Patents by Inventor Tetsuo Sakai

Tetsuo Sakai 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: 20220173629
    Abstract: A coil includes first and second segment conductors, and a welded metal portion where the first and second segment conductors are welded. The first and second segment conductors each include: a fixed portion held in a stator core to extend in a first direction; an inclined portion protruding from the stator core, extending in a second direction inclined with respect to the first direction, and including side surfaces covered with an insulative coating film; and a weld portion that is at a tip of the inclined portion and includes a first surface located within an extension plane in the second direction of one surface of the side surfaces, a second surface contacting the first surface, and a third surface contacting the second surface. The welded metal portion contacts the first, second, and third surfaces of the first segment conductor, and the first and second surfaces of the second segment conductor.
    Type: Application
    Filed: February 17, 2022
    Publication date: June 2, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Masakazu KIKAWADA, Tetsuo SAKAI
  • Publication number: 20220109158
    Abstract: An electrode binder resin composition containing a polyamic acid, a water-soluble polymer other than the polyamic acid, and a solvent. The use of the electrode binder resin composition improves cyclic characteristics.
    Type: Application
    Filed: May 23, 2019
    Publication date: April 7, 2022
    Inventors: Takeshige NAKAYAMA, Tetsuo SAKAI, Masanori MORISHITA
  • Publication number: 20220085374
    Abstract: An electrode for an all-solid secondary battery, including an electrode active material layer comprising an electrode active material and a binder resin on a current collector, the binder resin including a polyimide resin, and the electrode active material layer does not contain an electrolyte; and an all-solid secondary battery, including the electrode as a positive electrode or a negative electrode.
    Type: Application
    Filed: December 25, 2019
    Publication date: March 17, 2022
    Inventors: Takeshige NAKAYAMA, Masanori MORISHITA, Tetsuo SAKAI
  • Patent number: 11216934
    Abstract: According to one embodiment, a determination device includes a processor. The processor inputs a first image to a first model when the first image is input to the processor. The first image is of a welding spot when welding. The first model is for determining whether or not an image is appropriate. The processor determines an appropriateness of a weld by using the first image when the first image is determined to be appropriate by the first model, and outputs information for correcting an imaging condition of the welding spot when the first image is determined to be inappropriate by the first model.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: January 4, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsuo Sakai, Taisuke Washitani, Yasutomo Shiomi
  • Patent number: 11201326
    Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: December 14, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Akihiro Yamano, Masanori Morishita, Tetsuo Sakai, Hideya Yoshitake
  • Publication number: 20210379698
    Abstract: A method for welding copper-including members includes laser-welding a first member that includes copper, and a second member that includes copper and is located adjacent to the first member. A welding surface of the first member and a welding surface of the second member are melted by moving an irradiation position of a laser to turn in a spiral shape while approaching a center of the spiral when irradiating the laser on the welding surface of the first member and the welding surface of the second member.
    Type: Application
    Filed: August 19, 2021
    Publication date: December 9, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Tetsuo SAKAI, Masakazu KIKAWADA
  • Publication number: 20210301146
    Abstract: The present invention provides a zirconium-containing alcohol solution including zirconium oxyacetate, a C1-3 carboxylic acid or a C1-3 carboxylate, water, and an alcohol-based solvent, the zirconium-containing alcohol solution being such that the transmittance for light of a wavelength of 380 nm after heating for 50 hours at a temperature of 40° C. is 90-100%.
    Type: Application
    Filed: August 26, 2019
    Publication date: September 30, 2021
    Applicant: DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.
    Inventors: Tadahiro NIWA, Sadahiro YAGISHITA, Masanori MORISHITA, Tetsuo SAKAI
  • Patent number: 11088391
    Abstract: Provided is a lithium ion battery whose manufacturing process is simple and which has high energy density and heat resistance.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: August 10, 2021
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, MURATA MANUFACTURING CO., LTD.
    Inventors: Akihiro Yamano, Tetsuo Sakai, Masahiro Yanagida, Masanori Morishita, Masashi Higuchi
  • Patent number: 10946481
    Abstract: According to one embodiment, a laser processing device includes a light irradiation section, and an optical element. The optical element includes a first transparent member provided via a gap with a tip of the light irradiation section, and a second transparent member. The first transparent member includes a first surface opposed to the tip of the light irradiation section, and a second surface provided so as to be connected to the first surface. The second transparent member includes a flat surface and a convex surface, the flat surface being provided so as to be opposed to the second surface of the first transparent member, the light passed through the first transparent member passing through the convex surface. An optical axis of the laser beam passing through the first surface and an optical axis passing through the convex surface are different from each other.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: March 16, 2021
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Ohno, Kota Nomura, Tetsuo Sakai, Itaru Chida
  • Patent number: 10847279
    Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: November 24, 2020
    Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Tatsuya Kubo, Toshikatsu Kojima, Tetsuo Sakai, Akihiro Yamano, Masahiro Yanagida
  • Publication number: 20200357112
    Abstract: According to one embodiment, a determination device includes a processor. The processor inputs a first image to a first model when the first image is input to the processor. The first image is of a welding spot when welding. The first model is for determining whether or not an image is appropriate. The processor determines an appropriateness of a weld by using the first image when the first image is determined to be appropriate by the first model, and outputs information for correcting an imaging condition of the welding spot when the first image is determined to be inappropriate by the first model.
