Patents by Inventor Kazuo Yoshikawa

Kazuo Yoshikawa 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: 11784545
    Abstract: An apparatus for manufacturing a stator includes a placement table, a supporting member and a resistance heating device. The placement table is configured to have a stator core, which has coil segments and insulators inserted in slots thereof, placed thereon. The stator core is formed of steel sheets that are laminated in an axial direction of the stator core. The coil segments together form a stator coil. The insulators are formed of a material that is foamable upon being heated. The supporting member is configured to support, in the axial direction of the stator core, distal end portions of teeth of the stator core so as to prevent gaps from being formed between the steel sheets forming the stator core. The resistance heating device is configured to heat, through energization of the stator coil, the insulators along with the stator coil and thereby cause the insulators to foam.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: October 10, 2023
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuo Yoshikawa, Masashi Kitsunezuka, Shimpei Fujiwara
  • Patent number: 11404946
    Abstract: An apparatus for manufacturing a stator includes a supporting member configured to support a stator core, at least one processing jig having a cylindrical part and a plurality of protruding parts, and an operating unit. The operating unit is configured to perform, in a state where each of coil protruding parts is inserted between one circumferentially-adjacent pair of the protruding parts of the processing jig and an axial end face of the stator core is located close to the protruding parts of the processing jig, a first operation and a second operation either simultaneously or alternately. The first operation is an operation of relatively rotating the stator core and the processing jig in a circumferential direction of the stator core. The second operation is an operation of relatively moving the stator core and the processing jig away from each other in an axial direction of the stator core.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: August 2, 2022
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasunori Kitakado, Kazuo Yoshikawa, Hiroaki Takeda, Junichi Shimoya, Kazushi Onda
  • Publication number: 20210119520
    Abstract: An apparatus for manufacturing a stator includes a placement table, a supporting member and a resistance heating device. The placement table is configured to have a stator core, which has coil segments and insulators inserted in slots thereof, placed thereon. The stator core is formed of steel sheets that are laminated in an axial direction of the stator core. The coil segments together form a stator coil. The insulators are formed of a material that is foamable upon being heated. The supporting member is configured to support, in the axial direction of the stator core, distal end portions of teeth of the stator core so as to prevent gaps from being formed between the steel sheets forming the stator core. The resistance heating device is configured to heat, through energization of the stator coil, the insulators along with the stator coil and thereby cause the insulators to foam.
    Type: Application
    Filed: October 9, 2020
    Publication date: April 22, 2021
    Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuo YOSHIKAWA, Masashi KITSUNEZUKA, Shimpei FUJIWARA
  • Patent number: 10982093
    Abstract: The present invention provides a low-dielectric resin composition comprising (A) a urethane resin obtained by reacting a polycarbonate diol and an isocyanate, (B) an epoxy resin, and (C) a filler, wherein the (A) urethane resin has a carboxyl group equivalent weight of 1,100 to 5,700 g/eq; the epoxy equivalent weight of the (B) epoxy resin is 0.3 to 4.5 equivalents per 1.0 equivalent of the carboxyl group of the (A) urethane resin, the (A) urethane resin has a weight-average molecular weight of 5,000 to 80,000; the (A) urethane resin has a polycarbonate content of 35% by mass or lower; the resin composition comprises 50 parts by mass or less of the (C) filler per 100 parts by mass of the (A) urethane resin; and the resin composition comprises substantially no imido group.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: April 20, 2021
    Assignee: Arisawa Mfg. Co., Ltd.
    Inventors: Kazuo Yoshikawa, Makoto Tai, Nobuyuki Iwano
  • Publication number: 20210083560
    Abstract: An apparatus for manufacturing a stator includes a supporting member configured to support a stator core, at least one processing jig having a cylindrical part and a plurality of protruding parts, and an operating unit. The operating unit is configured to perform, in a state where each of coil protruding parts is inserted between one circumferentially-adjacent pair of the protruding parts of the processing jig and an axial end face of the stator core is located close to the protruding parts of the processing jig, a first operation and a second operation either simultaneously or alternately. The first operation is an operation of relatively rotating the stator core and the processing jig in a circumferential direction of the stator core. The second operation is an operation of relatively moving the stator core and the processing jig away from each other in an axial direction of the stator core.
