Patents by Inventor Takanori Yamazaki

Takanori Yamazaki 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: 7619857
    Abstract: Embodiments of the invention provide a magnetic disk device which lowers the cost, maintains reliability by compensating the thermal dent or protuberance caused by a change in the environmental temperature, makes it possible to increase the recording density by decreasing the floating amount of the slider, to increase the capacity of the device or to decrease the size thereof. In one embodiment, a magnetic disk device comprises a magnetic disk, a magnetic head slider, and a drive unit for moving the magnetic head slider, wherein an air stream is generated between the magnetic disk that rotates and the magnetic head slider to effect the recording or the reproduction in a state where the magnetic head slider is floating. The magnetic head slider includes a slider substrate portion and a thin-film head portion that has recording and reproducing elements, a metal film, and an insulating film formed on the slider substrate portion and constituting a slider-floating plane along with the slider substrate portion.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: November 17, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Masayuki Kurita, Toshiya Shiramatsu, Kimitoshi Etoh, Takanori Yamazaki
  • Patent number: 7569617
    Abstract: The object of the present invention resides in providing a method and instrument of polymer processing treatment, wherein a sudden pressure change due to expansion by gasification of a reactant when it is exhausted from a reacting extruder is given in a little amount to a molding machine for a treated substance, and a change in the amount of the material supplied to the molding machine and a variation in molding are little, and hence continuous and uniform molding is possible. That is, the method of the present invention resides in a method of polymer processing treatment, which includes the steps of: reacting a polymer with a reactant under mixing and stirring at a high temperature and a high pressure in the inside of a reacting extruder to produce the treated substance; introducing said treated substance and a remaining reactant into a reactant-separation tank to separate the treated substance and the reactant; and molding the separated treated substance.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: August 4, 2009
    Assignees: Hitachi, Ltd., The Japan Steel Works, Ltd., Hitachi Cable, Ltd.
    Inventors: Masaaki Mukaide, Toshiharu Goto, Takanori Yamazaki, Yoshihiko Iwamoto, Jun Kakizaki
  • Patent number: 7518818
    Abstract: Embodiments of the invention appropriately control the flying height of a magnetic head slider as necessary without making the magnetic head slider touch the magnetic disk. In one embodiment, when a magnetic disk drive is started, the level of electric power predefined for the ordinary temperature (room temperature) is read in from the internal memory of an MPU. A temperature sensor measures the internal temperature of the magnetic disk drive and sends it to the MPU. According to the temperature sent from the temperature sensor, the MPU calculates the level of electric power which should be applied to a flying height adjustment structure. According to the calculated electric power, the MPU increases or decreases the electric power applied to the flying height adjustment structure. At a flying height controlled (corrected) by the flying height adjustment structure, a magnetic head slider performs read/write on a magnetic disk.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: April 14, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Takanori Yamazaki, Hideaki Tanaka, Masayuki Kurita
  • Patent number: 7371808
    Abstract: A polymer treating method has the steps of: reacting a polymer compound with a reaction agent in a reaction vessel to generate a polymer treatment product; discharging the polymer treatment product containing the reaction agent from the reaction vessel; depressurizing the polymer treatment product; introducing the polymer treatment product into a degassing extruder; separating the reaction agent from the polymer treatment product through a vent box that is connected to upstream of the degassing extruder and that has a volume of equal to or more than that of the reaction vessel; and extruding the polymer treatment product from the degassing extruder.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: May 13, 2008
    Assignee: Hitachi Cable, Ltd.
    Inventors: Toshiharu Goto, Takanori Yamazaki
  • Publication number: 20080024915
    Abstract: Embodiments of the present invention provide a magnetic head and a magnetic disk drive using the same, which is capable of increasing efficiency in changing the flying height of an element portion by heat generation of a heater in the magnetic head using the heater as well as capable of suppressing the change of the flying height of the element portion at the time of recording. In a magnetic head according to one embodiment of the invention, when a portion is defined as a “heater immobility line”, in which a position of the positive pressure generation surface does not vary when the electricity is distributed to a heater, and a portion is defined as a “write immobility line”, in which a position of the positive pressure generation surface does not vary at the time of recording, the area of the raised region surrounded by the heater immobility line is smaller than the area of the raised region surrounded by the write immobility line.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 31, 2008
    Applicant: Hitachi Global Storage Technologies Netherlands B. V.
