Patents by Inventor Shota Hayashi

Shota Hayashi 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: 10766069
    Abstract: There is disclosed a method for manufacturing an electrode by pressing and sintering a mixed powder of a solid solution powder of Cr and a heat-resistant element, which contains Cr and the heat-resistant element in a ratio such that Cr is greater than the heat-resistant element by weight, a Cu powder, and a low melting metal powder (Bi, Sn, Se, Pb, etc.). The low melting metal powder of 0.30 weight % to 0.50 weight % is added to a mixed powder of a solid solution powder of Cr and the heat-resistant element and the Cu powder, and then a mixed powder prepared by adding the low melting metal powder is sintered at a temperature of from 1010° C. to 1035° C. As the low melting metal powder, there is used a powder having a median size of from 5 ?m to 20 ?m.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: September 8, 2020
    Assignee: MEIDENSHA CORPORATION
    Inventors: Shota Hayashi, Keita Ishikawa, Kenta Yamamura, Kosuke Hasegawa, Hideaki Fukuda, Akira Sano
  • Publication number: 20200262113
    Abstract: A fluid device composite member includes: a silicone member that includes a body part which is made of silicone and which has a flow-path-defining section for defining a flow path on one surface of the body part, and that includes barrier layer having hydrophilicity or hydrophobicity disposed in at least a portion of the flow-path-defining section; and a resin substrate disposed on another surface of the body part opposite to the one surface. This method for manufacturing the fluid device composite member includes a layered body manufacturing step in which a liquid silicone material is placed on a surface of the resin substrate, and the liquid silicone material is cured at a temperature of 100° C. or less to obtain a layered body in which a silicone cured product is bonded to the resin substrate.
    Type: Application
    Filed: May 5, 2020
    Publication date: August 20, 2020
    Applicant: Sumitomo Riko Company Limited
    Inventors: Katsumi OKASHITA, Shota HAYASHI
  • Patent number: 10614969
    Abstract: Disclosed is a method for manufacturing an electrode material (1), wherein the electrode material includes: a center part (2) containing Cu, Cr and a heat resistant element and having superior large-current interruption and capacitor switching capabilities; and an outer circumferential part (3) disposed on an outer circumference of the center part (2). The outer circumferential part (3) contains Cu and Cr and has superior withstand voltage capability. The electrode material (1) is manufactured by molding a solid solution powder of Cr and the heat resistant element, molding a Cr powder integrally around an outer circumference of the molded body of the solid solution powder and infiltrating the integrally molded body with Cu etc.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 7, 2020
    Assignee: MEIDENSHA CORPORATION
    Inventors: Keita Ishikawa, Shota Hayashi, Hideaki Fukuda, Kosuke Hasegawa, Kenta Yamamura
  • Publication number: 20190362910
    Abstract: Disclosed is a method for manufacturing an electrode material (1), wherein the electrode material includes: a center part (2) containing Cu, Cr and a heat resistant element and having superior large-current interruption and capacitor switching capabilities; and an outer circumferential part (3) disposed on an outer circumference of the center part (2). The outer circumferential part (3) contains Cu and Cr and has superior withstand voltage capability. The electrode material (1) is manufactured by molding a solid solution powder of Cr and the heat resistant element, molding a Cr powder integrally around an outer circumference of the molded body of the solid solution powder and infiltrating the integrally molded body with Cu etc.
