Patents by Inventor Chihiro ASAI

Chihiro ASAI 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: 12018355
    Abstract: A method of manufacturing an aluminum alloy forged material from a mixture containing an aluminum scrap, an aluminum virgin metal, and an additive element includes the following steps: a heating and melting step of heating and melting the mixture, a forging step of forging the mixture after heating and melting, and an aging treatment step of performing aging treatment on a material after the forging step under a condition that an aging temperature and an aging time are as follows: (aging temperature, aging time)=within a range of a region surrounded by (185, 4), (185, 7), (200, 1), and (200, ?2/25x+8).
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: June 25, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Chihiro Asai, Takehito Kobayashi, Hajime Kawabata
  • Patent number: 11739404
    Abstract: An object of the present disclosure is to provide a method for manufacturing an aluminum alloy plastically-processed article, capable of preventing a burning crack from occurring due to processing heat generated during plasticity processing while maintaining a solution-treatment temperature of an aluminum alloy material for ensuring a mechanical strength thereof. A method for manufacturing an aluminum alloy plastically-processed article, includes a step of performing a solution treatment for an aluminum alloy material by heating and maintaining the aluminum alloy material at a solution-treatment temperature, a step of performing plasticity processing for the aluminum alloy material subjected to the solution treatment, and steps of cooling the plastically-processed aluminum alloy material at a time at which the step of the plasticity processing is completed, and aging the cooled aluminum alloy material.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: August 29, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KOBE STEEL, LTD.
    Inventors: Kazuhiro Suzuki, Takehito Kobayashi, Masayuki Isogawa, Katsuya Yoshida, Chihiro Asai, Masahiro Yamada, Masayuki Hori
  • Patent number: 11535918
    Abstract: An object of the present disclosure is to provide a method for manufacturing an aluminum alloy plastically-processed article, capable of preventing a burning crack from occurring due to processing heat generated during plasticity processing while maintaining a solution-treatment temperature of an aluminum alloy material for ensuring a mechanical strength thereof. A method for manufacturing an aluminum alloy plastically-processed article, includes a step of performing a solution treatment for an aluminum alloy material by heating and maintaining the aluminum alloy material at a solution-treatment temperature, a step of performing plasticity processing for the aluminum alloy material subjected to the solution treatment, and steps of cooling the plastically-processed aluminum alloy material at a time at which the step of the plasticity processing is completed, and aging the cooled aluminum alloy material.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: December 27, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KOBE STEEL, LTD.
    Inventors: Kazuhiro Suzuki, Takehito Kobayashi, Masayuki Isogawa, Katsuya Yoshida, Chihiro Asai, Masahiro Yamada, Masayuki Hori
  • Publication number: 20220290281
    Abstract: A method of manufacturing an aluminum alloy forged material from a mixture containing an aluminum scrap, an aluminum virgin metal, and an additive element includes the following steps: a heating and melting step of heating and melting the mixture, a forging step of forging the mixture after heating and melting, and an aging treatment step of performing aging treatment on a material after the forging step under a condition that an aging temperature and an aging time are as follows: (aging temperature, aging time)=within a range of a region surrounded by (185, 4), (185, 7), (200, 1), and (200, ?2/25x+8).
    Type: Application
    Filed: February 11, 2022
    Publication date: September 15, 2022
    Inventors: Chihiro ASAI, Takehito KOBAYASHI, Hajime KAWABATA
  • Publication number: 20210180167
    Abstract: An object of the present disclosure is to provide a method for manufacturing an aluminum alloy plastically-processed article, capable of preventing a burning crack from occurring due to processing heat generated during plasticity processing while maintaining a solution-treatment temperature of an aluminum alloy material for ensuring a mechanical strength thereof. A method for manufacturing an aluminum alloy plastically-processed article, includes a step of performing a solution treatment for an aluminum alloy material by heating and maintaining the aluminum alloy material at a solution-treatment temperature, a step of performing plasticity processing for the aluminum alloy material subjected to the solution treatment, and steps of cooling the plastically-processed aluminum alloy material at a time at which the step of the plasticity processing is completed, and aging the cooled aluminum alloy material.
    Type: Application
    Filed: November 17, 2020
    Publication date: June 17, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhiro SUZUKI, Takehito KOBAYASHI, Masayuki ISOGAWA, Katsuya YOSHIDA, Chihiro ASAI, Masahiro YAMADA