Patents by Inventor Seiji Omura

Seiji Omura 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).

  • Publication number: 20210043358
    Abstract: A grain-oriented electrical steel sheet for a wound transformer core. The steel sheet having a sheet thickness t, where t and an iron loss deterioration ratio obtained by subjecting the steel sheet under elliptic magnetization satisfy the following relations: (i) when t?0.20 mm, the iron loss deterioration ratio is 60% or less; (ii) when 0.20 mm<t<0.27 mm, the iron loss deterioration ratio is 55% or less; and (iii) when 0.27 mm?t, the iron loss deterioration ratio is 50% or less. The iron loss deterioration ratio is calculated from ((WA?WB)/WB)×100, where WA is iron loss under 50 Hz elliptic magnetization of 1.7 T in a rolling direction and 0.6 T in a direction orthogonal to the rolling direction, and WB is iron loss under 50 Hz alternating magnetization of 1.7 T in the rolling direction.
    Type: Application
    Filed: January 31, 2019
    Publication date: February 11, 2021
    Applicant: JFE STEEL CORPORATION
    Inventors: Hirotaka INOUE, Seiji OKABE, Takeshi OMURA
  • Publication number: 20210027939
    Abstract: Vibration of an iron core is reduced to reduce transformer noise. An iron core for a transformer comprises a plurality of grain-oriented electrical steel sheets stacked together, wherein at least one of the plurality of grain-oriented electrical steel sheets: (1) has a region in which closure domains are formed in a direction crossing a rolling direction and a region in which no closure domains are formed; and (2) has an area ratio R of 0.10% to 30%, the area ratio R being an area ratio, to the whole grain-oriented electrical steel sheet, of a region in which a shrinkage amount at a maximum displacement point when excited in the rolling direction at a maximum magnetic flux density of 1.7 T and a frequency of 50 Hz is at least 2×10?7 less than a shrinkage amount in the region in which no closure domains are formed.
    Type: Application
    Filed: March 29, 2019
    Publication date: January 28, 2021
    Applicant: JFE STEEL CORPORATION
    Inventors: Takeshi OMURA, Hirotaka INOUE, Seiji OKABE
  • Publication number: 20210020349
    Abstract: Vibration of an iron core is reduced to reduce transformer noise. An iron core for a transformer comprises a plurality of grain-oriented electrical steel sheets stacked together, wherein at least one of the plurality of grain-oriented electrical steel sheets: (1) has a region in which closure domains are formed in a direction crossing a rolling direction and a region in which no closure domains are formed; (2) has an area ratio R0 of 0.10% to 3.0%, the area ratio R0 being defined as a ratio of S0 to S; and (3) has an area ratio R1a of 50% or more, the area ratio R1a being defined as a ratio of S1a to S1.
    Type: Application
    Filed: March 29, 2019
    Publication date: January 21, 2021
    Applicant: JFE STEEL CORPORATION
    Inventors: Takeshi OMURA, Hirotaka INOUE, Seiji OKABE
  • Publication number: 20200373046
    Abstract: A grain-oriented electrical steel sheet for a stacked transformer core. The steel sheet having a sheet thickness t, where t and an iron loss deterioration ratio obtained by subjecting the steel sheet under elliptic magnetization satisfy the following relations: (i) when t 0.20 mm, the iron loss deterioration ratio is 85% or less; (ii) when 0.20 mm<t<0.27 mm, the iron loss deterioration ratio is 80% or less; and (iii) when 0.27 mm?t, the iron loss deterioration ratio is 75% or less. The iron loss deterioration ratio is calculated from ((WA?WB)/WB)×100, where WA is iron loss under 50 Hz elliptic magnetization of 1.7 T in a rolling direction and 1.0 T in a direction orthogonal to the rolling direction, and WB is iron loss under 50 Hz alternating magnetization of 1.7 T in the rolling direction.
