104results about How to "Uniform section" patented technology

In a process for the thermal cracking of hydrocarbons in the presence of steam, the charge mixture is passed through externally heated tubes with helical inner fins, and to make the temperature in the tube wall and over the tube cross section more uniform, as well as to reduce the deposition of pyrolysis coke on the tube inner wall, a swirling flow is generated in the gas mixture and is gradually merged into a core zone with a predominantly axial flow at increasing radial distance from the fins.

A blade for use with a vertical-axis wind turbine rotates about a vertical axis thereof along a circular blade path of travel. The blade includes a structural frame connecting to a blade support member of the wind turbine and supports loads acting on the blade. A semi-rigid skin at least partially covers the structural frame and connects thereto with a connector. The skin forms a longitudinally cross-section of the blade that has a water droplet shape-like contour defining a symmetry axis thereof, and extends between a wide convex leading edge of the blade and a narrow trailing edge thereof. The present invention also refers to the wind turbine and to a wind turbine assembly.

The invention relates to a method for preparing a polyacrylonitrile carbon fiber precursor. The method comprises the following steps of: copolymerizing acrylonitrile and copolymerization components in multicomponent solution so as to form polymer spinning stock solution which has a relatively uniform and controllable molecular structure, performing demonomerization on the spinning stock solution,defoaming, filtering, and preparing the polyacrylonitrile carbon fiber precursor by a dry-jet wet-spinning process. The key technology of the method is that: a gas storage box is arranged on a dry wet spinning pack, the gas storage box and the liquid level of coagulating bath fluid form a dry-jet wet-spinning air layer into a confined space, and ammonia is persistently aerated into the space to carry out gas-liquid reaction with spinning solution trickle in the air layer. The polyacrylonitrile precursor prepared by the method has regular sections and few defects, the density is not less than 1.187g/cm<3>, the density after carbonization is not less than 1.79g/cm<3>, the strength is not less than 5.1GPa, and the modulus of elasticity is 280 to 300GPa.

The invention discloses a system and a method for continuous extrusion production of a fine-grain magnesium alloy strip. The system comprises a decoiling emptying device, an on-line straightening device, an on-line heating device, a continuous extrusion device, a cooling device and a winding displacement collection device. Through control of a temperature of a rod, a good extrusion driving force is produced between the rod and an extrusion wheel groove. Through an expansion mold cavity and a flow-blocking mold, magnesium alloy expansion flowing in a width direction is realized. In order to extrude a plate having larger width, the system adopts a two/three rod feeding-type extrusion mode so that joining and intermetallic welding of multiple rods in a corresponding multi-rod mold cavity are realized. The system and the method have the advantages that a process route is short; production efficiency is high; a grain refinement degree of a product microstructure is high; plate formability is good; and a continuous production line provided by the invention is suitable for industrial application.

A composite system includes a first component, for instance of metal, and a second component extending at least partly through the first component along an imaginary longitudinal axis of the composite system. The second component contacts, with an at least partially curved, especially cylindrical, outer surface, an inner surface of the first component flushly such that the first component at least sectionally, at least partly, grips around the second component. Joining surfaces of the composite system, which are formed by the mutually contacting surfaces of the two components, are formed in such a manner that the two components exhibit contour portions in the area of these joining surfaces embodied as self-closing, peripheral surfaces. The contour portions fit at least partly into one another, to form a mechanical interference locking effective, at least in part, likewise in the direction of the longitudinal axis. Additionally, the second component, with its outer surface, contacts the inner surface of the first component flushly, such that the two components are mechanically tightly connected together also by means of a frictional locking effective at least partly in the direction of the longitudinal axis. Alternatively, or in supplementation thereof, at least one of the components is subjected at least partly to lastingly elastic, especially mixed plastic-elastic, deformations. The composite system is distinguished by a high pull-out strength, even in the presence of repeatedly arising vibrations in one of the components and is, therefore, especially suited also for use in a vibration-type measurement pickup.

The invention relates to the field of a technique for producing a titanium-copper compound wire. The invention has the technical proposal that the technique comprises the following steps: selecting a titanium or titanium alloy pipe in proper dimensions meeting the national standard as a sleeve pipe (1); selecting a copper rod matching the dimensions of the titanium pipe as a rod material (2); penetrating the rod material (2) into the sleeve pipe (1), and attaching the rod material (2) to the sleeve pipe (1) by using an explosion compounding method to make a titanium-copper compound rod and form a titanium-base compound layer (3); and swaging the titanium-copper compound rod, and drawing to make the titanium-copper compound wire. The titanium-copper compound wire has the advantages of high bond strength, high surface smoothness and high quality of finished products. The invention changes the current unfavorable situation that the high-quality titanium-copper compound wire in China still highly depends on import, and enjoys favorable economic benefits.

