993 results about "Tube forming" patented technology

A tubular tissue scaffold is described which comprises a tube having a wall, wherein the wall includes biopolymer fibrils that are aligned in a helical pattern around the longitudinal axis of the tube where the pitch of the helical pattern changes with the radial position in the tube wall. The scaffold is capable of directing the morphological pattern of attached and growing cells to form a helical pattern around the tube walls. Additionally, an apparatus for producing such a tubular tissue scaffold is disclosed, the apparatus comprising a biopolymer gel dispersion feed pump that is operably connected to a tube-forming device having an exit port, where the tube-forming device is capable of producing a tube from the gel dispersion while providing an angular shear force across the wall of the tube, and a liquid bath located to receive the tubular tissue scaffold from the tube-forming device. A method for producing the tubular tissue scaffolds is also disclosed. Also, artificial tissue comprising living cells attached to a tubular tissue scaffold as described herein is disclosed. Methods for using the artificial tissue are also disclosed.

A system for treating an occlusive region of a blood vessel comprises: a catheter outer tube forming a lumen for inflation of a centering balloon; a catheter inner tube lined with either internal spiral threads or point slots to assist controlled guidewire movement; and a rotatable guidewire that may be solid or hollow. The guidewire comprises a rotatable body and a proximal shaft. The rotatable body has two components: a distal rotating head and a proximal rotating shaft, wherein these components are of equal length and the rotating shaft resides within the proximal shaft. Linear force applied to the proximal shaft will result in the rotational guidewire tip puncturing cutting through an occlusion. In an alternative embodiment, the guidewire rotatable body comprises two mechanical rings and a compression spring, wherein when the spring is released via depression of a button, the guidewire tip drills through an occlusion.

An insert earphone device includes an electro-acoustic device, an inserting body, a sound tube connected between the electro-acoustic device and the inserting body and an active valve unit provided on the sound tube, the sound tube is formed with a sound propagation path open at both ends thereof to the electro-acoustic device and the inserting body and an external sound entrance open at both end thereof to environment and the sound propagation path, and the active valve unit is formed of electroactive polymer and responsive to voltage supplied through a cable so as to close and open the external sound entrance; when a user wishes to hear external sound, the user changes the polarity of voltage so that the active valve unit is deformed for conducting the environment to the sound propagation path, whereby the user hears the external sound without removing the earphone device from the ear.

A spectroscopic system for the analysis of small quantities of substances makes use for the purposes of energy transfer of cone-shaped aperture changers which are arranged in the object zone between the light source and the sample and, during absorption measurements, also between the sample and the inlet slot of a spectrometer. A microcell system is provided in the object space. The microcell system comprises a cylindrical cell tube with a hollow core for receiving a sample liquid. The cell tube and the sample liquid being adjustable with respect to the refractive index such that they act as a step waveguide for radiation, the sample liquid forming the core and the wall of the cell tube forming the sheath of the step waveguide.

The invention relates to a fiber mesh tape-wound and reinforced composite pipe, a preparation process and a device, belonging to the technical field of forming processes of composite pipes. The composite pipe comprises an inner-layer core pipe and a post-coated layer, as well as a fiber mesh tape arranged between two layers, wherein the inner-layer core pipe is extruded by a core pipe extruding machine, the adhesive resin fiber mesh tape is heated through a post-heating box, and the composite pipe is finally obtained by traction through a post-traction machine, sizing through a vacuum spraying and sizing box and the like. According to the composite pipe disclosed by the invention, the technology is adopted, the preparation process is simple, the existing tape plastic covering treatment process and the composite pipe forming process are combined into a whole, the number of workers for production is reduced, and the degree of automation is improved; furthermore, the used device is a conventional device, and the cost is reduced; and in addition, adhesive resin is firstly coated on the outer surface of the core pipe, and the plain woven fiber mesh tape is further wounded, so that the interface problem in the pipe is effectively solved, the mechanical properties of the pipe are upgraded and the stability of the pipe during long-term use is also improved.

An apparatus and method is disclosed for treating a liquid with a first and a second chemical. A liquid to be treated flows into a first inlet port of an intake manifold. A second inlet port of the intake manifold introduces a first chemical into the liquid. A first static mixing device comprising a spirally twisted tube forming a plurality of helixes and having an inlet port connected in fluid communication with an outlet port of the intake manifold is provided for mixing the first chemical with the liquid. The outlet port of the first static mixing device is connected to a first inlet port of an interconnecting manifold. A second inlet port of the interconnecting manifold introduces a second chemical into the liquid. A second static mixing device has an inlet in fluid communication with an outlet port of the interconnecting manifold for mixing the second chemical with the liquid and for eluting the treated liquid from an outlet port of the second static mixing device.

The invention provides glass applicable to electric light source, which belongs to the field of borosilicate glass, in particular to a high-precision small-diameter glass tube through a public known pull tube forming process by using an environment-friendly fining agent to realize good melting quality, so as to meet the requirement of electric light source mechanical light manufacture. The swell factor of the glass is (38-76) multiplies 10<-7>/DEG C to fulfill sealing of tungsten, molybdenum and raft. The glass consists of the following chemical compositions in weight percentage: 55 to 75 percent of SiO2, 5 to 22 percent of B2O3, 2 to 6 percent of Al2O3, 0 to 8 percent of MgO, CaO, BaO and SrO, 5 to 12 percent of Li2O, Na2O and K2O, 0 to 1 percent of ZrO2, 0.5 to 4 percent of TiO2, 0 to 2 percent of ZnO, 0 to 1 percent of SnO 2, and 0 to 0.5 percent of Cl2. The glass is characterized by the borosilicate glass system. The glass product has the advantages of high transmission of visible light, ultraviolet resisting property and insolation resisting property without harmful elements.

