Patents by Inventor Hiroyuki Kawata

Hiroyuki Kawata 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: 8796971
    Abstract: In a motor drive apparatus for driving a three-phase AC motor, a first mounting part of a heat sink is formed along an end. A second mounting part is formed in a direction perpendicular to the first mounting part and includes a first column part and a second column part. Three motor relay FETs are mounted on the first mounting part. Six inverter FETs and two power relay FETs are mounted on the second mounting part. Leads of the FETs are electrically connected to an electric circuit substrate. Heat generated by the FETs is radiated to the heat sink through an insulating and heat radiating sheet. By thus arranging the FETs, the motor drive apparatus is reduced in size.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 5, 2014
    Assignee: Denso Corporation
    Inventors: Takashi Tsuboi, Hiroyuki Kawata, Yasuyoshi Toda
  • Publication number: 20140212684
    Abstract: The present invention provides a high-strength galvanized steel sheet with maximum tensile strength of 900 MPa or more. The high-strength galvanized steel sheet has an alloyed galvanized layer formed on a surface of a base steel sheet containing predetermined amounts of C, Si, Mn, P, S, Al, N, O with a balance being constituted of iron and inevitable impurities, in which in a structure of the base steel sheet, retained austenite is limited to 8% or less in volume fraction, kurtosis K* of the hardness distribution between 2% hardness and 98% hardness is ?0.30 or less, a ratio between Vickers hardness of surface layer of the base steel sheet and Vickers hardness of ¼ thickness of the base steel sheet is 0.35 to 0.70, and a content of iron in the alloyed galvanized layer is 8 to 12% in mass %.
    Type: Application
    Filed: July 27, 2012
    Publication date: July 31, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Takeshi Yasui, Takuya Kuwayama, Shigeru Yonemura
  • Publication number: 20140205855
    Abstract: [Summary] The present invention provides a high-strength steel sheet excellent in impact resistance. The high-strength steel sheet contains predetermined contents of C, Si, Mn, P, S, Al, Ti, N, and O, with the balance being iron and inevitable impurities, and has a steel sheet structure in which, in a ? thickness to ? thickness region across ¼ of a sheet thickness, 1 to 8% retained austenite is contained in volume fraction, an average aspect ratio of the retained austenite is 2.0 or less, an amount of solid-solution Mn in the retained austenite is 1.1 times an average amount of Mn or more, and TiN grains having a 0.5 ?m average grain diameter or less are contained, and a density of AlN grains with a 1 ?m grain diameter or more is 1.0 pieces/mm2 or less, wherein a maximum tensile strength is 900 MPa or more.
    Type: Application
    Filed: July 27, 2012
    Publication date: July 24, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Hajime Hasegawa, Chisato Wakabayashi, Tsuyoshi Oki
  • Patent number: 8786149
    Abstract: A motor body has feeder terminals. Connecting ends of the corresponding feeder terminals are exposed radially outward from a motor case. The motor body has an end frame having an attachment portion. In this configuration, a control unit is fixed to the attachment portion and connecting terminals of the control unit are arranged to be allowed to contact the corresponding connecting ends. By fastening the fastening screws at positions radially outward of the motor case, the connecting terminals of the control unit are connected to the connecting ends of the motor body.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: July 22, 2014
    Assignees: Asmo Co., Ltd., Denso Corporation
    Inventors: Yuuji Yamashita, Noriyuki Suzuki, Yasuyoshi Toda, Hiroyuki Kawata
  • Publication number: 20140193665
    Abstract: Provided are: a galvannealed steel sheet, reliably and sufficiently improved in the adhesiveness of a plated layer with a base steel sheet, as a galvannealed steel sheet, prepared by using a high-strength steel sheet as a base material; and a method for producing the galvannealed steel sheet. The galvannealed steel sheet wherein a galvannealed layer is formed on a base steel sheet including a high-strength steel having predetermined component composition; the average amount of Fe in the galvannealed layer is in a range of 8.0 to 12.0%; and the absolute value ?Fe of a difference between the amount of Fe in the vicinity of an interface with the base steel sheet (the amount of Fe in the vicinity of an internal side) and the amount of Fe in the vicinity of the external surface of the plated layer (the amount of Fe in the vicinity of an external side) in the plated layer is in a range of 0.0 to 3.0%.