    Type: Application
    Filed: September 2, 2020
    Publication date: March 18, 2021
    Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasunori Kitakado, Kazuo Yoshikawa, Hiroaki Takeda, Junichi Shimoya, Kazushi Onda
  • Publication number: 20180242448
    Abstract: The present invention provides a resin composition comprising a specific styrene polymer, a specific inorganic filler, and a curing agent, wherein the styrene polymer is a specific acid-modified styrene polymer, and the resin composition satisfies specific conditions in the form of a film having a thickness of 25 ?m.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 23, 2018
    Inventors: Kazuo YOSHIKAWA, Makoto TAI, Nobuyuki IWANO, Takayuki MAYAMA
  • Publication number: 20180022919
    Abstract: The present invention provides a low-dielectric resin composition comprising (A) a urethane resin obtained by reacting a polycarbonate diol and an isocyanate, (B) an epoxy resin, and (C) a filler, wherein the (A) urethane resin has a carboxyl group equivalent weight of 1,100 to 5,700 g/eq; the epoxy equivalent weight of the (B) epoxy resin is 0.3 to 4.5 equivalents per 1.0 equivalent of the carboxyl group of the (A) urethane resin, the (A) urethane resin has a weight-average molecular weight of 5,000 to 80,000; the (A) urethane resin has a polycarbonate content of 35% by mass or lower; the resin composition comprises 50 parts by mass or less of the (C) filler per 100 parts by mass of the (A) urethane resin; and the resin composition comprises substantially no imido group.
    Type: Application
    Filed: February 8, 2016
    Publication date: January 25, 2018
    Inventors: Kazuo YOSHIKAWA, Makoto TAI, Nobuyuki IWANO
  • Patent number: 9511511
    Abstract: Provided is a resin-coated saw wire that, when used to cut a workpiece, has a shallow depth of a damaged layer and can give a cut article having a smooth surface. The resin-coated saw wire is used in cutting of the workpiece using a sawing machine and includes a steel wire and a resin coating covering the steel wire surface. The resin coating contains substantially no abrasive grain, has a hardness at 120° C. of 0.07 GPa or more, and has a hardness controlled so as to prevent abrasive grains from coming into the resin coating, which abrasive grains are sprayed during workpiece cutting.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: December 6, 2016
    Assignee: KOBELCO RESEARCH INSTITUTE, INC.
    Inventors: Kazuo Yoshikawa, Hiroshi Yaguchi, Kazuhisa Fujisawa, Masanori Anan, Akinori Uratsuka, Yoshitake Matsushima
  • Publication number: 20160325466
    Abstract: A method for cutting a workpiece except silicon includes moving a resin-coated saw wire having a resin coating that covers the surface of a steel wire. In the method, at least one of the resin-coated saw wire or the workpiece is swung, a diamond abrasive grain having an average grain size of more than 0 ?m and 8 ?m or less is sprayed onto the resin-coated saw wire, and a wire running speed of the resin-coated saw wire is 800 m/min or higher.
    Type: Application
    Filed: January 9, 2015
    Publication date: November 10, 2016
    Applicant: KOBELCO RESEARCH INSTITUTE, INC.
    Inventors: Kazuo YOSHIKAWA, Masanori ANAN, Akinori URATSUKA, Yoshitake MATSUSHIMA
  • Publication number: 20160280979
    Abstract: A resin composition for a flexible printed circuit board that can attain high adhesiveness and solder reflow resistance even if a base film having low dielectric properties is used, and that attains excellent electrical properties. The resin comprises a fluororesin and an isocyanate compound, wherein the fluororesin has a content of 1 to 50% by mass, and a hydroxyl equivalent of 300 to 5500 g/equivalent.
