Patents by Inventor Toru TSUKUI

Toru TSUKUI 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).

  • Combined oil ring
    Patent number: 10520085
    Abstract: A combined oil ring in which carbon sludge and the like are not deposited between side rails and a spacer expander even if an internal combustion engine is operated for a long period of time. The combined oil ring includes an outer circumferential end portion of a space forming part and a continuous part that are closed and not open toward the outer circumferential side, thereby reducing carbon sludge deposits.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: December 31, 2019
    Assignee: NIPPON PISTON RING CO., LTD.
    Inventors: Yasuyuki Murata, Kenji Arai, Ryosuke Kamata, Hideshi Hitosugi, Kazumoto Takahashi, Toru Tsukui
  • COMBINED OIL RING
    Publication number: 20180051806
    Abstract: A combined oil ring in which carbon sludge and the like are not deposited between side rails and a spacer expander even if an internal combustion engine is operated for a long period of time. The combined oil ring includes an outer circumferential end portion of a space forming part and a continuous part that are closed and not open toward the outer circumferential side, thereby reducing carbon sludge deposits.
    Type: Application
    Filed: March 31, 2016
    Publication date: February 22, 2018
    Applicant: NIPPON PISTON RING CO., LTD
    Inventors: Yasuyuki MURATA, Kenji ARAI, Ryosuke KAMATA, Hideshi HITOSUGI, Kazutomo TAKAHASHI, Toru TSUKUI