Patents by Inventor Hidetaro KAYANUMA

Hidetaro KAYANUMA 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).

  • Screw rotor processing method and screw rotor lead correction calculation device
    Patent number: 11890721
    Abstract: A screw rotor lead correction calculation device includes an initial data input section configured to input an error as a distance with respect to a reference lead at each axial position of a rotor groove portion of a screw rotor, and a processing machine input correction amount/position output section configured to compute and output, based on the error as the distance input to the initial data input section, a lead correction amount with respect to the reference lead and a lead correction starting position as an axial position for starting lead correction. With this configuration, correction data for obtaining a screw rotor with a high-accuracy lead can be obtained from a lead error with respect to a reference lead in a screw rotor obtained by ground finish of the material of the screw rotor.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: February 6, 2024
    Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.
    Inventors: Toshio Yamanaka, Koji Utsumi, Hisashi Aoki, Yoshiyuki Yamada, Hidetaro Kayanuma
  • SCREW ROTOR PROCESSING METHOD AND SCREW ROTOR LEAD CORRECTION CALCULATION DEVICE
    Publication number: 20190283207
    Abstract: A screw rotor lead correction calculation device includes an initial data input section configured to input an error as a distance with respect to a reference lead at each axial position of a rotor groove portion of a screw rotor, and a processing machine input correction amount/position output section configured to compute and output, based on the error as the distance input to the initial data input section, a lead correction amount with respect to the reference lead and a lead correction starting position as an axial position for starting lead correction. With this configuration, correction data for obtaining a screw rotor with a high-accuracy lead can be obtained from a lead error with respect to a reference lead in a screw rotor obtained by ground finish of the material of the screw rotor.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 19, 2019
    Inventors: Toshio YAMANAKA, Koji UTSUMI, Hisashi AOKI, Yoshiyuki YAMADA, Hidetaro KAYANUMA