Patents by Inventor Yuichiro Koizumi

Yuichiro Koizumi 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: 20210164566
    Abstract: An oil control ring according the present disclosure includes a pair of side rails, and a spacer expander disposed between the pair of side rails. The spacer expander includes a plurality of sets and each set includes a lug part and a rail facing part. For each set, the lug part is in contact with an inner circumferential surface of either of the pair of the side rails, and the rail facing part is provided adjacent to the lug part and faces a side surface of either of the pair of the side rails. The lug part satisfies a following condition (1): W/H?1.5 ??(1) In condition (1), W indicates a width of the lug part at a position 0.05 mm away from a highest position of the lug part in a direction towards the rail facing part, and H indicates a height difference between a highest position of a region on the rail facing part adjacent to the lug part and the highest position of the lug part.
    Type: Application
    Filed: March 29, 2019
    Publication date: June 3, 2021
    Inventors: Hiroshi SHIMIZU, Satoshi KOIZUMI, Kenichi SUDOU, Shigeru TOKUNAGA, Yuichiro TAKEZAWA
  • Patent number: 10787725
    Abstract: An object of the invention is to provide: an HEA article that has excellent homogeneity in the alloy composition and microstructure as well as significant shape controllability, using an HEA with significant mechanical strength and high corrosion resistance; a method for manufacturing the HEA article; and a product using the HEA article. There is provided an HEA article comprising: Co, Cr, Fe, Ni, and Ti elements, each element in content of 5 to 35 atomic %; more than 0 atomic % to 8 atomic % of Mo %; and remainder substances of unavoidable impurities.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: September 29, 2020
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tadashi Fujieda, Kousuke Kuwabara, Mamoru Hirota, Kinya Aota, Takahiko Kato, Akihiko Chiba, Yuichiro Koizumi, Kenta Yamanaka
  • Publication number: 20200277687
    Abstract: Provided is a heat-resistant titanium (Ti) alloy member having excellent mechanical characteristics and oxidation resistance at high temperatures and having less mechanical anisotropy, a method for producing such a titanium alloy member, and a product including such an alloy member. A titanium-based alloy member includes titanium (Ti) as a major element and at least 0.5 to 2.0 mass % of boron (B) and has a dispersion of fiber-like TiB particles precipitated in a polycrystal matrix phase, the TiB particles each having a long axis of 1 to 10 ?m and a short axis of 0.01 to 0.5 ?m or less and having an aspect ratio of 2 to 1000, the TiB particles precipitating in a crystallographically random direction in each of crystal grains of the matrix phase.
    Type: Application
    Filed: October 11, 2018
    Publication date: September 3, 2020
    Applicants: HITACHI, LTD., TOHOKU UNIVERSITY
    Inventors: Tadashi FUJIEDA, Kousuke KUWABARA, Atsuhiko OONUMA, Akihiko CHIBA, Yuichiro KOIZUMI, Kenta YAMANAKA
  • Publication number: 20190047049
    Abstract: An object of the invention is to provide: an alloy article that has excellent homogeneity in the alloy composition and microstructure as well as significant shape controllability, using an HEA with significant mechanical strength and high corrosion resistance; a method for manufacturing the alloy article; and a product using the alloy article. There is provided an alloy article comprising: Co, Cr, Fe, Ni, and Ti elements, each element in content of 5 to 35 atomic %; more than 0 atomic % to 8 atomic % of Mo %; and remainder substances of unavoidable impurities. And, ultrafine particles with an average diameter of 40 nm or less are dispersedly precipitated in matrix phase crystals of the alloy article.
    Type: Application
    Filed: October 25, 2016
    Publication date: February 14, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Tadashi FUJIEDA, Mamoru HIROTA, Kosuke KUWABARA, Kinya AOTA, Takahiko KATO, Akihiko CHIBA, Yuichiro KOIZUMI, Kenta YAMANAKA, Seiichi WATANABE
  • Publication number: 20180363104
    Abstract: An object of the invention is to provide: an HEA article that has excellent homogeneity in the alloy composition and microstructure as well as significant shape controllability, using an HEA with significant mechanical strength and high corrosion resistance; a method for manufacturing the HEA article; and a product using the HEA article. There is provided an HEA article comprising: Co, Cr, Fe, Ni, and Ti elements, each element in content of 5 to 35 atomic %; more than 0 atomic % to 8 atomic % of Mo %; and remainder substances of unavoidable impurities.
    Type: Application
    Filed: November 8, 2016
    Publication date: December 20, 2018
    Applicant: HITACHI METALS, LTD.
    Inventors: Tadashi FUJIEDA, Kousuke KUWABARA, Mamoru HIROTA, Kinya AOTA, Takahiko KATO, Akihiko CHIBA, Yuichiro KOIZUMI, Kenta YAMANAKA
  • Patent number: 4701622
    Abstract: A fluorescent screen having a sensitivity variation in which a plurality of gradations (continuous density variation) whose end edges are shifted by a predetermined distance is formed on a support of phosphor and a phosphor layer is provided thereon, and a method of manufacturing such screen.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: October 20, 1987
    Assignees: Canon Kabushiki Kaisha, Toppan Printing Co. Ltd., Kasei Optonix, Ltd.
    Inventors: Yuichiro Koizumi, Masaki Nojima, Keiji Shimiya
  • Patent number: 4479061
    Abstract: A luminance amplifier comprises excitative irradiation generating device for exciting a fluorescent body which extends continuously or discontinuously, a plate carrying said fluorecent body and a grating disposed intimately close to said plate and including a plurality of minute cells which are provided with light-diffusive walls. The minute cells are adapted to amplify the luminance in the irradiant area on the fluorescent body which is excited by the excitative irradiation.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: October 23, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Koizumi, Toshie Kaneko