790results about How to "Uniform diameter" patented technology

A dual action biopsy needle scrapes tissue of cellular thickness from a lesion during proximal-to-distal travel of the needle along its longitudinal axis of symmetry. A first sharp edge, formed by a beveled distal end of the needle, scrapes tissue during proximal-to-distal travel of the needle. A transversely disposed slot formed in the needle near the first sharp edge provides a second sharp edge. A bottom of the slot is proximal to the opening of the slot. The second sharp edge also scrapes tissue during proximal-to-distal travel of the needle. The second sharp edge is coincident with an exterior surface of the needle. A vacuum pulls the scraped cellular material into the lumen of the needle.

This invention is a preparation method of calcium sulfate crystal whisker. The material is plaster stone (CaSO4.2H2O) and water in the entire production. After raw material preparation, building up reactions, dehydrate, refine and edulcoration. Its characteristic is that the active content of plaster stone up to above 95%, the whiteness is above 90%. Mixed with water and turn into plaster stone slime, then put them into reactor to make them have chemical reaction, then on the other procedures. The calcium sulfate crystal whisker made by this method has good performance, low cost, and can be used in all kinds of industries.

A controller for use with a guidewire, such as a vascular guidewire, provides a mechanism for gripping and applying a torque to the guidewire without the need to thread the guidewire axially through the controller and at a location close to a point of access of the guidewire. In one embodiment, the controller includes a side-access, multi-part assembly including a collett or other gripping element that applies a uniform radially inward force on the guidewire. In another embodiment, for use with guidewires having active electrically controllable elements, the controller integrally or removably incorporates a switch or other mechanism to initiate an energized state. The controller thereby permits, among other advantages, ergonomic, single-handed control of an electronically steerable guidewire, including axially displacing, torquing and steering the guidewire.

A nanodevice including a nanorod and a method for manufacturing the same is provided. The nanodevice according to an embodiment of the present invention includes i) a substrate; ii) at least one crystal that is located on the substrate and includes a plurality of side surfaces forming an angle with each other; and iii) at least one nanorod that is located on the crystal and extends along a direction that is substantially perpendicular to a surface of the substrate

A method for manufacturing an ultrafine carbon fiber of the present invention has several steps as follows. In the first step, a semiconductor film is formed over a surface having insulative. In the second step, a first treatment is performed so that a metal element or a silicide of the metal element is segregated on a crystal grain boundary of the semiconductor film after adding the metal element in the semiconductor film. In the third step, a second treatment is performed so that an ultrafine carbon fiber on the surface of the metal element or the silicide of the metal element is formed.

The method for preparing nanometer carbon fiber / foam coal through taking coal liquefaction residues as raw materials belongs to the scientific and technological field of coal materials of the scientific and technological branch of inorganic non-metallic materials. The method takes the coal liquefaction residues as the coal source of the foam coal, and compounds metallic / foam coal compound materials through the supercritical foaming method or the formwork method, and prepares the nanometer carbon fiber / foam coal compound materials through the chemical vapor deposition of organic matter. The method fully utilizes the characteristics of metallic accelerating agent containing abundant coal organic matter, iron-contained compound and the like in the coal liquefaction residues, and prepares metallic / foam coal compound materials, and the nanometer carbon fiber completely covers on the surface of the foam coal after the chemical vapor deposition. The novel nanometer carbon fiber / foam compound materials have the structural characteristics of solid foam and hollow nanometer carbon fiber. And the method is expected to be used in the fields of catalyzer and a catalyzer carrier, a fuel battery electrode material, high-effective sorbent of a fixed bed reactor and the like.

Methods and devices for negating scale buildups on interior surfaces of a sliding sleeve valve housing above the flow tube. In some aspects, a wiper member provides additional clearance between the flow tube and housing to compensate for scale buildup. In other aspects, the interior surface of the valve housing is provided with a sleeve that is disposed between the interior surface of the valve housing and the general flowbore passing through the valve housing to protect the interior surface against scale buildup.

A dissolving water making unit and a bubble generating unit are provided. The dissolving water making unit includes a gas dissolving device for dissolving gas in water. The bubble generating unit includes a bubble generating nozzle and a bubble generating cartridge. The dissolving water making unit sucks water from a water source, and sucks gas to make dissolving water from a mixed solution in which the water and the gas are mixed together. The dissolving water is obtained by dissolving the gas in the water. The bubble generating unit generates microbubbles from the dissolving water supplied from the dissolving water making unit. The gas dissolving device includes a closed vessel; an inflow port which is provided in the closed vessel, and which is provided for causing the mixed liquid sucked from the source to flow into the closed vessel; an exhaust valve which is provided in an upper portion of the closed vessel, and which is provided for exhausting excess gas from the mixed liquid; and an outflow port which is provided near a bottom portion of the closed vessel, and which is provided for causing the dissolving water to flow out from the closed vessel to the bubble generating unit. Between the inflow port and the outflow port, the closed vessel has a retention region in which the dissolving water flows slowly, in which air is dissolved in the dissolving water to substantial saturation, and in which the dissolving water hardly contains fine bubbles. A hair washing device includes a hair washing bowl having an opening portion in which a head region can be accepted. The bubble generating unit is attached to a lower portion of the hair washing bowl. In an upper portion of the hair washing bowl, an exhaust port for exhausting water from the hair washing bowl is provided.