water or the light salt water, and the brine is discharged through the brine injection and discharge well. The problems that the cavity size of the salt cavern gas storage is easy to reduce, the backing gas proportion is large, and the construction period is long are solved, and safe and efficient operation of the communicating well salt cavern gas storage is achieved.

A beverage container holder for holding a beverage can or bottle comprising: a mug and a beverage container securing system. The mug includes: an inner cylindrical cavity sized to receive a beverage container; and a cylindrical shell. The cylindrical shell is composed of: an inner layer; a middle layer composed of a substantially liquid impermeable material and substantially enclosing the inner layer; and an outer layer substantially enclosing the middle layer. The mug also includes: a base member and a handle member. The beverage container securing system includes: a hole disposed through the cylindrical shell; and a tab coupled to the cylindrical shell, substantially covering the hole, including an adhesive material on the tab's inner side. The beverage holder also includes a first and second split along the cylindrical shell and a folding system. The folding system includes a first, second, and third crease which allow users store multiple holders.

The display stand assembly for a tablet computer or the like has a support structure and a device holder assembly secured to the support structure. The device holder assembly includes a housing which defines an insert cavity sized larger than the device. At least one insert is positionable within the insert cavity and defines a device cavity sized to receive the device. A face plate with an optional separate frame is securable to the housing over the insert(s) and device, to secure the device and show the display screen while denying physical access to parts of the device. In one alternative embodiment, at least one mounting plate is provided in the housing, and each insert is positionable in any one of a number of positions on the mounting plate(s), thus permitting standardization of the inserts regardless of the electronic device being used. The insert(s) may include a platform which is adjustable in height to accommodate different device thicknesses.

The present invention is monodisperse silica coated hollow magnetic microsphere and its preparation process and belongs to the field of nanometer magnetic material technology. Superparamagnetic nanometer ferrite particle is first prepared in coprecipitatin method and monodisperse polymer microsphere with surface functional radical is synthesized in emulsion polymerization; the superparamagnetic nanometer ferrite particle and the monodisperse polymer microsphere is then compounded by means of coordination effect, and the compound is coated with silica; and the composition particle is finally calcined at 500-700 deg.c for 5-12 hr to produce the silica coated hollow magnetic microsphere. The present invention has simple preparation process and controllability of the granularity and cavity size of the magnetic microsphere, and the magnetic microsphere has high chemical and colloid stability and may be used in biological detection and other fields.

An injection molding system is disclosed having a self-regulating valve for balancing melt flow. The self-regulating valve includes a control rod configured to balance the melt flow rate through a hot runner system. The self-regulating valve reacts to an injection or melt pressure within the hot runner system and a pre-set force provided by an external force device. The self-regulating valve is an open-loop system as it requires neither a measurement of pressure by a sensor nor feedback from a processor in order to regulate the melt flow. The self-regulating valve mechanically reacts to changes in melt pressure on control surfaces thereof by “bobbing” upwards / downwards to decrease / increase the melt flow accordingly. The self-regulating valve compensates for conditions that affect melt pressure, such as an increase / decrease in melt viscosity, changes in melt temperature, and / or mold cavity size without the use of a processing device.

The invention discloses a method for preparing ultra-fine grains by repeatedly upsetting extrusion and large deformation, belonging to the technical field of ultra-fine crystal material preparation. The method comprises: two dies different in size of die cavities are combined; the repeatedly upsetting extrusion and deformation process of stocks in the two dies are realized by controlling the die cavity size of the dies and the deformation size of the stocks; finally the inner microstructures of the stocks are changed into the ultra-fine grains to obtain block materials of the ultra-fine grains. The repeated and polydirectional upsetting extrusion and deformation not only conduce to the refining of the grains but also conduce to the repeated deformation of the two dies, realize large deformation of the stocks and are characterized in that the upsetting extrusion and deformation are suitable for diverse materials and have simple process. Owing to low manufacturing cost and excellent property, the method has strong market competitiveness and popularization and application value.

Provided is a method for the formation of particulate compounds of selectable size characteristics, which method includes supporting a slurried particulate precursor on a porous support; heating the support such that aggregates of the particulate compound are formed, and desagglomerating the aggregates into their component particulate. In a preferred embodiment, an aqueous slurry of alumina particulate which has not undergone the alpha transition is contacted with a porous support having defined pore and cavity sizes, such that the slurry occupies at least some of the interstices of the porous support. The slurry and support are heated such that the alumina precursor slurry undergoes the alpha transition. The alpha alumina product is then particulated. The support is of such a material that it is either lost through combustion during heating or otherwise removable after heating, such as during or after particulation, without destroying the particle characteristics imparted by the porous support. Additionally, in a further embodiment, co-components are added to the slurry in order to impart desired properties to the particulated product.

