Patent application number | Description | Published |
20090139875 | ELECTROLYTE FOR ELECTRO-CHEMICAL MACHINING OF METAL PRODUCT - Disclosed is an electrolyte for electrochemical machining of a metal product, which can reduce a defect of an electro-chemical machining product, increase a lifespan of an electrolyte and an electrode, and improve efficiency of the electrochemical machining. The electrolyte includes an inorganic salt and at least one of a complexing agent and a reducing agent in a solvent. | 06-04-2009 |
20090314653 | Electrode tool for electrochemical machining and method of manufacturing the same - Disclosed herein is a highly-durable electrode tool for electrochemical machining, which can prevent the corrosion and abrasion of a conductive pattern at the time of electrochemical machining for forming dynamic pressure-generating grooves of a fluid dynamic bearing, and a method of manufacturing the same. The electrode tool for electrochemical machining includes: an electrode substrate on which a conductive pattern is formed to have protrusions corresponding to the fine grooves and to which negative current is applied; a nonconductive insulating layer, covering an entire top surface of the electrode substrate excluding the conductive pattern; and a conductive layer, which is formed on the conductive pattern to protect the conductive pattern, and a top surface of which is the same height as a top surface of the nonconductive insulating layer. | 12-24-2009 |
20100005662 | Method of manufacturing hydrodynamic bearing - Disclosed herein is a method of manufacturing a hydrodynamic bearing in which a metal bearing made of sintered metal powder is internally subjected to chemical etching, to form hydrodynamic pressure grooves thereon, thus assuring a high-precision and reliable hydrodynamic bearing. The method includes: compressing metal powder that is a raw material of the bearing in a press unit, and sintering the compressed metal powder at a predetermined temperature, thus preparing a sintered bearing; removing foreign substances adhering to the sintered bearing through a deburring process, and pressing the sintered bearing into a desired shape; forming a hydrodynamic groove, configured to generate hydrodynamic pressure, on an internal surface of the shaped bearing using chemical etching; and conducting a post treatment of cleaning the bearing including the hydrodynamic grooves thereon and drying the bearing. | 01-14-2010 |
20110280509 | SPINDLE MOTOR - Disclosed herein is a spindle motor. The spindle motor includes a rotating shaft and a sleeve. The rotating shaft has a stepped portion in a fluid dynamic pressure shafting system. The sleeve is fitted over the circumferential outer surface of the rotating shaft. A sleeve recess is formed in the inner surface of the sleeve so that the edges of the stepped portion are spaced apart from the sleeve. | 11-17-2011 |
20120014629 | Porous hydrodynamic bearing - There is provided a porous hydrodynamic bearing including a sleeve supporting a shaft, wherein the sleeve is formed of a sintered body containing at least one metal powder selected from a group consisting of SUS 304, SUS 430, and iron (Fe). In the sleeve formed of the sintered body containing at least one metal powder selected from the group consisting of SUS 304, SUS 430, and iron (Fe), surface pores and inner pores are not in communication with each other, whereby a leakage phenomenon of dynamic pressure may be reduced, as compared to a sleeve made of an alloy of Cu and Fe in which opened pores are formed. | 01-19-2012 |
20120091842 | Hydrodynamic bearing assembly and motor including the same - There is provided a fluid dynamic bearing assembly including: a hub coupled to a shaft and rotating together with the shaft; a sleeve supporting the shaft and including a storage groove formed in an upper surface thereof to thereby store oil between the sleeve and the hub; and a protrusion part protruding from one surface of the hub corresponding to the upper surface of the sleeve, allowing the oil to be sealed between the protrusion part and the sleeve, and having an oil interface formed in an outer radial direction thereof. | 04-19-2012 |
20120104889 | Spindle motor - There is provided a spindle motor including: a sleeve including a hollow part having a shaft inserted thereinto and rotatably supporting the shaft; a thrust plate coupled to a lower portion of the shaft in an axial direction to thereby rotate together with the shaft; a cover plate coupled to a lower portion of the sleeve in the axial direction and covering the hollow part; and a step part stepped upwardly from a lower surface of the thrust plate in the axial direction so that the shaft and the thrust plate are easily coupled to each other and having surface roughness greater than that of other portions of the thrust plate. | 05-03-2012 |