    Type: Application
    Filed: November 8, 2017
    Publication date: November 28, 2019
    Applicant: MEIDENSHA CORPORATION
    Inventors: Keita ISHIKAWA, Shota HAYASHI, Hideaki FUKUDA, Kosuke HASEGAWA, Kenta YAMAMURA
  • Patent number: 10490367
    Abstract: It is a method for manufacturing an electrode material containing Cu, Cr, a heat-resistant element, and a low melting metal. A Cr powder and a heat-resistant element powder are mixed together in a ratio such that the Cr is greater than the heat-resistant element by weight. The mixed powder of the heat-resistant element and the Cr powder is baked. A MoCr solid solution obtained by the baking and containing a solid solution of the heat-resistant element and the Cr is pulverized and then classified. The classified MoCr solid solution powder, a Cu powder, and a low-melting metal powder are mixed together, followed by sintering at a temperature that is 1010° C. or higher and is lower than 1038° C., thereby obtaining the electrode material.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: November 26, 2019
    Assignee: MEIDENSHA CORPORATION
    Inventors: Shota Hayashi, Keita Ishikawa, Kenta Yamamura, Kosuke Hasegawa
  • Publication number: 20190299285
    Abstract: There is disclosed a method for manufacturing an electrode by pressing and sintering a mixed powder of a solid solution powder of Cr and a heat-resistant element, which contains Cr and the heat-resistant element in a ratio such that Cr is greater than the heat-resistant element by weight, a Cu powder, and a low melting metal powder (Bi, Sn, Se, Pb, etc.). The low melting metal powder of 0.30 weight % to 0.50 weight % is added to a mixed powder of a solid solution powder of Cr and the heat-resistant element and the Cu powder, and then a mixed powder prepared by adding the low melting metal powder is sintered at a temperature of from 1010° C. to 1035° C. As the low melting metal powder, there is used a powder having a median size of from 5 ?m to 20 ?m.
    Type: Application
    Filed: March 15, 2017
    Publication date: October 3, 2019
    Applicant: MEIDENSHA CORPORATION
    Inventors: Shota HAYASHI, Keita ISHIKAWA, Kenta YAMAMURA, Kosuke HASEGAWA, Hideaki FUKUDA, Akira SANO
  • Patent number: 10361039
    Abstract: It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: July 23, 2019
    Assignee: MEIDENSHA CORPORATION
    Inventors: Keita Ishikawa, Kenta Yamamura, Kosuke Hasegawa, Shota Hayashi, Takaaki Furuhata
  • Patent number: 10262819
    Abstract: Disclosed is a vacuum circuit breaker (1) including a vacuum interrupter (3) accommodated in a ground tank (2) filled with insulating gas. At least one of a fixed electrode (10) and a movable electrode (11) of the vacuum interrupter (3) uses an electrode material in which particles containing a solid solution of a heat resistant element and Cr are finely and uniformly dispersed and in which Cu textures as a high conductive component are finely and uniformly dispersed. The electrode material contains 20 to 70% by weight of Cu, 1.5 to 64% by weight of Cr and 6 to 76% by weight of the heat resistant element relative to a weight of the electrode material. The particles of the solid solution in the electrode material have an average particle size of 20 ?m or smaller.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: April 16, 2019
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kazuhiro Nagatake, Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Kosuke Hasegawa
  • Publication number: 20190091905
    Abstract: To provide a method for manufacturing a composite member including an aluminum die cast member and a polymer member firmly bonded by removing a carbide film on the surface of the aluminum die cast member to even the surface layer. The method includes: a melting step of melting a surface layer of a joint surface of the aluminum die cast member by irradiating the joint surface with a laser, the joint surface being joined with the polymer member; and a combining step of integrally molding a polymeric material on the joint surface. The method may have a removal step of removing the carbide film present on the joint surface by irradiating the joint surface with the laser before the melting step, and a modification step of irradiating the joint surface with plasma to impart a hydroxyl group to the joint surface after the melting step.
    Type: Application
    Filed: July 3, 2018
    Publication date: March 28, 2019
    Applicants: Sumitomo Riko Company Limited, SumiRiko Fine Elastomer, Ltd.