    Type: Application
    Filed: January 31, 2019
    Publication date: November 26, 2020
    Applicant: JFE STEEL CORPORATION
    Inventors: Hirotaka INOUE, Seiji OKABE, Takeshi OMURA
  • Publication number: 20200087746
    Abstract: Provided is a grain-oriented electrical steel sheet having better transformer iron loss property than conventional grain-oriented electrical steel sheets. A grain-oriented electrical steel sheet comprises: a steel substrate; a forsterite film on a surface of the steel substrate; and a Cr-depleted layer at a boundary between the steel substrate and the forsterite film, the Cr-depleted layer having a Cr concentration that is 0.70 times to 0.90 times a Cr concentration of the steel substrate.
    Type: Application
    Filed: December 14, 2017
    Publication date: March 19, 2020
    Applicant: JFE STEEL CORPORATION
    Inventors: Takeshi OMURA, Hirotaka INOUE, Kunihiro SENDA, Seiji OKABE
  • Publication number: 20200051731
    Abstract: Iron core vibration and transformer noise can be reduced by using, as a transformer iron core, an iron core formed by a stack of at least two types of grain-oriented electrical steel sheets that differ in magnetostriction by 2×10?7 or more when excited from 0 T to 1.7 T.
    Type: Application
    Filed: March 29, 2018
    Publication date: February 13, 2020
    Applicant: JFE STEEL CORPORATION
    Inventors: Seiji OKABE, Takeshi OMURA, Hirotaka INOUE
  • Patent number: 10465259
    Abstract: Disclosed are a grain-oriented electrical steel sheet having strain regions extending in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: Wmax/Wmin=1.2 or more and less than 2.5, where Wmax and Wmin respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; Wave being 80 ?m or more, where Wave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 ?m or more, where D denotes a maximum depth as measured in the sheet thickness direction; and (Wave*D)/s being 0.0007 mm or more and 0.0016 mm or less.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: November 5, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Shigehiro Takajo, Takeshi Omura, Seiji Okabe
  • Patent number: 10256444
    Abstract: A battery pack includes a plurality of unit cells, each including a cylindrical battery case, and a connecting member (12) that connects the unit cells to each other. The battery case of each unit cell includes a bottom surface portion (30b) including a plurality of gas discharging sections (32) that open when an internal pressure of the unit cell reaches a predetermined pressure. The gas discharging sections (32) are separated from each other. The connecting member (12) is joined to a non-opening section (34) of the bottom surface portion (30b), the non-opening section (34) being disposed between the gas discharging sections (32).
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: April 9, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Hiroyuki Okuda, Seiji Omura
  • Publication number: 20170047566
    Abstract: A battery pack includes a plurality of unit cells, each including a cylindrical battery case, and a connecting member (12) that connects the unit cells to each other. The battery case of each unit cell includes a bottom surface portion (30b) including a plurality of gas discharging sections (32) that open when an internal pressure of the unit cell reaches a predetermined pressure. The gas discharging sections (32) are separated from each other. The connecting member (12) is joined to a non-opening section (34) of the bottom surface portion (30b), the non-opening section (34) being disposed between the gas discharging sections (32).