    Type: Application
    Filed: July 27, 2012
    Publication date: July 10, 2014
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Takeshi Yasui
  • Publication number: 20140170440
    Abstract: High strength steel sheet which secures tensile maximum strength 900 MPa or more high strength while having excellent shapeability, which high strength steel sheet which is excellent in shapeability characterized by having a predetermined composition of ingredients, by the steel sheet structure including a ferrite phase and martensite phase, by the ratio of Cu particles incoherent with the bcc iron being 15% or more with respect to the Cu particles as a whole, by a density of Cu particles in the ferrite phase being 1.0×1018/m3 or more, and by an average particle size of Cu particles in the ferrite phase being 2.0 nm or more.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 19, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Masafumi Azuma, Takuya Kuwayama, Shigeru Yonemura
  • Publication number: 20140162088
    Abstract: High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of ?60° C. or less.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 12, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Akinobu Minami, Takeshi Yasui, Yuji Yamaguchi, Natsuko Sugiura
  • Patent number: 8586698
    Abstract: The present invention relates to a production process for a phenols novolac resin obtained by reacting phenols with formaldehydes, wherein they are reacted in the presence of a metal compound used as a catalyst for the reaction described above, and a chelating agent is further added in order to deactivate a catalytic action of the metal compound and a resin-coated sand prepared by using the above phenols novolac resin. It is possible to provide a process for producing a phenols novolac resin having an ortho rate of 30 to 60%, suitably 40 to 55% at a good yield (70% or more) and a resin-coated sand having a high curing property prepared by using the above phenols novolac resin.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: November 19, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Hiroyuki Kawata, Sadao Takashou, Tetsurou Saikawa
  • Publication number: 20130257193
    Abstract: A motor drive apparatus includes a heat sink, on which a power module is disposed. A control circuit board and a power circuit board are disposed on axially opposite sides of the heat sink. A component carrier is disposed close to the power circuit board at a side opposite to an output part of a motor case. An electric connector is extended from the component carrier, passed through a hole of a cover and extended to an outside opposite to the output part. Even in a case where a mounting space is limited in a radial direction of the motor case, the electric connector can be easily connected to an external connector of a vehicle.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: DENSO CORPORATION
    Inventors: Yasuyoshi TODA, Hiroyuki KAWATA
  • Publication number: 20130167980
    Abstract: This high-strength steel sheet includes by mass percentage: 0.05 to 0.4% of C; 0.1 to 2.5% of Si; 1.0 to 3.5% of Mn; 0.001 to 0.03% of P; 0.0001 to 0.01% of S; 0.001 to 2.5% of Al; 0.0001 to 0.01% of N; 0.0001 to 0.008% of O; and a remainder composed of iron and inevitable impurities, wherein a steel sheet structure contains by volume fraction 10 to 50% of a ferrite phase, 10 to 50% of a tempered martensite phase, and a remaining hard phase, wherein a 98% hardness is 1.5 or more times as high as a 2% hardness in a range from ? to ? of a thickness of the steel sheet, wherein a kurtosis K* of the hardness distribution between the 2% hardness and the 98% hardness is ?1.2 to ?0.4, and wherein an average crystal grain size in the steel sheet structure is 10 ?m or less.
    Type: Application
    Filed: September 16, 2011
    Publication date: July 4, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kawata, Naoki Maruyama, Akinobu Murasato, Naoki Yoshinaga, Chisato Wakabayashi, Noriyuki Suzuki
  • Publication number: 20130037180
    Abstract: A high-strength cold-rolled steel sheet includes, by mass %, C: 0.10% to 0.40%, Mn: 0.5% to 4.0%, Si: 0.005% to 2.5%, Al: 0.005% to 2.5%, Cr: 0% to 1.0%, and a balance of iron and inevitable impurities, in which an amount of P is limited to 0.05% or less, an amount of S is limited to 0.02% or less, an amount of N is limited to 0.006% or less, the microstructure includes 2% to 30% of retained austenite by area percentage, martensite is limited to 20% or less by area percentage in the microstructure, an average particle size of cementite is 0.01 ?m to 1 ?m, and 30% to 100% of the cementite has an aspect ratio of 1 to 3.
    Type: Application
    Filed: January 26, 2011
    Publication date: February 14, 2013
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kohichi Sano, Chisato Wakabayashi, Hiroyuki Kawata, Riki Okamoto, Naoki Yoshinaga, Kaoru Kawasaki, Natsuko Sugiura, Nobuhiro Fujita
  • Publication number: 20120286712
    Abstract: In a motor drive apparatus for driving a three-phase AC motor, a first mounting part of a heat sink is formed along an end. A second mounting part is formed in a direction perpendicular to the first mounting part and includes a first column part and a second column part. Three motor relay FETs are mounted on the first mounting part. Six inverter FETs and two power relay FETs are mounted on the second mounting part. Leads of the FETs are electrically connected to an electric circuit substrate. Heat generated by the FETs is radiated to the heat sink through an insulating and heat radiating sheet. By thus arranging the FETs, the motor drive apparatus is reduced in size.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 15, 2012
    Applicant: DENSO CORPORATION
    Inventors: Takashi Tsuboi, Hiroyuki Kawata, Yasuyoshi Toda
  • Publication number: 20120286594
    Abstract: An ECU attached to a motor assembly has a substrate and a heat sink. The substrate mounts thereon a microcomputer, which controls driving of a motor in accordance with a rotation angle of the motor. The substrate is fixed to the heat sink. The substrate has a first through hole group and a second through hole group, which are through holes connectable electrically by soldering to rotation angle signal wires connected to a rotation angle sensor, which detects a rotation angle of the motor.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 15, 2012
    Applicant: Denso Corporation
    Inventors: Hiroyuki MIYAKI, Hiroyuki Kawata, Yasuyoshi Toda
  • Publication number: 20120286602
    Abstract: In an ECU attached to a motor assembly, inverter FETs, which generate outputs for driving a motor, are electrically connected to a substrate. A plurality of screw holes is formed in a heat sink thereby to fix the substrate. A resin member is provided between the heat sink and the substrate and has a plurality of motor terminals and a resin mold, which integrally fix the motor terminals by molding the motor terminals. The motor terminal has an embedded part, a L-shaped substrate-side exposed part and a motor-side exposed side including a curbed part. The resin member and the substrate are tightened together and fixed to the heat sink.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 15, 2012
    Applicant: DENSO CORPORATION
    Inventors: Takayuki Uchida, Hiroyuki Kawata, Yasuyoshi Toda
  • Publication number: 20120222781
    Abstract: High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a) by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×108 (particles/mm3) or more.
