Patents by Inventor Hideaki Maeda

Hideaki Maeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8932746
    Abstract: A separator for non-aqueous rechargeable lithium batteries and a non-aqueous rechargeable lithium battery including the separator are provided. The separator includes a separator body and a composite including an organic compound and an inorganic compound supporting the separator body, where the organic compound has a higher melting point than that of the material composing the separator body, and the inorganic compound includes an element selected from the group consisting of 1A, 2A, 3A, 4A, 3B, and 5B elements from the periodic table, and combinations thereof, and at least one moiety selected from the group consisting of oxides, hydroxides, carbonates, phosphates, sulfates, nitrates, alkoxides, and combinations thereof.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: January 13, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hideaki Maeda, Masaki Koike, Hironari Takase, Geun-Bae Kim
  • Publication number: 20140247016
    Abstract: A method for activating lithium ion batteries related to the initial formation cycle (initial battery break in prior to use) is used to improve battery performance. The method involves charging the battery for the first time after being fabricated, to an initial voltage Vi that is above 4.25 Volts vs Li/Li+, but less than 5 Volts. The battery is discharged to a base voltage Vb that is from 4.15 to 4.25 Volts and held at Vb for a period of time that is at least one minute to at most several weeks. The battery is then charged to a final voltage Vf that is greater than Vb. The batteries activated by the method may have one or more improved properties such as longer cycle life, greater capacity at higher charge/discharge rates or consistent performance from battery to battery.
    Type: Application
    Filed: February 26, 2014
    Publication date: September 4, 2014
    Inventors: Alan L. Stottlemyer, Hideaki Maeda, Koichi Numata
  • Patent number: 8717708
    Abstract: Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: May 6, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Mao Nishiyama, Shuji Nishida, Hideaki Maeda, Masafumi Mochizuki
  • Publication number: 20140069849
    Abstract: Provided are a particle separation device and a method of separating particles, each of which can easily separate particles for a short time without a great stress to the particles and easily collect the particles thus separated. The particle separation device includes at least: a separation flow path (i) to which a separation fluid and a particle group including two types of particles being different in density are supplied, and (ii) through which the separation fluid flows in a certain direction; a divergence section connected to at least an end of the separation flow path in the certain direction in which the separation fluid flows, a first flow path formed from the divergence section in a rising direction; and a second flow path formed from the divergence section in a falling direction, the separation flow path being formed in a horizontal direction.
    Type: Application
    Filed: August 19, 2013
    Publication date: March 13, 2014
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventors: Masaya MIYAZAKI, Daisuke SUGIYAMA, Kenichi YAMASHITA, Yuuki TESHIMA, Hiroyuki NAKAMURA, Hideaki MAEDA
  • Publication number: 20140066314
    Abstract: In a coated high-temperature superconducting wire 1 in which a superconducting yttrium-based wire (high-temperature superconducting wire) 2 having a rectangular cross section is coated by an insulating layer 6, the insulating layer 6 is an electrodeposited film made of block copolymerized polyimide which contains siloxane bonds in a polyimide main chain and which has molecules with anionic groups. A coil formed from the superconducting yttrium-based wire 2 is impregnated with epoxy resin, and the epoxy resin is cured. The coil is configured such that the epoxy resin is completely separated from the superconducting yttrium-based wire 2 by the insulating layer 6.
    Type: Application
    Filed: October 23, 2012
    Publication date: March 6, 2014
    Applicants: RIKEN, MITSUBISHI CABLE INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Hideaki Maeda, Masato Takahashi, Yoshinori Yanagisawa, Hideki Nakagome, Keita Oobuchi, Hiroyuki Kamibayashi
  • Patent number: 8521322
    Abstract: In automatic programming for creating a multi-path program for a machine having a plurality of control paths performing one or more machining processes of a machining program for machining a workpiece, the machining time of each of the machining processes is calculated, workable paths are input for each of the machining processes, and then workable orders of the machining processes are input. For each of the machining processes, simultaneously workable machining processes are input if any among other machining processes. On the basis of the above results, machining programs that provide the shortest machining time are selected.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 27, 2013
    Assignee: Fanuc Corporation
    Inventors: Hideaki Maeda, Shinya Nakamura
  • Patent number: 8440351
    Abstract: A rechargeable lithium ion battery including a positive electrode a positive active material and including a negative electrode having a negative active material. The positive active material includes a lithium-manganese-based compound core and a heat resistant polymer disposed on the lithium-manganese-based compound core. The heat resistant polymer has a glass transition temperature (Tg) ranging from about 80 to about 400° C. Alternatively, the positive active material may include a lithium-manganese-based compound core and an inorganic metal compound as well as the heat resistant polymer with a glass transition temperature (Tg) ranging from about 80 to about 400° C. disposed on the lithium-manganese-based compound core.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: May 14, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Won-Il Jung, Akira Takamuku, Hideaki Maeda, Naoya Kobayashi
  • Patent number: 8339749
