Patents by Inventor Masahiro SASANO

Masahiro SASANO 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).

  • Cutting insert and boring tool
    Patent number: 11040404
    Abstract: A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: June 22, 2021
    Assignees: SUMITOMO ELECTRIC HARDMETAL CORP., BIG DAISHOWA SEIKI CO., LTD.
    Inventors: Naoki Matsuda, Hideo Maeno, Chikara Kimura, Yoshihiro Kuroda, Takafumi Takami, Junichi Koyama, Masahiro Sasano
  • CUTTING INSERT AND BORING TOOL
    Publication number: 20200406368
    Abstract: A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.
    Type: Application
    Filed: September 13, 2019
    Publication date: December 31, 2020
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., BIG DAISHOWA SEIKI CO., LTD.
    Inventors: Naoki MATSUDA, Hideo MAENO, Chikara KIMURA, Yoshihiro KURODA, Takafumi TAKAMI, Junichi KOYAMA, Masahiro SASANO