    Inventors: Koji Miyake, Hidekazu Kohira, Kiyoshi Hashimoto, Takanori Yamazaki, Hideaki Tanaka
  • Publication number: 20070110837
    Abstract: A polymer treating method has the steps of: reacting a polymer compound with a reaction agent in a reaction vessel to generate a polymer treatment product; discharging the polymer treatment product containing the reaction agent from the reaction vessel; depressurizing the polymer treatment product; introducing the polymer treatment product into a degassing extruder; separating the reaction agent from the polymer treatment product through a vent box that is connected to upstream of the degassing extruder and that has a volume of equal to or more than that of the reaction vessel; and extruding the polymer treatment product from the degassing extruder.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 17, 2007
    Inventors: Toshiharu Goto, Takanori Yamazaki
  • Publication number: 20070086112
    Abstract: In a magnetic disk drive, translational and pitching vibrations in the flying height direction of a magnetic head slider are to be damped quickly while stabilizing the flying of the magnetic head slider. In one embodiment of the present invention, a magnetic disk drive is provided with a magnetic recording medium and a magnetic head slider adapted to fly over a surface of the magnetic recording medium and read or write information. The magnetic head slider includes a slider air bearing surface and a magnetic transducer. The slider air bearing surface includes a front pad having front rail surfaces and front step bearing surfaces, a rear pad having a rear rail surface and a rear step bearing surface, and a negative-pressure groove interposed between the front pad and the rear pad. A vibration suppressing groove is formed in the rear rail surface so as to be deeper than the rear rail surface and to be closed at its surround.
    Type: Application
    Filed: September 14, 2006
    Publication date: April 19, 2007
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yuki Shimizu, Junguo Xu, Jianhua Li, Takanori Yamazaki
  • Patent number: 7202416
    Abstract: The present invention is concerned with an electromagnetic insulation wire, a method of manufacturing the same and an apparatus for manufacturing the same. The wire comprises a conductor and an electromagnetic insulation coat containing magnetic powder dispersed in a resin matrix. The particles of the powder are oriented in the coat in the circumferential direction of the conductor. The particles are oriented in the magnetic field, while the conductor and the composite material are passed through a die heated to a certain temperature.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: April 10, 2007
    Assignee: Hitachi Cable, Ltd.
    Inventors: Matahiro Komuro, Naofumi Chiwata, Masato Miyataki, Takanori Yamazaki
  • Publication number: 20070058296
    Abstract: Embodiments of the invention provide a slider structure able to lower a flying height compensation ratio caused by a projecting deformation of an air bearing surface of a slider by a flying height control mechanism and afford a change in flying height with a low control power. In one embodiment, a slider is provided with a leading edge, an air bearing surface, and a trailing edge. The air bearing surface includes a front pad, the front pad being made up of a front step bearing surface, leading rail surfaces, and side step bearing surfaces. The air bearing surface also includes a negative pressure groove surface surrounded by the front pad.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 15, 2007
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kiyoshi Hashimoto, Hidekazu Kohira, Takanori Yamazaki, Koji Miyake
  • Patent number: 7186794
    Abstract: A polymer treating method has the steps of: reacting a polymer compound with a reaction agent in a reaction vessel to generate a polymer treatment product; discharging the polymer treatment product containing the reaction agent from the reaction vessel; depressurizing the polymer treatment product; introducing the polymer treatment product into a degassing extruder; separating the reaction agent from the polymer treatment product through a vent box that is connected to upstream of the degassing extruder and that has a volume of equal to or more than that of the reaction vessel; and extruding the polymer treatment product from the degassing extruder.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: March 6, 2007
    Assignee: Hitachi Cable, Ltd.
    Inventors: Toshiharu Goto, Takanori Yamazaki
  • Publication number: 20070031646
    Abstract: A molded product and a method of manufacturing the same are disclosed, in which the insulating layer of uniform thickness is formed in a narrow clearance between plural metal bodies. Surroundings of metal plates spaced at specified intervals are covered with insulating polymer to insulate them electrically. A spacer polymer which consists of insulating polymer whose melting point is T1 is arranged between the metal plates, and a molded part which consists of insulating polymer whose melting point is T2(<T1) covers surroundings of the metal plates and the spacer polymer.
    Type: Application
    Filed: August 2, 2006
    Publication date: February 8, 2007
    Inventors: Takanori Yamazaki, Naofumi Chiwata, Takenori Taki
  • Patent number: 7164556
    Abstract: A magnetic head slider includes a magnetic head mounting surface, a slider rail surface, a step air bearing surface, and a negative pressure groove. The magnetic head mounting surface is arranged in a center area with respect to a width of the slider near an air flow-out edge on the slider and mounts a magnetic head. The slider rail surface has a first depth from the magnetic head mounting surface and its width on an air flow-in side for the magnetic head is wider that its width on an air flow-out side for the magnetic head. The step air bearing surface is formed on an air flow-in side of the slider rail surface and has a second depth from the slider rail surface. The negative-pressure groove which formed on an air flow-in side of the step air bearing surface and has a third depth from the step air bearing surface.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: January 16, 2007
    Assignee: Hitachi Global Storage Technologies Japan, Ltd.