    Abstract: Embodiments of the invention reduce generation of a magnetic field with a polarity reverse to that of the recording magnetic field, without deteriorating a gradient in the magnetic field. An embodiment of a magnetic disk device according to the present invention suppresses deviation and erase of already recorded data. In an embodiment, the perpendicular magnetic recording head includes the main magnetic pole, an auxiliary magnetic pole, a trailing shield disposed on the trailing side of the main magnetic pole with a non-magnetic film placed in-between, and side shields disposed on both the sides of the main magnetic pole in the direction of the track width with a non-magnetic film placed in-between. The trailing shield has on the trailing side a portion where film thickness is thinner on the trailing side than the thickness of its element in the height direction in its position facing the main magnetic pole.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: December 25, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Masafumi Mochizuki, Hideaki Maeda, Shuji Nishida, Takaaki Izumida
  • Patent number: 8248724
    Abstract: A method for re-injecting low density gas into a disk drive including a hermetically sealed disk enclosure. The method includes providing a disk drive including a hermetically sealed disk enclosure. In addition, the method includes re-injecting low density gas from a hole penetrating the hermetically sealed disk enclosure from an exterior of the disk drive to an interior of the disk drive. Moreover, the method includes covering the hole with a sealing label including a metal layer and an adhesive layer.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: August 21, 2012
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Takako Hayakawa, Yoshiyuki Hirono, Hideaki Maeda, Masaru Muranishi, Kouki Uefune
  • Patent number: 8248893
    Abstract: A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk. The head-slider includes a write element including a main pole configured to generate a magnetic-recording field from a pole tip of the main pole in a first localized portion of the magnetic-recording disk. The head-slider also includes a magnetic-recording assistance element configured to provide energy to a second localized portion of the magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of the magnetic-recording disk. A width of the pole tip of the main pole on a leading-edge side is wider than a width of the pole tip of the main pole on a trailing-edge side.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: August 21, 2012
    Assignee: Hitachi Global Storage Tecnologies, Netherlands B.V.
    Inventors: Masafumi Mochizuki, Hiroyasu Tanabe, Hideki Zaitsu, Hideaki Maeda
  • Patent number: 8227114
    Abstract: The method of preparing a negative active material for a non-aqueous electrolyte rechargeable battery includes mixing a vanadium compound and a lithium compound and then subjecting the mixture to first firing to obtain Li1.0(VxMy)1.0O2 having a layered halite type structure (where 0.5?x?1.0, 0?y?0.5, x+y=1, and M is selected from the group consisting of group 2 to 15 elements of the periodic table and combinations thereof); and adding a lithium compound to the Li1.0(VxMy)1.0O2 and then subjecting the resultant to second firing. The negative active material for a non-aqueous electrolyte rechargeable battery prepared according to the preparing method has high crystallinity, and excellent charge and discharge characteristics at a high rate.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: July 24, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tetsuo Tokita, Hideaki Maeda, Naoya Kobayashi, Sung-Soo Kim
  • Patent number: 8107180
    Abstract: A hard-disk drive. The hard-disk drive includes a magnetic-recording disk including tracks on which a plurality of patterned bit-cells that are isolated magnetically are aligned at predetermined alignment pitches. The hard-disk drive includes a magnetic-recording head which is configured to follow tracks, and to write and to read data. The hard-disk drive includes a signal-processing unit which is configured to generate a recording signal based on a write-clock signal with cycles corresponding to alignment pitches of patterned bit-cells, and to output a recording signal. The hard-disk drive includes a phase-detecting unit which is configured to detect a phase of the write-clock signal when the magnetic-recording head reaches an end point of a predetermined range. The hard disk drive includes a determination-processing unit which is configured to determine success of data writing based on a difference between an expected value and a detected value of the phase of the write-clock signal.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: January 31, 2012
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Shuji Nishida, Yasutaka Nishida, Masafumi Mochizuki, Hideaki Maeda
  • Publication number: 20120021299
    Abstract: A solid lithium ion secondary battery with high safety and high capacity, and an electrode for the solid lithium ion secondary battery. At least one of positive and negative electrodes of the solid lithium ion secondary battery includes a lithium salt of a cyclic imide compound.
    Type: Application
    Filed: June 23, 2011
    Publication date: January 26, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Hideaki MAEDA
  • Publication number: 20120021298
    Abstract: The positive electrode of a solid lithium ion secondary battery including a solid electrolyte and a positive active material that includes core particles and a coated layer at least partially covering the surfaces of the core particles. The core particles comprise a layered lithium composite oxide including a metal element having an oxidation number that remains constant during charging and discharging within a voltage range from about 2 V to about 5 V. The coated layer comprises a metal compound including a metal element having an oxidation number that remains constant during charging and discharging within a voltage range from about 2 V to about 5 V. The structure of the positive active material is stable over repeated charge and discharge cycles. Interfacial reaction between the positive active material and the solid electrolyte is suppressed. The solid lithium ion secondary battery has high output power and a long lifetime.