    Type: Application
    Filed: April 22, 2020
    Publication date: November 12, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsuo SAKAI, Taisuke WASHITANI, Yasutomo SHIOMI
  • Patent number: 10797323
    Abstract: A current collector included in a fuel cell, the fuel cell including a membrane electrode assembly including a solid polymer electrolyte layer and a pair of electrode layers formed to sandwich the solid polymer electrolyte layer, the current collector stacked on each electrode layer, and a gas flow path for supply of a gas to each electrode layer, the current collector including a metal porous body which is stacked on the electrode layer, has a flowing gas supplied to the electrode layer, and is rendered conducting to the electrode layer, and the metal porous body including an electrically conductive layer containing electrically conductive particles fixed to a corrosion-resistant and water-repellent resin at least on a side of the electrode layer.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: October 6, 2020
    Assignees: Sumitomo Electric Industries, Ltd., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Kazuki Okuno, Takahiro Higashino, Masatoshi Majima, Tsutomu Iwaki, Masahiro Yanagida, Tetsuo Sakai
  • Publication number: 20200282496
    Abstract: A welding method according to an embodiment includes a preparation process and a welding process. A first welding material and a second welding material are prepared in the preparation process. The first welding material and the second welding material are welded in the welding process by irradiating a laser beam on at least one of the first welding material or the second welding material. At least one of the first welding material or the second welding material includes a first portion and a second portion. A laser absorptance of the second portion is higher than a laser absorptance of the first portion. The first welding material and the second welding material are welded in the welding process by irradiating the laser beam on the second portion.
    Type: Application
    Filed: February 18, 2020
    Publication date: September 10, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tetsuo SAKAI
  • Publication number: 20200274114
    Abstract: A battery includes a casing, a terminal, an electrode assembly, a collector, and a joint. The terminal is supported by the casing. The electrode assembly is housed in the casing and includes an electrode pair of a sheet form having different polarities from each other and a separator located between the electrode pair, the electrode pair and the separator laminated and wound around an axis. The collector is located at an axial end of the electrode assembly, electrically connected to the terminal, and includes a plurality of collector tabs. The collector tabs are part of one of the electrodes and laminated on each other with no other electrode and the separator placed in-between. The joint joins fringes of the laminated collector tabs.
    Type: Application
    Filed: October 29, 2018
    Publication date: August 27, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hirokiyo MAMYODA, Masahiro MURATA, Naoki IWAMURA, Nobuyasu NEGISHI, Takashi OBARA, Tetsuo SAKAI
  • Publication number: 20200262007
    Abstract: A laser welding method of a die cast member includes forming a first melted portion by irradiating a first laser beam on a planned welding portion including a contact surface between a first member and a second member, and welding the first member and the second member by forming a second melted portion by irradiating a second laser beam on the planned welding portion after the first melted portion is formed; the first member includes a metal; and the second member is formed by die casting. A width of the first melted portion is not more than half of a width of the second melted portion. A depth of the first melted portion is deeper than a depth of the second melted portion.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 20, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tetsuo SAKAI
  • Publication number: 20200044251
    Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.
    Type: Application
    Filed: October 8, 2019
    Publication date: February 6, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI, Hideya YOSHITAKE
  • Patent number: 10532427
    Abstract: An optical processing head capable of reducing the energy loss at the time of optical processing is disclosed. The optical processing head includes a first optical element that converts light emitted by a light source into first parallel light, a second optical element that is arranged downstream of the first optical element and converts the first parallel light into first divergent light, a third optical element that is arranged downstream of the second optical element and converts the first divergent light into second parallel light, and a fourth optical element that is arranged downstream of the third optical element and converts the second parallel light into convergent light which is condensed on the processing surface side.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: January 14, 2020
    Assignee: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi Ohno, Tetsuo Sakai, Mitsuo Sasaki, Kazuyuki Masukawa, Takashi Obara, Yuji Sasaki, Satoshi Tsuno
  • Publication number: 20190283175
    Abstract: According to an embodiment of the invention, a laser processing method includes a first irradiation process and a second irradiation process. In the first irradiation process, a first laser light is irradiated on a first region of a processing object including a metal. A first output value of the first laser light is 3000 W or more. In the second irradiation process, a second laser light is irradiated on the first region. A second output value of the second laser light is not less than 60% and not more than 70% of the first output value.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 19, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tetsuo Sakai, Yasutomo Shiomi
  • Publication number: 20190207210
    Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.
    Type: Application
    Filed: March 11, 2019
    Publication date: July 4, 2019
    Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Tatsuya KUBO, Toshikatsu KOJIMA, Tetsuo SAKAI, Akihiro YAMANO, Masahiro YANAGIDA
  • Publication number: 20190148778
    Abstract: An object of the present invention is to provide a method of manufacturing a high capacity lithium ion battery device by safe and simple doping operation. A method of manufacturing a lithium ion battery device comprising a positive electrode and a negative electrode which are laminated with each other, wherein an active material used on the positive electrode is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, the method comprising: a step of forming through-holes penetrating in a thickness direction of the positive electrodes and the negative electrodes, a step of laminating the positive electrodes with the negative electrode and disposing a lithium ion feeding source on at least one side of a laminating direction, and a step of allowing lithium derived from the lithium ion feeding source to be carried on the positive electrode and the negative electrode.
    Type: Application
    Filed: October 11, 2018
    Publication date: May 16, 2019
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI