Patents by Inventor Mituru Oda

Mituru Oda 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).

  • Impression forming mechanism and method, and hardness testing apparatus and method
    Patent number: 6725708
    Abstract: A hardness testing apparatus comprises a sample table mounting a sample thereon, a loading arm having an indentor at its free end, a loading arm operation controlling unit, an electromagnetic brake. When the same is elevated and brought into contact with the indentor, the loading arm is moved upwardly. The loading arm operation controlling unit calculates a predetermined force to be applied to the sample in response to a displacement from a reference position of the loading arm when and after the sample is brought into contact with the indentor. The loading arm is moved upwardly such that a predetermined force calculated by the loading arm operating controlling unit is applied to the sample. The electromagnetic brake controls an elevating operation of the sample table. A direction of a current supplied to the electromagnetic brake is inverted at a predetermined timing.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 27, 2004
    Assignee: Akashi Corporation
    Inventors: Masaru Kawazoe, Mituru Oda, Tomoharu Yamada
  • IMPRESSION FORMING MECHANISM AND METHOD, AND HARDNESS TESTING APPARATUS AND METHOD
    Publication number: 20040050149
    Abstract: A hardness testing apparatus comprises a sample table mounting a sample thereon, a loading arm having an indentor at its free end, a loading arm operation controlling unit, an electromagnetic brake. When the sample is elevated and brought into contact with the indentor, the loading arm is moved upwardly. The loading arm operation controlling unit calculates a predetermined force to be applied to the sample in response to a displacement from a reference position of the loading arm when and after the sample is brought into contact with the indentor. The loading arm is moved upwardly such that a predetermined force calculated by the loading arm operating controlling unit is applied to the sample. The electromagnetic brake controls an elevating operation of the sample table. A direction of a current supplied to the electromagnetic brake is inverted at a predetermined timing.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 18, 2004
    Applicant: Akashi Corporation
    Inventors: Masaru Kawazoe, Mituru Oda, Tomoharu Yamada