    Inventors: Hidekazu Kohira, Masaaki Matsumoto, Hideaki Tanaka, Teruyoshi Higashiya, Kiyoshi Hashimoto, Akira Matsuda, Takanori Yamazaki
  • Patent number: 7122666
    Abstract: Compounds having activity against production of an inflammatory cytokine of formula (I)?: A? is pyrrole; R1? is phenyl or naphthyl; R2? is pyridyl or pyrimidinyl; R3? is (IIa)?, (IIb)? or (IIc)?: m? is 1; E? is nitrogen; D? is >C(R5?)—, R5? is hydrogen, Substituent ?? or Substituent ??; B? is nitrogen-containing 5-membered heterocyclic; R4? is 1 to 3 substituents from Substituent ??, Substituent ?? and Substituent ??; R1? and R3? are bonded to two atoms of the pyrrole adjacent to the pyrrole atom bonded to R2?; Substituent ?? is hydroxyl, nitro, cyano, halogen, alkoxy, halogeno alkoxy, alkylthio, halogeno alkylthio or —NRa?Rb?; Ra? and Rb? are hydrogen, alkyl, alkenyl, alkynyl, aralkyl or alkylsulfonyl, or Ra? and Rb? with the nitrogen atom form a heterocyclyl; Substituent ?? is alkyl, alkenyl, alkynyl, aralkyl or cycloalkyl; Substituent ?? is oxo, hydroxyimino, alkoxyimino, alkylene, alkylenedioxy, alkylsulfinyl, alkylsulfonyl, aryl, aryloxy, alkylidenyl or aralkylidenyl.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: October 17, 2006
    Assignee: Sankyo Company, Limited
    Inventors: Tomio Kimura, Akira Nakao, Nobuyuki Ohkawa, Takayoshi Nagasaki, Takanori Yamazaki
  • Publication number: 20060209464
    Abstract: Embodiments of the invention provide a magnetic disk device which lowers the cost, maintains reliability by compensating the thermal dent or protuberance caused by a change in the environmental temperature, makes it possible to increase the recording density by decreasing the floating amount of the slider, to increase the capacity of the device or to decrease the size thereof. In one embodiment, a magnetic disk device comprises a magnetic disk, a magnetic head slider, and a drive unit for moving the magnetic head slider, wherein an air stream is generated between the magnetic disk that rotates and the magnetic head slider to effect the recording or the reproduction in a state where the magnetic head slider is floating. The magnetic head slider includes a slider substrate portion and a thin-film head portion that has recording and reproducing elements, a metal film, and an insulating film formed on the slider substrate portion and constituting a slider-floating plane along with the slider substrate portion.
    Type: Application
    Filed: March 10, 2006
    Publication date: September 21, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Masayuki Kurita, Toshiya Shiramatsu, Kimitoshi Etoh, Takanori Yamazaki
  • Publication number: 20060139810
    Abstract: Embodiments of the invention reduce damage to a disk recording medium when a slider flying above the disk recording medium inside a magnetic disk drive comes into contact with the disk recording medium due to slider vibration. In one embodiment, a magnetic head slider includes a front pad, a rear pad, and carbon protective films. The front pad includes a step bearing surface disposed on the side of a leading end and leading side rail surfaces formed on the step bearing surface. The rear pad includes a rear step bearing surface disposed across a deep groove surface from the front pad and a trailing side rail surface formed on the rear step bearing surface. The carbon protective films are formed on regions including vertices of slider corner portions, respectively. The leading side rail surfaces and the trailing side rail surface are formed substantially on the same level. The carbon protective films are harder than a slider base material and have a small coefficient of friction.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 29, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kiyoshi Hashimoto, Hidekazu Kohira, Takanori Yamazaki, Koji Miyake
  • Publication number: 20060119974
    Abstract: Embodiments of the invention appropriately control the flying height of a magnetic head slider as necessary without making the magnetic head slider touch the magnetic disk. In one embodiment, when a magnetic disk drive is started, the level of electric power predefined for the ordinary temperature (room temperature) is read in from the internal memory of an MPU. A temperature sensor measures the internal temperature of the magnetic disk drive and sends it to the MPU. According to the temperature sent from the temperature sensor, the MPU calculates the level of electric power which should be applied to a flying height adjustment structure. According to the calculated electric power, the MPU increases or decreases the electric power applied to the flying height adjustment structure. At a flying height controlled (corrected) by the flying height adjustment structure, a magnetic head slider performs read/write on a magnetic disk.
    Type: Application
    Filed: November 18, 2005
    Publication date: June 8, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Takanori Yamazaki, Hideaki Tanaka, Masayuki Kurita
  • Publication number: 20050283006
    Abstract: Compounds having activity against production of inflammatory cytokines of formula (I)?: A? is pyrrole; R1? is aryl or heteroaryl; R2? is heteroaryl having at least one nitrogen atom; R3? is (IIa)?, (IIb)? or (IIc)?: m? is 1 or 2; one of D? and E? is nitrogen and the other is >C(R5?)—, R5? is hydrogen, Substituent ?? or Substituent ??; B? is nitrogen-containing 4- to 7-membered heterocyclic; R4? is 1 to 3 substituents from Substituent ??, Substituent ?? and Substituent ??; R1? and R3? are bonded to two atoms of the pyrrole adjacent to the pyrrole atom bonded to R2?; Substituent ??: hydroxyl, nitro, cyano, halogen, alkoxy, halogeno alkoxy, alkylthio, halogeno alkylthio or —NRa?Rb?; Ra? and Rb? are hydrogen, alkyl, alkenyl, alkynyl, aralkyl or alkylsulfonyl, or Ra? and Rb? with the nitrogen atom form a heterocyclyl; Substituent ??: alkyl, alkenyl, alkynyl, aralkyl or cycloalkyl; Substituent ??: oxo, hydroxyimino, alkoxyimino, alkylene, alkylenedioxy, alkylsulfinyl, alkylsulfonyl, aryl, aryloxy, alkyl
    Type: Application
    Filed: April 10, 2003
    Publication date: December 22, 2005
    Applicant: SANKYO COMPANY, LIMITED
    Inventors: Tomio Kimura, Kazumasa Aoki, Akira Nakao, Shigeru Ushiyama, Takaichi Shimozato, Nobuyuki Ohkawa, Takayoshi Nagasaki, Takanori Yamazaki
  • Publication number: 20050270697
    Abstract: A magnetic head slider includes a magnetic head mounting surface, a slider rail surface, a step air bearing surface, and a negative pressure groove. The magnetic head mounting surface is arranged in a center area with respect to a width of the slider near an air flow-out edge on the slider and mounts a magnetic head. The slider rail surface has a first depth from the magnetic head mounting surface and its width on an air flow-in side for the magnetic head is wider that its width on an air flow-out side for the magnetic head. The step air bearing surface is formed on an air flow-in side of the slider rail surface and has a second depth from the slider rail surface. The negative-pressure groove which formed on an air flow-in side of the step air bearing surface and has a third depth from the step air bearing surface.
    Type: Application
    Filed: August 11, 2005
    Publication date: December 8, 2005
    Inventors: Hidekazu Kohira, Masaaki Matsumoto, Hideaki Tanaka, Teruyoshi Higashiya, Kiyoshi Hashimoto, Akira Matsuda, Takanori Yamazaki
  • Publication number: 20050261470
    Abstract: A polymer treating method has the steps of: reacting a polymer compound with a reaction agent in a reaction vessel to generate a polymer treatment product; discharging the polymer treatment product containing the reaction agent from the reaction vessel; depressurizing the polymer treatment product; introducing the polymer treatment product into a degassing extruder; separating the reaction agent from the polymer treatment product through a vent box that is connected to upstream of the degassing extruder and that has a volume of equal to or more than that of the reaction vessel; and extruding the polymer treatment product from the degassing extruder.
    Type: Application
    Filed: October 6, 2004
    Publication date: November 24, 2005
    Inventors: Toshiharu Goto, Takanori Yamazaki
  • Publication number: 20050242464
    Abstract: A method of treating a polymer compound has the steps of: mixing and agitating the polymer compound and a chemical agent in an extruder while controlling the inside of the extruder to be kept at a high temperature and a high pressure to have a reaction mixture containing a polymer treated product; supplying the reaction mixture continuously into a high-pressure container disposed following the extruder and retaining the reaction mixture at the high temperature and high pressure for a predetermined time; then supplying the reaction mixture continuously to a chemical agent separator to separate the polymer treated product; and supplying the separated polymer treated product continuously to a molding means to form it into a molded material.
    Type: Application
    Filed: April 1, 2005
    Publication date: November 3, 2005
    Inventors: Toshiharu Goto, Takanori Yamazaki, Yoshihiko Iwamoto, Jun Kakizaki