Patents by Inventor Yoshimitsu KOYAMA

Yoshimitsu KOYAMA 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).

  • Coil spring manufacturing method and coil spring manufacturing device
    Patent number: 11065641
    Abstract: Provided is a coil spring manufacturing method. In the coil spring manufacturing method, a coil spring of a vehicle suspension member is immersed in a fluidized bed in which powder coat is fluidized for coating. The fluidized bed includes a vertical stream area in which the powder coat moves upward and downward. The coil spring is immersed in the vertical stream area of the fluidized bed while an end coil of the coil spring faces upward, and is periodically subjected to a relative movement with respect to a direction containing components vertical to a central axis of the coil spring in relation to the vertical stream area.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: July 20, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yoshimitsu Koyama, Mitsuhiro Sugiyama, Tatsuya Watanuki
  • COIL SPRING MANUFACTURING METHOD AND COIL SPRING MANUFACTURING DEVICE
    Publication number: 20180361424
    Abstract: Provided is a coil spring manufacturing method. In the coil spring manufacturing method, a coil spring of a vehicle suspension member is immersed in a fluidized bed in which powder coat is fluidized for coating. The fluidized bed includes a vertical stream area in which the powder coat moves upward and downward. The coil spring is immersed in the vertical stream area of the fluidized bed while an end coil of the coil spring faces upward, and is periodically subjected to a relative movement with respect to a direction containing components vertical to a central axis of the coil spring in relation to the vertical stream area.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 20, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yoshimitsu KOYAMA, Mitsuhiro SUGIYAMA, Tatsuya WATANUKI