The invention provides a system and method of testing complex dielectric constant of a material based on a gradient coaxial resonator. The system comprises the gradient coaxial resonator and a coupling device. The method comprises the steps: 1) testing and recording resonant frequency f0 and quality factor Q0 in a corresponding cavity working mode when no sample is loaded; 2) measuring diameter DSand thickness dS of a sample under test, placing the sample in a sample area, and testing and recording resonant frequency fS and quality factor QS in the corresponding cavity working mode when the sample is loaded; 3) using resonator perturbation theory to calculate complex dielectric constant of the material under test. The system and method have the advantages that high-precision testing of complex dielectric constant at normal temperature is achieved for a microwave dielectric material, required cavity size and sample size for low frequency testing can be reduced, a sealed-bottom tube clamp can also be used to test the complex dielectric constant of liquid and powdery materials.

The invention discloses a mould for extruding aluminum alloy. The mould comprises a flow guide mould and a section mould, which are arranged at the front and the back along a fluid direction, wherein the corresponding cavity sizes of the flow guide mould and the section mould are designed according to parts, the flow guide mould consists of a sinking table and a transition cavity, the sinking table is in an inner cone structure, the front end of the transition cavity is in a counter bore structure, the diameter size of the counter bore structure is less than the diameter of an external circle, the rear end of the counter bore structure further adopts a broadsiding structure, and a connection place between the cavity and the flow guide mould is in an inverted cone structure. The mould disclosed by the invention has the beneficial effects that the flow guide mould of the side broadsiding of the first counter bore is designed, an ingot is peeled by the side broadsiding of the first counter bore, the extrusion force and broadsiding pre-deformation can be reduced, the high-precision forming can be carried out by the inverted cone section mould, and the extrusion force can be further reduced as well as the tissue can be further improved.

The invention provides a narrow-high long-big box style structural beam, comprising upper cover plates (1), web plates (2), inner-cavity clapboards of the structural beam (3) and lower cover plates (4). A plurality of process support rods (6) are arranged inside the inner cavity of the structural beam and connected with the web plates through spot welding. The assembling method of the structural beam is as follows: the clapboards and the web plates are fixed by spot welding as well as the web plates and the process support rods; the gaps caused by the spot welding between the clapboards and web plates are filled through welding; the symmetric welding is carried out from the middle part to two ends of the structural beam on the vertical direction and the multi-layer and multi-strip welding is adopted according to the size of welding angles; then the upper cover plates and lower cover plates are respectively fixed on the upper and lower ends of the web plates and clapboards through spot welding; and then welding seams are filled and the multi-layer and multi-strip welding is adopted according to the size of welding angles. The structural beam can avoid the falling or rising of the web plates so as to guarantee the inner cavity size of the structural beam, the parallelism of the web plates and the rigid on each direction and the assembling method is simple.

The invention discloses a double passband differential filter having a laminated substrate integration waveguide structure. The filter includes a medium substrate, an upper surface metal layer, a middle metal layer and a lower surface metal layer. A metallization through hole array penetrating through the medium substrate is arranged in the medium substrate. Six substrate integration waveguide cavities are defined by the metallization through hole array, the upper surfaced metal layer, the middle metal layer and the lower surface metal layer. The center frequency of the two differential passbands is obtained through adjusting upper layer cavity dimension parameters. At the same time, the middle metal layer is etched with an H-type coupling slot line. Through adjusting the size and the position of the slot line, a demanded coupling index is obtained, so that better frequency response is achieved. According to the invention, a second difference module passband is obtained by utilizing a substrate integration waveguide high order mode, the size of the filter is reduced effectively. Besides, through adjusting the position or the size of the metal etching slot line in the lower surface, common mode rejection and inter-band isolation are improved.

A tool that enables the forming of a hole in irrigation pipe, and the placement of an emitter device into that formed hole, includes a pair of elongate plier half-members connected at a pivoting joint. A first jaw includes an inwardly-directed hole punch member, while the second opposed jaw includes an inwardly-directed concavity to engage a piece of irrigation hose, such that closure of the jaws causes the hole punch to pierce a hole in the irrigation pipe. The jaw ends each include semi-cylindrical cavities sized to hold the cylindrical body of an emitter, to facilitate forcible insertion of the spike of the emitter into the hole previously formed in the irrigation pipe.

A highly-coherent chip-based laser generating system includes a disk resonator incorporating a wedge structure fabricated from a silicon dioxide layer of a chip. The disk resonator is operable to generate a highly-coherent laser from a low-coherence optical pump input provided at an optical power level as low as 60 μW. The disk resonator is fabricated with sub-micron cavity size control that allows generation of a highly-coherent laser using a controllable Stimulated Brillouin Scattering process that includes matching of a cavity free-spectral-range to a Brillouin shift frequency in silica. While providing several advantages due to fabrication on a chip, the highly-coherent laser produced by the disk resonator may feature a Schawlow-Townes noise level as low as 0.06 Hz2 / Hz (measured with the coherent laser at a power level of about 400 μW) and a technical noise that is at least 30 dB lower than the low-coherence optical pump input.