20120217832 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - Disclosed herein are a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve supporting a shaft; and a sleeve housing combined with the sleeve to prevent the leakage of oil; and at least one stepped part formed on at least one of the sleeve and the sleeve housing in order to align an axis of the sleeve with an axis of the shaft and provide a bonding space with the sleeve therebetween. | 08-30-2012 |
20120301879 | NOVEL USE OF CA-125 - Provided is novel use of CA-125. As it is discovered that CA-125 level are positively associated with bone mineral density, thereby CA-125 can be used in biomarker to diagnose osteoporosis or osteopenia, or extent of growth plate development. | 11-29-2012 |
20120306303 | SPINDLE MOTOR - Disclosed herein is a spindle motor including a rotating part including a rotating shaft, a hub, and a magnet and a fixing part including a sleeve supporting the rotating shaft and an armature opposite to the magnet, wherein a working fluid is injected between the rotating shaft and the sleeve so as to form a fluid dynamic bearing part, and the sleeve is as a sintered sleeve by sintering and a top and a bottom of an inner peripheral surface of the sleeve is protruded toward the rotating shaft, whereby the spindle motor improving dynamic pumping capability and extending a span of a radial bearing part to a top end and a bottom end of the sleeve as compared with the spindle motor according to the prior art can be provided. | 12-06-2012 |
20120306307 | MOTOR - There is provided a motor including: a stationary member including a core having a coil wound therearound and generating rotation force; and a rotating member including a magnet facing the coil so as to be rotatable with respect to the stationary member, wherein the rotating member rotates while descending by thrust dynamic pressure directed downwardly in an axial direction and generated in the rotating member when power is applied to the coil. | 12-06-2012 |
20130039609 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly capable of increasing a storage amount of oil and preventing evaporation or leakage of the oil by increasing a length of a sealing part, and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve supporting a shaft such that an upper end of the shaft protrudes upwardly in an axial direction; a sleeve housing provided to enclose an outer peripheral surface of the sleeve, and forming an oil interface between an inner peripheral surface thereof in an outer diameter direction and a main wall part protruding downwardly in the axial direction from a rotor case inserted into the upper end of the shaft; and a cover member provided in lower portions of the shaft and the sleeve and coupled to the sleeve housing while having a clearance therebetween. | 02-14-2013 |
20130067897 | EXHAUST MANIFOLD - An exhaust manifold includes: an inlet portion which collects exhaust gas discharged through a first to a fourth exhaust ports; an outlet portion discharging the exhaust gas; and a tube portion connecting the inlet and the outlet portions. The inlet portion comprises: a first inlet portion one end of which communicates with the first and the second exhaust ports; and a second inlet portion one end of which communicates with the third and the fourth exhaust ports. Since the inlet portion is provided as two considering the combustion sequence, the productability and the economic feasibility can be enhanced, and the surrounding space can be enlarged to enhance the workability, and a simple exterior appearance can be obtained, and interference between exhaust gases can be effectively prevented, and since the size of the exhaust manifold can be increased, an engine load can be reduced to improve the fuel mileage. | 03-21-2013 |
20130078400 | MOLD FOR MANUFACTURING SLEEVE AND SLEEVE MANUFACTURED BY USING THE SAME - There are provided a mold for manufacturing a sleeve capable of improving product quality by preventing damage in an edge of a mold used for manufacturing a sintered type sleeve, and a sleeve manufactured by using the same. The mold includes: a housing mold having a hollow part formed therein, a closed lower end, and a pillar standing at a center thereof in order to form a shaft hole of a sleeve; and a pressing mold pressing sintering powder after the housing mold is filled with the sintering powder, thereby allowing the sintering powder to be sintered in a sleeve shape, wherein the pressing mold has an outer inclined surface formed along an edge portion of an outer diameter of a front end thereof and a step portion formed at an outermost portion of the outer inclined surface. | 03-28-2013 |