Porous acrylic fibers produced by a method comprising subjecting a spinning dope containing 0.3 to 20 parts by weight of poly(vinyl acetate) relative to 100 parts of an acrylic copolymer to a wet spinning to give fibers, crimping and cutting the fibers, subjecting the resultant fibers to a treatment by hot water at 90 to 100° C. for 30 to 120 minutes or by saturated steam at 90 to 130° C. for 10 to 90 minutes to thereby form porous fibers; and a pile fabric having pile portions which comprise the porous fibers in an amount of 3 wt % or more, and, in the pile fabric, respective single fibers are visible being separate and emphasized, and thus the pile fabric has an appearance being highly decorative and excellent in design characteristics.

The disclosure relates to a watering mat for the large-area distribution of water, particularly in horticulture and landscaping as well as agriculture, comprising a first and a second carrier layer to accommodate elements of the watering mat, one or more connections for connecting the first and the second carrier layers, one or more water-feeding elements arranged between the first and the second carrier layers for feeding water into the watering mat and distributing water through the watering mat, an absorption layer for water storage arranged between the first and the second carrier layers and means for detecting the moisture level in the watering mat.

The present invention provides a vegetation trimmer (10) comprising: a motor (20) having a motor output shaft (30); a cutting head (22) for cutting vegetation presented thereto; a gear mechanism (26, 34, 36, 38) for transmitting power from said motor output shaft (30) to said cutting head (22), the gear mechanism having a step-down gear ratio for reducing the rate of rotation of said cutting head (22) relative to the rate of rotation of said motor (20), said gear mechanism comprising a pinion wheel (34) mounted on the motor output shaft (30); and a fan (28) also mounted on the motor output shaft (30); wherein the gear mechanism (26, 34, 36, 38) further comprises an internal gear wheel (26) engaging with the pinion wheel (34) and connected to the cutting head (22), whereby the cutting head (22) rotates in the same direction (B) as the fan does (D) during operation of the motor (20).

A log for a log home has a plurality of pockets formed within the body of the log. The pockets are filled with foam to enhance the thermal rating of the log.

Disclosed herein is a rear projection display apparatus including, a screen, a projection mirror, a video apparatus for projecting a picture, an optical unit including a projection lens, a light source, a drive and control circuit, and a structure body for holding the screen, the structure body having, a frame body formed from an extruded metal member, and a reinforcement member formed from a sheet metal, the frame body including, a bottom frame constituting a bottom surface, left and right side frames erected at both ends on the front side of the structure body, of the bottom frame, and a top frame bridgingly disposed between the upper ends of the left and right side frames, and the reinforcement member including, at least a frame support for connecting between the bottom surface of the bottom frame and the right side frame, or connecting between the bottom surface of the bottom frame and the left side frame.

A method of manufacturing a flow cell with a cell housing having a bore for the passage of sample, and with an inner layer of a totally reflecting polymer material for guiding radiation through the bore for the analysis of the sample, comprises the steps of: a) providing a tube of the polymer material in the bore of the cell housing, and b) applying a force on the walls of the tube from the interior of the tube for pressing the walls of the tube against the cell housing. The force may be applied by any suitable means, for example by drawing a mandrel through the interior of the tube, or by using pressurized gas or liquid. The resulting flow cell has a smooth inner surface with improved optical properties.

The invention relates to a wiper blade for cleaning panes, especially for cleaning the panes of a motor vehicle. The inventive wiper blade (10) comprises an elongated, rubber-elastic wiper strip (14) that is placed against the pane (22) and that is mounted on an elongated elastic support element (12) so that its longitudinal axis is parallel thereto, a device (16) for connecting the wiper blade to a driven wiper arm (18) being directly linked with said support element. The support element (12) comprises two strip-like spring bars (28, 30) that are disposed in a plane in front of the pane and substantially parallel thereto. The lower strip surfaces (13) of the spring bars face the pane, and the adjacent inner longitudinal edges (48) thereof, at a distance (34) to one another, dip into a longitudinal groove (54, 56 or 106) that is associated with every longitudinal edge and that is open towards the longitudinal face of the wiper strip (14). The lower strip surfaces are interlinked by at least two transverse connectors (36, 38) that are arranged in the longitudinal direction at a distance to each other. The wiper blade can be produced in a more economical way if every transverse connector (36, 38) has a center section (42) that extends at a distance (44) t o the upper strip surfaces (11) of the spring bars (28, 30), thereby forming bridging connectors, the distance (34) between the two longitudinal bars (28, 30) being smaller than the bridge width (46).