    Type: Application
    Filed: June 9, 2016
    Publication date: September 29, 2016
    Inventors: Akira Uchiyama, Kazuo Yoshikawa, Makoto Tai, Nobuyuki Iwano
  • Publication number: 20140165988
    Abstract: Provided is a resin-coated saw wire that, when used to cut a workpiece, has a shallow depth of a damaged layer and can give a cut article having a smooth surface. The resin-coated saw wire is used in cutting of the workpiece using a sawing machine and includes a steel wire and a resin coating covering the steel wire surface. The resin coating contains substantially no abrasive grain, has a hardness at 120° C. of 0.07 GPa or more, and has a hardness controlled so as to prevent abrasive grains from coming into the resin coating, which abrasive grains are sprayed during workpiece cutting.
    Type: Application
    Filed: August 17, 2012
    Publication date: June 19, 2014
    Applicant: KOBELCO RESEARCH INSTITUTE, INC.
    Inventors: Kazuo Yoshikawa, Hiroshi Yaguchi, Kazuhisa Fujisawa, Masanori Anan, Akinori Uratsuka, Yoshitake Matsushima
  • Publication number: 20130316170
    Abstract: A resin composition for a flexible printed circuit board that can attain high adhesiveness and solder reflow resistance even if a base film having low dielectric properties is used, and that attains excellent electrical properties. The resin comprises a fluororesin and an isocyanate compound, wherein the fluororesin has a content of 1 to 50% by mass, and a hydroxyl equivalent of 300 to 5500 g/equivalent.
    Type: Application
    Filed: May 28, 2013
    Publication date: November 28, 2013
    Applicant: ARISAWA MFG. CO., LTD.
    Inventors: Akira Uchiyama, Kazuo Yoshikawa, Makoto Tai, Nobuyuki Iwano
  • Patent number: 7954986
    Abstract: A vehicle light can have a simple configuration for easily determining whether or not a coating, such as an anti-fog coating and a hard coating, has been applied to a lens. A manufacturing method of such a vehicle light is also disclosed. The vehicle light can include a housing opened in an illumination direction, a light source disposed within the housing, a reflecting surface disposed within the housing and configured to reflect light from the light source to the illumination direction, and an outer lens disposed so as to hermetically close the front open end of the housing. The outer lens can have an inner surface and an outer surface, at least one of which including a coating for surface treatment. The outer lens can further have a first area which is subjected to a texturing process on the inner surface and/or the outer surface, with at least part of the first area including the coating for surface treatment.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: June 7, 2011
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Motoyasu Ishizu, Kazuo Yoshikawa
  • Patent number: 7754177
    Abstract: A hollow carbon nanoballoon structure having a relatively large closed space, and a method of producing a carbon nanoballoon structure capable of easily and stably producing such a structure. The carbon nanoballoon structure is obtained by heating soot prepared by an arc discharge using carbon electrodes, soot prepared by vaporizing carbon by laser irradiation, or carbon black having a specific surface area of 1000 m2/g or more and a primary particle diameter of 20 nm or more at a high temperature in an inert gas atmosphere, and includes graphite sheets linked to form a curved surface.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: July 13, 2010
    Assignees: Tokai Carbon Co., Ltd., Futaba Corporation
    Inventors: Hirofumi Takikawa, Akira Kondo, Kazuo Yoshikawa, Shigeo Itoh
  • Publication number: 20100068626
    Abstract: A negative electrode material for lithium secondary batteries includes carbon microspheres having an arithmetic mean particle diameter do measured using an electron microscope of 150 to 1000 nm, a volatile content Vm of 5.0% or less, a ratio ?Dst/Dst (where, Dst indicates the Stokes mode diameter Dst measured using a disk centrifuge (DCF), and ?Dst indicates the half-width of the Stokes mode diameter Dst) of 0.40 to 1.10, and a lattice spacing (d002) measured by X-ray diffractometry of 0.370 nm or less. The negative electrode material is used for a high-output lithium secondary battery that has a high lithium ion doping-undoping speed and excellent cycle characteristics, and is suitable as a power supply for portable instruments, hybrid cars, electric vehicles, and the like.
