Patents by Inventor Yu Kawakubo

Yu Kawakubo 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).

  • Surface reference detecting mechanism and hardness tester
    Patent number: 11719610
    Abstract: An indenter reference that is brought into contact with an axial second side surface of a sample which is arranged further toward an axial first side than an indenter, the indenter reference serving as a position reference for the indenter; a holder that detachably holds the indenter reference and is coupled with the indenter reference; an indenter position detector that couples with the holder and detects a relative position of the indenter with respect to the indenter reference; a regulator that allows displacement between a first position that regulates movement of the indenter reference with respect to the holder and a second position where the indenter reference can be removed from the holder; and a biasing portion that biases the regulator to be kept at the first position.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: August 8, 2023
    Assignee: MITUTOYO CORPORATION
    Inventor: Yu Kawakubo
  • SURFACE REFERENCE DETECTING MECHANISM AND HARDNESS TESTER
    Publication number: 20220170834
    Abstract: An indenter reference that is brought into contact with an axial second side surface of a sample which is arranged further toward an axial first side than an indenter, the indenter reference serving as a position reference for the indenter; a holder that detachably holds the indenter reference and is coupled with the indenter reference; an indenter position detector that couples with the holder and detects a relative position of the indenter with respect to the indenter reference; a regulator that allows displacement between a first position that regulates movement of the indenter reference with respect to the holder and a second position where the indenter reference can be removed from the holder; and a biasing portion that biases the regulator to be kept at the first position.
    Type: Application
    Filed: November 19, 2021
    Publication date: June 2, 2022
    Applicant: MITUTOYO CORPORATION
    Inventor: Yu KAWAKUBO
  • Display device for hardness tester
    Patent number: D848867
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: May 21, 2019
    Assignee: MITUTOYO CORPORATION
    Inventors: Sadayuki Matsumiya, Yoshiro Asano, Masaru Kawazoe, Fumihiko Koshimizu, Shigeru Ohtani, Yu Sugai, Yu Kawakubo