    Type: Application
    Filed: June 8, 2015
    Publication date: February 16, 2017
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Hiroyuki Okuda, Seiji Omura
  • Patent number: 9240115
    Abstract: Disclosed is a power transmission apparatus to detect the deterioration state of a timing belt in use, thereby making it possible to detect at a high accuracy whether or not the timing belt reaches an exchanging time. The power transmission apparatus comprises a crankshaft pulley, an intake camshaft pulley, and a timing belt wound around the crankshaft pulley and the intake camshaft pulley. The timing belt contains a stress light emission material capable of emitting light when receiving an external force. The power transmission apparatus further comprises an optical sensor and an ECU. The optical sensor is disposed to measure light emitted from the timing belt. The ECU is operative to judge whether or not the timing belt is deteriorated and to judge that the timing belt reaches the exchanging time when the timing belt is judged to be deteriorated.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: January 19, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji Omura, Hiroyuki Nishiura
  • Patent number: 8852769
    Abstract: A nonaqueous secondary battery includes a current cutoff mechanism that cuts off a current in a short period of time in response to a rise in pressure inside a battery outer body in at least one of a conductive path through which a current is taken out from a positive electrode plate to outside of the battery and a conductive path through which a current is taken out from a negative electrode plate to outside of the battery. At least one type selected from an oligomer containing a cyclohexyl group and a phenyl group, a modified product of the oligomer containing a cyclohexyl group and a phenyl group, a polymer containing a cyclohexyl group and a phenyl group, and a modified product of the polymer containing a cyclohexyl group and a phenyl group is present on the surface of the positive electrode plate.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: October 7, 2014
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Masahiro Iyori, Hirofusa Tanaka, Naoki Terada, Seiji Omura, Yasuhiro Yamauchi, Toshiyuki Nohma, Masahide Miyake, Yasuyuki Kusumoto, Shigeki Matsuta, Toyoki Fujihara, Takeshi Yoshida
  • Publication number: 20130345946
    Abstract: Disclosed is a power transmission apparatus to detect the deterioration state of a timing belt in use, thereby making it possible to detect at a high accuracy whether or not the timing belt reaches an exchanging time. The power transmission apparatus comprises a crankshaft pulley, an intake camshaft pulley, and a timing belt wound around the crankshaft pulley and the intake camshaft pulley. The timing belt contains a stress light emission material capable of emitting light when receiving an external force. The power transmission apparatus further comprises an optical sensor and an ECU. The optical sensor is disposed to measure light emitted from the timing belt. The ECU is operative to judge whether or not the timing belt is deteriorated and to judge that the timing belt reaches the exchanging time when the timing belt is judged to be deteriorated.
    Type: Application
    Filed: March 11, 2011
    Publication date: December 26, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji Omura, Hiroyuki Nishiura
  • Patent number: 8256389
    Abstract: An open deck type cylinder block (10) that is one embodiment of the present invention is configured as follows. A shallow portion (21) and a deep portion (22) are provided in a water jacket (20). The shallow portion (21) is provided in a portion that is comparatively far from a head bolt hole (17), while on the other hand the deep portion (22) is provided in a portion that is comparatively close to the head bolt hole (17). A hollow portion (18) in which a block outer wall is hollowed toward a cylinder center side is provided between a bottom wall portion of the shallow portion (21) and a skirt portion (14) used as a crank case.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: September 4, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Nomura, Seiji Omura
  • Publication number: 20120107652
    Abstract: A nonaqueous secondary battery includes a current cutoff mechanism that cuts off a current in a short period of time in response to a rise in pressure inside a battery outer body in at least one of a conductive path through which a current is taken out from a positive electrode plate to outside of the battery and a conductive path through which a current is taken out from a negative electrode plate to outside of the battery. At least one type selected from an oligomer containing a cyclohexyl group and a phenyl group, a modified product of the oligomer containing a cyclohexyl group and a phenyl group, a polymer containing a cyclohexyl group and a phenyl group, and a modified product of the polymer containing a cyclohexyl group and a phenyl group is present on the surface of the positive electrode plate.
    Type: Application
    Filed: October 24, 2011
    Publication date: May 3, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Masahiro Iyori, Hirofusa Tanaka, Naoki Terada, Seiji Omura, Yasuhiro Yamauchi, Toshiyuki Nohma, Masahide Miyake, Yasuyuki Kusumoto, Shigeki Matsuta, Toyoki Fujihara, Takeshi Yoshida
  • Publication number: 20110285388
    Abstract: A power transmission belt formed with an encoder on its surface, method of manufacturing the power transmission belt, and a load detection system using the power transmission belt. The power transmission belt comprises a band-like magnetic rubber layer provided in a part of a belt layer structure of the power transmission belt which transmits power to an auxiliary machine of an automobile engine along the longitudinal direction of the belt layer structure. The surface of the magnetic rubber layer constitutes a multipolar magnetized surface alternately provided with N-poles and S-poles along the longitudinal direction of the belt layer structure, the surface of the magnetic rubber layer is capable of outputting signals for calculating load applied to the belt layer structure by the auxiliary machine to a plurality of magnetic sensors provided along the longitudinal direction of the belt layer structure, and one of the sensors is provided at a position where the auxiliary machine is provided.