20140054995 | FLUID DYNAMIC BEARING ASSEMBLY AND MOTOR HAVING THE SAME - The fluid dynamic bearing assembly of including: a sleeve formed to have a hollow into which a shaft is inserted; a sleeve housing formed to insert the sleeve therein; a bypass passage formed to axially communicate the upper portion and the lower portion of the sleeve between the sleeve and the sleeve housing and dispersing pressure of a lubricating fluid in the hollow; an oil sealing cap having an oil passage communicated with the bypass passage and taper-sealing the lubricating fluid within the oil passage; and a thrust plate formed to have a hole corresponding to a shape of the outer peripheral surface of the shaft and axially disposed under the sleeve. | 02-27-2014 |
20140112152 | LIMITED FEEDBACK METHOD AND APPARATUS FOR TWO-WAY WIRELESS RELAYING CHANNELS WITH PHYSICAL NETWORK CODING - A limited feedback method and apparatus for two-way relay channels with physical network coding are disclosed. An embodiment of the invention provides a method of providing parameters as feedback to two terminals according to channel conditions by a relay for two-way communication in a two-way relaying system using PNC (physical network coding). This method includes: (a) quantizing phase difference information of two-way channels of the two terminals in consideration of whether or not a ratio of a minimum distance between constellation points is periodic according to modulation level; and (b) transmitting feedback information, which contains at least one of the phase difference information and the power control information of the two terminals, as a limited number of bits to the two terminals. Here, the number of bits for the phase difference information or the number of bits for the power control information is determined according to the modulation level. | 04-24-2014 |
20140158281 | METHOD FOR MANUFACTURING MANIFOLD FOR FUEL CELL - A method for manufacturing a manifold for a fuel cell with a multilayer structure by injection-molding individual manifolds, each having welding projections and welding guides, and bonding the injection-molded individual manifolds by vibration welding includes arranging welding projections of an upper individual manifold and welding guides of a lower individual manifold to be engaged with each other while maintaining a uniform gap between each other to bond a plurality of individual manifolds in an up and down stacking structure, pressing the lower individual manifold upward, and applying vibration to the upper individual manifold in the left and right direction, thus bonding the upper and lower individual manifolds. Among the welding projections of the upper individual manifold, a non-horizontal welding projection whose longitudinal direction does not coincide with the vibration direction of the individual manifold has a variable height. | 06-12-2014 |
20140294167 | TERMINAL, SERVER, AND METHOD FOR ACTIVELY PROVIDING INFORMATION BASED ON COMMUNICATION CONTENTS - A terminal for actively providing information based on communication contents of a communication session. The terminal comprises a display unit that divides at least one of a schedule, Apps, REC, information regarding a matter of interest, and a contact into categories and displays, according to the categories, at least one of information regarding a communicator's matter of interest, schedule-related information, address book information corresponding to name information within a subscriber address book, first information relating to Apps within the subscriber terminal, and one or more App driving icons corresponding to the first information that are extracted from communication contents for at least one of a subscriber and a communication opponent in the communication session. | 10-02-2014 |
20140307410 | BOARD ASSEMBLY - A board assembly includes: a circuit board; a shield member coupled to the circuit board to face the circuit board; and at least one socket for a storage medium which is mounted on the circuit board. The shield member includes an opening that exposes the entirety of the socket to the outside. The board assembly forms an opening in a dual recess structure to accommodate the socket. Thus, the board assembly may contribute to the reduction of the thickness of an electronic device while being stacked with a battery. Further, the entire socket is exposed to the outside of the shield member, the storage medium may be easily removed. | 10-16-2014 |