Patents by Inventor Kouhei Oka

Kouhei Oka 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).

  • Hollow structure body and vehicular component
    Patent number: 9783244
    Abstract: According to one aspect of the present invention, there is provided a hollow structure body having a hollow structure, in which a first shaped product constituted by a first fiber-reinforced resin material containing first reinforcing fibers and a first matrix resin and a second shaped product constituted by a second fiber-reinforced resin material containing second reinforcing fibers and a second matrix resin are combined, wherein in an arbitrary cross section in a direction perpendicular to an axial direction of the hollow structure, a ratio Sc/St between compressive strength Sc of a structure in the first shaped product and tensile strength St of a structure in the second shaped product satisfies formula (1): (?c/?t)*(Hc/Ht)<(Sc/St)<(?t/?c)*(Hc/Ht)??formula (1).
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: October 10, 2017
    Assignee: Teijin Limited
    Inventors: Jianwei Shi, Hiroyuki Shimizu, Kouhei Oka
  • Hollow Structure Body and Vehicular Component
    Publication number: 20160052565
    Abstract: According to one aspect of the present invention, there is provided a hollow structure body having a hollow structure, in which a first shaped product constituted by a first fiber-reinforced resin material containing first reinforcing fibers and a first matrix resin and a second shaped product constituted by a second fiber-reinforced resin material containing second reinforcing fibers and a second matrix resin are combined, wherein in an arbitrary cross section in a direction perpendicular to an axial direction of the hollow structure, a ratio Sc/St between compressive strength Sc of a structure in the first shaped product and tensile strength St of a structure in the second shaped product satisfies formula (1): (?c/?t)*(Hc/Ht)<(Sc/St)<(?t/?c)*(Hc/Ht)??formula (1).
    Type: Application
    Filed: March 13, 2015
    Publication date: February 25, 2016
    Applicant: TEIJIN LIMITED
    Inventors: Jianwei Shi, Hiroyuki Shimizu, Kouhei Oka