    Type: Application
    Filed: June 23, 2011
    Publication date: January 26, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Hideaki MAEDA
  • Patent number: 8089720
    Abstract: A hard-disk drive. The hard-disk drive includes a magnetic-recording disk in which tracks adjacent to each other are magnetically separated, a spindle motor which drives the magnetic-recording disk, a magnetic-recording head equipped with write element and read element, an actuator for positioning the magnetic-recording head on a predetermined track on the magnetic-recording disk, and a control unit. The control unit is configured to store information about an over-write-only track that is provided for a plurality of tracks including n consecutive tracks in at least a partial radial area of the magnetic-recording disk and an offset amount. In a radial area of the magnetic disk where the over-write-only track is located, the control unit is configured to record with an offset by an offset amount from a center of a track toward the over-write-only track with respect to n?1 tracks of the plurality of n tracks, excluding the over-write-only track.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: January 3, 2012
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Yosuke Urakami, Jun Ohno, Hideaki Maeda, Hiroyasu Tanabe
  • Publication number: 20110257781
    Abstract: In automatic programming for creating a multi-path program for a machine having a plurality of control paths performing one or more machining processes of a machining program for machining a workpiece, the machining time of each of the machining processes is calculated, workable paths are input for each of the machining processes, and then workable orders of the machining processes are input. For each of the machining processes, simultaneously workable machining processes are input if any among other machining processes. On the basis of the above results, machining programs that provide the shortest machining time are selected.
    Type: Application
    Filed: February 24, 2011
    Publication date: October 20, 2011
    Applicant: FANUC CORPORATION
    Inventors: Hideaki MAEDA, Shinya NAKAMURA
  • Patent number: 8018672
    Abstract: A magnetic recording device according to one embodiment includes a magnetic recording medium having a magnetic recording layer; a recording element positioned on a head slider; an assistance element for supplying assistance energy to an area on the recording layer to which a recording magnetic field generated by the recording element is applied, the assistance element being positioned on the head slider; and a controller for controlling a size of an assistance area from the assistance element in accordance with a position of the head slider in a radial direction of the magnetic recording medium. Additional systems and methods are also presented.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: September 13, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hideaki Maeda, Hiroyasu Tanabe, Masafumi Mochizuki, Hideki Zaitsu
  • Patent number: 8017235
    Abstract: In the present invention, the fine particle composite process is carried out with the step of reacting fine core particles and a raw material for coating layer by mixing them and continuously supplying a resulting mixture into a micro flow path. The micro flow path is specified to 1-4000 in Reynolds number. With this arrangement, the present invention ensures, in a technology using a reactor having a micro flow path, accurate control of reaction condition, uniformity of coating amount distribution, easy layer formation, and successive production of fine composite particles.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: September 13, 2011
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Hiroyuki Nakamura, Masato Uehara, Hongzhi Wang, Hideaki Maeda, Masaya Miyazaki, Yoshiko Yamaguchi, Kenichi Yamashita, Hazime Shimizu, Xyanying Li
  • Patent number: 7969678
    Abstract: In one embodiment, a magnetic disk drive includes a magnetic disk, a head slider for flying above the spinning magnetic disk, a pattern analyzer for analyzing a data pattern of data to be recorded on the magnetic disk to determine a recording current reversal timing and a recording assistance area in accordance with the analysis so that the rear end of the determined recording assistance area is shifted forward if the determined recording current reversal timing is earlier than a criterion, or the rear end of the determined recording assistance area is shifted backward if the determined recording current reversal timing is later than the criterion, a recording assistance element on the slider for forming the determined recording assistance area on the magnetic disk, and a recording element for recording the data on the magnetic disk using the recording current in accordance with the determined recording current reversal timing.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 28, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hiroyasu Tanabe, Hideaki Maeda, Hideki Zaitsu, Masafumi Mochizuki
  • Publication number: 20110096638
    Abstract: A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk. The head-slider includes a write element including a main pole configured to generate a magnetic-recording field from a pole tip of the main pole in a first localized portion of the magnetic-recording disk. The head-slider also includes a magnetic-recording assistance element configured to provide energy to a second localized portion of the magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of the magnetic-recording disk. A width of the pole tip of the main pole on a leading-edge side is wider than a width of the pole tip of the main pole on a trailing-edge side.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 28, 2011
    Inventors: Masafumi Mochizuki, Hiroyasu Tanabe, Hideki Zaitsu, Hideaki Maeda