A manufacture method for an inner-fin tube includes a tube forming process for continuously forming a tube member joined at one end side thereof, an inner fin transferring process for continuously transferring an inner fin member, an inner fin twisting process for twisting the transferred inner fin member at at least two portions, and an inner fin inserting process for inserting the inner fin member into the tube member through the one end side thereof at the halfway stage of the tube forming process. At the inner fin twisting process, a transfer direction of the inner fin member is altered so that the inner fin member faces the one end side of the tube member and a longitudinal direction of a cross section (perpendicular to transfer direction thereof) of the inner fin member corresponds with a major axis direction of a flat cross section of the tube member.

An automated, continuous tube forming system comprising: a plurality of workstations which respectively perform various operations on a workpiece; an indexing transfer carousel having a plurality of workpiece-holding collets provided in a spaced arrangement around the periphery-circumference of the of the carousel and which are adapted to support a plurality of workpieces, respectively, the multiple workstations are provided around the indexing transfer carousel and the carousel is selectively rotated to move the collet-supported workpieces such that the workpieces are associated with the workstations where various operations can be performed on the workpieces; a loading device which loads workpieces on the indexing transfer carousel; a transfer device which unloads the finished workpieces from the indexing transfer carousel after processed at the workstations; and a controller which controls operations of the indexing transfer carousel, the workstations, the loading device, and the transfer device. Electrical power may be provided to the indexing transfer carousel via a movable type power connector such as a slip-ring connector, operations of the indexing transfer carousel, the workstations, the loading device, and the transfer device are continuously monitored using appropriate sensors, and the sensors communicate with the controller via wireless communication signals such as RF signals.

A solid particle medium thermal expansion forming method for a light alloy tubular component mainly includes: preheating a mould device and a heatproof solid particle medium; closing a mould and moving a lower pressure cover and a lower pressure head to set positions which are set according to tube blank length and heatproof solid particle medium filling size respectively; putting a tube blank in a cavity of the heated mould, and filling the heated heatproof solid particle medium into a cavity formed by the tube blank, the lower pressure cover and the lower pressure head; closing an upper pressure cover and an upper pressure head one after another, and continuing heating to reach a technical set temperature; loading the upper and lower pressure heads and pressure covers according to set paths to enable the tube blank to be transformed, so that a designed light alloy tubular component is achieved. The solid particle medium thermal expansion forming method for the light alloy tubular component is technically simple and convenient to control, low in input cost, environment friendly and free of pollution, light alloy hollow variable-section tubular components in complex shapes can be formed at one time, and tube forming limit can be further improved.

A solid oxide fuel cell comprises a tube forming an anode, electrolyte and cathode, and a catalytic substrate is positioned within the tube. Such solid oxide fuel cells are highly compact and lightweight, and can be used in portable applications.

A method of forming reinforced packages. The method can comprise forming an attached web by adhering a blank to a web of material and moving the attached web in a downstream direction through at least a tube forming assembly and a carton forming assembly. The method also can comprise at least partially forming a tube by folding at least a portion of the web of material as the attached web moves through the tube forming assembly, forming a reinforcement sleeve by folding at least a portion of the blank so that the reinforcement sleeve extends at least partially around the tube as the attached web moves through the carton forming assembly, and forming a reinforced package comprising the reinforcement sleeve and a tube portion by separating the tube portion from a remainder of the tube, the reinforcement sleeve being adhered to the tube portion.

A pipeline pressure testing assembly has a fitting defining a flow path and having a port on a wall of the fitting into which a pressure testing device is removably inserted along a central axis of the port for pressure testing. The port is circular, larger than the interior diameter of the pipeline and located at or above the tube forming the flow path through the fitting. The fitting has a recess encircling at least part of the flow path and opening to the port to receive the testing and sealing devices. The recess is formed by two opposing walls inclined relative to the central axis of the recess. The recess walls at the top of the flow path by the port are spaced apart a distance as large as the pipe diameter for cleanout and inspection. A tubular valve stem screws into the testing device and has a rotary valve blocking flow through the tubular valve stem. Flow through the fitting is blocked with the rotary valve closed and the tubular valve stem in a first position. Flow through the testing device is allowed with the rotary valve closed and the tubular valve stem in an open position. With the rotary valve open, flow through the tubular valve stem is permitted when the tubular valve stem is in either the first or second position to provide multiple drain and fill options.

A spiral flat tube heat exchanger comprising a first flat tube and a second flat tube thermally coupled to the first flat tube, the first flat tube and the second flat tube forming substantially concentric spirals. A first fluid flows through the first flat tube in a first flow direction, and second fluid flows through the second flat tube in a second flow direction. The flat tubes preferably contain microchannels to increase heat transfer efficiency.

A laryngeal mask including a dome and an airway tube extending from a proximal passage through the dome. The dome has a periphery about its base including at least one receptacle. An inflatable cuff of flexible material has a first longitudinal edge and a second longitudinal edge. The longitudinal edges are joined to form a tube forming the cuff. The cuff substantially encircles the periphery of the dome. The mask has at least one buttress adjacent to the periphery at a distal portion of the dome. The tube is fused adjacent the buttress of the dome, and the fusing is below a posterior surface of the dome wherein, upon deflation of the cuff, the buttress upturns the cuff to facilitate insertion of the laryngeal mask into a patient.