    Inventors: Katsumi Okashita, Shota Hayashi, Yasuyuki Miwa, Takahiro Shinozaki, Yuko Ishikuma
  • Patent number: 10153098
    Abstract: It is a method for producing an electrode material containing Cu, Cr and a heat-resistant element. A heat-resistant element powder and a Cr powder are mixed together such that the heat-resistant element is less than the Cr by weight. A resulting mixed powder is baked. A resulting sintered body containing a solid solution of the heat-resistant element and the Cr is pulverized, and a resulting solid solution powder is classified, to have a particle size of 200 ?m or less. 10-60 parts by weight of the classified solid solution powder and 90-40 parts by weight of a Cu powder are mixed together, followed by sintering to obtain the electrode material. If a low melting metal powder having a median size of 5-40 ?m is mixed with a mixed powder of the solid solution powder and the Cu powder, the deposition resistance property is further improved.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: December 11, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Shota Hayashi, Keita Ishikawa, Takaaki Furuhata, Kenta Yamamura, Kosuke Hasegawa
  • Patent number: 10086433
    Abstract: A process for producing an electrode material by infiltrating a highly conductive metal such as Cu into a porous object containing heat-resistant elements. Before an infiltration step in which the highly conductive metal is infiltrated, a HIP treatment is given to a powder containing the heat-resistant elements (or to a molded object obtained by molding a powder containing the heat-resistant elements). The composition is controlled so that the HIP treatment yields a porous object which has a degree of filling of 70% or higher, more preferably 75% or higher. The highly conductive metal is infiltrated into the porous object having the controlled composition.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: October 2, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Nobutaka Suzuki
  • Publication number: 20180247780
    Abstract: Disclosed is a vacuum circuit breaker (1) including a vacuum interrupter (3) accommodated in a ground tank (2) filled with insulating gas. At least one of a fixed electrode (10) and a movable electrode (11) of the vacuum interrupter (3) uses an electrode material in which particles containing a solid solution of a heat resistant element and Cr are finely and uniformly dispersed and in which Cu textures as a high conductive component are finely and uniformly dispersed. The electrode material contains 20 to 70% by weight of Cu, 1.5 to 64% by weight of Cr and 6 to 76% by weight of the heat resistant element relative to a weight of the electrode material. The particles of the solid solution in the electrode material have an average particle size of 20 ?m or smaller.
    Type: Application
    Filed: August 23, 2016
    Publication date: August 30, 2018
    Applicant: MEIDENSHA CORPORATION
    Inventors: Kazuhiro NAGATAKE, Kaoru KITAKIZAKI, Keita ISHIKAWA, Shota HAYASHI, Kosuke HASEGAWA
  • Patent number: 10058923
    Abstract: What is disclosed is an electrode material including a sintered body containing a heat resistant element and Cr and being infiltrated with a highly conductive material. A powder mixture of a heat resistant element powder and a Cr powder is subjected to a provisional sintering in advance, thereby causing solid phase diffusion of the heat resistant element and Cr. After a Mo—Cr solid solution obtained by the provisional sintering is pulverized, the pulverized Mo—Cr solid solution powder is molded and sintered. A sintered body obtained by sintering is subjected to a HIP treatment. The highly conductive metal is disposed on the sintered body after the HIP treatment, and infiltrated into the sintered body by heating at a predetermined temperature. By conducting the HIP treatment, the withstand voltage capability and current-interrupting capability of the electrode material are improved.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: August 28, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Keita Ishikawa, Kaoru Kitakizaki, Shota Hayashi
  • Publication number: 20180240612
    Abstract: It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu.
    Type: Application
    Filed: August 10, 2016
    Publication date: August 23, 2018
    Applicant: MEIDENSHA CORPORATION
    Inventors: Keita ISHIKAWA, Kenta YAMAMURA, Kosuke HASEGAWA, Shota HAYASHI, Takaaki FURUHATA
  • Publication number: 20180182573
    Abstract: It is a method for manufacturing an electrode material containing Cu, Cr, a heat-resistant element, and a low melting metal. A Cr powder and a heat-resistant element powder are mixed together in a ratio such that the Cr is greater than the heat-resistant element by weight. The mixed powder of the heat-resistant element and the Cr powder is baked. A MoCr solid solution obtained by the baking and containing a solid solution of the heat-resistant element and the Cr is pulverized and then classified. The classified MoCr solid solution powder, a Cu powder, and a low-melting metal powder are mixed together, followed by sintering at a temperature that is 1010° C. or higher and is lower than 1038° C., thereby obtaining the electrode material.