    Type: Application
    Filed: November 30, 2010
    Publication date: September 6, 2012
    Inventors: Masafumi Azuma, Noriyuki Suzuki, Naoki Maruyama, Akinobu Murasato, Yasuharu Sakuma, Hiroyuki Kawata, Chisato Wakabayashi
  • Publication number: 20120223623
    Abstract: A motor has a motor body and a control unit, which is joined to the motor body. A resolver is connected to the control unit through a flat cable. The flat cable is arranged such that the width direction of the flat cable corresponds with a circumferential direction of the motor body. The flat cable extends outwardly in a radial direction of the motor case.
    Type: Application
    Filed: February 29, 2012
    Publication date: September 6, 2012
    Applicants: Denso Corporation, Asmo Co., Ltd.
    Inventors: Yuuji Yamashita, Noriyuki Suzuki, Yasuyoshi Toda, Hiroyuki Kawata
  • Publication number: 20120223624
    Abstract: A motor body has feeder terminals. Connecting ends of the corresponding feeder terminals are exposed radially outward from a motor case. The motor body has an end frame having an attachment portion. In this configuration, a control unit is fixed to the attachment portion and connecting terminals of the control unit are arranged to be allowed to contact the corresponding connecting ends. By fastening the fastening screws at positions radially outward of the motor case, the connecting terminals of the control unit are connected to the connecting ends of the motor body.
    Type: Application
    Filed: February 29, 2012
    Publication date: September 6, 2012
    Applicants: Denso Corporation, Asmo Co., Ltd.
    Inventors: Yuuji Yamashita, Noriyuki Suzuki, Yasuyoshi Toda, Hiroyuki Kawata
  • Publication number: 20120141829
    Abstract: Provided is a spot welded joint (10) which includes at least one thin steel plate with a tensile strength of 750 MPa to 1850 MPa and a carbon equivalent Ceq of equal to or more than 0.22 mass % to 0.55 mass % and in which a nugget (3) is formed in an interface of the thin steel plates (1A, 1B). In a nugget outer layer zone, a microstructure consists of a dendrite structure in which an average value of arm intervals is equal to or less than 12 ?m, an average grain diameter of carbides contained in the microstructure is 5 nm to 100 nm, and a number density of carbides is equal to or more than 2×106/mm2.
    Type: Application
    Filed: August 30, 2010
    Publication date: June 7, 2012
    Inventors: Hatsuhiko Oikawa, Hideki Hamatani, Masafumi Azuma, Noriyuki Suzuki, Fuminori Watanabe, Naoki Maruyama, Hiroyuki Kawata
  • Patent number: 8102654
    Abstract: A connector fixation structure includes: a connector having a rectangular connector body, protrusions protruding from facing sides in a wing like manner, and a terminal embedded in and protruding from the connector body; a heat sink having a plate shape body, a through hole and columnar convexities; and a printed board. The bottom of the connector is inserted into the through hole of the heat sink. Each columnar convexity is disposed on the plate shape body at a predetermined position corresponding to the protrusion. The top of the connector contacts a first surface of the printed board, and each columnar convexity is fixed to the printed board via the corresponding protrusion with a first screw.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: January 24, 2012
    Assignee: Denso Corporation
    Inventors: Takashi Tsuboi, Hiroyuki Kawata, Yasuyoshi Toda
  • Publication number: 20110086974
    Abstract: The present invention relates to a production process for a phenols novolac resin obtained by reacting phenols with formaldehydes, wherein they are reacted in the presence of a metal compound used as a catalyst for the reaction described above, and a chelating agent is further added in order to deactivate a catalytic action of the metal compound and a resin-coated sand prepared by using the above phenols novolac resin. It is possible to provide a process for producing a phenols novolac resin having an ortho rate of 30 to 60%, suitably 40 to 55% at a good yield (70% or more) and a resin-coated sand having a high curing property prepared by using the above phenols novolac resin.
    Type: Application
    Filed: June 3, 2009
    Publication date: April 14, 2011
    Inventors: Hiroyuki Kawata, Sadao Takeshou, Tetsurou Saikawa