The invention relates to a nanofiber web preparing apparatus and method via electro-blown spinning. The nanofiber web preparing method includes feeding a polymer solution, which is a polymer dissolved into a given solvent, toward a spinning nozzle, discharging the polymer solution via the spinning nozzle, which is charged with a high voltage, while injecting compressed air via the lower end of the spinning nozzle, and collecting fiber spun in the form of a web on a grounded suction collector under the spinning nozzle, in which both of thermoplastic and thermosetting resins are applicable, the solution does not need to be heated and electrical insulation is readily realized.

Manufacturing device and the method of preparing for the nanofibers via electro-blown spinning process

A constant-velocity universal joint (1, 31, 61) provided with an outside joint member (2, 32, 62), an inside joint member (3, 33, 63) arranged within the outside joint member (2, 32, 62), and a torque-transmitting member (4, 34, 64); a track groove (7, 9, 37, 39, 66) in which a rolling surface of the torque- transmitting member (4, 34, 64) engages being formed on the outside joint member (2, 32, 62) and/or the inside joint member (3, 33, 63), wherein the constant velocity universal joint is characterized in that at least one of the structural members of the constant velocity universal joint (1, 31, 61) comprises a metallic sintered body, the relative density of the metallic sintered body is equal to or greater than 80% and less than 100%, a layer hardened by heat treatment is formed on the surface of the metallic sintered body, and annular structural members comprising a metallic sintered body are subjected to cold-rolling.

Constant velocity universal joint

Heat conducting laminates and laminated heat conducting devices having at least one layer of metal (80) and at least one layer of polymer matrix composite material (82, 84) having low-thermal-expansion reinforcing material (90) distributed throughout and embedded therein. The coefficient of thermal expansion and the thermal conductivity of the laminated heat conducting devices are defined by the metal in combination with the polymer matrix material and the low-thermal-expansion reinforcing material in the laminate. The coefficient of thermal expansion and thermal conductivity of a heat conducting device can be controlled by bonding at least one layer of metal to at least one layer of polymer matrix composite material having low-thermal-expansion reinforcing material distributed throughout and embedded therein. In one embodiment, the laminated heat conducting device comprises a plurality of alternating layers of aluminum and epoxy resin having graphite fibers distributed throughout the epoxy resin.

Low thermal expansion,heat conducting laminates having layersof metal and reinforced polymer matrix composite

The present invention relates to an expandable implant for engagement between vertebrae generally comprising an inner member, outer member, and gear member positioned coaxial with respect to each other such that the inner and outer members are moveable relative to each other along an axis. The gear member is axially fixed to the outer member and freely rotatable with respect to the outer member and the gear member threadedly engages a threaded portion of the inner member to translate inner member along the axis. The implant is configured to engage the vertebrae in a predetermined alignment and the gear member includes gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter of the implant device.

Expandable Vertebral Implant

A metal matrix composite comprises randomly-­oriented inorganic oxide fibres of density below 3 g/ml embedded in a metal matrix material such as a light metal, for example aluminium or magnesium or an alloy thereof. In a particular embodiment the fibres are of density l.8 to 2.5 g/ml and preferably are of mean diameter from 2 to l0 microns. The composite can be made by liquid infiltration of a fibre preform comprising the fibres bound together with an inorganic or an organic binder or by extrusion of a mixture of the fibres and a powdered metal matrix material.

Fibre-reinforced metal matrix composites

Improved fiber-reinforced metallic composite material includes as a matrix a metal or alloy of aluminum, magnesium, copper, nickel or titanium and as a reinforcing material an inorganic fiber of 15 to 70% by volume, which is characteristic in that the metal alloy composing the matrix contains 0.05 to 10% by weight of lead or a combination of 0.05 to 10% by weight of lead and 0.01 to 5% by weight of one or more metals selected from the group consisting of sodium, potassium, calcium, strontium, cesium, barium and radium. The composite material has improved mechanical strength, particularly tensile strength, and is useful as a material for various parts and devices in various industrial fields such as the aerospace, atomic power and automobile industries.

Fiber-reinforced metallic composite material

A drive shaft made of fiber reinforced plastic includes pipe made of fiber reinforced plastic to which a fitting is connected. A connecting portion of the fiber-reinforced resin-made pipe and a connecting portion of the fitting engage each other through the bite of serrations formed on the outer side or inner side of the fitting, with a film, e.g., a metallic foil, being interposed therebetween.

Method of making a drive shaft made of fiber reinforced plastic with press-fit metallic end fittings

A drive shaft made of fiber-reinforced plastics comprising a pipe made of fiber-reinforced plastics to which a fitting is connected, in which a connecting portion of the pipe and a connecting portion of the fitting engage each other through bite of serrations formed on the inner or outer surface of the connecting portion of the fitting into the connecting portion of the pipe, with the space between the pipe and the fitting at the biting sites being filled with an adhesive.

Drive shaft made of fiber reinforced plastics, and method for connecting pipe made of fire-reinforced plastics

A process for preparing a fiber-reinforced metal composite material which comprises (1) combining an inorganic fiber comprising alumina as the main component and silica as the secondary component with an aluminum alloy containing at least one of copper, silicon, magnesium and zinc as the secondary component at a temperature of not lower than the melting point of said alloy to make a composite, (2) subjecting said composite to solid solution treatment, (3) quenching the treated composite and (4) optionally tempering the quenched composite at a temperature of from 100 to 250° C.

Aluminum alloy reinforced with silica alumina fiber

A fiber-reinforced metal composite material comprising a metal or alloy as the matrix and an inorganic fiber as the reinforcing material, characterized in that at least one element selected from the group consisting of tin, cadmium and antimony in the form of simple substance or organic or inorganic compound is incorporated into the matrix metal in an amount of 0.0005 to 10% by weight (calculated in terms of the element) so as to enhance the mechanical strength of the composite material.

Kohji Yamatsuta

Papers

Fiber-reinforced metallic composite material

Method of making a drive shaft made of fiber reinforced plastic with press-fit metallic end fittings

Drive shaft made of fiber reinforced plastics, and method for connecting pipe made of fire-reinforced plastics

Aluminum alloy reinforced with silica alumina fiber

Fiber-reinforced metal composite material