    Type: Application
    Filed: May 29, 2007
    Publication date: March 18, 2010
    Inventors: Kazuo Yoshikawa, Koji Miura, Masakatsu Tsuchiya, Kenta Ishii
  • Publication number: 20090122569
    Abstract: A vehicle light can have a simple configuration for easily determining whether or not a coating, such as an anti-fog coating and a hard coating, has been applied to a lens. A manufacturing method of such a vehicle light is also disclosed. The vehicle light can include a housing opened in an illumination direction, a light source disposed within the housing, a reflecting surface disposed within the housing and configured to reflect light from the light source to the illumination direction, and an outer lens disposed so as to hermetically close the front open end of the housing. The outer lens can have an inner surface and an outer surface, at least one of which including a coating for surface treatment. The outer lens can further have a first area which is subjected to a texturing process on the inner surface and/or the outer surface, with at least part of the first area including the coating for surface treatment.
    Type: Application
    Filed: September 29, 2008
    Publication date: May 14, 2009
    Inventors: Motoyasu Ishizu, Kazuo Yoshikawa
  • Publication number: 20070207081
    Abstract: A hollow carbon nanoballoon structure having a relatively large closed space, and a method of producing a carbon nanoballoon structure capable of easily and stably producing such a structure. The carbon nanoballoon structure is obtained by heating soot prepared by arc discharge using carbon electrodes, soot prepared by vaporizing. carbon by laser irradiation, or carbon black having a specific surface area of 1000 m2/g or more and a primary particle diameter of 20 nm or more at a high temperature in an inert gas atmosphere, and includes graphite sheets linked to form a curved surface.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 6, 2007
    Inventors: Hirofumi Takikawa, Akira Kondo, Kazuo Yoshikawa, Shigeo Itoh
  • Patent number: 7233358
    Abstract: An autofocus adapter for detachably mounting between an imaging lens and a camera body and for detecting the focus state of the imaging lens is disclosed. The autofocus adapter includes two focus state detecting elements with light receiving surfaces slightly displaced in front and in back of a desired position of focus of the imaging lens. A beamsplitter directs some light to the two focus state detecting elements and some light through the autofocus adapter for forming an image in a camera. The autofocus adapter includes a relay lens system and electronics for detecting the focus state and controlling the focus of the imaging lens to an in-focus state based on the images detected at the two focus state detecting elements. The beamsplitter may deflect equal amounts of light to the two light receiving surfaces, and the autofocus adapter may include an iris.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: June 19, 2007
    Assignee: Fujinon Corporation
    Inventor: Kazuo Yoshikawa
  • Patent number: RE43590
    Abstract: Disclosed is an electrode for semiconductor devices capable of suppressing the generation of hillocks and reducing the resistivity, which is suitable for an active matrixed liquid crystal display and the like in which a thin film transistor is used; its fabrication method; and a sputtering target for forming the electrode film for semiconductor devices. The electrode for semiconductor devices is made of an Al alloy containing the one or more alloying elements selected from Fe, Co, Ni, Ru, Rh and Ir, in a total amount from 0.1 to 10 At %, or one or more alloying elements selected from rare earth elements, in a total amount from 0.05 to 15 at %.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: August 21, 2012
    Assignee: Kobelco Research Institute, Inc.
    Inventors: Seigo Yamamoto, Katsutoshi Takagi, Eiji Iwamura, Kazuo Yoshikawa, Takashi Oonishi
  • Patent number: RE44239
    Abstract: Disclosed is an electrode for semiconductor devices capable of suppressing the generation of hillocks and reducing the resistivity, which is suitable for an active matrixed liquid crystal display and the like in which a thin film transistor is used; its fabrication method; and a sputtering target for forming the electrode film for semiconductor devices. The electrode for semiconductor devices is made of an Al alloy containing the one or more alloying elements selected from Fe, Co, Ni, Ru, Rh and Ir, in a total amount from 0.1 to 10 At %, or one or more alloying elements selected from rare earth elements, in a total amount from 0.05 to 15 at %.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: May 28, 2013
    Assignee: Kobelco Research Institute, Inc.
    Inventors: Seigo Yamamoto, Katsutoshi Takagi, Eiji Iwamura, Kazuo Yoshikawa, Takashi Oonishi