Patents by Inventor Mitsuru Otaki

Mitsuru Otaki 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).

  • Taper reamer
    Patent number: 10926344
    Abstract: Provided is a taper reamer with which it is possible to achieve an improvement in machining accuracy and machining life. The taper reamer comprises a plurality of cutting edges each having a helical shape provided on the outer periphery of a cutting-edge portion having an external diameter being expanded from a front end toward a rear end thereof, wherein an intertooth angle, defined between each of a pair of the cutting edges adjacently arranged in a circumferential direction, is different from one another at any given reference position, and wherein the plurality of cutting edges each have a helix angle that is different from one another. As the plurality of cutting edges that are unequally partitioned each have the helix angle that is different from one another, a resonance during cutting can be prevented.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: February 23, 2021
    Assignee: ISHII CORPORATION CO., LTD.
    Inventors: Yasushi Sasagawa, Yuichi Hirokawa, Hiroshi Saito, Takumi Abe, Shunsuke Sakuma, Yuki Ogiue, Satoshi Koike, Mitsuru Otaki, Hiroto Kanda, Suguru Machiya, Hifumi Okada
  • TAPER REAMER
    Publication number: 20200215631
    Abstract: Provided is a taper reamer with which it is possible to achieve an improvement in machining accuracy and machining life. The taper reamer comprises a plurality of cutting edges each having a helical shape provided on the outer periphery of a cutting-edge portion having an external diameter being expanded from a front end toward a rear end thereof, wherein an intertooth angle, defined between each of a pair of the cutting edges adjacently arranged in a circumferential direction, is different from one another at any given reference position, and wherein the plurality of cutting edges each have a helix angle that is different from one another. As the plurality of cutting edges that are unequally partitioned each have the helix angle that is different from one another, a resonance during cutting can be prevented.
    Type: Application
    Filed: August 28, 2018
    Publication date: July 9, 2020
    Inventors: Yasushi Sasagawa, Yuichi Hirokawa, Hiroshi Saito, Takumi Abe, Shunsuke Sakuma, Yuki Ogiue, Satoshi Koike, Mitsuru Otaki, Hiroto Kanda, Suguru Machiya, Hifumi Okada