Patents by Inventor Yoshimasa URESHINO

Yoshimasa URESHINO 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).

  • Spheroidal graphite cast iron
    Patent number: 11466349
    Abstract: A spheroidal graphite cast iron having an excellent impact strength at low temperature and a method for producing the same are provided. The present disclosure relates to the spheroidal graphite cast iron comprising: C: 3.5 mass % to 4.2 mass %; Si: 2.0 mass % to 2.8 mass %; Mn: 0.2 mass % to 0.4 mass %; Cu: 0.1 mass % to 0.7 mass %; Mg: 0.02 mass % to 0.06 mass %; Cr: 0.01 mass % to 0.15 mass %; and the balance: Fe and inevitable impurities, wherein Mn+Cr+Cu is 0.431 mass % to 1.090 mass %, a graphite nodule count is 230/mm2 or less, and a pearlite fraction is 30% to 85%.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: October 11, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.
    Inventors: Takumi Hijii, Yoshimasa Ureshino, Hitoshi Sakuma, Gou Nakamura, Zhong-zhi Zhang
  • SPHEROIDAL GRAPHITE CAST IRON
    Publication number: 20190211426
    Abstract: A spheroidal graphite cast iron having an excellent impact strength at low temperature and a method for producing the same are provided. The present disclosure relates to the spheroidal graphite cast iron comprising: C: 3.5 mass % to 4.2 mass %; Si: 2.0 mass % to 2.8 mass %; Mn: 0.2 mass % to 0.4 mass %; Cu: 0.1 mass % to 0.7 mass %; Mg: 0.02 mass % to 0.06 mass %; Cr: 0.01 mass % to 0.15 mass %; and the balance: Fe and inevitable impurities, wherein Mn+Cr+Cu is 0.431 mass % to 1.090 mass %, a graphite nodule count is 230/mm2 or less, and a pearlite fraction is 30% to 85%.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 11, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.
    Inventors: Takumi Hijii, Yoshimasa Ureshino, Hitoshi Sakuma, Gou Nakamura, Zhong-zhi Zhang
  • Steel for high-strength bolts which has excellent delayed fracture resistance and bolt formability, and bolt
    Patent number: 10060015
    Abstract: To provide a steel for high-strength bolts, which can exhibit the sufficient delayed fracture resistance under the severe environment, and also has excellent bolt formability. The steel for high-strength bolts of the present invention includes C: 0.10 to 0.30%; and Ni: 0.4 to 0.7%, with the chemical composition being appropriately adjust, and satisfies the following formulas (1) and (2): 0.85?[C]+[Si]/7+[Mn]/5+[Ni]/20+[Cr]/9+[Mo]/2?1.3??(1) [C]?(0.07×[Mo]+0.20×[V])?0.20??(2).
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: August 28, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Yosuke Matsumoto, Atsushi Inada, Masamichi Chiba, Yoshimasa Ureshino, Reiko Kato
  • STEEL FOR HIGH-STRENGTH BOLTS WHICH HAS EXCELLENT DELAYED FRACTURE RESISTANCE AND BOLT FORMABILITY, AND BOLT
    Publication number: 20160230260
    Abstract: To provide a steel for high-strength bolts, which can exhibit the sufficient delayed fracture resistance under the severe environment, and also has excellent bolt formability. The steel for high-strength bolts of the present invention includes C: 0.10 to 0.30%; and Ni: 0.4 to 0.7%, with the chemical composition being appropriately adjust, and satisfies the following formulas (1) and (2): 0.85?[C]+[Si]/7+[Mn]/5+[Ni]/20+[Cr]/9+[Mo]/2?1.3??(1) [C]?(0.07×[Mo]+0.20×[V])?0.
    Type: Application
    Filed: September 16, 2014
    Publication date: August 11, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Yosuke MATSUMOTO, Atsushi INADA, Masamichi CHIBA, Yoshimasa URESHINO, Reiko KATO