Patents by Inventor Shuichirou HAMANAKA

Shuichirou HAMANAKA 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).

  • Thrust washer
    Patent number: 11396907
    Abstract: A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: July 26, 2022
    Assignee: TPR CO., LTD.
    Inventors: Masaki Ikeda, Shuichirou Hamanaka
  • THRUST WASHER
    Publication number: 20220056949
    Abstract: A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%
    Type: Application
    Filed: December 13, 2019
    Publication date: February 24, 2022
    Applicant: TPR CO., LTD.
    Inventors: Masaki IKEDA, Shuichirou HAMANAKA