    Type: Application
    Filed: June 21, 2016
    Publication date: June 28, 2018
    Applicant: MEIDENSHA CORPORATION
    Inventors: Shota HAYASHI, Keita ISHIKAWA, Kenta YAMAMURA, Kosuke HASEGAWA
  • Publication number: 20180174771
    Abstract: It is a method for producing an electrode material containing Cu, Cr and a heat-resistant element. A heat-resistant element powder and a Cr powder are mixed together in a ratio such that the heat-resistant element is less than the Cr by weight. A mixed powder of the heat-resistant element powder and the Cr powder is baked. A sintered body obtained by the baking and containing a solid solution of the heat-resistant element and the Cr is pulverized, and a solid solution powder obtained by the pulverizing is classified, to have a particle size of 200 ?m or less. 10-60 parts by weight of the classified solid solution powder and 90-40 parts by weight of a Cu powder are mixed together, followed by sintering to obtain the electrode material. If a low melting metal powder having a median size of 5-40 ?m is mixed with a mixed powder of the solid solution powder and the Cu powder, the deposition resistance property is further improved.
    Type: Application
    Filed: April 26, 2016
    Publication date: June 21, 2018
    Applicant: MEIDENSHA CORPORATION
    Inventors: Shota HAYASHI, Keita ISHIKAWA, Takaaki FURUHATA, Kenta YAMAMURA, Kosuke HASEGAWA
  • Patent number: 9959986
    Abstract: A method for producing an electrode material, provided to involve: (i) a provisional sintering step of sintering a mixed powder containing a powder of a heat resistant element and a powder of Cr to obtain a solid solution where the heat resistant element and Cr are dissolved; (ii) a pulverizing step of pulverizing the solid solution to obtain a powder; (iii) a main sintering step of sintering a molded body obtained by molding the powder of the solid solution, to produce a sintered body; and (iv) a Cu infiltration step of infiltrating the sintered body with Cu.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: May 1, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Nobutaka Suzuki, Kosuke Hasegawa
  • Publication number: 20170282249
    Abstract: What is disclosed is an electrode material including a sintered body containing a heat resistant element and Cr and being infiltrated with a highly conductive material. A powder mixture of a heat resistant element powder and a Cr powder is subjected to a provisional sintering in advance, thereby causing solid phase diffusion of the heat resistant element and Cr. After a Mo—Cr solid solution obtained by the provisional sintering is pulverized, the pulverized Mo—Cr solid solution powder is molded and sintered. A sintered body obtained by sintering is subjected to a HIP treatment. The highly conductive metal is disposed on the sintered body after the HIP treatment, and infiltrated into the sintered body by heating at a predetermined temperature. By conducting the HIP treatment, the withstand voltage capability and current-interrupting capability of the electrode material are improved.
    Type: Application
    Filed: August 27, 2015
    Publication date: October 5, 2017
    Applicant: MEIDENSHA CORPORATION
    Inventors: Keita ISHIKAWA, Kaoru KITAKIZAKI, Shota HAYASHI
  • Publication number: 20170232520
    Abstract: A process for producing an electrode material by infiltrating a highly conductive metal such as Cu into a porous object containing heat-resistant elements. Before an infiltration step in which the highly conductive metal is infiltrated, a HIP treatment is given to a powder containing the heat-resistant elements (or to a molded object obtained by molding a powder containing the heat-resistant elements). The composition is controlled so that the HIP treatment yields a porous object which has a degree of filling of 70% or higher, more preferably 75% or higher. The highly conductive metal is infiltrated into the porous object having the controlled composition.
    Type: Application
    Filed: May 29, 2015
    Publication date: August 17, 2017
    Applicant: MEIDENSHA CORPORATION
    Inventors: Kaoru KITAKIZAKI, Keita ISHIKAWA, Shota HAYASHI, Nobutaka SUZUKI
  • Patent number: 9724759
    Abstract: A method for producing an electrode material, involving: (i) a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak corresponding to the heat resistant element, which are observed by X ray diffraction measurement made on the powder of the solid solution, disappears; (ii) a step of molding the powder of the solid solution to obtain a molded body and then sintering the molded body to produce a sintered body; and (iii) a Cu infiltration step of infiltrating the sintered body with Cu.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: August 8, 2017
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Nobutaka Suzuki, Kosuke Hasegawa