A sling construction is provided that includes an improved support strap for more uniformly distributing the weight of the supported arm of the wearer's shoulder while preventing strap bunching and creep. The strap is preferably formed from an elastomer or a rubber that is relatively compliant yet has a low coefficient of elongation. This allows the strap to be highly supportive of the sling while also conforming to the contour of the wearer's neck and shoulders in a manner that makes the strap and sling comfortable to wear. The inner contact surface of the strap includes nubs or raised features that prevent the strap from sliding. Further, the improved strap support construction may be used in a modular fashion in conjunction with standard sling pouches or with an enhanced sling pouch in order to greatly improve the performance and appearance of the sling.

Provided is a radiation distribution system for distributing the radiation from an illumination system to two or more patterning means, each for patterning beams of radiation, which are subsequently projected onto a substrate.

A disposable ultrasonic handpiece that contains a transducer and a connecting body that tapers to a surgical blade in a single piece. The housing that surrounds the ultrasonic transducer does not require waterproofing for repeated autoclaving. Also, the electrical cord that provides power to the transducer is made of very inexpensive wire, along with a low-cost electrical connector. By making the blade, connecting body with a protective sheet and transducer as a unit with an electrical terminal at the proximal end, they can be plugged and unplugged from a socket and electrical cord in the housing of the handpiece. Thus, only the unit needs to be disposed of after a procedure, making the disposable part of the handpiece even less expensive. The low-cost, disposable handpiece can be packaged along with additional disposable items that are required for one of several types surgeries.

In an apparatus in spinning preparation for separating foreign objects at conveying equipment for fibre material, at least one separation device is associated with the conveying equipment. The separation device comprises an arrangement for producing a blast of air that flows in the direction onto the conveying equipment and generates an air flow that detaches the foreign objects from the conveyed fibres and carries them away. The arrangement comprises a plurality of blast nozzles arranged across the width of the conveying equipment and connected to a compressed air pipe and to valves. To reduce the proportion of good fibres in the waste in a simple manner, and to allow a more selective action of the blast air current, a bar member for mounting the blast nozzles is present and the nozzles are integrated in the bar member.

A mould for a composite component having a fillet joint, the mould including a mould body having a cavity within which the component is formed, and an insert mating with the mould body and including a forming surface against which, in use, the fillet of the component fillet joint is formed. The insert may be thermally insulating and highly rigid. A method of forming a composite component having a fillet joint using a mould, the method including forcing a surface of the fillet region of the component to adopt a non constant radius of curvature while the component is inside the mould during the cure process is also provided. Additionally, a method of forming a composite component having a fillet joint that is defined between first and second legs the method including placing the legs of the component in bending during cure of the component is described.

The invention discloses an ampoule bottle opener. The ampoule bottle opener comprises an upper box body and a lower box body which can be opened and closed through hinging, wherein a supporting platform is arranged in the lower box body; accommodating holes with various dimensions and used for placing ampoule bottles are formed in the supporting platform; a tray capable of freely rotating, a control circuit board, a lithium battery electrically connected with the control circuit board and a power supply port used for charging are arranged on the bottom of any accommodating hole; a cutting mechanism for forming physical scratches on bottle necks of the ampoule bottles and a heating mechanism are arranged in the upper box body; and the heating mechanism is powered and heated through the control circuit board. According to the ampoule bottle opener disclosed by the invention, tensile stress is formed on a specified position of each ampoule bottle through cutting, heating and cooling, so that the ampoule bottles can be broken by applying relatively small shearing stress by hands, and broken sections are flat, uniform and smooth; and the problems that medicament and liquid medicine arewasted as the whole ampoule bottles are broken, and potential safety hazards are caused to medical staff are fundamentally solved.

Method and apparatus for dispensing a fluid using a dispensing container employing an airless pump, which may employ abstract or non-cylindrical shapes. The airless pump uses a chamber enclosing a fluid with a piston comprising a surface of the chamber. The chamber has an interior volume with a substantially uniform cross section along a height of the chamber, to which the piston is conformed allowing the piston to transverse the height of the chamber. The gaps between the piston and the interior of the chamber are sealed with a multi-lobe ring seal.