    Type: Application
    Filed: July 24, 2009
    Publication date: November 24, 2011
    Inventors: Masanori Tomioka, Seiji Omura
  • Patent number: 8057553
    Abstract: A method for manufacturing a solid electrolytic capacitor having a solid electrolyte layer containing an electrically conductive polymer layer formed by electrolytic oxidative polymerization, comprising: forming a dielectric layer on a surface of an anode element containing a valve metal; forming an electrically conductive precoat layer on the dielectric layer; and performing electrolytic oxidative polymerization in an electrolytic polymerization solution containing a monomer, a dopant agent and a chelating agent to form the electrically conductive polymer layer on the electrically conductive precoat layer.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: November 15, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
  • Patent number: 8050014
    Abstract: A solid electrolytic capacitor having a solid electrolyte layer, comprising: the solid electrolyte layer having an electrically-conductive polymer hybrid layer containing an electrolytically-polymerized electrically-conductive polymer and a chemically-polymerized electrically-conductive polymer.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: November 1, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
  • Patent number: 7744095
    Abstract: A cylinder head gasket for sealing between a cylinder block and a cylinder head, composed of a composite base plate, the composite base plate comprising a core material plate and a compound layer formed on the front and back surfaces of the core material plate, the compound layer being formed by coating compound materials which contain a rubber and a fiber material. The cylinder head gasket is comprised of an annular groove which is formed by pressing the corresponding region around the cylinder bore of the compound layer, and a bead projecting from the surface of the compound layer which is formed by inserting the rubber material into the annular groove.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: June 29, 2010
    Assignees: Uchiyama Manufacturing Corp., U-Sun Gasket Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsunori Matsuki, Masashi Himesaki, Shigeo Ogaki, Seiji Omura, Akira Yasuki
  • Publication number: 20100095912
    Abstract: An open deck type cylinder block (10) that is one embodiment of the present invention is configured as follows. A shallow portion (21) and a deep portion (22) are provided in a water jacket (20). The shallow portion (21) is provided in a portion that is comparatively far from a head bolt hole (17), while on the other hand the deep portion (22) is provided in a portion that is comparatively close to the head bolt hole (17). A hollow portion (18) in which a block outer wall is hollowed toward a cylinder center side is provided between a bottom wall portion of the shallow portion (21) and a skirt portion (14) used as a crank case.
    Type: Application
    Filed: March 13, 2008
    Publication date: April 22, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Nomura, Seiji Omura
  • Patent number: 7520256
    Abstract: A cylinder block 3 of an engine 1 is formed by assembling an inner block member 10 and an outer block member 15. The inner block member 10 includes an upper deck portion 7 integrated with a cylinder liner portion 8. The outer block member 15 includes a cylinder outer wall portion 12. The cylinder head 2 is fastened to an upper deck portion 7 with head bolts 31. The cylinder outer wall portion 12 is fastened to the upper deck portion 7 with block fastening bolts 32 at an opposite side of the upper deck portion 7 with respect to the cylinder head 2. The head bolts 31 and the block fastening bolts 32 are threaded with the upper deck portion 7 from the opposite sides with respect to each other. As a result, deformation of the upper deck portion 7 and inclination of the cylinder liner portion 8 due to fastening of the bolts 31, 32 are reliably prevented.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: April 21, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Omura, Ken Yamada