Patents by Inventor Ryouji Nakamura

Ryouji Nakamura 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).

  • Hardness testing apparatus
    Patent number: 7380443
    Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: June 3, 2008
    Assignee: Mitutoyo Corporation
    Inventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
  • Hardness testing apparatus
    Publication number: 20060288763
    Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.
    Type: Application
    Filed: August 30, 2006
    Publication date: December 28, 2006
    Applicant: MITUTOYO CORPORATION
    Inventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
  • Hardness testing apparatus
    Patent number: 7121136
    Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: October 17, 2006
    Assignee: Mitutoyo Corporation
    Inventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
  • Hardness testing apparatus
    Publication number: 20040134263
    Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 15, 2004
    Applicant: AKASHI CORPORATION
    Inventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi